Repair the copyright per Casser author's request. Also fix DOS line endings.

Delegate-based delete-tracking cache implementation, fixes to javax.cache.Cache implementation, and unit tests

.gitignore

@@ -1,3 +1,8 @@
+.gradle/
+build/
+gradle/
+gradlew
+gradlew.bat
 *.iml
 .idea
 infer-out

.idea/eclipseCodeFormatter.xml

@@ -3,7 +3,6 @@
   <component name="EclipseCodeFormatterProjectSettings">
     <option name="projectSpecificProfile">
       <ProjectSpecificProfile>
-        <option name="formatter" value="ECLIPSE" />
         <option name="pathToConfigFileJava" value="$PROJECT_DIR$/../newton/formatting/onshape-eclipse-general-preferences.epf" />
       </ProjectSpecificProfile>
     </option>

NOTES

@@ -0,0 +1,202 @@
+Operation/
+|-- AbstractStatementOperation
+|   |-- AbstractOperation
+|   |   |-- AbstractFilterOperation
+|   |   |   |-- CountOperation
+|   |   |   |-- DeleteOperation
+|   |   |   `-- UpdateOperation
+|   |   |-- BoundOperation
+|   |   `-- InsertOperation
+|   |-- AbstractOptionalOperation
+|   |   |-- AbstractFilterOptionalOperation
+|   |   |   |-- SelectFirstOperation
+|   |   |   `-- SelectFirstTransformingOperation
+|   |   `-- BoundOptionalOperation
+|   `-- AbstractStreamOperation
+|       |-- AbstractFilterStreamOperation
+    |       |   |-- SelectOperation
+|       |   `-- SelectTransformingOperation
+|       `-- BoundStreamOperation
+|-- PreparedOperation
+|-- PreparedOptionalOperation
+`-- PreparedStreamOperation
+
+
+----
+@CompoundIndex()
+create a new col in the same table called __idx_a_b_c that the hash of the concatenated values in that order is stored, create a normal index for that (CREATE INDEX ...)
+if a query matches that set of columns then use that indexed col to fetch the desired results from that table
+could also work with .in() query if materialized view exists
+----
+
+
+    // TODO(gburd): create a statement that matches one that wasn't prepared
+    //String key =
+    //    "use " + preparedStatement.getQueryKeyspace() + "; " + preparedStatement.getQueryString();
+    //for (Object param : params) {
+    //  key = key.replaceFirst(Pattern.quote("?"), param.toString());
+    //}
+
+
+
+
+primitive types have default values, (e.g. boolean, int, ...) but primative wrapper classes do not and can be null (e.g. Boolean, Integer, ...)
+
+create table wal {
+  id timeuuid,
+  follows timeuuid,
+  read <Counting Quotient Filter, Set<{keyspace, col, schema generation, timestamp}>>
+  write <Counting Quotient Filter, Set<{keyspace, col, schema generation, timestamp}>>
+  primary key (id, follows)
+}
+begin:
+  - insert into wal (timeuuid, parent timeuuid,
+
+
+
+        // NOTE: Update operations have no meaning when they only contain primary key components, so
+        // given that `properties` is ordered with the keys first if we find that the last element
+        // is either a partition key or clustering column then we know we should just skip this operation.
+        ColumnType ct = ((HelenusProperty) properties.toArray()[properties.size() - 1]).getColumnType();
+        if (ct != ColumnType.PARTITION_KEY && ct != ColumnType.CLUSTERING_COLUMN) {
+            return;
+        }
+
+
+
+	public Stream<E> sync() {
+	    ListenableFuture<Stream<E>> future = async();
+        Futures.addCallback(future, new FutureCallback<String>() {
+            @Override
+            public void onSuccess(String contents) {
+                //...process web site contents
+            }
+
+            @Override
+            public void onFailure(Throwable throwable) {
+                log.error("Exception in task", throwable);
+            }
+        });
+	}
+-------
+  private mergeCache(Map<String, Set<Object>>
+
+  private static <E> Iterable<E> concat(
+          Iterable<? extends E> i1,
+          Iterable<? extends E> i2) {
+    return new Iterable<E>() {
+      public Iterator<E> iterator() {
+        return new Iterator<E>() {
+          Iterator<? extends E> listIterator = i1.iterator();
+          Boolean checkedHasNext;
+          E nextValue;
+          private boolean startTheSecond;
+
+          void theNext() {
+            if (listIterator.hasNext()) {
+              checkedHasNext = true;
+              nextValue = listIterator.next();
+            } else if (startTheSecond)
+              checkedHasNext = false;
+            else {
+              startTheSecond = true;
+              listIterator = i2.iterator();
+              theNext();
+            }
+          }
+
+          public boolean hasNext() {
+            if (checkedHasNext == null)
+              theNext();
+            return checkedHasNext;
+          }
+
+          public E next() {
+            if (!hasNext())
+              throw new NoSuchElementException();
+            checkedHasNext = null;
+            return nextValue;
+          }
+
+          public void remove() {
+            listIterator.remove();
+          }
+        };
+      }
+    };
+  }
+----------------------------------
+      if ("ttl".equals(methodName) && method.getParameterCount() == 1 && method.getReturnType() == int.class) {
+          Getter getter = (Getter) args[0];
+          if (getter == null) {
+              return false;
+          }
+          HelenusProperty prop = MappingUtil.resolveMappingProperty(getter).getProperty();
+          String getterName = prop.getPropertyName();
+          String ttlKeyForProperty = prop.getColumnName().toCql() + "_ttl";
+          if (src.containsKey(ttlKeyForProperty)) {
+              return src.get(ttlKeyForProperty);
+          } else {
+              return 0;
+          }
+      }
+
+      if ("written".equals(methodName) && method.getParameterCount() == 1 && method.getReturnType() == int.class) {
+          Getter getter = (Getter) args[0];
+          if (getter == null) {
+              return false;
+          }
+          HelenusProperty prop = MappingUtil.resolveMappingProperty(getter).getProperty();
+          String getterName = prop.getPropertyName();
+          String ttlKeyForProperty = prop.getColumnName().toCql() + "_ttl";
+          if (src.containsKey(ttlKeyForProperty)) {
+              return src.get(ttlKeyForProperty);
+          } else {
+              return 0;
+          }
+      }
+
+
+
+-----------------
+
+
+/*else {
+			    Cache<String, Object> cache = session.getSessionCache();
+				Map<String, Object> rowMap = this.cache.rowMap();
+				for (String rowKey : rowMap.keySet()) {
+					String keys = flattenFacets(facets);
+					for (String key : keys) {
+						Object value = cache.getIfPresent(key);
+						if (value != null) {
+							result = Optional.of(value);
+							break;
+						}
+					}
+				}
+			    cache.put
+            }
+			*/
+------------------
+
+InsertOperation
+
+
+		Class<?> iface = entity.getMappingInterface();
+		boolean includesNonIdentityValues = values.stream().map(t -> {
+					ColumnType type = t._1.getProperty().getColumnType();
+					return !((type == ColumnType.PARTITION_KEY) || (type == ColumnType.CLUSTERING_COLUMN));
+				})
+				.reduce(false, (acc, t) -> acc || t);
+		if (resultType == iface) {
+			if (values.size() > 0 && includesNonIdentityValues) {
+				boolean immutable = iface.isAssignableFrom(Drafted.class);
+-------------------
+
+    final Object value;
+    if (method.getParameterCount() == 1 && args[0] instanceof Boolean && src instanceof ValueProviderMap) {
+      value = ((ValueProviderMap)src).get(methodName, (Boolean)args[0]);
+    } else {
+      value = src.get(methodName);
+    }
+--------------------

README.md

@@ -1,5 +1,5 @@
 # Helenus
-Fast and easy, functional style cutting edge Java 8 and Scala 2.11 Cassandra client for C* 3.x
+Fast and easy, functional style cutting edge Java 8 Cassandra client for C* 3.x
 
 
 ### Features
@@ -9,14 +9,13 @@ Fast and easy, functional style cutting edge Java 8 and Scala 2.11 Cassandra cli
 * Reactive asynchronous and synchronous API
 * Provides Java mapping for Tables, Tuples, UDTs (User Defined Type), Collections, UDT Collections, Tuple Collections
 * Uses lazy mapping in all cases where possible
-* Supports Guava ListenableFuture and Scala Future
+* Supports Java 8 Futures and Guava ListenableFuture
 
 ### Requirements
 
 * JVM 8
 * Datastax Driver 3.x
 * Cassandra 3.x
-* Scala 2.11+
 * Maven
 
 ### Maven
@@ -32,27 +31,6 @@ Latest release dependency:
 </dependencies>
 ```
 
-Active development dependency for Scala 2.11:
-```
-<dependencies>
-	<dependency>
-		<groupId>net.helenus</groupId>
-		<artifactId>helenus-core</artifactId>
-		<version>1.2.0_2.11-SNAPSHOT</version>
-	</dependency>
-</dependencies>
-
-<repositories>
-    <repository>
-        <id>oss-sonatype</id>
-        <name>oss-sonatype</name>
-        <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
-        <snapshots>
-            <enabled>true</enabled>
-        </snapshots>
-    </repository>
-</repositories>
-```
 
 ### Simple Example
 
@@ -132,7 +110,6 @@ public interface AbstractRepository {
 
 Account repository:
 ```
-import scala.concurrent.Future;
 
 public interface AccountRepository extends AbstractRepository {
 

bin/deploy.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+mvn clean jar:jar javadoc:jar source:jar deploy -Prelease

bin/format.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+if [ "X$1" == "Xall" ]; then
+  for f in $(find ./src -name \*.java); do
+    echo Formatting $f
+    java -jar ./lib/google-java-format-1.3-all-deps.jar --replace $f
+  done
+else
+  for file in $(git status --short | awk '{print $2}'); do
+    echo $file
+    java -jar ./lib/google-java-format-1.3-all-deps.jar --replace $file
+  done
+fi
+

bin/sign.sh

@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 mvn clean jar:jar javadoc:jar source:jar install -Prelease

deploy.sh

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-mvn clean jar:jar javadoc:jar source:jar deploy -Prelease 

helenus-core.iml

@@ -11,10 +11,7 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Maven: com.github.ben-manes.caffeine:caffeine:2.5.3" level="project" />
-    <orderEntry type="library" name="Maven: io.dropwizard.metrics:metrics-core:3.2.3" level="project" />
-    <orderEntry type="library" name="Maven: org.scala-lang:scala-library:2.13.0-M1" level="project" />
-    <orderEntry type="library" name="Maven: com.datastax.cassandra:cassandra-driver-core:3.3.0" level="project" />
+    <orderEntry type="library" name="Maven: com.datastax.cassandra:cassandra-driver-core:3.3.2" level="project" />
     <orderEntry type="library" name="Maven: io.netty:netty-handler:4.0.47.Final" level="project" />
     <orderEntry type="library" name="Maven: io.netty:netty-buffer:4.0.47.Final" level="project" />
     <orderEntry type="library" name="Maven: io.netty:netty-common:4.0.47.Final" level="project" />
@@ -31,14 +28,15 @@
     <orderEntry type="library" name="Maven: com.github.jnr:jnr-x86asm:1.0.2" level="project" />
     <orderEntry type="library" name="Maven: com.github.jnr:jnr-posix:3.0.27" level="project" />
     <orderEntry type="library" name="Maven: com.github.jnr:jnr-constants:0.9.0" level="project" />
-    <orderEntry type="library" name="Maven: org.aspectj:aspectjrt:1.8.10" level="project" />
+    <orderEntry type="library" name="Maven: com.datastax.cassandra:cassandra-driver-extras:3.3.2" level="project" />
+    <orderEntry type="library" name="Maven: com.diffplug.durian:durian:3.4.0" level="project" />
     <orderEntry type="library" name="Maven: org.aspectj:aspectjweaver:1.8.10" level="project" />
     <orderEntry type="library" name="Maven: org.apache.commons:commons-lang3:3.6" level="project" />
     <orderEntry type="library" name="Maven: org.springframework:spring-core:4.3.10.RELEASE" level="project" />
     <orderEntry type="library" name="Maven: commons-logging:commons-logging:1.2" level="project" />
+    <orderEntry type="library" name="Maven: javax.cache:cache-api:1.1.0" level="project" />
     <orderEntry type="library" name="Maven: com.google.guava:guava:20.0" level="project" />
-    <orderEntry type="library" name="Maven: com.github.ben-manes.caffeine:caffeine:2.5.3" level="project" />
-    <orderEntry type="library" name="Maven: io.dropwizard.metrics:metrics-core:3.2.3" level="project" />
+    <orderEntry type="library" name="Maven: io.dropwizard.metrics:metrics-core:3.2.2" level="project" />
     <orderEntry type="library" name="Maven: javax.validation:validation-api:2.0.0.CR3" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.codehaus.jackson:jackson-mapper-asl:1.9.13" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: com.anthemengineering.mojo:infer-maven-plugin:0.1.0" level="project" />
@@ -114,10 +112,11 @@
     <orderEntry type="library" scope="TEST" name="Maven: org.fusesource:sigar:1.6.4" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.eclipse.jdt.core.compiler:ecj:4.4.2" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.caffinitas.ohc:ohc-core:0.4.4" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: com.github.ben-manes.caffeine:caffeine:2.2.6" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.jctools:jctools-core:1.2.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: ca.exprofesso:guava-jcache:1.0.4" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: commons-io:commons-io:2.5" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
-    <orderEntry type="library" scope="TEST" name="Maven: com.github.stephenc:jamm:0.2.5" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-library:1.3" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.mockito:mockito-core:2.8.47" level="project" />

pom.xml

@@ -4,8 +4,8 @@
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.helenus</groupId>
-    <artifactId>helenus-core</artifactId>
-    <version>2.0.5-SNAPSHOT</version>
+    <artifactId>helenus-net-core</artifactId>
+    <version>2.1</version>
     <packaging>jar</packaging>
 
     <name>helenus</name>
@@ -40,6 +40,9 @@
     <properties>
         <dist.id>helenus</dist.id>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.source>1.8</maven.compiler.source>
     </properties>
 
     <repositories>
@@ -104,21 +107,21 @@
     <dependencies>
 
         <dependency>
-            <groupId>org.scala-lang</groupId>
-            <artifactId>scala-library</artifactId>
-            <version>2.13.0-M1</version>
+            <groupId>com.datastax.cassandra</groupId>
+            <artifactId>cassandra-driver-core</artifactId>
+            <version>3.3.2</version>
         </dependency>
 
         <dependency>
             <groupId>com.datastax.cassandra</groupId>
-            <artifactId>cassandra-driver-core</artifactId>
-            <version>3.3.0</version>
+            <artifactId>cassandra-driver-extras</artifactId>
+            <version>3.3.2</version>
         </dependency>
 
         <dependency>
-            <groupId>org.aspectj</groupId>
-            <artifactId>aspectjrt</artifactId>
-            <version>1.8.10</version>
+            <groupId>com.diffplug.durian</groupId>
+            <artifactId>durian</artifactId>
+            <version>3.4.0</version>
         </dependency>
 
         <dependency>
@@ -139,25 +142,23 @@
             <version>4.3.10.RELEASE</version>
         </dependency>
 
+        <dependency>
+            <groupId>javax.cache</groupId>
+            <artifactId>cache-api</artifactId>
+            <version>1.1.0</version>
+        </dependency>
+
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
             <version>20.0</version>
         </dependency>
 
-        <!-- Caching -->
-        <dependency>
-            <groupId>com.github.ben-manes.caffeine</groupId>
-            <artifactId>caffeine</artifactId>
-            <version>2.5.3</version>
-        </dependency>
-
         <!-- Metrics -->
-        <!-- https://mvnrepository.com/artifact/io.dropwizard.metrics/metrics-core -->
         <dependency>
             <groupId>io.dropwizard.metrics</groupId>
             <artifactId>metrics-core</artifactId>
-            <version>3.2.3</version>
+            <version>3.2.2</version>
         </dependency>
 
         <!-- Validation -->
@@ -210,6 +211,24 @@
             <scope>test</scope>
         </dependency>
 
+
+        <dependency>
+            <groupId>ca.exprofesso</groupId>
+            <artifactId>guava-jcache</artifactId>
+            <version>1.0.4</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.google.guava</groupId>
+                    <artifactId>guava</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>javax.cache</groupId>
+                    <artifactId>cache-api</artifactId>
+                </exclusion>
+            </exclusions>
+            <scope>test</scope>
+        </dependency>
+
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
@@ -224,13 +243,6 @@
             <scope>test</scope>
         </dependency>
 
-        <dependency>
-            <groupId>com.github.stephenc</groupId>
-            <artifactId>jamm</artifactId>
-            <version>0.2.5</version>
-            <scope>test</scope>
-        </dependency>
-
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-library</artifactId>
@@ -265,7 +277,6 @@
             <version>1.7.1</version>
             <scope>runtime</scope>
         </dependency>
-
     </dependencies>
 
     <build>

src/main/java/com/datastax/driver/core/DefaultMetadata.java

@@ -5,7 +5,9 @@ import java.util.List;
 
 public class DefaultMetadata extends Metadata {
 
-    public DefaultMetadata() { super(null); }
+  public DefaultMetadata() {
+    super(null);
+  }
 
   private DefaultMetadata(Cluster.Manager cluster) {
     super(cluster);
@@ -18,5 +20,4 @@ public class DefaultMetadata extends Metadata {
   public TupleType newTupleType(List<DataType> types) {
     return new TupleType(types, ProtocolVersion.NEWEST_SUPPORTED, CodecRegistry.DEFAULT_INSTANCE);
   }
-
 }

src/main/java/com/datastax/driver/core/querybuilder/IsNotNullClause.java

@@ -0,0 +1,49 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+package com.datastax.driver.core.querybuilder;
+
+import com.datastax.driver.core.CodecRegistry;
+import java.util.List;
+
+public class IsNotNullClause extends Clause {
+
+  final String name;
+
+  public IsNotNullClause(String name) {
+    this.name = name;
+  }
+
+  @Override
+  String name() {
+    return name;
+  }
+
+  @Override
+  Object firstValue() {
+    return null;
+  }
+
+  @Override
+  void appendTo(StringBuilder sb, List<Object> variables, CodecRegistry codecRegistry) {
+    Utils.appendName(name, sb).append(" IS NOT NULL");
+  }
+
+  @Override
+  boolean containsBindMarker() {
+    return false;
+  }
+}

src/main/java/com/datastax/driver/core/schemabuilder/CreateCustomIndex.java

@@ -1,10 +1,8 @@
 package com.datastax.driver.core.schemabuilder;
 
-import com.google.common.base.Optional;
+import static com.datastax.driver.core.schemabuilder.SchemaStatement.*;
 
-import static com.datastax.driver.core.schemabuilder.SchemaStatement.STATEMENT_START;
-import static com.datastax.driver.core.schemabuilder.SchemaStatement.validateNotEmpty;
-import static com.datastax.driver.core.schemabuilder.SchemaStatement.validateNotKeyWord;
+import com.google.common.base.Optional;
 
 public class CreateCustomIndex extends CreateIndex {
 
@@ -18,7 +16,10 @@ public class CreateCustomIndex extends CreateIndex {
   CreateCustomIndex(String indexName) {
     super(indexName);
     validateNotEmpty(indexName, "Index name");
-        validateNotKeyWord(indexName, String.format("The index name '%s' is not allowed because it is a reserved keyword", indexName));
+    validateNotKeyWord(
+        indexName,
+        String.format(
+            "The index name '%s' is not allowed because it is a reserved keyword", indexName));
     this.indexName = indexName;
   }
 
@@ -42,8 +43,15 @@ public class CreateCustomIndex extends CreateIndex {
   public CreateIndex.CreateIndexOn onTable(String keyspaceName, String tableName) {
     validateNotEmpty(keyspaceName, "Keyspace name");
     validateNotEmpty(tableName, "Table name");
-        validateNotKeyWord(keyspaceName, String.format("The keyspace name '%s' is not allowed because it is a reserved keyword", keyspaceName));
-        validateNotKeyWord(tableName, String.format("The table name '%s' is not allowed because it is a reserved keyword", tableName));
+    validateNotKeyWord(
+        keyspaceName,
+        String.format(
+            "The keyspace name '%s' is not allowed because it is a reserved keyword",
+            keyspaceName));
+    validateNotKeyWord(
+        tableName,
+        String.format(
+            "The table name '%s' is not allowed because it is a reserved keyword", tableName));
     this.keyspaceName = Optional.fromNullable(keyspaceName);
     this.tableName = tableName;
     return new CreateCustomIndex.CreateIndexOn();
@@ -57,46 +65,26 @@ public class CreateCustomIndex extends CreateIndex {
    */
   public CreateIndex.CreateIndexOn onTable(String tableName) {
     validateNotEmpty(tableName, "Table name");
-        validateNotKeyWord(tableName, String.format("The table name '%s' is not allowed because it is a reserved keyword", tableName));
+    validateNotKeyWord(
+        tableName,
+        String.format(
+            "The table name '%s' is not allowed because it is a reserved keyword", tableName));
     this.tableName = tableName;
     return new CreateCustomIndex.CreateIndexOn();
   }
 
-    public class CreateIndexOn extends CreateIndex.CreateIndexOn {
-        /**
-         * Specify the column to create the index on.
-         *
-         * @param columnName the column name.
-         * @return the final CREATE INDEX statement.
-         */
-        public SchemaStatement andColumn(String columnName) {
-            validateNotEmpty(columnName, "Column name");
-            validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
-            CreateCustomIndex.this.columnName = columnName;
-            return SchemaStatement.fromQueryString(buildInternal());
+  String getCustomClassName() {
+    return "";
   }
 
-        /**
-         * Create an index on the keys of the given map column.
-         *
-         * @param columnName the column name.
-         * @return the final CREATE INDEX statement.
-         */
-        public SchemaStatement andKeysOfColumn(String columnName) {
-            validateNotEmpty(columnName, "Column name");
-            validateNotKeyWord(columnName, String.format("The column name '%s' is not allowed because it is a reserved keyword", columnName));
-            CreateCustomIndex.this.columnName = columnName;
-            CreateCustomIndex.this.keys = true;
-            return SchemaStatement.fromQueryString(buildInternal());
+  String getOptions() {
+    return "";
   }
-    }
-
-    String getCustomClassName() { return ""; }
-    String getOptions() { return ""; }
 
   @Override
   public String buildInternal() {
-        StringBuilder createStatement = new StringBuilder(STATEMENT_START).append("CREATE CUSTOM INDEX ");
+    StringBuilder createStatement =
+        new StringBuilder(STATEMENT_START).append("CREATE CUSTOM INDEX ");
 
     if (ifNotExists) {
       createStatement.append("IF NOT EXISTS ");
@@ -129,4 +117,39 @@ public class CreateCustomIndex extends CreateIndex {
 
     return createStatement.toString();
   }
+
+  public class CreateIndexOn extends CreateIndex.CreateIndexOn {
+    /**
+     * Specify the column to create the index on.
+     *
+     * @param columnName the column name.
+     * @return the final CREATE INDEX statement.
+     */
+    public SchemaStatement andColumn(String columnName) {
+      validateNotEmpty(columnName, "Column name");
+      validateNotKeyWord(
+          columnName,
+          String.format(
+              "The column name '%s' is not allowed because it is a reserved keyword", columnName));
+      CreateCustomIndex.this.columnName = columnName;
+      return SchemaStatement.fromQueryString(buildInternal());
+    }
+
+    /**
+     * Create an index on the keys of the given map column.
+     *
+     * @param columnName the column name.
+     * @return the final CREATE INDEX statement.
+     */
+    public SchemaStatement andKeysOfColumn(String columnName) {
+      validateNotEmpty(columnName, "Column name");
+      validateNotKeyWord(
+          columnName,
+          String.format(
+              "The column name '%s' is not allowed because it is a reserved keyword", columnName));
+      CreateCustomIndex.this.columnName = columnName;
+      CreateCustomIndex.this.keys = true;
+      return SchemaStatement.fromQueryString(buildInternal());
+    }
+  }
 }

src/main/java/com/datastax/driver/core/schemabuilder/CreateMaterializedView.java

@@ -0,0 +1,57 @@
+package com.datastax.driver.core.schemabuilder;
+
+import com.datastax.driver.core.CodecRegistry;
+import com.datastax.driver.core.querybuilder.Select;
+
+public class CreateMaterializedView extends Create {
+
+  private final String viewName;
+  private Select.Where selection;
+  private String primaryKey;
+  private String clustering;
+
+  public CreateMaterializedView(
+      String keyspaceName,
+      String viewName,
+      Select.Where selection,
+      String primaryKey,
+      String clustering) {
+    super(keyspaceName, viewName);
+    this.viewName = viewName;
+    this.selection = selection;
+    this.primaryKey = primaryKey;
+    this.clustering = clustering;
+  }
+
+  public String getQueryString(CodecRegistry codecRegistry) {
+    return buildInternal();
+  }
+
+  public String buildInternal() {
+    StringBuilder createStatement =
+        new StringBuilder(STATEMENT_START).append("CREATE MATERIALIZED VIEW");
+    if (ifNotExists) {
+      createStatement.append(" IF NOT EXISTS");
+    }
+    createStatement.append(" ");
+    if (keyspaceName.isPresent()) {
+      createStatement.append(keyspaceName.get()).append(".");
+    }
+    createStatement.append(viewName);
+    createStatement.append(" AS ");
+    createStatement.append(selection.getQueryString());
+    createStatement.setLength(createStatement.length() - 1);
+    createStatement.append(" ");
+    createStatement.append(primaryKey);
+    if (clustering != null) {
+      createStatement.append(" ").append(clustering);
+    }
+    createStatement.append(";");
+
+    return createStatement.toString();
+  }
+
+  public String toString() {
+    return buildInternal();
+  }
+}

src/main/java/com/datastax/driver/core/schemabuilder/CreateTable.java

@@ -17,9 +17,7 @@ package com.datastax.driver.core.schemabuilder;
 
 import com.datastax.driver.core.CodecRegistry;
 
-/**
- * A built CREATE TABLE statement.
- */
+/** A built CREATE TABLE statement. */
 public class CreateTable extends Create {
 
   public CreateTable(String keyspaceName, String tableName) {

src/main/java/com/datastax/driver/core/schemabuilder/DropMaterializedView.java

@@ -0,0 +1,52 @@
+package com.datastax.driver.core.schemabuilder;
+
+import com.google.common.base.Optional;
+
+public class DropMaterializedView extends Drop {
+
+  private Optional<String> keyspaceName = Optional.absent();
+  private String itemName;
+  private boolean ifExists = true;
+
+  public DropMaterializedView(String keyspaceName, String viewName) {
+    this(keyspaceName, viewName, DroppedItem.MATERIALIZED_VIEW);
+  }
+
+  private DropMaterializedView(String keyspaceName, String viewName, DroppedItem itemType) {
+    super(keyspaceName, viewName, Drop.DroppedItem.TABLE);
+    validateNotEmpty(keyspaceName, "Keyspace name");
+    this.keyspaceName = Optional.fromNullable(keyspaceName);
+    this.itemName = viewName;
+  }
+
+  /**
+   * Add the 'IF EXISTS' condition to this DROP statement.
+   *
+   * @return this statement.
+   */
+  public Drop ifExists() {
+    this.ifExists = true;
+    return this;
+  }
+
+  @Override
+  public String buildInternal() {
+    StringBuilder dropStatement = new StringBuilder("DROP MATERIALIZED VIEW ");
+    if (ifExists) {
+      dropStatement.append("IF EXISTS ");
+    }
+    if (keyspaceName.isPresent()) {
+      dropStatement.append(keyspaceName.get()).append(".");
+    }
+
+    dropStatement.append(itemName);
+    return dropStatement.toString();
+  }
+
+  enum DroppedItem {
+    TABLE,
+    TYPE,
+    INDEX,
+    MATERIALIZED_VIEW
+  }
+}

src/main/java/net/helenus/config/DefaultHelenusSettings.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -17,7 +18,6 @@ package net.helenus.config;
 
 import java.lang.reflect.Method;
 import java.util.function.Function;
-
 import net.helenus.core.DslInstantiator;
 import net.helenus.core.MapperInstantiator;
 import net.helenus.core.reflect.ReflectionDslInstantiator;
@@ -45,5 +45,4 @@ public class DefaultHelenusSettings implements HelenusSettings {
   public MapperInstantiator getMapperInstantiator() {
     return ReflectionMapperInstantiator.INSTANCE;
   }
-
 }

src/main/java/net/helenus/config/GetterMethodDetector.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,13 +16,12 @@
  */
 package net.helenus.config;
 
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.function.Function;
 import net.helenus.mapping.annotation.Transient;
 
-import java.lang.reflect.Method;
-import java.util.function.Function;
-
 public enum GetterMethodDetector implements Function<Method, Boolean> {
-
   INSTANCE;
 
   @Override
@@ -35,13 +35,15 @@ public enum GetterMethodDetector implements Function<Method, Boolean> {
       return false;
     }
 
+    if (Modifier.isStatic(method.getModifiers())) {
+      return false;
+    }
+
     // Methods marked "Transient" are not mapped, skip them.
     if (method.getDeclaredAnnotation(Transient.class) != null) {
       return false;
     }
 
     return true;
-
   }
-
 }

src/main/java/net/helenus/config/HelenusSettings.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -17,7 +18,6 @@ package net.helenus.config;
 
 import java.lang.reflect.Method;
 import java.util.function.Function;
-
 import net.helenus.core.DslInstantiator;
 import net.helenus.core.MapperInstantiator;
 
@@ -30,5 +30,4 @@ public interface HelenusSettings {
   DslInstantiator getDslInstantiator();
 
   MapperInstantiator getMapperInstantiator();
-
 }

src/main/java/net/helenus/core/AbstractAuditedEntityDraft.java

@@ -0,0 +1,38 @@
+package net.helenus.core;
+
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.util.Date;
+import net.helenus.core.reflect.MapExportable;
+
+public abstract class AbstractAuditedEntityDraft<E> extends AbstractEntityDraft<E> {
+
+  public AbstractAuditedEntityDraft(MapExportable entity) {
+    super(entity);
+
+    Date in = new Date();
+    LocalDateTime ldt = LocalDateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
+    Date now = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
+
+    String who = getCurrentAuditor();
+
+    if (entity == null) {
+      if (who != null) {
+        set("createdBy", who);
+      }
+      set("createdAt", now);
+    }
+    if (who != null) {
+      set("modifiedBy", who);
+    }
+    set("modifiedAt", now);
+  }
+
+  protected String getCurrentAuditor() {
+    return null;
+  }
+
+  public Date createdAt() {
+    return get("createdAt", Date.class);
+  }
+}

src/main/java/net/helenus/core/AbstractEntityDraft.java

@@ -0,0 +1,202 @@
+package net.helenus.core;
+
+import com.google.common.primitives.Primitives;
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import net.helenus.core.reflect.DefaultPrimitiveTypes;
+import net.helenus.core.reflect.Drafted;
+import net.helenus.core.reflect.MapExportable;
+import net.helenus.mapping.HelenusProperty;
+import net.helenus.mapping.MappingUtil;
+import org.apache.commons.lang3.SerializationUtils;
+
+public abstract class AbstractEntityDraft<E> implements Drafted<E> {
+
+  private final MapExportable entity;
+  private final Map<String, Object> valuesMap;
+  private final Set<String> readSet;
+  private final Map<String, Object> mutationsMap = new HashMap<String, Object>();
+
+  public AbstractEntityDraft(MapExportable entity) {
+    this.entity = entity;
+    // Entities can mutate their map.
+    if (entity != null) {
+      this.valuesMap = entity.toMap(true);
+      this.readSet = entity.toReadSet();
+    } else {
+      this.valuesMap = new HashMap<String, Object>();
+      this.readSet = new HashSet<String>();
+    }
+  }
+
+  public abstract Class<E> getEntityClass();
+
+  public E build() {
+    return Helenus.map(getEntityClass(), toMap());
+  }
+
+  @SuppressWarnings("unchecked")
+  public <T> T get(Getter<T> getter, Class<?> returnType) {
+    return (T) get(this.<T>methodNameFor(getter), returnType);
+  }
+
+  @SuppressWarnings("unchecked")
+  public <T> T get(String key, Class<?> returnType) {
+    readSet.add(key);
+    T value = (T) mutationsMap.get(key);
+
+    if (value == null) {
+      value = (T) valuesMap.get(key);
+      if (value == null) {
+
+        if (Primitives.allPrimitiveTypes().contains(returnType)) {
+
+          DefaultPrimitiveTypes type = DefaultPrimitiveTypes.lookup(returnType);
+          if (type == null) {
+            throw new RuntimeException("unknown primitive type " + returnType);
+          }
+
+          return (T) type.getDefaultValue();
+        }
+      } else {
+        // Collections fetched from the valuesMap
+        if (value instanceof Collection) {
+          value = (T) SerializationUtils.<Serializable>clone((Serializable) value);
+        }
+      }
+    }
+
+    return value;
+  }
+
+  public <T> Object set(Getter<T> getter, Object value) {
+    HelenusProperty prop = MappingUtil.resolveMappingProperty(getter).getProperty();
+    String key = prop.getPropertyName();
+
+    HelenusValidator.INSTANCE.validate(prop, value);
+
+    if (key == null || value == null) {
+      return null;
+    }
+
+    mutationsMap.put(key, value);
+    return value;
+  }
+
+  public Object set(String key, Object value) {
+    if (key == null || value == null) {
+      return null;
+    }
+
+    mutationsMap.put(key, value);
+    return value;
+  }
+
+  public void put(String key, Object value) {
+    mutationsMap.put(key, value);
+  }
+
+  @SuppressWarnings("unchecked")
+  public <T> T mutate(Getter<T> getter, T value) {
+    return (T) mutate(this.<T>methodNameFor(getter), value);
+  }
+
+  public <T> T mutate(String key, T value) {
+    Objects.requireNonNull(key);
+
+    if (value != null) {
+      if (entity != null) {
+        T currentValue = this.<T>fetch(key);
+        if (!value.equals(currentValue)) {
+          mutationsMap.put(key, value);
+          return value;
+        }
+      } else {
+        mutationsMap.put(key, value);
+      }
+    }
+    return null;
+  }
+
+  private <T> String methodNameFor(Getter<T> getter) {
+    return MappingUtil.resolveMappingProperty(getter).getProperty().getPropertyName();
+  }
+
+  public <T> Object unset(Getter<T> getter) {
+    return unset(methodNameFor(getter));
+  }
+
+  public Object unset(String key) {
+    if (key != null) {
+      Object value = mutationsMap.get(key);
+      mutationsMap.put(key, null);
+      return value;
+    }
+    return null;
+  }
+
+  public <T> boolean reset(Getter<T> getter, T desiredValue) {
+    return this.<T>reset(this.<T>methodNameFor(getter), desiredValue);
+  }
+
+  private <T> T fetch(String key) {
+    T value = (T) mutationsMap.get(key);
+    if (value == null) {
+      value = (T) valuesMap.get(key);
+    }
+    return value;
+  }
+
+  public <T> boolean reset(String key, T desiredValue) {
+    if (key != null && desiredValue != null) {
+      @SuppressWarnings("unchecked")
+      T currentValue = (T) this.<T>fetch(key);
+      if (currentValue == null || !currentValue.equals(desiredValue)) {
+        set(key, desiredValue);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  @Override
+  public Map<String, Object> toMap() {
+    return toMap(valuesMap);
+  }
+
+  public Map<String, Object> toMap(Map<String, Object> entityMap) {
+    Map<String, Object> combined;
+    if (entityMap != null && entityMap.size() > 0) {
+      combined = new HashMap<String, Object>(entityMap.size());
+      for (Map.Entry<String, Object> e : entityMap.entrySet()) {
+        combined.put(e.getKey(), e.getValue());
+      }
+    } else {
+      combined = new HashMap<String, Object>(mutationsMap.size());
+    }
+    for (String key : mutated()) {
+      combined.put(key, mutationsMap.get(key));
+    }
+    return combined;
+  }
+
+  @Override
+  public Set<String> mutated() {
+    return mutationsMap.keySet();
+  }
+
+  @Override
+  public Set<String> read() {
+    return readSet;
+  }
+
+  @Override
+  public String toString() {
+    return mutationsMap.toString();
+  }
+}

src/main/java/net/helenus/core/AbstractSessionOperations.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,133 +16,118 @@
  */
 package net.helenus.core;
 
+import com.codahale.metrics.MetricRegistry;
+import com.datastax.driver.core.*;
+import com.google.common.base.Stopwatch;
+import com.google.common.collect.Table;
+import com.google.common.util.concurrent.ListenableFuture;
 import java.io.PrintStream;
+import java.util.List;
 import java.util.concurrent.Executor;
-
-import com.datastax.driver.core.schemabuilder.SchemaStatement;
+import net.helenus.core.cache.Facet;
+import net.helenus.mapping.value.ColumnValuePreparer;
+import net.helenus.mapping.value.ColumnValueProvider;
+import net.helenus.support.Either;
+import net.helenus.support.HelenusException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.datastax.driver.core.*;
-import com.datastax.driver.core.querybuilder.BuiltStatement;
-import com.google.common.util.concurrent.ListenableFuture;
-
-import net.helenus.mapping.value.ColumnValuePreparer;
-import net.helenus.mapping.value.ColumnValueProvider;
-import net.helenus.support.HelenusException;
-
-import javax.xml.validation.Schema;
-
 public abstract class AbstractSessionOperations {
 
-	final Logger logger = LoggerFactory.getLogger(getClass());
+  private static final Logger LOG = LoggerFactory.getLogger(AbstractSessionOperations.class);
 
-	abstract public Session currentSession();
+  public abstract Session currentSession();
 
-	abstract public String usingKeyspace();
+  public abstract String usingKeyspace();
 
-	abstract public boolean isShowCql();
+  public abstract boolean isShowCql();
 
-	abstract public PrintStream getPrintStream();
+  public abstract boolean showValues();
 
-	abstract public Executor getExecutor();
+  public abstract PrintStream getPrintStream();
 
-	abstract public SessionRepository getSessionRepository();
+  public abstract Executor getExecutor();
 
-	abstract public ColumnValueProvider getValueProvider();
+  public abstract SessionRepository getSessionRepository();
 
-	abstract public ColumnValuePreparer getValuePreparer();
+  public abstract ColumnValueProvider getValueProvider();
+
+  public abstract ColumnValuePreparer getValuePreparer();
+
+  public abstract ConsistencyLevel getDefaultConsistencyLevel();
+
+  public abstract boolean getDefaultQueryIdempotency();
 
   public PreparedStatement prepare(RegularStatement statement) {
-
     try {
-
-			log(statement, false);
-
       return currentSession().prepare(statement);
-
     } catch (RuntimeException e) {
       throw translateException(e);
     }
-
   }
 
   public ListenableFuture<PreparedStatement> prepareAsync(RegularStatement statement) {
-
     try {
-
-			log(statement, false);
-
       return currentSession().prepareAsync(statement);
-
     } catch (RuntimeException e) {
       throw translateException(e);
     }
-
   }
 
-	public ResultSet execute(Statement statement, boolean showValues) {
-
-		return executeAsync(statement, showValues).getUninterruptibly();
-
+  public ResultSet execute(Statement statement) {
+    return execute(statement, null, null);
   }
 
-	public ResultSetFuture executeAsync(Statement statement, boolean showValues) {
+  public ResultSet execute(Statement statement, Stopwatch timer) {
+    return execute(statement, null, timer);
+  }
 
+  public ResultSet execute(Statement statement, UnitOfWork uow) {
+    return execute(statement, uow, null);
+  }
+
+  public ResultSet execute(Statement statement, UnitOfWork uow, Stopwatch timer) {
+    return executeAsync(statement, uow, timer).getUninterruptibly();
+  }
+
+  public ResultSetFuture executeAsync(Statement statement) {
+    return executeAsync(statement, null, null);
+  }
+
+  public ResultSetFuture executeAsync(Statement statement, Stopwatch timer) {
+    return executeAsync(statement, null, timer);
+  }
+
+  public ResultSetFuture executeAsync(Statement statement, UnitOfWork uow) {
+    return executeAsync(statement, uow, null);
+  }
+
+  public ResultSetFuture executeAsync(Statement statement, UnitOfWork uow, Stopwatch timer) {
     try {
-
-			log(statement, showValues);
-
       return currentSession().executeAsync(statement);
-
     } catch (RuntimeException e) {
       throw translateException(e);
     }
-
   }
 
-	void log(Statement statement, boolean showValues) {
-
-		if (logger.isInfoEnabled()) {
-			logger.info("Execute statement " + statement);
+  public MetricRegistry getMetricRegistry() {
+    return null;
   }
 
-		if (isShowCql()) {
-
-			if (statement instanceof BuiltStatement) {
-
-                BuiltStatement builtStatement = (BuiltStatement) statement;
-
-                if (showValues) {
-                    RegularStatement regularStatement = builtStatement.setForceNoValues(true);
-                    printCql(regularStatement.getQueryString());
-                } else {
-                    printCql(builtStatement.getQueryString());
-                }
-
-			} else if (statement instanceof RegularStatement) {
-				RegularStatement regularStatement = (RegularStatement) statement;
-				printCql(regularStatement.getQueryString());
-			} else {
-				printCql(statement.toString());
-			}
-
-		}
-	}
-
-	public abstract void cache(String key, Object value);
+  public void mergeCache(Table<String, String, Either<Object, List<Facet>>> uowCache) {}
 
   RuntimeException translateException(RuntimeException e) {
-
     if (e instanceof HelenusException) {
       return e;
     }
-
     throw new HelenusException(e);
   }
 
-	void printCql(String cql) {
-		getPrintStream().println(cql);
+  public Object checkCache(String tableName, List<Facet> facets) {
+    return null;
   }
 
+  public void updateCache(Object pojo, List<Facet> facets) {}
+
+  public void cacheEvict(List<Facet> facets) {}
 }

src/main/java/net/helenus/core/AutoDdl.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -16,5 +17,8 @@
 package net.helenus.core;
 
 public enum AutoDdl {
-	VALIDATE, UPDATE, CREATE, CREATE_DROP;
+  VALIDATE,
+  UPDATE,
+  CREATE,
+  CREATE_DROP;
 }

src/main/java/net/helenus/core/ConflictingUnitOfWorkException.java

@@ -1,3 +1,20 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
 package net.helenus.core;
 
 public class ConflictingUnitOfWorkException extends Exception {
@@ -7,5 +24,4 @@ public class ConflictingUnitOfWorkException extends Exception {
   ConflictingUnitOfWorkException(UnitOfWork uow) {
     this.uow = uow;
   }
-
 }

src/main/java/net/helenus/core/DslInstantiator.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,13 +16,15 @@
  */
 package net.helenus.core;
 
-import java.util.Optional;
-
 import com.datastax.driver.core.Metadata;
+import java.util.Optional;
 import net.helenus.core.reflect.HelenusPropertyNode;
 
 public interface DslInstantiator {
 
-	<E> E instantiate(Class<E> iface, ClassLoader classLoader, Optional<HelenusPropertyNode> parent, Metadata metadata);
-
+  <E> E instantiate(
+      Class<E> iface,
+      ClassLoader classLoader,
+      Optional<HelenusPropertyNode> parent,
+      Metadata metadata);
 }

src/main/java/net/helenus/core/Filter.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,10 +16,8 @@
  */
 package net.helenus.core;
 
-import java.util.Objects;
-
 import com.datastax.driver.core.querybuilder.Clause;
-
+import java.util.Objects;
 import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.mapping.MappingUtil;
 import net.helenus.mapping.value.ColumnValuePreparer;
@@ -33,14 +32,6 @@ public final class Filter<V> {
     this.postulate = postulate;
   }
 
-	public HelenusPropertyNode getNode() {
-		return node;
-	}
-
-	public Clause getClause(ColumnValuePreparer valuePreparer) {
-		return postulate.getClause(node, valuePreparer);
-	}
-
   public static <V> Filter<V> equal(Getter<V> getter, V val) {
     return create(getter, Operator.EQ, val);
   }
@@ -89,13 +80,21 @@ public final class Filter<V> {
     return new Filter<V>(node, postulate);
   }
 
+  public static <V> Filter<V> create(
+      Getter<V> getter, HelenusPropertyNode node, Postulate<V> postulate) {
+    Objects.requireNonNull(getter, "empty getter");
+    Objects.requireNonNull(postulate, "empty operator");
+    return new Filter<V>(node, postulate);
+  }
+
   public static <V> Filter<V> create(Getter<V> getter, Operator op, V val) {
     Objects.requireNonNull(getter, "empty getter");
     Objects.requireNonNull(op, "empty op");
     Objects.requireNonNull(val, "empty value");
 
     if (op == Operator.IN) {
-			throw new IllegalArgumentException("invalid usage of the 'in' operator, use Filter.in() static method");
+      throw new IllegalArgumentException(
+          "invalid usage of the 'in' operator, use Filter.in() static method");
     }
 
     HelenusPropertyNode node = MappingUtil.resolveMappingProperty(getter);
@@ -105,9 +104,20 @@ public final class Filter<V> {
     return new Filter<V>(node, postulate);
   }
 
+  public HelenusPropertyNode getNode() {
+    return node;
+  }
+
+  public Clause getClause(ColumnValuePreparer valuePreparer) {
+    return postulate.getClause(node, valuePreparer);
+  }
+
+  public V[] postulateValues() {
+    return postulate.values();
+  }
+
   @Override
   public String toString() {
     return node.getColumnName() + postulate.toString();
   }
-
 }

src/main/java/net/helenus/core/Getter.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -18,5 +19,4 @@ package net.helenus.core;
 public interface Getter<V> {
 
   V get();
-
 }

src/main/java/net/helenus/core/Helenus.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,14 +16,15 @@
  */
 package net.helenus.core;
 
-import java.util.*;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentMap;
-
 import com.datastax.driver.core.Cluster;
 import com.datastax.driver.core.Metadata;
 import com.datastax.driver.core.Session;
-
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
 import net.helenus.config.DefaultHelenusSettings;
 import net.helenus.config.HelenusSettings;
 import net.helenus.core.reflect.DslExportable;
@@ -32,15 +34,15 @@ import net.helenus.support.HelenusMappingException;
 
 public final class Helenus {
 
-    private static volatile HelenusSettings settings = new DefaultHelenusSettings();
-    private static final ConcurrentMap<Class<?>, Object> dslCache = new ConcurrentHashMap<Class<?>, Object>();
-    private static final ConcurrentMap<Class<?>, Metadata> metadataForEntity = new ConcurrentHashMap<Class<?>, Metadata>();
+  private static final ConcurrentMap<Class<?>, Object> dslCache =
+      new ConcurrentHashMap<Class<?>, Object>();
+  private static final ConcurrentMap<Class<?>, Metadata> metadataForEntity =
+      new ConcurrentHashMap<Class<?>, Metadata>();
   private static final Set<HelenusSession> sessions = new HashSet<HelenusSession>();
+  private static volatile HelenusSettings settings = new DefaultHelenusSettings();
   private static volatile HelenusSession singleton;
 
-
-    private Helenus() {
-    }
+  private Helenus() {}
 
   protected static void setSession(HelenusSession session) {
     sessions.add(session);
@@ -52,7 +54,8 @@ public final class Helenus {
   }
 
   public static void shutdown() {
-        sessions.forEach((session) -> {
+    sessions.forEach(
+        (session) -> {
           session.close();
           sessions.remove(session);
         });
@@ -79,6 +82,10 @@ public final class Helenus {
     return new SessionInitializer(session);
   }
 
+  public static SessionInitializer init(Session session, String keyspace) {
+    return new SessionInitializer(session, keyspace);
+  }
+
   public static SessionInitializer init(Session session) {
 
     if (session == null) {
@@ -104,7 +111,10 @@ public final class Helenus {
     return dsl(iface, classLoader, Optional.empty(), metadata);
   }
 
-    public static <E> E dsl(Class<E> iface, ClassLoader classLoader, Optional<HelenusPropertyNode> parent,
+  public static <E> E dsl(
+      Class<E> iface,
+      ClassLoader classLoader,
+      Optional<HelenusPropertyNode> parent,
       Metadata metadata) {
 
     Object instance = null;
@@ -123,7 +133,6 @@ public final class Helenus {
         if (c != null) {
           instance = c;
         }
-
       }
     }
 
@@ -139,7 +148,14 @@ public final class Helenus {
   }
 
   public static HelenusEntity entity(Class<?> iface) {
-        return entity(iface, metadataForEntity.get(iface));
+    Metadata metadata = metadataForEntity.get(iface);
+    if (metadata == null) {
+      HelenusSession session = session();
+      if (session != null) {
+        metadata = session.getMetadata();
+      }
+    }
+    return entity(iface, metadata);
   }
 
   public static HelenusEntity entity(Class<?> iface, Metadata metadata) {
@@ -176,12 +192,12 @@ public final class Helenus {
         throw new HelenusMappingException("class is not an interface " + iface);
       }
 
+      if (metadata != null) {
         metadataForEntity.putIfAbsent(iface, metadata);
+      }
       return entity(iface, metadata);
-
     }
 
     throw new HelenusMappingException("unknown dsl object or mapping interface " + ifaceOrDsl);
   }
-
 }

src/main/java/net/helenus/core/HelenusSession.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,73 +16,97 @@
  */
 package net.helenus.core;
 
+import static net.helenus.core.Query.eq;
+
 import com.codahale.metrics.MetricRegistry;
 import com.datastax.driver.core.*;
-import com.github.benmanes.caffeine.cache.Cache;
-import com.github.benmanes.caffeine.cache.Caffeine;
+import com.google.common.collect.Table;
+import java.io.Closeable;
+import java.io.PrintStream;
+import java.util.*;
+import java.util.concurrent.Executor;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import javax.cache.Cache;
+import javax.cache.CacheManager;
+import net.helenus.core.cache.CacheUtil;
+import net.helenus.core.cache.Facet;
+import net.helenus.core.cache.UnboundFacet;
 import net.helenus.core.operation.*;
+import net.helenus.core.reflect.Drafted;
 import net.helenus.core.reflect.HelenusPropertyNode;
-import net.helenus.mapping.ColumnType;
+import net.helenus.core.reflect.MapExportable;
 import net.helenus.mapping.HelenusEntity;
+import net.helenus.mapping.HelenusProperty;
 import net.helenus.mapping.MappingUtil;
 import net.helenus.mapping.value.*;
-import net.helenus.support.Fun;
+import net.helenus.support.*;
 import net.helenus.support.Fun.Tuple1;
 import net.helenus.support.Fun.Tuple2;
 import net.helenus.support.Fun.Tuple6;
 
-import java.io.Closeable;
-import java.io.PrintStream;
-import java.util.Map;
-import java.util.Objects;
-import java.util.concurrent.Executor;
-import java.util.concurrent.TimeUnit;
-import java.util.function.Function;
-
-public final class HelenusSession extends AbstractSessionOperations implements Closeable {
+public class HelenusSession extends AbstractSessionOperations implements Closeable {
+  public static final Object deleted = new Object();
 
   private final Session session;
   private final CodecRegistry registry;
-	private volatile String usingKeyspace;
-	private volatile boolean showCql;
+  private final ConsistencyLevel defaultConsistencyLevel;
+  private final boolean defaultQueryIdempotency;
+  private final MetricRegistry metricRegistry;
   private final PrintStream printStream;
   private final SessionRepository sessionRepository;
   private final Executor executor;
   private final boolean dropSchemaOnClose;
-
+  private final CacheManager cacheManager;
   private final RowColumnValueProvider valueProvider;
   private final StatementColumnValuePreparer valuePreparer;
   private final Metadata metadata;
-	private final MetricRegistry metricRegistry;
-    private final Cache<String, Object> sessionCache;
-	private UnitOfWork currentUnitOfWork;
+  private volatile String usingKeyspace;
+  private volatile boolean showCql;
+  private volatile boolean showValues;
 
-	HelenusSession(Session session, String usingKeyspace, CodecRegistry registry, boolean showCql,
-            PrintStream printStream, SessionRepositoryBuilder sessionRepositoryBuilder, Executor executor,
-            boolean dropSchemaOnClose, MetricRegistry metricRegistry) {
+  HelenusSession(
+      Session session,
+      String usingKeyspace,
+      CodecRegistry registry,
+      boolean showCql,
+      boolean showValues,
+      PrintStream printStream,
+      SessionRepositoryBuilder sessionRepositoryBuilder,
+      Executor executor,
+      boolean dropSchemaOnClose,
+      ConsistencyLevel consistencyLevel,
+      boolean defaultQueryIdempotency,
+      CacheManager cacheManager,
+      MetricRegistry metricRegistry) {
     this.session = session;
     this.registry = registry == null ? CodecRegistry.DEFAULT_INSTANCE : registry;
-		this.usingKeyspace = Objects.requireNonNull(usingKeyspace,
-				"keyspace needs to be selected before creating session");
+    this.usingKeyspace =
+        Objects.requireNonNull(
+            usingKeyspace, "keyspace needs to be selected before creating session");
     this.showCql = showCql;
+    this.showValues = showValues;
     this.printStream = printStream;
-		this.sessionRepository = sessionRepositoryBuilder.build();
+    this.sessionRepository =
+        sessionRepositoryBuilder == null ? null : sessionRepositoryBuilder.build();
     this.executor = executor;
     this.dropSchemaOnClose = dropSchemaOnClose;
+    this.defaultConsistencyLevel = consistencyLevel;
+    this.defaultQueryIdempotency = defaultQueryIdempotency;
+    this.metricRegistry = metricRegistry;
+    this.cacheManager = cacheManager;
 
     this.valueProvider = new RowColumnValueProvider(this.sessionRepository);
     this.valuePreparer = new StatementColumnValuePreparer(this.sessionRepository);
-		this.metadata = session.getCluster().getMetadata();
-        this.currentUnitOfWork = null;
-
-        this.metricRegistry = metricRegistry;
-        Caffeine<Object, Object> cacheBuilder = Caffeine.newBuilder()
-                .expireAfterWrite(5, TimeUnit.MINUTES)
-                .maximumSize(10_000);
-        if (this.metricRegistry != null) {
-            cacheBuilder.recordStats(() -> new MetricsStatsCounter(metricRegistry, "helenus-session-cache"));
+    this.metadata = session == null ? null : session.getCluster().getMetadata();
   }
-        sessionCache = cacheBuilder.build();
+
+  public UnitOfWork begin() {
+    return new UnitOfWork(this).begin();
+  }
+
+  public UnitOfWork begin(UnitOfWork parent) {
+    return new UnitOfWork(this, parent).begin();
   }
 
   @Override
@@ -120,6 +145,20 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     return this;
   }
 
+  public HelenusSession showQueryValuesInLog(boolean showValues) {
+    this.showValues = showValues;
+    return this;
+  }
+
+  public HelenusSession showQueryValuesInLog() {
+    this.showValues = true;
+    return this;
+  }
+
+  public boolean showValues() {
+    return showValues;
+  }
+
   @Override
   public Executor getExecutor() {
     return executor;
@@ -140,64 +179,201 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     return valuePreparer;
   }
 
-    public Metadata getMetadata() { return metadata; }
+  @Override
+  public MetricRegistry getMetricRegistry() {
+    return metricRegistry;
+  }
 
-	public synchronized UnitOfWork begin() {
-		if (currentUnitOfWork == null) {
-			currentUnitOfWork = new UnitOfWork(this);
-			return currentUnitOfWork;
+  @Override
+  public ConsistencyLevel getDefaultConsistencyLevel() {
+    return defaultConsistencyLevel;
+  }
+
+  @Override
+  public boolean getDefaultQueryIdempotency() {
+    return defaultQueryIdempotency;
+  }
+
+  @Override
+  public Object checkCache(String tableName, List<Facet> facets) {
+    Object result = null;
+    if (cacheManager != null) {
+      Cache<String, Object> cache = cacheManager.getCache(tableName);
+      if (cache != null) {
+        for (String key : CacheUtil.flatKeys(tableName, facets)) {
+          result = cache.get(key);
+          if (result != null) {
+            return result;
+          }
+        }
+      }
+    }
+    return null;
+  }
+
+  @Override
+  public void cacheEvict(List<Facet> facets) {
+    if (cacheManager != null) {
+      String tableName = CacheUtil.schemaName(facets);
+      Cache<String, Object> cache = cacheManager.getCache(tableName);
+      if (cache != null) {
+        CacheUtil.flatKeys(tableName, facets).forEach(key -> cache.remove(key));
+      }
+    }
+  }
+
+  @Override
+  public void updateCache(Object pojo, List<Facet> facets) {
+    Map<String, Object> valueMap =
+        pojo instanceof MapExportable ? ((MapExportable) pojo).toMap() : null;
+    List<Facet> boundFacets = new ArrayList<>();
+    for (Facet facet : facets) {
+      if (facet instanceof UnboundFacet) {
+        UnboundFacet unboundFacet = (UnboundFacet) facet;
+        UnboundFacet.Binder binder = unboundFacet.binder();
+        for (HelenusProperty prop : unboundFacet.getProperties()) {
+          Object value;
+          if (valueMap == null) {
+            value = BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+            if (value != null) {
+              binder.setValueForProperty(prop, value.toString());
+            }
           } else {
-			return currentUnitOfWork.begin();
+            value = valueMap.get(prop.getPropertyName());
+            if (value != null) binder.setValueForProperty(prop, value.toString());
+          }
+        }
+        if (binder.isBound()) {
+          boundFacets.add(binder.bind());
+        }
+      } else {
+        boundFacets.add(facet);
+      }
+    }
+    String tableName = CacheUtil.schemaName(facets);
+    List<String[]> facetCombinations = CacheUtil.flattenFacets(boundFacets);
+    replaceCachedFacetValues(pojo, tableName, facetCombinations);
+  }
+
+  @Override
+  public void mergeCache(Table<String, String, Either<Object, List<Facet>>> uowCache) {
+    if (cacheManager != null) {
+      List<Object> items =
+          uowCache
+              .values()
+              .stream()
+              .filter(Either::isLeft)
+              .map(Either::getLeft)
+              .distinct()
+              .collect(Collectors.toList());
+      for (Object pojo : items) {
+        HelenusEntity entity = Helenus.resolve(MappingUtil.getMappingInterface(pojo));
+        Map<String, Object> valueMap =
+            pojo instanceof MapExportable ? ((MapExportable) pojo).toMap() : null;
+        if (entity.isCacheable()) {
+          List<Facet> boundFacets = new ArrayList<>();
+          for (Facet facet : entity.getFacets()) {
+            if (facet instanceof UnboundFacet) {
+              UnboundFacet unboundFacet = (UnboundFacet) facet;
+              UnboundFacet.Binder binder = unboundFacet.binder();
+              unboundFacet
+                  .getProperties()
+                  .forEach(
+                      prop -> {
+                        if (valueMap == null) {
+                          Object value =
+                              BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop);
+                          binder.setValueForProperty(prop, value.toString());
+                        } else {
+                          Object v = valueMap.get(prop.getPropertyName());
+                          if (v != null) {
+                            binder.setValueForProperty(prop, v.toString());
+                          }
+                        }
+                      });
+              if (binder.isBound()) {
+                boundFacets.add(binder.bind());
+              }
+            } else {
+              boundFacets.add(facet);
+            }
+          }
+          List<String[]> facetCombinations = CacheUtil.flattenFacets(boundFacets);
+          String tableName = CacheUtil.schemaName(boundFacets);
+          replaceCachedFacetValues(pojo, tableName, facetCombinations);
         }
       }
 
-	public synchronized void commit() throws ConflictingUnitOfWorkException {
-        if (currentUnitOfWork != null) {
-            currentUnitOfWork.commit();
-            currentUnitOfWork = null;
+      List<List<Facet>> deletedFacetSets =
+          uowCache
+              .values()
+              .stream()
+              .filter(Either::isRight)
+              .map(Either::getRight)
+              .collect(Collectors.toList());
+      for (List<Facet> facets : deletedFacetSets) {
+        String tableName = CacheUtil.schemaName(facets);
+        Cache<String, Object> cache = cacheManager.getCache(tableName);
+        if (cache != null) {
+          List<String> keys = CacheUtil.flatKeys(tableName, facets);
+          keys.forEach(key -> cache.remove(key));
+        }
+      }
     }
   }
 
-	public synchronized void abort() {
-        if (currentUnitOfWork != null) {
-            currentUnitOfWork.abort();
-            currentUnitOfWork = null;
+  private void replaceCachedFacetValues(
+      Object pojo, String tableName, List<String[]> facetCombinations) {
+    if (cacheManager != null) {
+      for (String[] combination : facetCombinations) {
+        String cacheKey = tableName + "." + Arrays.toString(combination);
+        Cache<String, Object> cache = cacheManager.getCache(tableName);
+        if (cache != null) {
+          if (pojo == null || pojo == HelenusSession.deleted) {
+            cache.remove(cacheKey);
+          } else {
+            cache.put(cacheKey, pojo);
+          }
+        }
+      }
     }
   }
 
-	public void cache(String key, Object value) {
-        sessionCache.put(key, value);
+  public CacheManager getCacheManager() {
+    return cacheManager;
   }
 
-	public Object fetch(String key) {
-        return sessionCache.getIfPresent(key);
+  public Metadata getMetadata() {
+    return metadata;
+  }
+
+  public <E> SelectOperation<E> select(E pojo) {
+    Objects.requireNonNull(
+        pojo, "supplied object must be a dsl for a registered entity but cannot be null");
+    ColumnValueProvider valueProvider = getValueProvider();
+    HelenusEntity entity = Helenus.resolve(pojo);
+    Class<?> entityClass = entity.getMappingInterface();
+
+    return new SelectOperation<E>(
+        this,
+        entity,
+        (r) -> {
+          Map<String, Object> map = new ValueProviderMap(r, valueProvider, entity);
+          return (E) Helenus.map(entityClass, map);
+        });
   }
 
   public <E> SelectOperation<E> select(Class<E> entityClass) {
-
     Objects.requireNonNull(entityClass, "entityClass is empty");
     ColumnValueProvider valueProvider = getValueProvider();
     HelenusEntity entity = Helenus.entity(entityClass);
 
-		return new SelectOperation<E>(this, entity, (r) -> {
-
+    return new SelectOperation<E>(
+        this,
+        entity,
+        (r) -> {
           Map<String, Object> map = new ValueProviderMap(r, valueProvider, entity);
-			E pojo = (E) Helenus.map(entityClass, map);
-			if (entity.isCacheable()) {
-			    StringBuilder cacheKey = new StringBuilder();
-                entity.getOrderedProperties().stream().forEach(property -> {
-                    ColumnType ct = property.getColumnType();
-                    switch (ct) {
-                    case PARTITION_KEY:
-                    case CLUSTERING_COLUMN:
-                        cacheKey.append(map.get(property.getPropertyName()).toString());
-                        break;
-                    }
-                });
-			    cache(cacheKey.toString(), pojo);
-            }
-			return pojo;
-
+          return (E) Helenus.map(entityClass, map);
         });
   }
 
@@ -205,9 +381,24 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     return new SelectOperation<Fun.ArrayTuple>(this);
   }
 
-	public SelectOperation<Row> selectAll(Class<?> entityClass) {
+  public <E> SelectOperation<E> selectAll(Class<E> entityClass) {
     Objects.requireNonNull(entityClass, "entityClass is empty");
-		return new SelectOperation<Row>(this, Helenus.entity(entityClass));
+    HelenusEntity entity = Helenus.entity(entityClass);
+
+    return new SelectOperation<E>(
+        this,
+        entity,
+        (r) -> {
+          Map<String, Object> map = new ValueProviderMap(r, valueProvider, entity);
+          return (E) Helenus.map(entityClass, map);
+        });
+  }
+
+  public <E> SelectOperation<Row> selectAll(E pojo) {
+    Objects.requireNonNull(
+        pojo, "supplied object must be a dsl for a registered entity but cannot be null");
+    HelenusEntity entity = Helenus.resolve(pojo);
+    return new SelectOperation<Row>(this, entity);
   }
 
   public <E> SelectOperation<E> selectAll(Class<E> entityClass, Function<Row, E> rowMapper) {
@@ -220,7 +411,8 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     Objects.requireNonNull(getter1, "field 1 is empty");
 
     HelenusPropertyNode p1 = MappingUtil.resolveMappingProperty(getter1);
-		return new SelectOperation<Tuple1<V1>>(this, new Mappers.Mapper1<V1>(getValueProvider(), p1), p1);
+    return new SelectOperation<Tuple1<V1>>(
+        this, new Mappers.Mapper1<V1>(getValueProvider(), p1), p1);
   }
 
   public <V1, V2> SelectOperation<Tuple2<V1, V2>> select(Getter<V1> getter1, Getter<V2> getter2) {
@@ -229,12 +421,12 @@ public final class HelenusSession extends AbstractSessionOperations implements C
 
     HelenusPropertyNode p1 = MappingUtil.resolveMappingProperty(getter1);
     HelenusPropertyNode p2 = MappingUtil.resolveMappingProperty(getter2);
-		return new SelectOperation<Fun.Tuple2<V1, V2>>(this, new Mappers.Mapper2<V1, V2>(getValueProvider(), p1, p2),
-				p1, p2);
+    return new SelectOperation<Fun.Tuple2<V1, V2>>(
+        this, new Mappers.Mapper2<V1, V2>(getValueProvider(), p1, p2), p1, p2);
   }
 
-	public <V1, V2, V3> SelectOperation<Fun.Tuple3<V1, V2, V3>> select(Getter<V1> getter1, Getter<V2> getter2,
-			Getter<V3> getter3) {
+  public <V1, V2, V3> SelectOperation<Fun.Tuple3<V1, V2, V3>> select(
+      Getter<V1> getter1, Getter<V2> getter2, Getter<V3> getter3) {
     Objects.requireNonNull(getter1, "field 1 is empty");
     Objects.requireNonNull(getter2, "field 2 is empty");
     Objects.requireNonNull(getter3, "field 3 is empty");
@@ -242,12 +434,12 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     HelenusPropertyNode p1 = MappingUtil.resolveMappingProperty(getter1);
     HelenusPropertyNode p2 = MappingUtil.resolveMappingProperty(getter2);
     HelenusPropertyNode p3 = MappingUtil.resolveMappingProperty(getter3);
-		return new SelectOperation<Fun.Tuple3<V1, V2, V3>>(this,
-				new Mappers.Mapper3<V1, V2, V3>(getValueProvider(), p1, p2, p3), p1, p2, p3);
+    return new SelectOperation<Fun.Tuple3<V1, V2, V3>>(
+        this, new Mappers.Mapper3<V1, V2, V3>(getValueProvider(), p1, p2, p3), p1, p2, p3);
   }
 
-	public <V1, V2, V3, V4> SelectOperation<Fun.Tuple4<V1, V2, V3, V4>> select(Getter<V1> getter1, Getter<V2> getter2,
-			Getter<V3> getter3, Getter<V4> getter4) {
+  public <V1, V2, V3, V4> SelectOperation<Fun.Tuple4<V1, V2, V3, V4>> select(
+      Getter<V1> getter1, Getter<V2> getter2, Getter<V3> getter3, Getter<V4> getter4) {
     Objects.requireNonNull(getter1, "field 1 is empty");
     Objects.requireNonNull(getter2, "field 2 is empty");
     Objects.requireNonNull(getter3, "field 3 is empty");
@@ -257,12 +449,21 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     HelenusPropertyNode p2 = MappingUtil.resolveMappingProperty(getter2);
     HelenusPropertyNode p3 = MappingUtil.resolveMappingProperty(getter3);
     HelenusPropertyNode p4 = MappingUtil.resolveMappingProperty(getter4);
-		return new SelectOperation<Fun.Tuple4<V1, V2, V3, V4>>(this,
-				new Mappers.Mapper4<V1, V2, V3, V4>(getValueProvider(), p1, p2, p3, p4), p1, p2, p3, p4);
+    return new SelectOperation<Fun.Tuple4<V1, V2, V3, V4>>(
+        this,
+        new Mappers.Mapper4<V1, V2, V3, V4>(getValueProvider(), p1, p2, p3, p4),
+        p1,
+        p2,
+        p3,
+        p4);
   }
 
-	public <V1, V2, V3, V4, V5> SelectOperation<Fun.Tuple5<V1, V2, V3, V4, V5>> select(Getter<V1> getter1,
-			Getter<V2> getter2, Getter<V3> getter3, Getter<V4> getter4, Getter<V5> getter5) {
+  public <V1, V2, V3, V4, V5> SelectOperation<Fun.Tuple5<V1, V2, V3, V4, V5>> select(
+      Getter<V1> getter1,
+      Getter<V2> getter2,
+      Getter<V3> getter3,
+      Getter<V4> getter4,
+      Getter<V5> getter5) {
     Objects.requireNonNull(getter1, "field 1 is empty");
     Objects.requireNonNull(getter2, "field 2 is empty");
     Objects.requireNonNull(getter3, "field 3 is empty");
@@ -274,12 +475,23 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     HelenusPropertyNode p3 = MappingUtil.resolveMappingProperty(getter3);
     HelenusPropertyNode p4 = MappingUtil.resolveMappingProperty(getter4);
     HelenusPropertyNode p5 = MappingUtil.resolveMappingProperty(getter5);
-		return new SelectOperation<Fun.Tuple5<V1, V2, V3, V4, V5>>(this,
-				new Mappers.Mapper5<V1, V2, V3, V4, V5>(getValueProvider(), p1, p2, p3, p4, p5), p1, p2, p3, p4, p5);
+    return new SelectOperation<Fun.Tuple5<V1, V2, V3, V4, V5>>(
+        this,
+        new Mappers.Mapper5<V1, V2, V3, V4, V5>(getValueProvider(), p1, p2, p3, p4, p5),
+        p1,
+        p2,
+        p3,
+        p4,
+        p5);
   }
 
-	public <V1, V2, V3, V4, V5, V6> SelectOperation<Fun.Tuple6<V1, V2, V3, V4, V5, V6>> select(Getter<V1> getter1,
-			Getter<V2> getter2, Getter<V3> getter3, Getter<V4> getter4, Getter<V5> getter5, Getter<V6> getter6) {
+  public <V1, V2, V3, V4, V5, V6> SelectOperation<Fun.Tuple6<V1, V2, V3, V4, V5, V6>> select(
+      Getter<V1> getter1,
+      Getter<V2> getter2,
+      Getter<V3> getter3,
+      Getter<V4> getter4,
+      Getter<V5> getter5,
+      Getter<V6> getter6) {
     Objects.requireNonNull(getter1, "field 1 is empty");
     Objects.requireNonNull(getter2, "field 2 is empty");
     Objects.requireNonNull(getter3, "field 3 is empty");
@@ -293,14 +505,26 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     HelenusPropertyNode p4 = MappingUtil.resolveMappingProperty(getter4);
     HelenusPropertyNode p5 = MappingUtil.resolveMappingProperty(getter5);
     HelenusPropertyNode p6 = MappingUtil.resolveMappingProperty(getter6);
-		return new SelectOperation<Tuple6<V1, V2, V3, V4, V5, V6>>(this,
-				new Mappers.Mapper6<V1, V2, V3, V4, V5, V6>(getValueProvider(), p1, p2, p3, p4, p5, p6), p1, p2, p3, p4,
-				p5, p6);
+    return new SelectOperation<Tuple6<V1, V2, V3, V4, V5, V6>>(
+        this,
+        new Mappers.Mapper6<V1, V2, V3, V4, V5, V6>(getValueProvider(), p1, p2, p3, p4, p5, p6),
+        p1,
+        p2,
+        p3,
+        p4,
+        p5,
+        p6);
   }
 
-	public <V1, V2, V3, V4, V5, V6, V7> SelectOperation<Fun.Tuple7<V1, V2, V3, V4, V5, V6, V7>> select(
-			Getter<V1> getter1, Getter<V2> getter2, Getter<V3> getter3, Getter<V4> getter4, Getter<V5> getter5,
-			Getter<V6> getter6, Getter<V7> getter7) {
+  public <V1, V2, V3, V4, V5, V6, V7>
+      SelectOperation<Fun.Tuple7<V1, V2, V3, V4, V5, V6, V7>> select(
+          Getter<V1> getter1,
+          Getter<V2> getter2,
+          Getter<V3> getter3,
+          Getter<V4> getter4,
+          Getter<V5> getter5,
+          Getter<V6> getter6,
+          Getter<V7> getter7) {
     Objects.requireNonNull(getter1, "field 1 is empty");
     Objects.requireNonNull(getter2, "field 2 is empty");
     Objects.requireNonNull(getter3, "field 3 is empty");
@@ -316,9 +540,17 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     HelenusPropertyNode p5 = MappingUtil.resolveMappingProperty(getter5);
     HelenusPropertyNode p6 = MappingUtil.resolveMappingProperty(getter6);
     HelenusPropertyNode p7 = MappingUtil.resolveMappingProperty(getter7);
-		return new SelectOperation<Fun.Tuple7<V1, V2, V3, V4, V5, V6, V7>>(this,
-				new Mappers.Mapper7<V1, V2, V3, V4, V5, V6, V7>(getValueProvider(), p1, p2, p3, p4, p5, p6, p7), p1, p2,
-				p3, p4, p5, p6, p7);
+    return new SelectOperation<Fun.Tuple7<V1, V2, V3, V4, V5, V6, V7>>(
+        this,
+        new Mappers.Mapper7<V1, V2, V3, V4, V5, V6, V7>(
+            getValueProvider(), p1, p2, p3, p4, p5, p6, p7),
+        p1,
+        p2,
+        p3,
+        p4,
+        p5,
+        p6,
+        p7);
   }
 
   public CountOperation count() {
@@ -330,43 +562,162 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     return new CountOperation(this, Helenus.resolve(dsl));
   }
 
-	public <V> UpdateOperation update() {
-		return new UpdateOperation(this);
+  public UpdateOperation<ResultSet> update() {
+    return new UpdateOperation<ResultSet>(this);
   }
 
-	public <V> UpdateOperation update(Getter<V> getter, V v) {
+  public <E> UpdateOperation<E> update(Object pojo) {
+    if (pojo instanceof MapExportable == false) {
+      throw new HelenusMappingException(
+          "update of objects that don't implement MapExportable is not yet supported");
+    }
+    return new UpdateOperation<E>(this, pojo);
+  }
+
+  public <E> UpdateOperation<E> update(Drafted<E> drafted) {
+    if (drafted instanceof AbstractEntityDraft == false) {
+      throw new HelenusMappingException(
+          "update of draft objects that don't inherit from AbstractEntityDraft is not yet supported");
+    }
+    AbstractEntityDraft<E> draft = (AbstractEntityDraft<E>) drafted;
+    UpdateOperation update = new UpdateOperation<E>(this, draft);
+    Map<String, Object> map = draft.toMap();
+    Set<String> mutatedProperties = draft.mutated();
+    HelenusEntity entity = Helenus.entity(draft.getEntityClass());
+
+    // Add all the mutated values contained in the draft.
+    entity
+        .getOrderedProperties()
+        .forEach(
+            property -> {
+              switch (property.getColumnType()) {
+                case PARTITION_KEY:
+                case CLUSTERING_COLUMN:
+                  break;
+                default:
+                  String propertyName = property.getPropertyName();
+                  if (mutatedProperties.contains(propertyName)) {
+                    Object value = map.get(propertyName);
+                    Getter<Object> getter =
+                        new Getter<Object>() {
+                          @Override
+                          public Object get() {
+                            throw new DslPropertyException(
+                                new HelenusPropertyNode(property, Optional.empty()));
+                          }
+                        };
+                    update.set(getter, value);
+                  }
+              }
+            });
+
+    // Add the partition and clustering keys if they were in the draft (normally the
+    // case).
+    entity
+        .getOrderedProperties()
+        .forEach(
+            property -> {
+              switch (property.getColumnType()) {
+                case PARTITION_KEY:
+                case CLUSTERING_COLUMN:
+                  String propertyName = property.getPropertyName();
+                  Object value = map.get(propertyName);
+                  Getter<Object> getter =
+                      new Getter<Object>() {
+                        @Override
+                        public Object get() {
+                          throw new DslPropertyException(
+                              new HelenusPropertyNode(property, Optional.empty()));
+                        }
+                      };
+                  update.where(getter, eq(value));
+              }
+            });
+
+    return update;
+  }
+
+  public <V> UpdateOperation<ResultSet> update(Getter<V> getter, V v) {
     Objects.requireNonNull(getter, "field is empty");
     Objects.requireNonNull(v, "value is empty");
 
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(getter);
 
-		return new UpdateOperation(this, p, v);
+    return new UpdateOperation<ResultSet>(this, p, v);
   }
 
-	public InsertOperation insert() {
-		return new InsertOperation(this, true);
+  public InsertOperation<ResultSet> insert() {
+    return new InsertOperation<ResultSet>(this, true);
   }
 
-	public InsertOperation insert(Object pojo) {
+  public <T> InsertOperation<T> insert(Class<?> resultType) {
+    return new InsertOperation<T>(this, resultType, true);
+  }
+
+  public <T> InsertOperation<T> insert(T pojo) {
+    Objects.requireNonNull(
+        pojo,
+        "supplied object must be either an instance of the entity class or a dsl for it, but cannot be null");
+    HelenusEntity entity = null;
+    try {
+      entity = Helenus.resolve(pojo);
+    } catch (HelenusMappingException e) {
+    }
+    if (entity != null) {
+      return new InsertOperation<T>(this, entity, entity.getMappingInterface(), true);
+    } else {
+      return this.<T>insert(pojo, null, null);
+    }
+  }
+
+  public <T> InsertOperation<T> insert(Drafted draft) {
+    return insert(draft.build(), draft.mutated(), draft.read());
+  }
+
+  private <T> InsertOperation<T> insert(T pojo, Set<String> mutations, Set<String> read) {
     Objects.requireNonNull(pojo, "pojo is empty");
 
     Class<?> iface = MappingUtil.getMappingInterface(pojo);
     HelenusEntity entity = Helenus.entity(iface);
 
-		return new InsertOperation(this, entity, pojo, true);
+    return new InsertOperation<T>(this, entity, pojo, mutations, read, true);
   }
 
-	public InsertOperation upsert() {
-		return new InsertOperation(this, false);
+  public InsertOperation<ResultSet> upsert() {
+    return new InsertOperation<ResultSet>(this, false);
   }
 
-	public InsertOperation upsert(Object pojo) {
+  public <T> InsertOperation<T> upsert(Class<?> resultType) {
+    return new InsertOperation<T>(this, resultType, false);
+  }
+
+  public <T> InsertOperation<T> upsert(Drafted draft) {
+    return this.<T>upsert((T) draft.build(), draft.mutated(), draft.read());
+  }
+
+  public <T> InsertOperation<T> upsert(T pojo) {
+    Objects.requireNonNull(
+        pojo,
+        "supplied object must be either an instance of the entity class or a dsl for it, but cannot be null");
+    HelenusEntity entity = null;
+    try {
+      entity = Helenus.resolve(pojo);
+    } catch (HelenusMappingException e) {
+    }
+    if (entity != null) {
+      return new InsertOperation<T>(this, entity, entity.getMappingInterface(), false);
+    } else {
+      return this.<T>upsert(pojo, null, null);
+    }
+  }
+
+  private <T> InsertOperation<T> upsert(T pojo, Set<String> mutations, Set<String> read) {
     Objects.requireNonNull(pojo, "pojo is empty");
 
     Class<?> iface = MappingUtil.getMappingInterface(pojo);
     HelenusEntity entity = Helenus.entity(iface);
 
-		return new InsertOperation(this, entity, pojo, false);
+    return new InsertOperation<T>(this, entity, pojo, mutations, read, false);
   }
 
   public DeleteOperation delete() {
@@ -382,7 +733,14 @@ public final class HelenusSession extends AbstractSessionOperations implements C
     return session;
   }
 
+  public <E> E dsl(Class<E> iface) {
+    return Helenus.dsl(iface, getMetadata());
+  }
+
   public void close() {
+    if (session == null) {
+      return;
+    }
 
     if (session.isClosed()) {
       return;
@@ -407,23 +765,21 @@ public final class HelenusSession extends AbstractSessionOperations implements C
   private void dropSchema() {
 
     sessionRepository.entities().forEach(e -> dropEntity(e));
-
   }
 
   private void dropEntity(HelenusEntity entity) {
 
     switch (entity.getType()) {
-
-			case TABLE :
-				execute(SchemaUtil.dropTable(entity), true);
+      case TABLE:
+        execute(SchemaUtil.dropTable(entity));
         break;
 
-			case UDT :
-				execute(SchemaUtil.dropUserType(entity), true);
+      case UDT:
+        execute(SchemaUtil.dropUserType(entity));
         break;
 
+      default:
+        throw new HelenusException("Unknown entity type.");
     }
-
   }
-
 }

src/main/java/net/helenus/core/HelenusValidator.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -16,15 +17,12 @@
 package net.helenus.core;
 
 import java.lang.annotation.Annotation;
-
 import javax.validation.ConstraintValidator;
-
 import net.helenus.mapping.HelenusProperty;
 import net.helenus.support.HelenusException;
 import net.helenus.support.HelenusMappingException;
 
 public enum HelenusValidator implements PropertyValueValidator {
-
   INSTANCE;
 
   public void validate(HelenusProperty prop, Object value) {
@@ -38,14 +36,13 @@ public enum HelenusValidator implements PropertyValueValidator {
       try {
         valid = typeless.isValid(value, null);
       } catch (ClassCastException e) {
-				throw new HelenusMappingException("validator was used for wrong type '" + value + "' in " + prop, e);
+        throw new HelenusMappingException(
+            "validator was used for wrong type '" + value + "' in " + prop, e);
       }
 
       if (!valid) {
         throw new HelenusException("wrong value '" + value + "' for " + prop);
       }
     }
-
   }
-
 }

src/main/java/net/helenus/core/MapperInstantiator.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -20,5 +21,4 @@ import java.util.Map;
 public interface MapperInstantiator {
 
   <E> E instantiate(Class<E> iface, Map<String, Object> src, ClassLoader classLoader);
-
 }

src/main/java/net/helenus/core/Mappers.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,10 +16,8 @@
  */
 package net.helenus.core;
 
-import java.util.function.Function;
-
 import com.datastax.driver.core.Row;
-
+import java.util.function.Function;
 import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.mapping.HelenusProperty;
 import net.helenus.mapping.value.ColumnValueProvider;
@@ -26,10 +25,9 @@ import net.helenus.support.Fun;
 
 public final class Mappers {
 
-	private Mappers() {
-	}
+  private Mappers() {}
 
-	public final static class Mapper1<A> implements Function<Row, Fun.Tuple1<A>> {
+  public static final class Mapper1<A> implements Function<Row, Fun.Tuple1<A>> {
 
     private final ColumnValueProvider provider;
     private final HelenusProperty p1;
@@ -45,7 +43,7 @@ public final class Mappers {
     }
   }
 
-	public final static class Mapper2<A, B> implements Function<Row, Fun.Tuple2<A, B>> {
+  public static final class Mapper2<A, B> implements Function<Row, Fun.Tuple2<A, B>> {
 
     private final ColumnValueProvider provider;
     private final HelenusProperty p1;
@@ -59,18 +57,22 @@ public final class Mappers {
 
     @Override
     public Fun.Tuple2<A, B> apply(Row row) {
-			return new Fun.Tuple2<A, B>(provider.getColumnValue(row, 0, p1), provider.getColumnValue(row, 1, p2));
+      return new Fun.Tuple2<A, B>(
+          provider.getColumnValue(row, 0, p1), provider.getColumnValue(row, 1, p2));
     }
   }
 
-	public final static class Mapper3<A, B, C> implements Function<Row, Fun.Tuple3<A, B, C>> {
+  public static final class Mapper3<A, B, C> implements Function<Row, Fun.Tuple3<A, B, C>> {
 
     private final ColumnValueProvider provider;
     private final HelenusProperty p1;
     private final HelenusProperty p2;
     private final HelenusProperty p3;
 
-		public Mapper3(ColumnValueProvider provider, HelenusPropertyNode p1, HelenusPropertyNode p2,
+    public Mapper3(
+        ColumnValueProvider provider,
+        HelenusPropertyNode p1,
+        HelenusPropertyNode p2,
         HelenusPropertyNode p3) {
       this.provider = provider;
       this.p1 = p1.getProperty();
@@ -80,12 +82,14 @@ public final class Mappers {
 
     @Override
     public Fun.Tuple3<A, B, C> apply(Row row) {
-			return new Fun.Tuple3<A, B, C>(provider.getColumnValue(row, 0, p1), provider.getColumnValue(row, 1, p2),
+      return new Fun.Tuple3<A, B, C>(
+          provider.getColumnValue(row, 0, p1),
+          provider.getColumnValue(row, 1, p2),
           provider.getColumnValue(row, 2, p3));
     }
   }
 
-	public final static class Mapper4<A, B, C, D> implements Function<Row, Fun.Tuple4<A, B, C, D>> {
+  public static final class Mapper4<A, B, C, D> implements Function<Row, Fun.Tuple4<A, B, C, D>> {
 
     private final ColumnValueProvider provider;
     private final HelenusProperty p1;
@@ -93,8 +97,12 @@ public final class Mappers {
     private final HelenusProperty p3;
     private final HelenusProperty p4;
 
-		public Mapper4(ColumnValueProvider provider, HelenusPropertyNode p1, HelenusPropertyNode p2,
-				HelenusPropertyNode p3, HelenusPropertyNode p4) {
+    public Mapper4(
+        ColumnValueProvider provider,
+        HelenusPropertyNode p1,
+        HelenusPropertyNode p2,
+        HelenusPropertyNode p3,
+        HelenusPropertyNode p4) {
       this.provider = provider;
       this.p1 = p1.getProperty();
       this.p2 = p2.getProperty();
@@ -104,18 +112,27 @@ public final class Mappers {
 
     @Override
     public Fun.Tuple4<A, B, C, D> apply(Row row) {
-			return new Fun.Tuple4<A, B, C, D>(provider.getColumnValue(row, 0, p1), provider.getColumnValue(row, 1, p2),
-					provider.getColumnValue(row, 2, p3), provider.getColumnValue(row, 3, p4));
+      return new Fun.Tuple4<A, B, C, D>(
+          provider.getColumnValue(row, 0, p1),
+          provider.getColumnValue(row, 1, p2),
+          provider.getColumnValue(row, 2, p3),
+          provider.getColumnValue(row, 3, p4));
     }
   }
 
-	public final static class Mapper5<A, B, C, D, E> implements Function<Row, Fun.Tuple5<A, B, C, D, E>> {
+  public static final class Mapper5<A, B, C, D, E>
+      implements Function<Row, Fun.Tuple5<A, B, C, D, E>> {
 
     private final ColumnValueProvider provider;
     private final HelenusProperty p1, p2, p3, p4, p5;
 
-		public Mapper5(ColumnValueProvider provider, HelenusPropertyNode p1, HelenusPropertyNode p2,
-				HelenusPropertyNode p3, HelenusPropertyNode p4, HelenusPropertyNode p5) {
+    public Mapper5(
+        ColumnValueProvider provider,
+        HelenusPropertyNode p1,
+        HelenusPropertyNode p2,
+        HelenusPropertyNode p3,
+        HelenusPropertyNode p4,
+        HelenusPropertyNode p5) {
       this.provider = provider;
       this.p1 = p1.getProperty();
       this.p2 = p2.getProperty();
@@ -126,19 +143,29 @@ public final class Mappers {
 
     @Override
     public Fun.Tuple5<A, B, C, D, E> apply(Row row) {
-			return new Fun.Tuple5<A, B, C, D, E>(provider.getColumnValue(row, 0, p1),
-					provider.getColumnValue(row, 1, p2), provider.getColumnValue(row, 2, p3),
-					provider.getColumnValue(row, 3, p4), provider.getColumnValue(row, 4, p5));
+      return new Fun.Tuple5<A, B, C, D, E>(
+          provider.getColumnValue(row, 0, p1),
+          provider.getColumnValue(row, 1, p2),
+          provider.getColumnValue(row, 2, p3),
+          provider.getColumnValue(row, 3, p4),
+          provider.getColumnValue(row, 4, p5));
     }
   }
 
-	public final static class Mapper6<A, B, C, D, E, F> implements Function<Row, Fun.Tuple6<A, B, C, D, E, F>> {
+  public static final class Mapper6<A, B, C, D, E, F>
+      implements Function<Row, Fun.Tuple6<A, B, C, D, E, F>> {
 
     private final ColumnValueProvider provider;
     private final HelenusProperty p1, p2, p3, p4, p5, p6;
 
-		public Mapper6(ColumnValueProvider provider, HelenusPropertyNode p1, HelenusPropertyNode p2,
-				HelenusPropertyNode p3, HelenusPropertyNode p4, HelenusPropertyNode p5, HelenusPropertyNode p6) {
+    public Mapper6(
+        ColumnValueProvider provider,
+        HelenusPropertyNode p1,
+        HelenusPropertyNode p2,
+        HelenusPropertyNode p3,
+        HelenusPropertyNode p4,
+        HelenusPropertyNode p5,
+        HelenusPropertyNode p6) {
       this.provider = provider;
       this.p1 = p1.getProperty();
       this.p2 = p2.getProperty();
@@ -150,20 +177,30 @@ public final class Mappers {
 
     @Override
     public Fun.Tuple6<A, B, C, D, E, F> apply(Row row) {
-			return new Fun.Tuple6<A, B, C, D, E, F>(provider.getColumnValue(row, 0, p1),
-					provider.getColumnValue(row, 1, p2), provider.getColumnValue(row, 2, p3),
-					provider.getColumnValue(row, 3, p4), provider.getColumnValue(row, 4, p5),
+      return new Fun.Tuple6<A, B, C, D, E, F>(
+          provider.getColumnValue(row, 0, p1),
+          provider.getColumnValue(row, 1, p2),
+          provider.getColumnValue(row, 2, p3),
+          provider.getColumnValue(row, 3, p4),
+          provider.getColumnValue(row, 4, p5),
           provider.getColumnValue(row, 5, p6));
     }
   }
 
-	public final static class Mapper7<A, B, C, D, E, F, G> implements Function<Row, Fun.Tuple7<A, B, C, D, E, F, G>> {
+  public static final class Mapper7<A, B, C, D, E, F, G>
+      implements Function<Row, Fun.Tuple7<A, B, C, D, E, F, G>> {
 
     private final ColumnValueProvider provider;
     private final HelenusProperty p1, p2, p3, p4, p5, p6, p7;
 
-		public Mapper7(ColumnValueProvider provider, HelenusPropertyNode p1, HelenusPropertyNode p2,
-				HelenusPropertyNode p3, HelenusPropertyNode p4, HelenusPropertyNode p5, HelenusPropertyNode p6,
+    public Mapper7(
+        ColumnValueProvider provider,
+        HelenusPropertyNode p1,
+        HelenusPropertyNode p2,
+        HelenusPropertyNode p3,
+        HelenusPropertyNode p4,
+        HelenusPropertyNode p5,
+        HelenusPropertyNode p6,
         HelenusPropertyNode p7) {
       this.provider = provider;
       this.p1 = p1.getProperty();
@@ -177,11 +214,14 @@ public final class Mappers {
 
     @Override
     public Fun.Tuple7<A, B, C, D, E, F, G> apply(Row row) {
-			return new Fun.Tuple7<A, B, C, D, E, F, G>(provider.getColumnValue(row, 0, p1),
-					provider.getColumnValue(row, 1, p2), provider.getColumnValue(row, 2, p3),
-					provider.getColumnValue(row, 3, p4), provider.getColumnValue(row, 4, p5),
-					provider.getColumnValue(row, 5, p6), provider.getColumnValue(row, 6, p7));
+      return new Fun.Tuple7<A, B, C, D, E, F, G>(
+          provider.getColumnValue(row, 0, p1),
+          provider.getColumnValue(row, 1, p2),
+          provider.getColumnValue(row, 2, p3),
+          provider.getColumnValue(row, 3, p4),
+          provider.getColumnValue(row, 4, p5),
+          provider.getColumnValue(row, 5, p6),
+          provider.getColumnValue(row, 6, p7));
     }
   }
-
 }

src/main/java/net/helenus/core/MetricsStatsCounter.java

@@ -1,109 +0,0 @@
-/*
- * Copyright 2016 Ben Manes. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package net.helenus.core;
-
-import static java.util.Objects.requireNonNull;
-
-import java.util.concurrent.TimeUnit;
-
-import com.codahale.metrics.Meter;
-import com.codahale.metrics.MetricRegistry;
-import com.codahale.metrics.Timer;
-import com.github.benmanes.caffeine.cache.stats.CacheStats;
-import com.github.benmanes.caffeine.cache.stats.StatsCounter;
-
-/**
- * A {@link StatsCounter} instrumented with Dropwizard Metrics.
- *
- * @author ben.manes@gmail.com (Ben Manes)
- */
-public final class MetricsStatsCounter implements StatsCounter {
-    private final Meter hitCount;
-    private final Meter missCount;
-    private final Meter loadSuccessCount;
-    private final Meter loadFailureCount;
-    private final Timer totalLoadTime;
-    private final Meter evictionCount;
-    private final Meter evictionWeight;
-
-    /**
-     * Constructs an instance for use by a single cache.
-     *
-     * @param registry the registry of metric instances
-     * @param metricsPrefix the prefix name for the metrics
-     */
-    public MetricsStatsCounter(MetricRegistry registry, String metricsPrefix) {
-        requireNonNull(metricsPrefix);
-        hitCount = registry.meter(metricsPrefix + ".hits");
-        missCount = registry.meter(metricsPrefix + ".misses");
-        totalLoadTime = registry.timer(metricsPrefix + ".loads");
-        loadSuccessCount = registry.meter(metricsPrefix + ".loads-success");
-        loadFailureCount = registry.meter(metricsPrefix + ".loads-failure");
-        evictionCount = registry.meter(metricsPrefix + ".evictions");
-        evictionWeight = registry.meter(metricsPrefix + ".evictions-weight");
-    }
-
-    @Override
-    public void recordHits(int count) {
-        hitCount.mark(count);
-    }
-
-    @Override
-    public void recordMisses(int count) {
-        missCount.mark(count);
-    }
-
-    @Override
-    public void recordLoadSuccess(long loadTime) {
-        loadSuccessCount.mark();
-        totalLoadTime.update(loadTime, TimeUnit.NANOSECONDS);
-    }
-
-    @Override
-    public void recordLoadFailure(long loadTime) {
-        loadFailureCount.mark();
-        totalLoadTime.update(loadTime, TimeUnit.NANOSECONDS);
-    }
-
-    @Override
-    public void recordEviction() {
-        // This method is scheduled for removal in version 3.0 in favor of recordEviction(weight)
-        recordEviction(1);
-    }
-
-    @Override
-    public void recordEviction(int weight) {
-        evictionCount.mark();
-        evictionWeight.mark(weight);
-    }
-
-    @Override
-    public CacheStats snapshot() {
-        return new CacheStats(
-                hitCount.getCount(),
-                missCount.getCount(),
-                loadSuccessCount.getCount(),
-                loadFailureCount.getCount(),
-                totalLoadTime.getCount(),
-                evictionCount.getCount(),
-                evictionWeight.getCount());
-    }
-
-    @Override
-    public String toString() {
-        return snapshot().toString();
-    }
-}

src/main/java/net/helenus/core/Operator.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -19,7 +20,6 @@ import java.util.HashMap;
 import java.util.Map;
 
 public enum Operator {
-
   EQ("=="),
 
   IN("in"),
@@ -32,9 +32,7 @@ public enum Operator {
 
   LTE("<=");
 
-	private final String name;
-
-	private final static Map<String, Operator> indexByName = new HashMap<String, Operator>();
+  private static final Map<String, Operator> indexByName = new HashMap<String, Operator>();
 
   static {
     for (Operator fo : Operator.values()) {
@@ -42,16 +40,17 @@ public enum Operator {
     }
   }
 
+  private final String name;
+
   private Operator(String name) {
     this.name = name;
   }
 
-	public String getName() {
-		return name;
-	}
-
   public static Operator findByOperator(String name) {
     return indexByName.get(name);
   }
 
+  public String getName() {
+    return name;
+  }
 }

src/main/java/net/helenus/core/Ordered.java

@@ -1,10 +1,8 @@
 package net.helenus.core;
 
-import java.util.Objects;
-
 import com.datastax.driver.core.querybuilder.Ordering;
 import com.datastax.driver.core.querybuilder.QueryBuilder;
-
+import java.util.Objects;
 import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.mapping.ColumnType;
 import net.helenus.mapping.MappingUtil;
@@ -34,16 +32,13 @@ public final class Ordered {
     }
 
     switch (direction) {
-
-			case ASC :
+      case ASC:
         return QueryBuilder.asc(propNode.getColumnName());
 
-			case DESC :
+      case DESC:
         return QueryBuilder.desc(propNode.getColumnName());
-
     }
 
     throw new HelenusMappingException("invalid direction " + direction);
   }
-
 }

src/main/java/net/helenus/core/PostCommitFunction.java

@@ -0,0 +1,78 @@
+package net.helenus.core;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+import net.helenus.support.CheckedRunnable;
+
+public class PostCommitFunction<T, R> implements java.util.function.Function<T, R> {
+    public static final PostCommitFunction<Void, Void>  NULL_ABORT = new PostCommitFunction<Void, Void>(null, null, null, false);
+    public static final PostCommitFunction<Void, Void> NULL_COMMIT = new PostCommitFunction<Void, Void>(null, null, null, true);
+
+  private final List<CheckedRunnable> commitThunks;
+  private final List<CheckedRunnable> abortThunks;
+  private Consumer<? super Throwable> exceptionallyThunk;
+  private boolean committed;
+
+  PostCommitFunction(List<CheckedRunnable> postCommit, List<CheckedRunnable> abortThunks,
+      Consumer<? super Throwable> exceptionallyThunk,
+      boolean committed) {
+    this.commitThunks = postCommit;
+    this.abortThunks = abortThunks;
+    this.exceptionallyThunk = exceptionallyThunk;
+    this.committed = committed;
+  }
+
+  private void apply(CheckedRunnable... fns) {
+      try {
+          for (CheckedRunnable fn : fns) {
+              fn.run();
+          }
+      } catch (Throwable t) {
+          if (exceptionallyThunk != null) {
+              exceptionallyThunk.accept(t);
+          }
+      }
+  }
+
+  public PostCommitFunction<T, R> andThen(CheckedRunnable... after) {
+    Objects.requireNonNull(after);
+    if (commitThunks == null) {
+      if (committed) {
+          apply(after);
+      }
+    } else {
+        for (CheckedRunnable fn : after) {
+            commitThunks.add(fn);
+        }
+    }
+    return this;
+  }
+
+  public PostCommitFunction<T, R> orElse(CheckedRunnable... after) {
+    Objects.requireNonNull(after);
+    if (abortThunks == null) {
+      if (!committed) {
+          apply(after);
+      }
+    } else {
+        for (CheckedRunnable fn : after) {
+            abortThunks.add(fn);
+        }
+    }
+    return this;
+  }
+
+  public PostCommitFunction<T, R> exceptionally(Consumer<? super Throwable> fn) {
+      Objects.requireNonNull(fn);
+      exceptionallyThunk = fn;
+      return this;
+  }
+
+  @Override
+  public R apply(T t) {
+    return null;
+  }
+}

src/main/java/net/helenus/core/Postulate.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -17,7 +18,6 @@ package net.helenus.core;
 
 import com.datastax.driver.core.querybuilder.Clause;
 import com.datastax.driver.core.querybuilder.QueryBuilder;
-
 import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.mapping.value.ColumnValuePreparer;
 import net.helenus.support.HelenusMappingException;
@@ -39,38 +39,40 @@ public final class Postulate<V> {
   public Clause getClause(HelenusPropertyNode node, ColumnValuePreparer valuePreparer) {
 
     switch (operator) {
+      case EQ:
+        return QueryBuilder.eq(
+            node.getColumnName(), valuePreparer.prepareColumnValue(values[0], node.getProperty()));
 
-			case EQ :
-				return QueryBuilder.eq(node.getColumnName(),
-						valuePreparer.prepareColumnValue(values[0], node.getProperty()));
-
-			case IN :
+      case IN:
         Object[] preparedValues = new Object[values.length];
         for (int i = 0; i != values.length; ++i) {
           preparedValues[i] = valuePreparer.prepareColumnValue(values[i], node.getProperty());
         }
         return QueryBuilder.in(node.getColumnName(), preparedValues);
 
-			case LT :
-				return QueryBuilder.lt(node.getColumnName(),
-						valuePreparer.prepareColumnValue(values[0], node.getProperty()));
+      case LT:
+        return QueryBuilder.lt(
+            node.getColumnName(), valuePreparer.prepareColumnValue(values[0], node.getProperty()));
 
-			case LTE :
-				return QueryBuilder.lte(node.getColumnName(),
-						valuePreparer.prepareColumnValue(values[0], node.getProperty()));
+      case LTE:
+        return QueryBuilder.lte(
+            node.getColumnName(), valuePreparer.prepareColumnValue(values[0], node.getProperty()));
 
-			case GT :
-				return QueryBuilder.gt(node.getColumnName(),
-						valuePreparer.prepareColumnValue(values[0], node.getProperty()));
+      case GT:
+        return QueryBuilder.gt(
+            node.getColumnName(), valuePreparer.prepareColumnValue(values[0], node.getProperty()));
 
-			case GTE :
-				return QueryBuilder.gte(node.getColumnName(),
-						valuePreparer.prepareColumnValue(values[0], node.getProperty()));
+      case GTE:
+        return QueryBuilder.gte(
+            node.getColumnName(), valuePreparer.prepareColumnValue(values[0], node.getProperty()));
 
-			default :
+      default:
         throw new HelenusMappingException("unknown filter operation " + operator);
     }
+  }
 
+  public V[] values() {
+    return values;
   }
 
   @Override
@@ -92,11 +94,8 @@ public final class Postulate<V> {
         b.append(String.valueOf(values[i]));
       }
       return b.append(')').toString();
-
     }
 
     return operator.getName() + values[0];
-
   }
-
 }

src/main/java/net/helenus/core/PropertyValueValidator.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -20,5 +21,4 @@ import net.helenus.mapping.HelenusProperty;
 public interface PropertyValueValidator {
 
   void validate(HelenusProperty prop, Object value);
-
 }

src/main/java/net/helenus/core/Query.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,24 +16,17 @@
  */
 package net.helenus.core;
 
+import com.datastax.driver.core.querybuilder.BindMarker;
+import com.datastax.driver.core.querybuilder.QueryBuilder;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
-
-import com.datastax.driver.core.querybuilder.BindMarker;
-import com.datastax.driver.core.querybuilder.QueryBuilder;
-
 import net.helenus.mapping.OrderingDirection;
 
-/**
- * Sugar methods for the queries
- *
- */
-
+/** Sugar methods for the queries */
 public final class Query {
 
-	private Query() {
-	}
+  private Query() {}
 
   public static BindMarker marker() {
     return QueryBuilder.bindMarker();
@@ -83,7 +77,6 @@ public final class Query {
       public V get() {
         return listGetter.get().get(index);
       }
-
     };
   }
 
@@ -97,8 +90,6 @@ public final class Query {
       public V get() {
         return mapGetter.get().get(k);
       }
-
     };
   }
-
 }

src/main/java/net/helenus/core/SchemaUtil.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,24 +16,25 @@
  */
 package net.helenus.core;
 
-import java.util.*;
-import java.util.stream.Collectors;
-
 import com.datastax.driver.core.*;
-import com.datastax.driver.core.IndexMetadata;
+import com.datastax.driver.core.querybuilder.IsNotNullClause;
+import com.datastax.driver.core.querybuilder.QueryBuilder;
+import com.datastax.driver.core.querybuilder.Select;
 import com.datastax.driver.core.schemabuilder.*;
 import com.datastax.driver.core.schemabuilder.Create.Options;
-
+import java.util.*;
+import java.util.stream.Collectors;
+import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.mapping.*;
 import net.helenus.mapping.ColumnType;
+import net.helenus.mapping.annotation.ClusteringColumn;
 import net.helenus.mapping.type.OptionalColumnMetadata;
 import net.helenus.support.CqlUtil;
 import net.helenus.support.HelenusMappingException;
 
 public final class SchemaUtil {
 
-	private SchemaUtil() {
-	}
+  private SchemaUtil() {}
 
   public static RegularStatement use(String keyspace, boolean forceQuote) {
     if (forceQuote) {
@@ -55,23 +57,31 @@ public final class SchemaUtil {
       ColumnType columnType = prop.getColumnType();
 
       if (columnType == ColumnType.PARTITION_KEY || columnType == ColumnType.CLUSTERING_COLUMN) {
-				throw new HelenusMappingException("primary key columns are not supported in UserDefinedType for "
-						+ prop.getPropertyName() + " in entity " + entity);
+        throw new HelenusMappingException(
+            "primary key columns are not supported in UserDefinedType for "
+                + prop.getPropertyName()
+                + " in entity "
+                + entity);
       }
 
       try {
         prop.getDataType().addColumn(create, prop.getColumnName());
       } catch (IllegalArgumentException e) {
-				throw new HelenusMappingException("invalid column name '" + prop.getColumnName() + "' in entity '"
-						+ entity.getName().getName() + "'", e);
+        throw new HelenusMappingException(
+            "invalid column name '"
+                + prop.getColumnName()
+                + "' in entity '"
+                + entity.getName().getName()
+                + "'",
+            e);
       }
     }
 
     return create;
   }
 
-	public static List<SchemaStatement> alterUserType(UserType userType, HelenusEntity entity,
-			boolean dropUnusedColumns) {
+  public static List<SchemaStatement> alterUserType(
+      UserType userType, HelenusEntity entity, boolean dropUnusedColumns) {
 
     if (entity.getType() != HelenusEntityType.UDT) {
       throw new HelenusMappingException("expected UDT entity " + entity);
@@ -80,13 +90,13 @@ public final class SchemaUtil {
     List<SchemaStatement> result = new ArrayList<SchemaStatement>();
 
     /**
-		 * TODO: In future replace SchemaBuilder.alterTable by SchemaBuilder.alterType
-		 * when it will exist
+     * TODO: In future replace SchemaBuilder.alterTable by SchemaBuilder.alterType when it will
+     * exist
      */
-
     Alter alter = SchemaBuilder.alterTable(entity.getName().toCql());
 
-		final Set<String> visitedColumns = dropUnusedColumns ? new HashSet<String>() : Collections.<String>emptySet();
+    final Set<String> visitedColumns =
+        dropUnusedColumns ? new HashSet<String>() : Collections.<String>emptySet();
 
     for (HelenusProperty prop : entity.getOrderedProperties()) {
 
@@ -103,13 +113,13 @@ public final class SchemaUtil {
       }
 
       DataType dataType = userType.getFieldType(columnName);
-			SchemaStatement stmt = prop.getDataType().alterColumn(alter, prop.getColumnName(),
-					optional(columnName, dataType));
+      SchemaStatement stmt =
+          prop.getDataType()
+              .alterColumn(alter, prop.getColumnName(), optional(columnName, dataType));
 
       if (stmt != null) {
         result.add(stmt);
       }
-
     }
 
     if (dropUnusedColumns) {
@@ -117,13 +127,11 @@ public final class SchemaUtil {
         if (!visitedColumns.contains(field)) {
 
           result.add(alter.dropColumn(field));
-
         }
       }
     }
 
     return result;
-
   }
 
   public static SchemaStatement dropUserType(HelenusEntity entity) {
@@ -133,7 +141,6 @@ public final class SchemaUtil {
     }
 
     return SchemaBuilder.dropType(entity.getName().toCql()).ifExists();
-
   }
 
   public static SchemaStatement dropUserType(UserType type) {
@@ -141,6 +148,100 @@ public final class SchemaUtil {
     return SchemaBuilder.dropType(type.getTypeName()).ifExists();
   }
 
+  public static String createPrimaryKeyPhrase(Collection<HelenusProperty> properties) {
+    List<String> p = new ArrayList<String>(properties.size());
+    List<String> c = new ArrayList<String>(properties.size());
+
+    for (HelenusProperty prop : properties) {
+      String columnName = prop.getColumnName().toCql();
+      switch (prop.getColumnType()) {
+        case PARTITION_KEY:
+          p.add(columnName);
+          break;
+        case CLUSTERING_COLUMN:
+          c.add(columnName);
+          break;
+        default:
+          break;
+      }
+    }
+
+    if (p.size() == 0 && c.size() == 0)
+      return "{"
+          + properties
+              .stream()
+              .map(HelenusProperty::getPropertyName)
+              .collect(Collectors.joining(", "))
+          + "}";
+
+    return "("
+        + ((p.size() > 1) ? "(" + String.join(", ", p) + ")" : p.get(0))
+        + ((c.size() > 0)
+            ? ", " + ((c.size() > 1) ? "(" + String.join(", ", c) + ")" : c.get(0))
+            : "")
+        + ")";
+  }
+
+  public static SchemaStatement createMaterializedView(
+      String keyspace, String viewName, HelenusEntity entity) {
+    if (entity.getType() != HelenusEntityType.VIEW) {
+      throw new HelenusMappingException("expected view entity " + entity);
+    }
+
+    List<HelenusPropertyNode> props = new ArrayList<HelenusPropertyNode>();
+    entity
+        .getOrderedProperties()
+        .stream()
+        .map(p -> new HelenusPropertyNode(p, Optional.empty()))
+        .forEach(p -> props.add(p));
+
+    Select.Selection selection = QueryBuilder.select();
+
+    for (HelenusPropertyNode prop : props) {
+      String columnName = prop.getColumnName();
+      selection = selection.column(columnName);
+    }
+    Class<?> iface = entity.getMappingInterface();
+    String tableName = Helenus.entity(iface.getInterfaces()[0]).getName().toCql();
+    Select.Where where = selection.from(tableName).where();
+    List<String> o = new ArrayList<String>(props.size());
+
+    for (HelenusPropertyNode prop : props) {
+      String columnName = prop.getColumnName();
+      switch (prop.getProperty().getColumnType()) {
+        case PARTITION_KEY:
+          where = where.and(new IsNotNullClause(columnName));
+          break;
+
+        case CLUSTERING_COLUMN:
+          where = where.and(new IsNotNullClause(columnName));
+
+          ClusteringColumn clusteringColumn =
+              prop.getProperty().getGetterMethod().getAnnotation(ClusteringColumn.class);
+          if (clusteringColumn != null && clusteringColumn.ordering() != null) {
+            o.add(columnName + " " + clusteringColumn.ordering().cql());
+          }
+          break;
+        default:
+          break;
+      }
+    }
+
+    String primaryKey = "PRIMARY KEY " + createPrimaryKeyPhrase(entity.getOrderedProperties());
+
+    String clustering = "";
+    if (o.size() > 0) {
+      clustering = "WITH CLUSTERING ORDER BY (" + String.join(", ", o) + ")";
+    }
+    return new CreateMaterializedView(keyspace, viewName, where, primaryKey, clustering)
+        .ifNotExists();
+  }
+
+  public static SchemaStatement dropMaterializedView(
+      String keyspace, String viewName, HelenusEntity entity) {
+    return new DropMaterializedView(keyspace, viewName);
+  }
+
   public static SchemaStatement createTable(HelenusEntity entity) {
 
     if (entity.getType() != HelenusEntityType.TABLE) {
@@ -166,20 +267,19 @@ public final class SchemaUtil {
       }
 
       prop.getDataType().addColumn(create, prop.getColumnName());
-
     }
 
     if (!clusteringColumns.isEmpty()) {
       Options options = create.withOptions();
-			clusteringColumns
-					.forEach(p -> options.clusteringOrder(p.getColumnName().toCql(), mapDirection(p.getOrdering())));
+      clusteringColumns.forEach(
+          p -> options.clusteringOrder(p.getColumnName().toCql(), mapDirection(p.getOrdering())));
     }
 
     return create;
-
   }
 
-	public static List<SchemaStatement> alterTable(TableMetadata tmd, HelenusEntity entity, boolean dropUnusedColumns) {
+  public static List<SchemaStatement> alterTable(
+      TableMetadata tmd, HelenusEntity entity, boolean dropUnusedColumns) {
 
     if (entity.getType() != HelenusEntityType.TABLE) {
       throw new HelenusMappingException("expected table entity " + entity);
@@ -189,7 +289,8 @@ public final class SchemaUtil {
 
     Alter alter = SchemaBuilder.alterTable(entity.getName().toCql());
 
-		final Set<String> visitedColumns = dropUnusedColumns ? new HashSet<String>() : Collections.<String>emptySet();
+    final Set<String> visitedColumns =
+        dropUnusedColumns ? new HashSet<String>() : Collections.<String>emptySet();
 
     for (HelenusProperty prop : entity.getOrderedProperties()) {
 
@@ -206,13 +307,12 @@ public final class SchemaUtil {
       }
 
       ColumnMetadata columnMetadata = tmd.getColumn(columnName);
-			SchemaStatement stmt = prop.getDataType().alterColumn(alter, prop.getColumnName(),
-					optional(columnMetadata));
+      SchemaStatement stmt =
+          prop.getDataType().alterColumn(alter, prop.getColumnName(), optional(columnMetadata));
 
       if (stmt != null) {
         result.add(stmt);
       }
-
     }
 
     if (dropUnusedColumns) {
@@ -220,7 +320,6 @@ public final class SchemaUtil {
         if (!visitedColumns.contains(cm.getName())) {
 
           result.add(alter.dropColumn(cm.getName()));
-
         }
       }
     }
@@ -235,12 +334,11 @@ public final class SchemaUtil {
     }
 
     return SchemaBuilder.dropTable(entity.getName().toCql()).ifExists();
-
   }
 
   public static SchemaStatement createIndex(HelenusProperty prop) {
     if (prop.caseSensitiveIndex()) {
-            return SchemaBuilder.createIndex(prop.getIndexName().get().toCql())
+      return SchemaBuilder.createIndex(indexName(prop))
           .ifNotExists()
           .onTable(prop.getEntity().getName().toCql())
           .andColumn(prop.getColumnName().toCql());
@@ -254,20 +352,28 @@ public final class SchemaUtil {
 
   public static List<SchemaStatement> createIndexes(HelenusEntity entity) {
 
-		return entity.getOrderedProperties().stream().filter(p -> p.getIndexName().isPresent())
-				.map(p -> SchemaUtil.createIndex(p)).collect(Collectors.toList());
-
+    return entity
+        .getOrderedProperties()
+        .stream()
+        .filter(p -> p.getIndexName().isPresent())
+        .map(p -> SchemaUtil.createIndex(p))
+        .collect(Collectors.toList());
   }
 
-	public static List<SchemaStatement> alterIndexes(TableMetadata tmd, HelenusEntity entity,
-			boolean dropUnusedIndexes) {
+  public static List<SchemaStatement> alterIndexes(
+      TableMetadata tmd, HelenusEntity entity, boolean dropUnusedIndexes) {
 
     List<SchemaStatement> list = new ArrayList<SchemaStatement>();
 
-		final Set<String> visitedColumns = dropUnusedIndexes ? new HashSet<String>() : Collections.<String>emptySet();
-
-		entity.getOrderedProperties().stream().filter(p -> p.getIndexName().isPresent()).forEach(p -> {
+    final Set<String> visitedColumns =
+        dropUnusedIndexes ? new HashSet<String>() : Collections.<String>emptySet();
 
+    entity
+        .getOrderedProperties()
+        .stream()
+        .filter(p -> p.getIndexName().isPresent())
+        .forEach(
+            p -> {
               String columnName = p.getColumnName().getName();
 
               if (dropUnusedIndexes) {
@@ -284,32 +390,31 @@ public final class SchemaUtil {
               } else {
                 list.add(createIndex(p));
               }
-
             });
 
     if (dropUnusedIndexes) {
 
-			tmd.getColumns().stream().filter(c -> tmd.getIndex(c.getName()) != null && !visitedColumns.contains(c.getName()))
-					.forEach(c -> {
+      tmd.getColumns()
+          .stream()
+          .filter(c -> tmd.getIndex(c.getName()) != null && !visitedColumns.contains(c.getName()))
+          .forEach(
+              c -> {
                 list.add(SchemaBuilder.dropIndex(tmd.getIndex(c.getName()).getName()).ifExists());
-
               });
-
     }
 
     return list;
-
   }
 
   public static SchemaStatement dropIndex(HelenusProperty prop) {
-		return SchemaBuilder.dropIndex(prop.getIndexName().get().toCql()).ifExists();
+    return SchemaBuilder.dropIndex(indexName(prop)).ifExists();
   }
 
   private static SchemaBuilder.Direction mapDirection(OrderingDirection o) {
     switch (o) {
-			case ASC :
+      case ASC:
         return SchemaBuilder.Direction.ASC;
-			case DESC :
+      case DESC:
         return SchemaBuilder.Direction.DESC;
     }
     throw new HelenusMappingException("unknown ordering " + o);
@@ -319,9 +424,11 @@ public final class SchemaUtil {
 
     throw new HelenusMappingException(
         "only primitive types and Set,List,Map collections and UserDefinedTypes are allowed, unknown type for property '"
-						+ prop.getPropertyName() + "' type is '" + prop.getJavaType() + "' in the entity "
+            + prop.getPropertyName()
+            + "' type is '"
+            + prop.getJavaType()
+            + "' in the entity "
             + prop.getEntity());
-
   }
 
   private static OptionalColumnMetadata optional(final ColumnMetadata columnMetadata) {
@@ -337,7 +444,6 @@ public final class SchemaUtil {
         public DataType getType() {
           return columnMetadata.getType();
         }
-
       };
     }
     return null;
@@ -356,10 +462,13 @@ public final class SchemaUtil {
         public DataType getType() {
           return dataType;
         }
-
       };
     }
     return null;
   }
 
+  private static String indexName(HelenusProperty prop) {
+      return prop.getEntity().getName().toCql() + "_" + prop.getIndexName().get().toCql();
+  }
+
 }

src/main/java/net/helenus/core/SessionInitializer.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -18,39 +19,50 @@ package net.helenus.core;
 import com.codahale.metrics.MetricRegistry;
 import com.datastax.driver.core.*;
 import com.google.common.util.concurrent.MoreExecutors;
-import net.helenus.mapping.HelenusEntity;
-import net.helenus.mapping.HelenusEntityType;
-import net.helenus.mapping.value.ColumnValuePreparer;
-import net.helenus.mapping.value.ColumnValueProvider;
-import net.helenus.support.HelenusException;
-import net.helenus.support.PackageUtil;
-
 import java.io.IOException;
 import java.io.PrintStream;
 import java.util.*;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
 import java.util.function.Consumer;
+import javax.cache.CacheManager;
+import net.helenus.core.reflect.DslExportable;
+import net.helenus.mapping.HelenusEntity;
+import net.helenus.mapping.HelenusEntityType;
+import net.helenus.mapping.MappingUtil;
+import net.helenus.mapping.value.ColumnValuePreparer;
+import net.helenus.mapping.value.ColumnValueProvider;
+import net.helenus.support.Either;
+import net.helenus.support.HelenusException;
+import net.helenus.support.PackageUtil;
 
 public final class SessionInitializer extends AbstractSessionOperations {
 
   private final Session session;
+  private final List<Either<Object, Class<?>>> initList = new ArrayList<Either<Object, Class<?>>>();
   private CodecRegistry registry;
-	private MetricRegistry metricRegistry;
   private String usingKeyspace;
   private boolean showCql = false;
+  private boolean showValues = true;
+  private ConsistencyLevel consistencyLevel;
+  private boolean idempotent = false;
+  private MetricRegistry metricRegistry = new MetricRegistry();
   private PrintStream printStream = System.out;
   private Executor executor = MoreExecutors.directExecutor();
-
   private SessionRepositoryBuilder sessionRepository;
-
   private boolean dropUnusedColumns = false;
   private boolean dropUnusedIndexes = false;
-
   private KeyspaceMetadata keyspaceMetadata;
-
-	private final List<Object> initList = new ArrayList<Object>();
   private AutoDdl autoDdl = AutoDdl.UPDATE;
+  private CacheManager cacheManager = null;
+
+  SessionInitializer(Session session, String keyspace) {
+    this.session = session;
+    this.usingKeyspace = keyspace;
+    if (session != null) {
+      this.sessionRepository = new SessionRepositoryBuilder(session);
+    }
+  }
 
   SessionInitializer(Session session) {
     this.session = Objects.requireNonNull(session, "empty session");
@@ -58,9 +70,6 @@ public final class SessionInitializer extends AbstractSessionOperations {
     this.sessionRepository = new SessionRepositoryBuilder(session);
   }
 
-	@Override
-	public void cache(String key, Object value) { }
-
   @Override
   public Session currentSession() {
     return session;
@@ -101,6 +110,53 @@ public final class SessionInitializer extends AbstractSessionOperations {
     return this;
   }
 
+  public SessionInitializer showQueryValuesInLog(boolean showValues) {
+    this.showValues = showValues;
+    return this;
+  }
+
+  public SessionInitializer showQueryValuesInLog() {
+    this.showValues = true;
+    return this;
+  }
+
+  public boolean showValues() {
+    return showValues;
+  }
+
+  public SessionInitializer metricRegistry(MetricRegistry metricRegistry) {
+    this.metricRegistry = metricRegistry;
+    return this;
+  }
+
+  public SessionInitializer consistencyLevel(ConsistencyLevel consistencyLevel) {
+    this.consistencyLevel = consistencyLevel;
+    return this;
+  }
+
+  public SessionInitializer setCacheManager(CacheManager cacheManager) {
+    this.cacheManager = cacheManager;
+    return this;
+  }
+
+  public ConsistencyLevel getDefaultConsistencyLevel() {
+    return consistencyLevel;
+  }
+
+  public SessionInitializer setOperationsIdempotentByDefault() {
+    this.idempotent = true;
+    return this;
+  }
+
+  public SessionInitializer idempotentQueryExecution(boolean idempotent) {
+    this.idempotent = idempotent;
+    return this;
+  }
+
+  public boolean getDefaultQueryIdempotency() {
+    return idempotent;
+  }
+
   @Override
   public PrintStream getPrintStream() {
     return printStream;
@@ -117,12 +173,6 @@ public final class SessionInitializer extends AbstractSessionOperations {
     return this;
   }
 
-	public SessionInitializer withMetricsRegistry(MetricRegistry metricRegistry) {
-        Objects.requireNonNull(metricRegistry, "empty registry");
-        this.metricRegistry = metricRegistry;
-        return this;
-    }
-
   public SessionInitializer withCachingExecutor() {
     this.executor = Executors.newCachedThreadPool();
     return this;
@@ -150,8 +200,13 @@ public final class SessionInitializer extends AbstractSessionOperations {
 
   public SessionInitializer addPackage(String packageName) {
     try {
-			PackageUtil.getClasses(packageName).stream().filter(c -> c.isInterface() && !c.isAnnotation())
-					.forEach(initList::add);
+      PackageUtil.getClasses(packageName)
+          .stream()
+          .filter(c -> c.isInterface() && !c.isAnnotation())
+          .forEach(
+              clazz -> {
+                initList.add(Either.right(clazz));
+              });
     } catch (IOException | ClassNotFoundException e) {
       throw new HelenusException("fail to add package " + packageName, e);
     }
@@ -163,7 +218,7 @@ public final class SessionInitializer extends AbstractSessionOperations {
     int len = dsls.length;
     for (int i = 0; i != len; ++i) {
       Object obj = Objects.requireNonNull(dsls[i], "element " + i + " is empty");
-			initList.add(obj);
+      initList.add(Either.left(obj));
     }
     return this;
   }
@@ -194,8 +249,10 @@ public final class SessionInitializer extends AbstractSessionOperations {
   }
 
   public SessionInitializer use(String keyspace) {
+    if (session != null) {
       session.execute(SchemaUtil.use(keyspace, false));
       this.usingKeyspace = keyspace;
+    }
     return this;
   }
 
@@ -206,62 +263,128 @@ public final class SessionInitializer extends AbstractSessionOperations {
   }
 
   public void singleton() {
-
     Helenus.setSession(get());
   }
 
   public synchronized HelenusSession get() {
     initialize();
-		return new HelenusSession(session, usingKeyspace, registry, showCql, printStream, sessionRepository, executor,
-				autoDdl == AutoDdl.CREATE_DROP, metricRegistry);
+    return new HelenusSession(
+        session,
+        usingKeyspace,
+        registry,
+        showCql,
+        showValues,
+        printStream,
+        sessionRepository,
+        executor,
+        autoDdl == AutoDdl.CREATE_DROP,
+        consistencyLevel,
+        idempotent,
+        cacheManager,
+        metricRegistry);
   }
 
   private void initialize() {
 
     Objects.requireNonNull(usingKeyspace, "please define keyspace by 'use' operator");
 
-		initList.forEach(dsl -> sessionRepository.add(dsl));
+    initList.forEach(
+        (either) -> {
+          Class<?> iface = null;
+          if (either.isLeft()) {
+            iface = MappingUtil.getMappingInterface(either.getLeft());
+          } else {
+            iface = either.getRight();
+          }
+
+          DslExportable dsl = (DslExportable) Helenus.dsl(iface);
+          if (session != null) {
+            dsl.setCassandraMetadataForHelenusSession(session.getCluster().getMetadata());
+          }
+          if (sessionRepository != null) {
+            sessionRepository.add(dsl);
+          }
+        });
+
+    if (session == null) return;
 
     TableOperations tableOps = new TableOperations(this, dropUnusedColumns, dropUnusedIndexes);
     UserTypeOperations userTypeOps = new UserTypeOperations(this, dropUnusedColumns);
 
     switch (autoDdl) {
+      case CREATE_DROP:
 
-			case CREATE_DROP :
+        // Drop view first, otherwise a `DROP TABLE ...` will fail as the type is still
+        // referenced
+        // by a view.
+        sessionRepository
+            .entities()
+            .stream()
+            .filter(e -> e.getType() == HelenusEntityType.VIEW)
+            .forEach(e -> tableOps.dropView(e));
 
-			    // Drop tables first, otherwise a `DROP TYPE ...` will fail as the type is still referenced
-                // by a table.
-                sessionRepository.entities().stream().filter(e -> e.getType() == HelenusEntityType.TABLE)
+        // Drop tables second, before DROP TYPE otherwise a `DROP TYPE ...` will fail as
+        // the type is
+        // still referenced by a table.
+        sessionRepository
+            .entities()
+            .stream()
+            .filter(e -> e.getType() == HelenusEntityType.TABLE)
             .forEach(e -> tableOps.dropTable(e));
 
         eachUserTypeInReverseOrder(userTypeOps, e -> userTypeOps.dropUserType(e));
 
-                // FALLTHRU to CREATE case (read: the absence of a `break;` statement here is intentional!)
-			case CREATE :
-
+        // FALLTHRU to CREATE case (read: the absence of a `break;` statement here is
+        // intentional!)
+      case CREATE:
         eachUserTypeInOrder(userTypeOps, e -> userTypeOps.createUserType(e));
 
-                sessionRepository.entities().stream().filter(e -> e.getType() == HelenusEntityType.TABLE)
+        sessionRepository
+            .entities()
+            .stream()
+            .filter(e -> e.getType() == HelenusEntityType.TABLE)
             .forEach(e -> tableOps.createTable(e));
 
+        sessionRepository
+            .entities()
+            .stream()
+            .filter(e -> e.getType() == HelenusEntityType.VIEW)
+            .forEach(e -> tableOps.createView(e));
+
         break;
 
-			case VALIDATE :
-
+      case VALIDATE:
         eachUserTypeInOrder(userTypeOps, e -> userTypeOps.validateUserType(getUserType(e), e));
 
-				sessionRepository.entities().stream().filter(e -> e.getType() == HelenusEntityType.TABLE)
+        sessionRepository
+            .entities()
+            .stream()
+            .filter(e -> e.getType() == HelenusEntityType.TABLE)
             .forEach(e -> tableOps.validateTable(getTableMetadata(e), e));
+
         break;
 
-			case UPDATE :
-
+      case UPDATE:
         eachUserTypeInOrder(userTypeOps, e -> userTypeOps.updateUserType(getUserType(e), e));
 
-				sessionRepository.entities().stream().filter(e -> e.getType() == HelenusEntityType.TABLE)
-						.forEach(e -> tableOps.updateTable(getTableMetadata(e), e));
-				break;
+        sessionRepository
+            .entities()
+            .stream()
+            .filter(e -> e.getType() == HelenusEntityType.VIEW)
+            .forEach(e -> tableOps.dropView(e));
 
+        sessionRepository
+            .entities()
+            .stream()
+            .filter(e -> e.getType() == HelenusEntityType.TABLE)
+            .forEach(e -> tableOps.updateTable(getTableMetadata(e), e));
+
+        sessionRepository
+            .entities()
+            .stream()
+            .filter(e -> e.getType() == HelenusEntityType.VIEW)
+            .forEach(e -> tableOps.createView(e));
+        break;
     }
 
     KeyspaceMetadata km = getKeyspaceMetadata();
@@ -269,42 +392,43 @@ public final class SessionInitializer extends AbstractSessionOperations {
     for (UserType userType : km.getUserTypes()) {
       sessionRepository.addUserType(userType.getTypeName(), userType);
     }
-
   }
 
-    private void eachUserTypeInOrder(UserTypeOperations userTypeOps, Consumer<? super HelenusEntity> action) {
+  private void eachUserTypeInOrder(
+      UserTypeOperations userTypeOps, Consumer<? super HelenusEntity> action) {
 
     Set<HelenusEntity> processedSet = new HashSet<HelenusEntity>();
     Set<HelenusEntity> stack = new HashSet<HelenusEntity>();
 
-        sessionRepository.entities().stream().filter(e -> e.getType() == HelenusEntityType.UDT).forEach(e -> {
+    sessionRepository
+        .entities()
+        .stream()
+        .filter(e -> e.getType() == HelenusEntityType.UDT)
+        .forEach(
+            e -> {
               stack.clear();
               eachUserTypeInRecursion(e, processedSet, stack, userTypeOps, action);
             });
-
   }
 
-    private void eachUserTypeInReverseOrder(UserTypeOperations userTypeOps, Consumer<? super HelenusEntity> action) {
+  private void eachUserTypeInReverseOrder(
+      UserTypeOperations userTypeOps, Consumer<? super HelenusEntity> action) {
     ArrayDeque<HelenusEntity> deque = new ArrayDeque<>();
     eachUserTypeInOrder(userTypeOps, e -> deque.addFirst(e));
-	    deque.stream().forEach(e -> {action.accept(e); });
-/*
-        Set<HelenusEntity> processedSet = new HashSet<HelenusEntity>();
-        Set<HelenusEntity> stack = new HashSet<HelenusEntity>();
-
-        sessionRepository.entities().stream()
-                .filter(e -> e.getType() == HelenusEntityType.UDT)
-                .collect(Collectors.toCollection(ArrayDeque::new))
-                .descendingIterator()
-                .forEachRemaining(e -> {
-                    stack.clear();
-                    eachUserTypeInRecursion(e, processedSet, stack, userTypeOps, action);
+    deque
+        .stream()
+        .forEach(
+            e -> {
+              action.accept(e);
             });
-*/
   }
 
-    private void eachUserTypeInRecursion(HelenusEntity e, Set<HelenusEntity> processedSet, Set<HelenusEntity> stack,
-			UserTypeOperations userTypeOps, Consumer<? super HelenusEntity> action) {
+  private void eachUserTypeInRecursion(
+      HelenusEntity e,
+      Set<HelenusEntity> processedSet,
+      Set<HelenusEntity> stack,
+      UserTypeOperations userTypeOps,
+      Consumer<? super HelenusEntity> action) {
 
     stack.add(e);
 
@@ -321,19 +445,18 @@ public final class SessionInitializer extends AbstractSessionOperations {
       action.accept(e);
       processedSet.add(e);
     }
-
   }
 
   private KeyspaceMetadata getKeyspaceMetadata() {
     if (keyspaceMetadata == null) {
-			keyspaceMetadata = session.getCluster().getMetadata().getKeyspace(usingKeyspace.toLowerCase());
+      keyspaceMetadata =
+          session.getCluster().getMetadata().getKeyspace(usingKeyspace.toLowerCase());
     }
     return keyspaceMetadata;
   }
 
   private TableMetadata getTableMetadata(HelenusEntity entity) {
     return getKeyspaceMetadata().getTable(entity.getName().getName());
-
   }
 
   private UserType getUserType(HelenusEntity entity) {

src/main/java/net/helenus/core/SessionRepository.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,11 +16,9 @@
  */
 package net.helenus.core;
 
-import java.util.Collection;
-
 import com.datastax.driver.core.UserType;
 import com.google.common.collect.ImmutableMap;
-
+import java.util.Collection;
 import net.helenus.mapping.HelenusEntity;
 
 public final class SessionRepository {
@@ -32,7 +31,8 @@ public final class SessionRepository {
 
     userTypeMap = ImmutableMap.<String, UserType>builder().putAll(builder.getUserTypeMap()).build();
 
-		entityMap = ImmutableMap.<Class<?>, HelenusEntity>builder().putAll(builder.getEntityMap()).build();
+    entityMap =
+        ImmutableMap.<Class<?>, HelenusEntity>builder().putAll(builder.getEntityMap()).build();
   }
 
   public UserType findUserType(String name) {
@@ -42,5 +42,4 @@ public final class SessionRepository {
   public Collection<HelenusEntity> entities() {
     return entityMap.values();
   }
-
 }

src/main/java/net/helenus/core/SessionRepositoryBuilder.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,17 +16,15 @@
  */
 package net.helenus.core;
 
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Optional;
-
 import com.datastax.driver.core.Session;
 import com.datastax.driver.core.UDTValue;
 import com.datastax.driver.core.UserType;
 import com.google.common.collect.HashMultimap;
 import com.google.common.collect.Multimap;
-
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
 import net.helenus.mapping.HelenusEntity;
 import net.helenus.mapping.HelenusEntityType;
 import net.helenus.mapping.HelenusProperty;
@@ -35,7 +34,8 @@ import net.helenus.support.HelenusMappingException;
 
 public final class SessionRepositoryBuilder {
 
-	private static final Optional<HelenusEntityType> OPTIONAL_UDT = Optional.of(HelenusEntityType.UDT);
+  private static final Optional<HelenusEntityType> OPTIONAL_UDT =
+      Optional.of(HelenusEntityType.UDT);
 
   private final Map<Class<?>, HelenusEntity> entityMap = new HashMap<Class<?>, HelenusEntity>();
 
@@ -45,7 +45,6 @@ public final class SessionRepositoryBuilder {
 
   private final Session session;
 
-
   SessionRepositoryBuilder(Session session) {
     this.session = session;
   }
@@ -85,7 +84,6 @@ public final class SessionRepositoryBuilder {
     if (concurrentEntity == null) {
       addUserDefinedTypes(entity.getOrderedProperties());
     }
-
   }
 
   public HelenusEntity add(Object dsl, Optional<HelenusEntityType> type) {
@@ -101,7 +99,8 @@ public final class SessionRepositoryBuilder {
       entity = helenusEntity;
 
       if (type.isPresent() && entity.getType() != type.get()) {
-				throw new HelenusMappingException("unexpected entity type " + entity.getType() + " for " + entity);
+        throw new HelenusMappingException(
+            "unexpected entity type " + entity.getType() + " for " + entity);
       }
 
       HelenusEntity concurrentEntity = entityMap.putIfAbsent(iface, entity);
@@ -111,7 +110,6 @@ public final class SessionRepositoryBuilder {
       } else {
         entity = concurrentEntity;
       }
-
     }
 
     return entity;
@@ -140,13 +138,8 @@ public final class SessionRepositoryBuilder {
           if (HelenusEntityType.UDT == prop.getEntity().getType()) {
             userTypeUsesMap.put(prop.getEntity(), addedUserType);
           }
-
         }
-
       }
-
     }
-
   }
-
 }

src/main/java/net/helenus/core/TableOperations.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,11 +16,9 @@
  */
 package net.helenus.core;
 
-import java.util.List;
-
 import com.datastax.driver.core.TableMetadata;
 import com.datastax.driver.core.schemabuilder.SchemaStatement;
-
+import java.util.List;
 import net.helenus.mapping.HelenusEntity;
 import net.helenus.support.HelenusException;
 
@@ -29,31 +28,30 @@ public final class TableOperations {
   private final boolean dropUnusedColumns;
   private final boolean dropUnusedIndexes;
 
-	public TableOperations(AbstractSessionOperations sessionOps, boolean dropUnusedColumns, boolean dropUnusedIndexes) {
+  public TableOperations(
+      AbstractSessionOperations sessionOps, boolean dropUnusedColumns, boolean dropUnusedIndexes) {
     this.sessionOps = sessionOps;
     this.dropUnusedColumns = dropUnusedColumns;
     this.dropUnusedIndexes = dropUnusedIndexes;
   }
 
   public void createTable(HelenusEntity entity) {
-
-		sessionOps.execute(SchemaUtil.createTable(entity), true);
-
+    sessionOps.execute(SchemaUtil.createTable(entity));
     executeBatch(SchemaUtil.createIndexes(entity));
-
   }
 
   public void dropTable(HelenusEntity entity) {
-
-	    sessionOps.execute(SchemaUtil.dropTable(entity), true);
-
+    sessionOps.execute(SchemaUtil.dropTable(entity));
   }
 
   public void validateTable(TableMetadata tmd, HelenusEntity entity) {
 
     if (tmd == null) {
       throw new HelenusException(
-					"table not exists " + entity.getName() + "for entity " + entity.getMappingInterface());
+          "table does not exists "
+              + entity.getName()
+              + "for entity "
+              + entity.getMappingInterface());
     }
 
     List<SchemaStatement> list = SchemaUtil.alterTable(tmd, entity, dropUnusedColumns);
@@ -62,12 +60,37 @@ public final class TableOperations {
 
     if (!list.isEmpty()) {
       throw new HelenusException(
-					"schema changed for entity " + entity.getMappingInterface() + ", apply this command: " + list);
+          "schema changed for entity "
+              + entity.getMappingInterface()
+              + ", apply this command: "
+              + list);
     }
   }
 
   public void updateTable(TableMetadata tmd, HelenusEntity entity) {
+    if (tmd == null) {
+      createTable(entity);
+      return;
+    }
 
+    executeBatch(SchemaUtil.alterTable(tmd, entity, dropUnusedColumns));
+    executeBatch(SchemaUtil.alterIndexes(tmd, entity, dropUnusedIndexes));
+  }
+
+  public void createView(HelenusEntity entity) {
+    sessionOps.execute(
+        SchemaUtil.createMaterializedView(
+            sessionOps.usingKeyspace(), entity.getName().toCql(), entity));
+    // executeBatch(SchemaUtil.createIndexes(entity)); NOTE: Unfortunately C* 3.10 does not yet support 2i on materialized views.
+  }
+
+  public void dropView(HelenusEntity entity) {
+    sessionOps.execute(
+        SchemaUtil.dropMaterializedView(
+            sessionOps.usingKeyspace(), entity.getName().toCql(), entity));
+  }
+
+  public void updateView(TableMetadata tmd, HelenusEntity entity) {
     if (tmd == null) {
       createTable(entity);
       return;
@@ -79,10 +102,6 @@ public final class TableOperations {
 
   private void executeBatch(List<SchemaStatement> list) {
 
-		list.forEach(s -> {
-			sessionOps.execute(s, true);
-		});
-
+    list.forEach(s -> sessionOps.execute(s));
   }
-
 }

src/main/java/net/helenus/core/UnitOfWork.java

@@ -1,60 +1,816 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
 package net.helenus.core;
 
+import static net.helenus.core.HelenusSession.deleted;
+
+import com.google.common.base.Stopwatch;
+import com.google.common.collect.HashBasedTable;
+import com.google.common.collect.Table;
+import com.google.common.collect.TreeTraverser;
+import java.io.Serializable;
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import javax.cache.Cache;
+import javax.cache.CacheManager;
+import javax.cache.configuration.CacheEntryListenerConfiguration;
+import javax.cache.configuration.Configuration;
+import javax.cache.integration.CacheLoader;
+import javax.cache.integration.CacheLoaderException;
+import javax.cache.integration.CompletionListener;
+import javax.cache.processor.EntryProcessor;
+import javax.cache.processor.EntryProcessorException;
+import javax.cache.processor.EntryProcessorResult;
 
-/**
- * Encapsulates the concept of a "transaction" as a unit-of-work.
- */
-public class UnitOfWork {
+import net.helenus.core.cache.CacheUtil;
+import net.helenus.core.cache.Facet;
+import net.helenus.core.cache.MapCache;
+import net.helenus.core.operation.AbstractOperation;
+import net.helenus.core.operation.BatchOperation;
+import net.helenus.mapping.MappingUtil;
+import net.helenus.support.CheckedRunnable;
+import net.helenus.support.Either;
+import net.helenus.support.HelenusException;
+import org.apache.commons.lang3.SerializationUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-	private final HelenusSession session;
-	private ArrayList<UnitOfWork> nested;
+/** Encapsulates the concept of a "transaction" as a unit-of-work. */
+public class UnitOfWork implements AutoCloseable {
+  private static final Logger LOG = LoggerFactory.getLogger(UnitOfWork.class);
 
-	UnitOfWork(HelenusSession session) {
+  public final UnitOfWork parent;
+  protected final List<UnitOfWork> nested = new ArrayList<>();
+  protected final Table<String, String, Either<Object, List<Facet>>> cache = HashBasedTable.create();
+  protected final EvictTrackingMapCache<String, Object> statementCache;
+  protected final HelenusSession session;
+  protected String purpose;
+  protected List<String> nestedPurposes = new ArrayList<String>();
+  protected String info;
+  protected int cacheHits = 0;
+  protected int cacheMisses = 0;
+  protected int databaseLookups = 0;
+  protected final Stopwatch elapsedTime;
+  protected Map<String, Double> databaseTime = new HashMap<>();
+  protected double cacheLookupTimeMSecs = 0.0;
+  private List<CheckedRunnable> commitThunks = new ArrayList<>();
+  private List<CheckedRunnable> abortThunks = new ArrayList<>();
+  private Consumer<? super Throwable> exceptionallyThunk;
+  private List<CompletableFuture<?>> asyncOperationFutures = new ArrayList<CompletableFuture<?>>();
+  private boolean aborted = false;
+  private boolean committed = false;
+  private long committedAt = 0L;
+  private BatchOperation batch;
+
+  public UnitOfWork(HelenusSession session) {
+    this(session, null);
+  }
+
+  public UnitOfWork(HelenusSession session, UnitOfWork parent) {
+    Objects.requireNonNull(session, "containing session cannot be null");
+
+    this.parent = parent;
+    if (parent != null) {
+      parent.addNestedUnitOfWork(this);
+    }
     this.session = session;
-		// log.record(txn::start)
+    CacheLoader<String, Object> cacheLoader = null;
+    if (parent != null) {
+      cacheLoader =
+          new CacheLoader<String, Object>() {
+
+            Cache<String, Object> cache = parent.getCache();
+
+            @Override
+            public Object load(String key) throws CacheLoaderException {
+              return cache.get(key);
+            }
+
+            @Override
+            public Map<String, Object> loadAll(Iterable<? extends String> keys)
+                throws CacheLoaderException {
+              Map<String, Object> kvp = new HashMap<String, Object>();
+              for (String key : keys) {
+                kvp.put(key, cache.get(key));
+              }
+              return kvp;
+            }
+          };
+    }
+    this.elapsedTime = Stopwatch.createUnstarted();
+    this.statementCache = new EvictTrackingMapCache<String, Object>(null, "UOW(" + hashCode() + ")", cacheLoader, true);
+  }
+
+  public void addDatabaseTime(String name, Stopwatch amount) {
+    Double time = databaseTime.get(name);
+    if (time == null) {
+      databaseTime.put(name, (double) amount.elapsed(TimeUnit.MICROSECONDS));
+    } else {
+      databaseTime.put(name, time + amount.elapsed(TimeUnit.MICROSECONDS));
+    }
+  }
+
+  public void addCacheLookupTime(Stopwatch amount) {
+    cacheLookupTimeMSecs += amount.elapsed(TimeUnit.MICROSECONDS);
+  }
+
+  public void addNestedUnitOfWork(UnitOfWork uow) {
+    synchronized (nested) {
+      nested.add(uow);
+    }
   }
 
   /**
-	 * Marks the beginning of a transactional section of work. Will write a record
-	 * to the shared write-ahead log.
+   * Marks the beginning of a transactional section of work. Will write a
+   * recordCacheAndDatabaseOperationCount to the shared write-ahead log.
    *
    * @return the handle used to commit or abort the work.
    */
-	public UnitOfWork begin() {
-		if (nested == null) {
-			nested = new ArrayList<UnitOfWork>();
+  public synchronized UnitOfWork begin() {
+    elapsedTime.start();
+    // log.record(txn::start)
+    return this;
   }
-		UnitOfWork unitOfWork = new UnitOfWork(session);
-		nested.add(unitOfWork);
-		return unitOfWork;
+
+  public String getPurpose() {
+    return purpose;
+  }
+
+  public UnitOfWork setPurpose(String purpose) {
+    this.purpose = purpose;
+    return this;
+  }
+
+  public void addFuture(CompletableFuture<?> future) {
+    asyncOperationFutures.add(future);
+  }
+
+  public void setInfo(String info) {
+    this.info = info;
+  }
+
+  public void recordCacheAndDatabaseOperationCount(int cache, int ops) {
+    if (cache > 0) {
+      cacheHits += cache;
+    } else {
+      cacheMisses += Math.abs(cache);
+    }
+    if (ops > 0) {
+      databaseLookups += ops;
+    }
+  }
+
+  public String logTimers(String what) {
+    double e = (double) elapsedTime.elapsed(TimeUnit.MICROSECONDS) / 1000.0;
+    double d = 0.0;
+    double c = cacheLookupTimeMSecs / 1000.0;
+    double fc = (c / e) * 100.0;
+    String database = "";
+    if (databaseTime.size() > 0) {
+      List<String> dbt = new ArrayList<>(databaseTime.size());
+      for (Map.Entry<String, Double> dt : databaseTime.entrySet()) {
+        double t = dt.getValue() / 1000.0;
+        d += t;
+        dbt.add(String.format("%s took %,.3fms %,2.2f%%", dt.getKey(), t, (t / e) * 100.0));
+      }
+      double fd = (d / e) * 100.0;
+      database =
+          String.format(
+              ", %d quer%s (%,.3fms %,2.2f%% - %s)",
+              databaseLookups, (databaseLookups > 1) ? "ies" : "y", d, fd, String.join(", ", dbt));
+    }
+    String cache = "";
+    if (cacheLookupTimeMSecs > 0) {
+      int cacheLookups = cacheHits + cacheMisses;
+      cache =
+          String.format(
+              " with %d cache lookup%s (%,.3fms %,2.2f%% - %,d hit, %,d miss)",
+              cacheLookups, cacheLookups > 1 ? "s" : "", c, fc, cacheHits, cacheMisses);
+    }
+    String da = "";
+    if (databaseTime.size() > 0 || cacheLookupTimeMSecs > 0) {
+      double dat = d + c;
+      double daf = (dat / e) * 100;
+      da =
+          String.format(
+              " consuming %,.3fms for data access, or %,2.2f%% of total UOW time.", dat, daf);
+    }
+    String x = nestedPurposes.stream().distinct().collect(Collectors.joining(", "));
+    String n =
+        nested
+            .stream()
+            .map(uow -> String.valueOf(uow.hashCode()))
+            .collect(Collectors.joining(", "));
+    String s =
+        String.format(
+            Locale.US,
+            "UOW(%s%s) %s in %,.3fms%s%s%s%s%s%s",
+            hashCode(),
+            (nested.size() > 0 ? ", [" + n + "]" : ""),
+            what,
+            e,
+            cache,
+            database,
+            da,
+            (purpose == null ? "" : " " + purpose),
+            (nestedPurposes.isEmpty()) ? "" : ", " + x,
+            (info == null) ? "" : " " + info);
+    return s;
+  }
+
+  private void applyPostCommitFunctions(String what, List<CheckedRunnable> thunks, Consumer<? super Throwable> exceptionallyThunk) {
+    if (!thunks.isEmpty()) {
+      for (CheckedRunnable f : thunks) {
+          try {
+              f.run();
+          } catch (Throwable t) {
+              if (exceptionallyThunk != null) {
+                  exceptionallyThunk.accept(t);
+              }
+          }
+      }
+    }
+  }
+
+  public Optional<Object> cacheLookup(List<Facet> facets) {
+    String tableName = CacheUtil.schemaName(facets);
+    Optional<Object> result = Optional.empty();
+    for (Facet facet : facets) {
+      if (!facet.fixed()) {
+        String columnName = facet.name() + "==" + facet.value();
+        Either<Object, List<Facet>> eitherValue = cache.get(tableName, columnName);
+        if (eitherValue != null) {
+          Object value = deleted;
+          if (eitherValue.isLeft()) {
+            value = eitherValue.getLeft();
+          }
+          return Optional.of(value);
+        }
+      }
+    }
+
+    // Be sure to check all enclosing UnitOfWork caches as well, we may be nested.
+    result = checkParentCache(facets);
+    if (result.isPresent()) {
+      Object r = result.get();
+      Class<?> iface = MappingUtil.getMappingInterface(r);
+      if (Helenus.entity(iface).isDraftable()) {
+        cacheUpdate(r, facets);
+      } else {
+        cacheUpdate(SerializationUtils.<Serializable>clone((Serializable) r), facets);
+      }
+    }
+    return result;
+  }
+
+  private Optional<Object> checkParentCache(List<Facet> facets) {
+    Optional<Object> result = Optional.empty();
+    if (parent != null) {
+      result = parent.checkParentCache(facets);
+    }
+    return result;
+  }
+
+  public List<Facet> cacheEvict(List<Facet> facets) {
+    Either<Object, List<Facet>> deletedObjectFacets = Either.right(facets);
+    String tableName = CacheUtil.schemaName(facets);
+    Optional<Object> optionalValue = cacheLookup(facets);
+
+    for (Facet facet : facets) {
+      if (!facet.fixed()) {
+        String columnKey = facet.name() + "==" + facet.value();
+        // mark the value identified by the facet to `deleted`
+        cache.put(tableName, columnKey, deletedObjectFacets);
+      }
+    }
+
+    // Now, look for other row/col pairs that referenced the same object, mark them
+    // `deleted` if the cache had a value before we added the deleted marker objects.
+    if (optionalValue.isPresent()) {
+      Object value = optionalValue.get();
+      cache
+          .columnKeySet()
+          .forEach(
+              columnKey -> {
+                Either<Object, List<Facet>> eitherCachedValue = cache.get(tableName, columnKey);
+                if (eitherCachedValue.isLeft()) {
+                  Object cachedValue = eitherCachedValue.getLeft();
+                  if (cachedValue == value) {
+                    cache.put(tableName, columnKey, deletedObjectFacets);
+                    String[] parts = columnKey.split("==");
+                    facets.add(new Facet<String>(parts[0], parts[1]));
+                  }
+                }
+              });
+    }
+    return facets;
+  }
+
+  public Cache<String, Object> getCache() {
+    return statementCache;
+  }
+
+  public Object cacheUpdate(Object value, List<Facet> facets) {
+    Object result = null;
+    String tableName = CacheUtil.schemaName(facets);
+    for (Facet facet : facets) {
+      if (!facet.fixed()) {
+        if (facet.alone()) {
+          String columnName = facet.name() + "==" + facet.value();
+          if (result == null) result = cache.get(tableName, columnName);
+          cache.put(tableName, columnName, Either.left(value));
+        }
+      }
+    }
+    return result;
+  }
+
+  public void batch(AbstractOperation s) {
+    if (batch == null) {
+      batch = new BatchOperation(session);
+    }
+    batch.add(s);
+  }
+
+  private Iterator<UnitOfWork> getChildNodes() {
+    return nested.iterator();
   }
 
   /**
-	 * Checks to see if the work performed between calling begin and now can be
-	 * committed or not.
+   * Checks to see if the work performed between calling begin and now can be committed or not.
    *
-	 * @throws ConflictingUnitOfWorkException
-	 *             when the work overlaps with other concurrent writers.
+   * @return a function from which to chain work that only happens when commit is successful
+   * @throws HelenusException when the work overlaps with other concurrent writers.
    */
-	public void commit() throws ConflictingUnitOfWorkException {
-		// nested.foreach.commit()
-		// log.record(txn::provisionalCommit)
-		// examine log for conflicts in read-set and write-set between begin and
-		// provisional commit
-		// if (conflict) { throw new ConflictingUnitOfWorkException(this) }
+  public synchronized PostCommitFunction<Void, Void> commit() throws HelenusException {
+
+    if (isDone()) {
+      return PostCommitFunction.NULL_ABORT;
+    }
+
+    // Only the outer-most UOW batches statements for commit time, execute them.
+    if (batch != null) {
+      committedAt = batch.sync(this); //TODO(gburd): update cache with writeTime...
+    }
+
+    // All nested UnitOfWork should be committed (not aborted) before calls to
+    // commit, check.
+    boolean canCommit = true;
+    TreeTraverser<UnitOfWork> traverser = TreeTraverser.using(node -> node::getChildNodes);
+    for (UnitOfWork uow : traverser.postOrderTraversal(this)) {
+      if (this != uow) {
+        canCommit &= (!uow.aborted && uow.committed);
+      }
+    }
+
+    if (!canCommit) {
+
+      if (parent == null) {
+
+        // Apply all post-commit abort functions, this is the outer-most UnitOfWork.
+        traverser
+            .postOrderTraversal(this)
+            .forEach(
+                uow -> {
+                  applyPostCommitFunctions("aborted", abortThunks, exceptionallyThunk);
+                });
+
+        elapsedTime.stop();
+        if (LOG.isInfoEnabled()) {
+          LOG.info(logTimers("aborted"));
+        }
+      }
+
+      return PostCommitFunction.NULL_ABORT;
+    } else {
+      committed = true;
+      aborted = false;
+
+      if (parent == null) {
+
+        // Apply all post-commit commit functions, this is the outer-most UnitOfWork.
+        traverser
+            .postOrderTraversal(this)
+            .forEach(
+                uow -> {
+                  applyPostCommitFunctions("committed", uow.commitThunks, exceptionallyThunk);
+                });
+
+        // Merge our statement cache into the session cache if it exists.
+        CacheManager cacheManager = session.getCacheManager();
+        if (cacheManager != null) {
+          for (Map.Entry<String, Object> entry :
+              (Set<Map.Entry<String, Object>>) statementCache.<Map>unwrap(Map.class).entrySet()) {
+            String[] keyParts = entry.getKey().split("\\.");
+            if (keyParts.length == 2) {
+              String cacheName = keyParts[0];
+              String key = keyParts[1];
+              if (!StringUtils.isBlank(cacheName) && !StringUtils.isBlank(key)) {
+                Cache<Object, Object> cache = cacheManager.getCache(cacheName);
+                if (cache != null) {
+                  Object value = entry.getValue();
+                  if (value == deleted) {
+                    cache.remove(key);
+                  } else {
+                    cache.put(key.toString(), value);
+                  }
+                }
+              }
+            }
+          }
+        }
+
+        // Merge our cache into the session cache.
+        session.mergeCache(cache);
+
+        // Spoil any lingering futures that may be out there.
+        asyncOperationFutures.forEach(
+            f ->
+                f.completeExceptionally(
+                    new HelenusException(
+                        "Futures must be resolved before their unit of work has committed/aborted.")));
+
+        elapsedTime.stop();
+        if (LOG.isInfoEnabled()) {
+          LOG.info(logTimers("committed"));
+        }
+
+        return PostCommitFunction.NULL_COMMIT;
+      } else {
+        // Merge cache and statistics into parent if there is one.
+        parent.statementCache.putAll(statementCache.<Map>unwrap(Map.class));
+        parent.statementCache.removeAll(statementCache.getDeletions());
+        parent.mergeCache(cache);
+        parent.addBatched(batch);
+        if (purpose != null) {
+          parent.nestedPurposes.add(purpose);
+        }
+        parent.cacheHits += cacheHits;
+        parent.cacheMisses += cacheMisses;
+        parent.databaseLookups += databaseLookups;
+        parent.cacheLookupTimeMSecs += cacheLookupTimeMSecs;
+        for (Map.Entry<String, Double> dt : databaseTime.entrySet()) {
+          String name = dt.getKey();
+          if (parent.databaseTime.containsKey(name)) {
+            double t = parent.databaseTime.get(name);
+            parent.databaseTime.put(name, t + dt.getValue());
+          } else {
+            parent.databaseTime.put(name, dt.getValue());
+          }
+        }
+      }
+    }
+    // TODO(gburd): hopefully we'll be able to detect conflicts here and so we'd want to...
+    // else {
+    // Constructor<T> ctor = clazz.getConstructor(conflictExceptionClass);
+    // T object = ctor.newInstance(new Object[] { String message });
+    // }
+    return new PostCommitFunction<Void, Void>(commitThunks, abortThunks, exceptionallyThunk, true);
+  }
+
+  private void addBatched(BatchOperation batchArg) {
+    if (batchArg != null) {
+      if (this.batch == null) {
+        this.batch = batchArg;
+      } else {
+        this.batch.addAll(batchArg);
+      }
+    }
   }
 
   /**
-	 * Explicitly discard the work and mark it as as such in the log.
+   * Explicitly abort the work within this unit of work. Any nested aborted unit of work will
+   * trigger the entire unit of work to commit.
    */
-	public void abort() {
+  public synchronized void abort() {
+    if (!aborted) {
+      aborted = true;
+
+      // Spoil any pending futures created within the context of this unit of work.
+      asyncOperationFutures.forEach(
+          f ->
+              f.completeExceptionally(
+                  new HelenusException(
+                      "Futures must be resolved before their unit of work has committed/aborted.")));
+
+      TreeTraverser<UnitOfWork> traverser = TreeTraverser.using(node -> node::getChildNodes);
+      traverser
+          .postOrderTraversal(this)
+          .forEach(
+              uow -> {
+                applyPostCommitFunctions("aborted", uow.abortThunks, exceptionallyThunk);
+                uow.abortThunks.clear();
+              });
+
+      if (parent == null) {
+        if (elapsedTime.isRunning()) {
+          elapsedTime.stop();
+        }
+        if (LOG.isInfoEnabled()) {
+          LOG.info(logTimers("aborted"));
+        }
+      }
+
+      // TODO(gburd): when we integrate the transaction support we'll need to...
       // log.record(txn::abort)
       // cache.invalidateSince(txn::start time)
     }
+  }
+
+  private void mergeCache(Table<String, String, Either<Object, List<Facet>>> from) {
+    Table<String, String, Either<Object, List<Facet>>> to = this.cache;
+    from.rowMap()
+        .forEach(
+            (rowKey, columnMap) -> {
+              columnMap.forEach(
+                  (columnKey, value) -> {
+                    if (to.contains(rowKey, columnKey)) {
+                      to.put(
+                          rowKey,
+                          columnKey,
+                          Either.left(
+                              CacheUtil.merge(
+                                  to.get(rowKey, columnKey).getLeft(),
+                                  from.get(rowKey, columnKey).getLeft())));
+                    } else {
+                      to.put(rowKey, columnKey, from.get(rowKey, columnKey));
+                    }
+                  });
+            });
+  }
+
+  public boolean isDone() {
+    return aborted || committed;
+  }
 
   public String describeConflicts() {
     return "it's complex...";
   }
 
+  @Override
+  public void close() throws HelenusException {
+    // Closing a UnitOfWork will abort iff we've not already aborted or committed this unit of work.
+    if (aborted == false && committed == false) {
+      abort();
+    }
+  }
+
+  public boolean hasAborted() {
+    return aborted;
+  }
+
+  public boolean hasCommitted() {
+    return committed;
+  }
+
+  public long committedAt() {
+    return committedAt;
+  }
+
+ private static class EvictTrackingMapCache<K, V> implements Cache<K, V> {
+      private final Set<K> deletes;
+      private final Cache<K, V> delegate;
+
+      public EvictTrackingMapCache(CacheManager manager, String name, CacheLoader<K, V> cacheLoader,
+              boolean isReadThrough) {
+          deletes = Collections.synchronizedSet(new HashSet<>());
+          delegate = new MapCache<>(manager, name, cacheLoader, isReadThrough);
+      }
+
+      /** Non-interface method; should only be called by UnitOfWork when merging to an enclosing UnitOfWork. */
+      public Set<K> getDeletions() {
+          return new HashSet<>(deletes);
+      }
+
+      @Override
+      public V get(K key) {
+          if (deletes.contains(key)) {
+              return null;
+          }
+
+          return delegate.get(key);
+      }
+
+      @Override
+      public Map<K, V> getAll(Set<? extends K> keys) {
+          Set<? extends K> clonedKeys = new HashSet<>(keys);
+          clonedKeys.removeAll(deletes);
+          return delegate.getAll(clonedKeys);
+      }
+
+      @Override
+      public boolean containsKey(K key) {
+          if (deletes.contains(key)) {
+              return false;
+          }
+
+          return delegate.containsKey(key);
+      }
+
+      @Override
+      public void loadAll(Set<? extends K> keys, boolean replaceExistingValues, CompletionListener listener) {
+          Set<? extends K> clonedKeys = new HashSet<>(keys);
+          clonedKeys.removeAll(deletes);
+          delegate.loadAll(clonedKeys, replaceExistingValues, listener);
+      }
+
+      @Override
+      public void put(K key, V value) {
+          if (deletes.contains(key)) {
+              deletes.remove(key);
+          }
+
+          delegate.put(key, value);
+      }
+
+      @Override
+      public V getAndPut(K key, V value) {
+          if (deletes.contains(key)) {
+              deletes.remove(key);
+          }
+
+          return delegate.getAndPut(key, value);
+      }
+
+      @Override
+      public void putAll(Map<? extends K, ? extends V> map) {
+          deletes.removeAll(map.keySet());
+          delegate.putAll(map);
+      }
+
+      @Override
+      public synchronized boolean putIfAbsent(K key, V value) {
+          if (!delegate.containsKey(key) && deletes.contains(key)) {
+              deletes.remove(key);
+          }
+
+          return delegate.putIfAbsent(key,  value);
+      }
+
+      @Override
+      public boolean remove(K key) {
+          boolean removed = delegate.remove(key);
+          deletes.add(key);
+          return removed;
+      }
+
+      @Override
+      public boolean remove(K key, V value) {
+          boolean removed = delegate.remove(key, value);
+          if (removed) {
+              deletes.add(key);
+          }
+
+          return removed;
+      }
+
+      @Override
+      public V getAndRemove(K key) {
+          V value = delegate.getAndRemove(key);
+          deletes.add(key);
+          return value;
+      }
+
+      @Override
+      public void removeAll(Set<? extends K> keys) {
+          Set<? extends K> cloneKeys = new HashSet<>(keys);
+          delegate.removeAll(cloneKeys);
+          deletes.addAll(cloneKeys);
+      }
+
+      @Override
+      @SuppressWarnings("unchecked")
+      public synchronized void removeAll() {
+          Map<K, V> impl = delegate.unwrap(Map.class);
+          Set<K> keys = impl.keySet();
+          delegate.removeAll();
+          deletes.addAll(keys);
+      }
+
+      @Override
+      public void clear() {
+          delegate.clear();
+          // TODO(gburd): all parents too
+          deletes.clear();
+      }
+
+    @Override
+    public boolean replace(K key, V oldValue, V newValue) {
+        if (deletes.contains(key)) {
+            return false;
+        }
+
+        return delegate.replace(key, oldValue, newValue);
+    }
+
+    @Override
+    public boolean replace(K key, V value) {
+        if (deletes.contains(key)) {
+            return false;
+        }
+
+        return delegate.replace(key, value);
+    }
+
+    @Override
+    public V getAndReplace(K key, V value) {
+        if (deletes.contains(key)) {
+            return null;
+        }
+
+        return delegate.getAndReplace(key, value);
+    }
+
+    @Override
+    public <C extends Configuration<K, V>> C getConfiguration(Class<C> clazz) {
+        return delegate.getConfiguration(clazz);
+    }
+
+    @Override
+    public <T> T invoke(K key, EntryProcessor<K, V, T> processor, Object... arguments)
+            throws EntryProcessorException {
+        if (deletes.contains(key)) {
+            return null;
+        }
+
+        return delegate.invoke(key,  processor, arguments);
+    }
+
+    @Override
+    public <T> Map<K, EntryProcessorResult<T>> invokeAll(Set<? extends K> keys, EntryProcessor<K, V, T> processor,
+            Object... arguments) {
+        Set<? extends K> clonedKeys = new HashSet<>(keys);
+        clonedKeys.removeAll(deletes);
+        return delegate.invokeAll(clonedKeys, processor, arguments);
+    }
+
+    @Override
+    public String getName() {
+        return delegate.getName();
+    }
+
+    @Override
+    public CacheManager getCacheManager() {
+        return delegate.getCacheManager();
+    }
+
+    @Override
+    public void close() {
+        delegate.close();
+    }
+
+    @Override
+    public boolean isClosed() {
+        return delegate.isClosed();
+    }
+
+    @Override
+    public <T> T unwrap(Class<T> clazz) {
+        return delegate.unwrap(clazz);
+    }
+
+    @Override
+    public void registerCacheEntryListener(CacheEntryListenerConfiguration<K, V> cacheEntryListenerConfiguration) {
+        delegate.registerCacheEntryListener(cacheEntryListenerConfiguration);
+    }
+
+    @Override
+    public void deregisterCacheEntryListener(CacheEntryListenerConfiguration<K, V> cacheEntryListenerConfiguration) {
+        delegate.deregisterCacheEntryListener(cacheEntryListenerConfiguration);
+    }
+
+    @Override
+    public Iterator<Entry<K, V>> iterator() {
+        return delegate.iterator();
+    }
+  }
 }

src/main/java/net/helenus/core/UserTypeOperations.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,11 +16,9 @@
  */
 package net.helenus.core;
 
-import java.util.List;
-
 import com.datastax.driver.core.UserType;
 import com.datastax.driver.core.schemabuilder.SchemaStatement;
-
+import java.util.List;
 import net.helenus.mapping.HelenusEntity;
 import net.helenus.support.HelenusException;
 
@@ -35,14 +34,12 @@ public final class UserTypeOperations {
 
   public void createUserType(HelenusEntity entity) {
 
-		sessionOps.execute(SchemaUtil.createUserType(entity), true);
-
+    sessionOps.execute(SchemaUtil.createUserType(entity));
   }
 
   public void dropUserType(HelenusEntity entity) {
 
-        sessionOps.execute(SchemaUtil.dropUserType(entity), true);
-
+    sessionOps.execute(SchemaUtil.dropUserType(entity));
   }
 
   public void validateUserType(UserType userType, HelenusEntity entity) {
@@ -56,9 +53,11 @@ public final class UserTypeOperations {
 
     if (!list.isEmpty()) {
       throw new HelenusException(
-					"schema changed for entity " + entity.getMappingInterface() + ", apply this command: " + list);
+          "schema changed for entity "
+              + entity.getMappingInterface()
+              + ", apply this command: "
+              + list);
     }
-
   }
 
   public void updateUserType(UserType userType, HelenusEntity entity) {
@@ -69,15 +68,10 @@ public final class UserTypeOperations {
     }
 
     executeBatch(SchemaUtil.alterUserType(userType, entity, dropUnusedColumns));
-
   }
 
   private void executeBatch(List<SchemaStatement> list) {
 
-		list.forEach(s -> {
-			sessionOps.execute(s, true);
-		});
-
+    list.forEach(s -> sessionOps.execute(s));
   }
-
 }

src/main/java/net/helenus/core/annotation/Cacheable.java

@@ -1,3 +1,19 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
 package net.helenus.core.annotation;
 
 import java.lang.annotation.ElementType;
@@ -7,5 +23,4 @@ import java.lang.annotation.Target;
 
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.TYPE)
-public @interface Cacheable {
-}
+public @interface Cacheable {}

src/main/java/net/helenus/core/annotation/Retry.java

@@ -1,17 +1,36 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
 package net.helenus.core.annotation;
 
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
-
+import java.util.concurrent.TimeoutException;
 import net.helenus.core.ConflictingUnitOfWorkException;
 
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.METHOD)
 public @interface Retry {
 
-	Class<? extends Exception>[] on() default ConflictingUnitOfWorkException.class;
+  Class<? extends Exception>[] on() default {
+    ConflictingUnitOfWorkException.class, TimeoutException.class
+  };
 
   int times() default 3;
 }

src/main/java/net/helenus/core/aspect/RetryAspect.java

@@ -0,0 +1,98 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package net.helenus.core.aspect;
+
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import net.helenus.core.annotation.Retry;
+import org.apache.commons.lang3.exception.ExceptionUtils;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.reflect.MethodSignature;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.core.annotation.AnnotationUtils;
+import org.springframework.util.Assert;
+
+@Aspect
+public class RetryAspect {
+
+  private static final Logger log = LoggerFactory.getLogger(RetryAspect.class);
+
+  @Around("@annotation(net.helenus.core.annotations.Retry)")
+  public Object retry(ProceedingJoinPoint pjp) throws Throwable {
+    Retry retryAnnotation = getRetryAnnotation(pjp);
+    return (retryAnnotation != null) ? proceed(pjp, retryAnnotation) : proceed(pjp);
+  }
+
+  private Object proceed(ProceedingJoinPoint pjp) throws Throwable {
+    return pjp.proceed();
+  }
+
+  private Object proceed(ProceedingJoinPoint pjp, Retry retryAnnotation) throws Throwable {
+    int times = retryAnnotation.times();
+    Class<? extends Throwable>[] retryOn = retryAnnotation.on();
+    Assert.isTrue(times > 0, "@Retry{times} should be greater than 0!");
+    Assert.isTrue(retryOn.length > 0, "@Retry{on} should have at least one Throwable!");
+    log.info("Proceed with {} retries on {}", times, Arrays.toString(retryOn));
+    return tryProceeding(pjp, times, retryOn);
+  }
+
+  private Object tryProceeding(
+      ProceedingJoinPoint pjp, int times, Class<? extends Throwable>[] retryOn) throws Throwable {
+    try {
+      return proceed(pjp);
+    } catch (Throwable throwable) {
+      if (isRetryThrowable(throwable, retryOn) && times-- > 0) {
+        log.info("Conflict detected, {} remaining retries on {}", times, Arrays.toString(retryOn));
+        return tryProceeding(pjp, times, retryOn);
+      }
+      throw throwable;
+    }
+  }
+
+  private boolean isRetryThrowable(Throwable throwable, Class<? extends Throwable>[] retryOn) {
+    Throwable[] causes = ExceptionUtils.getThrowables(throwable);
+    for (Throwable cause : causes) {
+      for (Class<? extends Throwable> retryThrowable : retryOn) {
+        if (retryThrowable.isAssignableFrom(cause.getClass())) {
+          return true;
+        }
+      }
+    }
+    return false;
+  }
+
+  private Retry getRetryAnnotation(ProceedingJoinPoint pjp) throws NoSuchMethodException {
+    MethodSignature signature = (MethodSignature) pjp.getSignature();
+    Method method = signature.getMethod();
+    Retry retryAnnotation = AnnotationUtils.findAnnotation(method, Retry.class);
+
+    if (retryAnnotation != null) {
+      return retryAnnotation;
+    }
+
+    Class<?>[] argClasses = new Class[pjp.getArgs().length];
+    for (int i = 0; i < pjp.getArgs().length; i++) {
+      argClasses[i] = pjp.getArgs()[i].getClass();
+    }
+    method = pjp.getTarget().getClass().getMethod(pjp.getSignature().getName(), argClasses);
+    return AnnotationUtils.findAnnotation(method, Retry.class);
+  }
+}

src/main/java/net/helenus/core/aspect/RetryConcurrentUnitOfWorkAspect.java

@@ -2,7 +2,7 @@ package net.helenus.core.aspect;
 
 import java.lang.reflect.Method;
 import java.util.Arrays;
-
+import net.helenus.core.annotation.Retry;
 import org.apache.commons.lang3.exception.ExceptionUtils;
 import org.aspectj.lang.ProceedingJoinPoint;
 import org.aspectj.lang.annotation.Around;
@@ -13,8 +13,6 @@ import org.slf4j.LoggerFactory;
 import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.util.Assert;
 
-import net.helenus.core.annotation.Retry;
-
 @Aspect
 public class RetryConcurrentUnitOfWorkAspect {
 
@@ -39,8 +37,8 @@ public class RetryConcurrentUnitOfWorkAspect {
     return tryProceeding(pjp, times, retryOn);
   }
 
-	private Object tryProceeding(ProceedingJoinPoint pjp, int times, Class<? extends Throwable>[] retryOn)
-			throws Throwable {
+  private Object tryProceeding(
+      ProceedingJoinPoint pjp, int times, Class<? extends Throwable>[] retryOn) throws Throwable {
     try {
       return proceed(pjp);
     } catch (Throwable throwable) {

src/main/java/net/helenus/core/cache/BoundFacet.java

@@ -0,0 +1,60 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+package net.helenus.core.cache;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+import net.helenus.mapping.HelenusProperty;
+
+public class BoundFacet extends Facet<String> {
+  private final Map<HelenusProperty, Object> properties;
+
+  public BoundFacet(HelenusProperty property, Object value) {
+    super(property.getPropertyName(), value == null ? null : value.toString());
+    this.properties = new HashMap<HelenusProperty, Object>(1);
+    this.properties.put(property, value);
+  }
+
+  public Set<HelenusProperty> getProperties() {
+    return properties.keySet();
+  }
+
+  public BoundFacet(String name, Map<HelenusProperty, Object> properties) {
+    super(
+        name,
+        (properties.keySet().size() > 1)
+            ? "["
+                + String.join(
+                    ", ",
+                    properties
+                        .keySet()
+                        .stream()
+                        .map(key -> properties.get(key).toString())
+                        .collect(Collectors.toSet()))
+                + "]"
+            : String.join(
+                "",
+                properties
+                    .keySet()
+                    .stream()
+                    .map(key -> properties.get(key).toString())
+                    .collect(Collectors.toSet())));
+    this.properties = properties;
+  }
+}

src/main/java/net/helenus/core/cache/CacheUtil.java

@@ -0,0 +1,221 @@
+package net.helenus.core.cache;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+import net.helenus.core.Helenus;
+import net.helenus.core.reflect.Entity;
+import net.helenus.core.reflect.MapExportable;
+import net.helenus.mapping.HelenusEntity;
+import net.helenus.mapping.HelenusProperty;
+import net.helenus.mapping.MappingUtil;
+import net.helenus.mapping.value.BeanColumnValueProvider;
+
+public class CacheUtil {
+
+  public static List<String[]> combinations(List<String> items) {
+    int n = items.size();
+    if (n > 20) throw new IllegalArgumentException(n + " is out of range");
+    long e = Math.round(Math.pow(2, n));
+    List<String[]> out = new ArrayList<String[]>((int) e - 1);
+    for (int k = 1; k <= items.size(); k++) {
+      kCombinations(items, 0, k, new String[k], out);
+    }
+    return out;
+  }
+
+  private static void kCombinations(
+      List<String> items, int n, int k, String[] arr, List<String[]> out) {
+    if (k == 0) {
+      out.add(arr.clone());
+    } else {
+      for (int i = n; i <= items.size() - k; i++) {
+        arr[arr.length - k] = items.get(i);
+        kCombinations(items, i + 1, k - 1, arr, out);
+      }
+    }
+  }
+
+  public static List<String> flatKeys(String table, List<Facet> facets) {
+    return flattenFacets(facets)
+        .stream()
+        .map(
+            combination -> {
+              return table + "." + Arrays.toString(combination);
+            })
+        .collect(Collectors.toList());
+  }
+
+  public static List<String[]> flattenFacets(List<Facet> facets) {
+    List<String[]> combinations =
+        CacheUtil.combinations(
+            facets
+                .stream()
+                .filter(facet -> !facet.fixed())
+                .filter(facet -> facet.value() != null)
+                .map(
+                    facet -> {
+                      return facet.name() + "==" + facet.value();
+                    })
+                .collect(Collectors.toList()));
+    // TODO(gburd): rework so as to not generate the combinations at all rather than filter
+    facets =
+        facets
+            .stream()
+            .filter(f -> !f.fixed())
+            .filter(f -> !f.alone() || !f.combined())
+            .collect(Collectors.toList());
+    for (Facet facet : facets) {
+      combinations =
+          combinations
+              .stream()
+              .filter(
+                  combo -> {
+                    // When used alone, this facet is not distinct so don't use it as a key.
+                    if (combo.length == 1) {
+                      if (!facet.alone() && combo[0].startsWith(facet.name() + "==")) {
+                        return false;
+                      }
+                    } else {
+                      if (!facet.combined()) {
+                        for (String c : combo) {
+                          // Don't use this facet in combination with others to create keys.
+                          if (c.startsWith(facet.name() + "==")) {
+                            return false;
+                          }
+                        }
+                      }
+                    }
+                    return true;
+                  })
+              .collect(Collectors.toList());
+    }
+    return combinations;
+  }
+
+  /** Merge changed values in the map behind `from` into `to`. */
+  public static Object merge(Object t, Object f) {
+    HelenusEntity entity = Helenus.resolve(MappingUtil.getMappingInterface(t));
+
+    if (t == f) return t;
+    if (f == null) return t;
+    if (t == null) return f;
+
+    if (t instanceof MapExportable
+        && t instanceof Entity
+        && f instanceof MapExportable
+        && f instanceof Entity) {
+      Entity to = (Entity) t;
+      Entity from = (Entity) f;
+      Map<String, Object> toValueMap = ((MapExportable) to).toMap();
+      Map<String, Object> fromValueMap = ((MapExportable) from).toMap();
+      for (HelenusProperty prop : entity.getOrderedProperties()) {
+        switch (prop.getColumnType()) {
+          case PARTITION_KEY:
+          case CLUSTERING_COLUMN:
+            continue;
+          default:
+            Object toVal = BeanColumnValueProvider.INSTANCE.getColumnValue(to, -1, prop, false);
+            Object fromVal = BeanColumnValueProvider.INSTANCE.getColumnValue(from, -1, prop, false);
+            String ttlKey = ttlKey(prop);
+            String writeTimeKey = writeTimeKey(prop);
+            int[] toTtlI = (int[]) toValueMap.get(ttlKey);
+            int toTtl = (toTtlI != null) ? toTtlI[0] : 0;
+            Long toWriteTime = (Long) toValueMap.get(writeTimeKey);
+            int[] fromTtlI = (int[]) fromValueMap.get(ttlKey);
+            int fromTtl = (fromTtlI != null) ? fromTtlI[0] : 0;
+            Long fromWriteTime = (Long) fromValueMap.get(writeTimeKey);
+
+            if (toVal != null) {
+              if (fromVal != null) {
+                if (toVal == fromVal) {
+                  // Case: object identity
+                  // Goal: ensure write time and ttl are also in sync
+                  if (fromWriteTime != null
+                      && fromWriteTime != 0L
+                      && (toWriteTime == null || fromWriteTime > toWriteTime)) {
+                    ((MapExportable) to).put(writeTimeKey, fromWriteTime);
+                  }
+                  if (fromTtl > 0 && fromTtl > toTtl) {
+                    ((MapExportable) to).put(ttlKey, fromTtl);
+                  }
+                } else if (fromWriteTime != null && fromWriteTime != 0L) {
+                  // Case: to exists and from exists
+                  // Goal: copy over from -> to iff from.writeTime > to.writeTime
+                  if (toWriteTime != null && toWriteTime != 0L) {
+                    if (fromWriteTime > toWriteTime) {
+                      ((MapExportable) to).put(prop.getPropertyName(), fromVal);
+                      ((MapExportable) to).put(writeTimeKey, fromWriteTime);
+                      if (fromTtl > 0) {
+                        ((MapExportable) to).put(ttlKey, fromTtl);
+                      }
+                    }
+                  } else {
+                    ((MapExportable) to).put(prop.getPropertyName(), fromVal);
+                    ((MapExportable) to).put(writeTimeKey, fromWriteTime);
+                    if (fromTtl > 0) {
+                      ((MapExportable) to).put(ttlKey, fromTtl);
+                    }
+                  }
+                } else {
+                  if (toWriteTime == null || toWriteTime == 0L) {
+                    // Caution, entering grey area...
+                    if (!toVal.equals(fromVal)) {
+                      // dangerous waters here, values diverge without information that enables resolution,
+                      // policy (for now) is to move value from -> to anyway.
+                      ((MapExportable) to).put(prop.getPropertyName(), fromVal);
+                      if (fromTtl > 0) {
+                        ((MapExportable) to).put(ttlKey, fromTtl);
+                      }
+                    }
+                  }
+                }
+              }
+            } else {
+              // Case: from exists, but to doesn't (it's null)
+              // Goal: copy over from -> to, include ttl and writeTime if present
+              if (fromVal != null) {
+                ((MapExportable) to).put(prop.getPropertyName(), fromVal);
+                if (fromWriteTime != null && fromWriteTime != 0L) {
+                  ((MapExportable) to).put(writeTimeKey, fromWriteTime);
+                }
+                if (fromTtl > 0) {
+                  ((MapExportable) to).put(ttlKey, fromTtl);
+                }
+              }
+            }
+        }
+      }
+      return to;
+    }
+    return t;
+  }
+
+  public static String schemaName(List<Facet> facets) {
+    return facets
+        .stream()
+        .filter(Facet::fixed)
+        .map(facet -> facet.value().toString())
+        .collect(Collectors.joining("."));
+  }
+
+  public static String writeTimeKey(HelenusProperty prop) {
+    return writeTimeKey(prop.getColumnName().toCql(false));
+  }
+
+  public static String ttlKey(HelenusProperty prop) {
+    return ttlKey(prop.getColumnName().toCql(false));
+  }
+
+  public static String writeTimeKey(String columnName) {
+    String key = "_" + columnName + "_writeTime";
+    return key.toLowerCase();
+  }
+
+  public static String ttlKey(String columnName) {
+    String key = "_" + columnName + "_ttl";
+    return key.toLowerCase();
+  }
+}

src/main/java/net/helenus/core/cache/Facet.java

@@ -0,0 +1,69 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package net.helenus.core.cache;
+
+/** An Entity is identifiable via one or more Facets */
+public class Facet<T> {
+  private final String name;
+  private T value;
+  private boolean fixed = false;
+  private boolean alone = true;
+  private boolean combined = true;
+
+  public Facet(String name) {
+    this.name = name;
+  }
+
+  public Facet(String name, T value) {
+    this.name = name;
+    this.value = value;
+  }
+
+  public String name() {
+    return name;
+  }
+
+  public T value() {
+    return value;
+  }
+
+  public Facet setFixed() {
+    fixed = true;
+    return this;
+  }
+
+  public boolean fixed() {
+    return fixed;
+  }
+
+  public void setUniquelyIdentifyingWhenAlone(boolean alone) {
+    this.alone = alone;
+  }
+
+  public void setUniquelyIdentifyingWhenCombined(boolean combined) {
+    this.combined = combined;
+  }
+
+  public boolean alone() {
+    return alone;
+  }
+
+  public boolean combined() {
+    return combined;
+  }
+}

src/main/java/net/helenus/core/cache/MapCache.java

@@ -0,0 +1,463 @@
+package net.helenus.core.cache;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import javax.cache.Cache;
+import javax.cache.CacheManager;
+import javax.cache.configuration.CacheEntryListenerConfiguration;
+import javax.cache.configuration.Configuration;
+import javax.cache.event.CacheEntryRemovedListener;
+import javax.cache.integration.CacheLoader;
+import javax.cache.integration.CompletionListener;
+import javax.cache.processor.EntryProcessor;
+import javax.cache.processor.EntryProcessorException;
+import javax.cache.processor.EntryProcessorResult;
+import javax.cache.processor.MutableEntry;
+
+public class MapCache<K, V> implements Cache<K, V> {
+  private final CacheManager manager;
+  private final String name;
+  private Map<K, V> map = new ConcurrentHashMap<>();
+  private Set<CacheEntryRemovedListener<K, V>> cacheEntryRemovedListeners = new HashSet<>();
+  private CacheLoader<K, V> cacheLoader = null;
+  private boolean isReadThrough = false;
+
+  private static class MapConfiguration<K, V> implements Configuration<K, V> {
+    private static final long serialVersionUID = 6093947542772516209L;
+
+    @Override
+    public Class<K> getKeyType() {
+      return null;
+    }
+
+    @Override
+    public Class<V> getValueType() {
+      return null;
+    }
+
+    @Override
+    public boolean isStoreByValue() {
+      return false;
+    }
+  }
+
+  public MapCache(
+      CacheManager manager, String name, CacheLoader<K, V> cacheLoader, boolean isReadThrough) {
+    this.manager = manager;
+    this.name = name;
+    this.cacheLoader = cacheLoader;
+    this.isReadThrough = isReadThrough;
+  }
+
+
+  /** {@inheritDoc} */
+  @Override
+  public V get(K key) {
+    V value = null;
+    synchronized (map) {
+      value = map.get(key);
+      if (value == null && isReadThrough && cacheLoader != null) {
+        V loadedValue = cacheLoader.load(key);
+        if (loadedValue != null) {
+          map.put(key, loadedValue);
+          value = loadedValue;
+        }
+      }
+    }
+    return value;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public Map<K, V> getAll(Set<? extends K> keys) {
+    Map<K, V> result = null;
+    synchronized (map) {
+      result = new HashMap<K, V>(keys.size());
+      Iterator<? extends K> it = keys.iterator();
+      while (it.hasNext()) {
+        K key = it.next();
+        V value = map.get(key);
+        if (value != null) {
+          result.put(key, value);
+          it.remove();
+        }
+      }
+      if (keys.size() != 0 && isReadThrough && cacheLoader != null) {
+        Map<K, V> loadedValues = cacheLoader.loadAll(keys);
+        for (Map.Entry<K, V> entry : loadedValues.entrySet()) {
+          V v = entry.getValue();
+          if (v != null) {
+            K k = entry.getKey();
+            map.put(k, v);
+            result.put(k, v);
+          }
+        }
+      }
+    }
+    return result;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public boolean containsKey(K key) {
+    return map.containsKey(key);
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void loadAll(
+      Set<? extends K> keys, boolean replaceExistingValues, CompletionListener completionListener) {
+    if (cacheLoader != null) {
+      try {
+        synchronized (map) {
+          Map<K, V> loadedValues = cacheLoader.loadAll(keys);
+          for (Map.Entry<K, V> entry : loadedValues.entrySet()) {
+            V value = entry.getValue();
+            K key = entry.getKey();
+            if (value != null) {
+              boolean existsCurrently = map.containsKey(key);
+              if (!existsCurrently || replaceExistingValues) {
+                map.put(key, value);
+                keys.remove(key);
+              }
+            }
+          }
+        }
+      } catch (Exception e) {
+        if (completionListener != null) {
+          completionListener.onException(e);
+        }
+      }
+    }
+    if (completionListener != null) {
+      if (keys.isEmpty()) {
+        completionListener.onCompletion();
+      }
+    }
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void put(K key, V value) {
+    map.put(key, value);
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public V getAndPut(K key, V value) {
+    V result = null;
+    synchronized (map) {
+      result = map.get(key);
+      if (result == null && isReadThrough && cacheLoader != null) {
+        V loadedValue = cacheLoader.load(key);
+        if (loadedValue != null) {
+          result = loadedValue;
+        }
+      }
+      map.put(key, value);
+    }
+    return result;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void putAll(Map<? extends K, ? extends V> map) {
+    synchronized (map) {
+      for (Map.Entry<? extends K, ? extends V> entry : map.entrySet()) {
+        this.map.put(entry.getKey(), entry.getValue());
+      }
+    }
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public boolean putIfAbsent(K key, V value) {
+    synchronized (map) {
+      if (!map.containsKey(key)) {
+        map.put(key, value);
+        return true;
+      } else {
+        return false;
+      }
+    }
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public boolean remove(K key) {
+    boolean removed = false;
+    synchronized (map) {
+      removed = map.remove(key) != null;
+      notifyRemovedListeners(key);
+    }
+    return removed;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public boolean remove(K key, V oldValue) {
+    synchronized (map) {
+      V value = map.get(key);
+      if (value != null && oldValue.equals(value)) {
+        map.remove(key);
+        notifyRemovedListeners(key);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public V getAndRemove(K key) {
+    synchronized (map) {
+      V oldValue = null;
+      oldValue = map.get(key);
+      map.remove(key);
+      notifyRemovedListeners(key);
+      return oldValue;
+    }
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public boolean replace(K key, V oldValue, V newValue) {
+    synchronized (map) {
+      V value = map.get(key);
+      if (value != null && oldValue.equals(value)) {
+        map.put(key, newValue);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public boolean replace(K key, V value) {
+    synchronized (map) {
+      if (map.containsKey(key)) {
+        map.put(key, value);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public V getAndReplace(K key, V value) {
+    synchronized (map) {
+      V oldValue = map.get(key);
+      if (value != null && value.equals(oldValue)) {
+        map.put(key, value);
+        return oldValue;
+      }
+    }
+    return null;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void removeAll(Set<? extends K> keys) {
+    synchronized (map) {
+      Iterator<? extends K> it = keys.iterator();
+      while (it.hasNext()) {
+        K key = it.next();
+        if (map.containsKey(key)) {
+          map.remove(key);
+        } else {
+          it.remove();
+        }
+      }
+    }
+    notifyRemovedListeners(keys);
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void removeAll() {
+    synchronized (map) {
+      Set<K> keys = map.keySet();
+      map.clear();
+      notifyRemovedListeners(keys);
+    }
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void clear() {
+    map.clear();
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public <C extends Configuration<K, V>> C getConfiguration(Class<C> clazz) {
+    if (!MapConfiguration.class.isAssignableFrom(clazz)) {
+      throw new IllegalArgumentException();
+    }
+    return null;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public <T> T invoke(K key, EntryProcessor<K, V, T> entryProcessor, Object... arguments)
+      throws EntryProcessorException {
+    // TODO
+    return null;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public <T> Map<K, EntryProcessorResult<T>> invokeAll(
+      Set<? extends K> keys, EntryProcessor<K, V, T> entryProcessor, Object... arguments) {
+    synchronized (map) {
+      for (K key : keys) {
+        V value = map.get(key);
+        if (value != null) {
+          entryProcessor.process(
+              new MutableEntry<K, V>() {
+                @Override
+                public boolean exists() {
+                  return map.containsKey(key);
+                }
+
+                @Override
+                public void remove() {
+                  synchronized (map) {
+                    V value = map.get(key);
+                    if (value != null) {
+                      map.remove(key);
+                      notifyRemovedListeners(key);
+                    }
+                  }
+                }
+
+                @Override
+                public K getKey() {
+                  return key;
+                }
+
+                @Override
+                public V getValue() {
+                  return map.get(value);
+                }
+
+                @Override
+                public <T> T unwrap(Class<T> clazz) {
+                  return null;
+                }
+
+                @Override
+                public void setValue(V value) {
+                  map.put(key, value);
+                }
+              },
+              arguments);
+        }
+      }
+    }
+    return null;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public String getName() {
+    return name;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public CacheManager getCacheManager() {
+    return manager;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void close() {}
+
+  /** {@inheritDoc} */
+  @Override
+  public boolean isClosed() {
+    return false;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  @SuppressWarnings("unchecked")
+  public <T> T unwrap(Class<T> clazz) {
+    if (Map.class.isAssignableFrom(clazz)) {
+        return (T) map;
+    }
+    return null;
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void registerCacheEntryListener(
+      CacheEntryListenerConfiguration<K, V> cacheEntryListenerConfiguration) {
+    //cacheEntryRemovedListeners.add(cacheEntryListenerConfiguration.getCacheEntryListenerFactory().create());
+  }
+
+  /** {@inheritDoc} */
+  @Override
+  public void deregisterCacheEntryListener(
+      CacheEntryListenerConfiguration<K, V> cacheEntryListenerConfiguration) {}
+
+  /** {@inheritDoc} */
+  @Override
+  public Iterator<Entry<K, V>> iterator() {
+    synchronized (map) {
+      return new Iterator<Entry<K, V>>() {
+
+        Iterator<Map.Entry<K, V>> entries = map.entrySet().iterator();
+
+        @Override
+        public boolean hasNext() {
+          return entries.hasNext();
+        }
+
+        @Override
+        public Entry<K, V> next() {
+          Map.Entry<K, V> entry = entries.next();
+          return new Entry<K, V>() {
+            K key = entry.getKey();
+            V value = entry.getValue();
+
+            @Override
+            public K getKey() {
+              return key;
+            }
+
+            @Override
+            public V getValue() {
+              return value;
+            }
+
+            @Override
+            public <T> T unwrap(Class<T> clazz) {
+              return null;
+            }
+          };
+        }
+
+        @Override
+        public void remove() {
+          throw new UnsupportedOperationException();
+        }
+      };
+    }
+  }
+
+  private void notifyRemovedListeners(K key) {
+    //      if (cacheEntryRemovedListeners != null) {
+    //          cacheEntryRemovedListeners.forEach(listener -> listener.onRemoved())
+    //      }
+  }
+
+  private void notifyRemovedListeners(Set<? extends K> keys) {}
+}

src/main/java/net/helenus/core/cache/UnboundFacet.java

@@ -0,0 +1,95 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+package net.helenus.core.cache;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import net.helenus.core.SchemaUtil;
+import net.helenus.mapping.HelenusProperty;
+
+public class UnboundFacet extends Facet<String> {
+
+  private final List<HelenusProperty> properties;
+  private final boolean alone;
+  private final boolean combined;
+
+  public UnboundFacet(List<HelenusProperty> properties, boolean alone, boolean combined) {
+    super(SchemaUtil.createPrimaryKeyPhrase(properties));
+    this.properties = properties;
+    this.alone = alone;
+    this.combined = combined;
+  }
+
+  public UnboundFacet(List<HelenusProperty> properties) {
+    this(properties, true, true);
+  }
+
+  public UnboundFacet(HelenusProperty property, boolean alone, boolean combined) {
+    super(property.getPropertyName());
+    properties = new ArrayList<HelenusProperty>();
+    properties.add(property);
+    this.alone = alone;
+    this.combined = combined;
+  }
+
+  public UnboundFacet(HelenusProperty property) {
+    this(property, true, true);
+  }
+
+  public List<HelenusProperty> getProperties() {
+    return properties;
+  }
+
+  public Binder binder() {
+    return new Binder(name(), properties, alone, combined);
+  }
+
+  public static class Binder {
+
+    private final String name;
+    private final boolean alone;
+    private final boolean combined;
+    private final List<HelenusProperty> properties = new ArrayList<HelenusProperty>();
+    private Map<HelenusProperty, Object> boundProperties = new HashMap<HelenusProperty, Object>();
+
+    Binder(String name, List<HelenusProperty> properties, boolean alone, boolean combined) {
+      this.name = name;
+      this.properties.addAll(properties);
+      this.alone = alone;
+      this.combined = combined;
+    }
+
+    public Binder setValueForProperty(HelenusProperty prop, Object value) {
+      properties.remove(prop);
+      boundProperties.put(prop, value);
+      return this;
+    }
+
+    public boolean isBound() {
+      return properties.isEmpty();
+    }
+
+    public BoundFacet bind() {
+      BoundFacet facet = new BoundFacet(name, boundProperties);
+      facet.setUniquelyIdentifyingWhenAlone(alone);
+      facet.setUniquelyIdentifyingWhenCombined(combined);
+      return facet;
+    }
+  }
+}

src/main/java/net/helenus/core/operation/AbstractFilterOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,14 +16,15 @@
  */
 package net.helenus.core.operation;
 
-import java.util.LinkedList;
-import java.util.List;
-
+import java.util.*;
 import net.helenus.core.*;
+import net.helenus.core.cache.Facet;
+import net.helenus.core.cache.UnboundFacet;
+import net.helenus.core.reflect.HelenusPropertyNode;
+import net.helenus.mapping.HelenusProperty;
 
 public abstract class AbstractFilterOperation<E, O extends AbstractFilterOperation<E, O>>
-		extends
-			AbstractOperation<E, O> {
+    extends AbstractOperation<E, O> {
 
   protected List<Filter<?>> filters = null;
   protected List<Filter<?>> ifFilters = null;
@@ -108,4 +110,59 @@ public abstract class AbstractFilterOperation<E, O extends AbstractFilterOperati
     ifFilters.add(filter);
   }
 
+  @Override
+  protected boolean isIdempotentOperation() {
+    if (filters == null) {
+      return super.isIdempotentOperation();
+    }
+
+    return filters
+            .stream()
+            .anyMatch(
+                filter -> {
+                  HelenusPropertyNode node = filter.getNode();
+                  if (node != null) {
+                    HelenusProperty prop = node.getProperty();
+                    if (prop != null) {
+                      return prop.isIdempotent();
+                    }
+                  }
+                  return false;
+                })
+        || super.isIdempotentOperation();
+  }
+
+  protected List<Facet> bindFacetValues(List<Facet> facets) {
+    if (facets == null) {
+      return new ArrayList<Facet>();
+    }
+    List<Facet> boundFacets = new ArrayList<>();
+    Map<HelenusProperty, Filter> filterMap = new HashMap<>(filters.size());
+    filters.forEach(f -> filterMap.put(f.getNode().getProperty(), f));
+
+    for (Facet facet : facets) {
+      if (facet instanceof UnboundFacet) {
+        UnboundFacet unboundFacet = (UnboundFacet) facet;
+        UnboundFacet.Binder binder = unboundFacet.binder();
+        if (filters != null) {
+          for (HelenusProperty prop : unboundFacet.getProperties()) {
+
+            Filter filter = filterMap.get(prop);
+            if (filter != null) {
+              Object[] postulates = filter.postulateValues();
+              for (Object p : postulates) {
+                binder.setValueForProperty(prop, p.toString());
+              }
+            }
+          }
+        }
+        if (binder.isBound()) {
+          boundFacets.add(binder.bind());
+        }
+      } else {
+        boundFacets.add(facet);
+      }
+    }
+    return boundFacets;
+  }
 }

src/main/java/net/helenus/core/operation/AbstractFilterOptionalOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,16 +16,18 @@
  */
 package net.helenus.core.operation;
 
+import java.util.LinkedHashMap;
 import java.util.LinkedList;
 import java.util.List;
-
+import java.util.Map;
 import net.helenus.core.*;
+import net.helenus.mapping.HelenusProperty;
 
-public abstract class AbstractFilterOptionalOperation<E, O extends AbstractFilterOptionalOperation<E, O>>
-		extends
-			AbstractOptionalOperation<E, O> {
+public abstract class AbstractFilterOptionalOperation<
+        E, O extends AbstractFilterOptionalOperation<E, O>>
+    extends AbstractOptionalOperation<E, O> {
 
-	protected List<Filter<?>> filters = null;
+  protected Map<HelenusProperty, Filter<?>> filters = null;
   protected List<Filter<?>> ifFilters = null;
 
   public AbstractFilterOptionalOperation(AbstractSessionOperations sessionOperations) {
@@ -96,9 +99,9 @@ public abstract class AbstractFilterOptionalOperation<E, O extends AbstractFilte
 
   private void addFilter(Filter<?> filter) {
     if (filters == null) {
-			filters = new LinkedList<Filter<?>>();
+      filters = new LinkedHashMap<HelenusProperty, Filter<?>>();
     }
-		filters.add(filter);
+    filters.put(filter.getNode().getProperty(), filter);
   }
 
   private void addIfFilter(Filter<?> filter) {
@@ -107,5 +110,4 @@ public abstract class AbstractFilterOptionalOperation<E, O extends AbstractFilte
     }
     ifFilters.add(filter);
   }
-
 }

src/main/java/net/helenus/core/operation/AbstractFilterStreamOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,15 +16,18 @@
  */
 package net.helenus.core.operation;
 
+import java.util.LinkedHashMap;
 import java.util.LinkedList;
 import java.util.List;
-
+import java.util.Map;
 import net.helenus.core.*;
+import net.helenus.mapping.HelenusProperty;
 
-public abstract class AbstractFilterStreamOperation<E, O extends AbstractFilterStreamOperation<E, O>>
+public abstract class AbstractFilterStreamOperation<
+        E, O extends AbstractFilterStreamOperation<E, O>>
     extends AbstractStreamOperation<E, O> {
 
-	protected List<Filter<?>> filters = null;
+  protected Map<HelenusProperty, Filter<?>> filters = null;
   protected List<Filter<?>> ifFilters = null;
 
   public AbstractFilterStreamOperation(AbstractSessionOperations sessionOperations) {
@@ -39,7 +43,7 @@ public abstract class AbstractFilterStreamOperation<E, O extends AbstractFilterS
 
   public <V> O where(Getter<V> getter, Operator operator, V val) {
 
-		addFilter(Filter.create(getter, operator, val));
+    if (val != null) addFilter(Filter.create(getter, operator, val));
 
     return (O) this;
   }
@@ -60,7 +64,7 @@ public abstract class AbstractFilterStreamOperation<E, O extends AbstractFilterS
 
   public <V> O and(Getter<V> getter, Operator operator, V val) {
 
-		addFilter(Filter.create(getter, operator, val));
+    if (val != null) addFilter(Filter.create(getter, operator, val));
 
     return (O) this;
   }
@@ -81,7 +85,7 @@ public abstract class AbstractFilterStreamOperation<E, O extends AbstractFilterS
 
   public <V> O onlyIf(Getter<V> getter, Operator operator, V val) {
 
-		addIfFilter(Filter.create(getter, operator, val));
+    if (val != null) addIfFilter(Filter.create(getter, operator, val));
 
     return (O) this;
   }
@@ -95,9 +99,9 @@ public abstract class AbstractFilterStreamOperation<E, O extends AbstractFilterS
 
   private void addFilter(Filter<?> filter) {
     if (filters == null) {
-			filters = new LinkedList<Filter<?>>();
+      filters = new LinkedHashMap<HelenusProperty, Filter<?>>();
     }
-		filters.add(filter);
+    filters.put(filter.getNode().getProperty(), filter);
   }
 
   private void addIfFilter(Filter<?> filter) {
@@ -106,5 +110,4 @@ public abstract class AbstractFilterStreamOperation<E, O extends AbstractFilterS
     }
     ifFilters.add(filter);
   }
-
 }

src/main/java/net/helenus/core/operation/AbstractOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,106 +16,76 @@
  */
 package net.helenus.core.operation;
 
-import com.datastax.driver.core.PreparedStatement;
+import com.codahale.metrics.Timer;
 import com.datastax.driver.core.ResultSet;
-import com.datastax.driver.core.ResultSetFuture;
-import com.google.common.base.Function;
-import com.google.common.util.concurrent.Futures;
-import com.google.common.util.concurrent.ListenableFuture;
-
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.TimeoutException;
 import net.helenus.core.AbstractSessionOperations;
-import net.helenus.support.Fun;
-import net.helenus.support.Scala;
-import scala.concurrent.Future;
+import net.helenus.core.UnitOfWork;
 
-public abstract class AbstractOperation<E, O extends AbstractOperation<E, O>> extends AbstractStatementOperation<E, O> {
-
-	public abstract E transform(ResultSet resultSet);
-
-	public boolean cacheable() {
-		return false;
-	}
-
-	public String getCacheKey() {
-		return "";
-	}
+public abstract class AbstractOperation<E, O extends AbstractOperation<E, O>>
+    extends AbstractStatementOperation<E, O> {
 
   public AbstractOperation(AbstractSessionOperations sessionOperations) {
     super(sessionOperations);
   }
 
+  public abstract E transform(ResultSet resultSet);
+
   public PreparedOperation<E> prepare() {
     return new PreparedOperation<E>(prepareStatement(), this);
   }
 
-	public ListenableFuture<PreparedOperation<E>> prepareAsync() {
-
-		final O _this = (O) this;
-
-		return Futures.transform(prepareStatementAsync(), new Function<PreparedStatement, PreparedOperation<E>>() {
-
-			@Override
-			public PreparedOperation<E> apply(PreparedStatement preparedStatement) {
-				return new PreparedOperation<E>(preparedStatement, _this);
-			}
-
-		});
-
-	}
-
-	public Future<PreparedOperation<E>> prepareFuture() {
-		return Scala.asFuture(prepareAsync());
-	}
-
-	public E sync() {
-
-		ResultSet resultSet = sessionOps.executeAsync(options(buildStatement()), showValues).getUninterruptibly();
-		E result = transform(resultSet);
-		if (cacheable()) {
-			sessionOps.cache(getCacheKey(), result);
-		}
-		return result;
-
-	}
-
-	public ListenableFuture<E> async() {
-
-		ResultSetFuture resultSetFuture = sessionOps.executeAsync(options(buildStatement()), showValues);
-
-		ListenableFuture<E> future = Futures.transform(resultSetFuture, new Function<ResultSet, E>() {
-
-			@Override
-			public E apply(ResultSet resultSet) {
-				E result = transform(resultSet);
-				if (cacheable()) {
-					sessionOps.cache(getCacheKey(), result);
-				}
+  public E sync() throws TimeoutException {
+    final Timer.Context context = requestLatency.time();
+    try {
+      ResultSet resultSet =
+          this.execute(
+              sessionOps, null, queryExecutionTimeout, queryTimeoutUnits, showValues, false);
       return transform(resultSet);
+    } finally {
+      context.stop();
+    }
   }
 
-		}, sessionOps.getExecutor());
+  public E sync(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) return sync();
 
-		return future;
+    final Timer.Context context = requestLatency.time();
+    try {
+      ResultSet resultSet =
+          execute(sessionOps, uow, queryExecutionTimeout, queryTimeoutUnits, showValues, true);
+      E result = transform(resultSet);
+      return result;
+    } finally {
+      context.stop();
+    }
   }
 
-	public Future<E> future() {
-		return Scala.asFuture(async());
+  public CompletableFuture<E> async() {
+    return CompletableFuture.<E>supplyAsync(
+        () -> {
+          try {
+            return sync();
+          } catch (TimeoutException ex) {
+            throw new CompletionException(ex);
+          }
+        });
   }
 
-	public <A> Future<Fun.Tuple2<E, A>> future(A a) {
-		return Scala.asFuture(async(), a);
+  public CompletableFuture<E> async(UnitOfWork uow) {
+    if (uow == null) return async();
+    CompletableFuture<E> f =
+        CompletableFuture.<E>supplyAsync(
+            () -> {
+              try {
+                return sync();
+              } catch (TimeoutException ex) {
+                throw new CompletionException(ex);
               }
-
-	public <A, B> Future<Fun.Tuple3<E, A, B>> future(A a, B b) {
-		return Scala.asFuture(async(), a, b);
+            });
+    uow.addFuture(f);
+    return f;
   }
-
-	public <A, B, C> Future<Fun.Tuple4<E, A, B, C>> future(A a, B b, C c) {
-		return Scala.asFuture(async(), a, b, c);
-	}
-
-	public <A, B, C, D> Future<Fun.Tuple5<E, A, B, C, D>> future(A a, B b, C c, D d) {
-		return Scala.asFuture(async(), a, b, c, d);
-	}
-
 }

src/main/java/net/helenus/core/operation/AbstractOptionalOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,25 +16,32 @@
  */
 package net.helenus.core.operation;
 
-import java.util.Optional;
+import static net.helenus.core.HelenusSession.deleted;
 
+import com.codahale.metrics.Timer;
 import com.datastax.driver.core.PreparedStatement;
 import com.datastax.driver.core.ResultSet;
-import com.datastax.driver.core.ResultSetFuture;
 import com.google.common.base.Function;
+import com.google.common.base.Stopwatch;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
-
+import java.io.Serializable;
+import java.util.List;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.TimeoutException;
 import net.helenus.core.AbstractSessionOperations;
+import net.helenus.core.Helenus;
+import net.helenus.core.UnitOfWork;
+import net.helenus.core.cache.CacheUtil;
+import net.helenus.core.cache.Facet;
+import net.helenus.mapping.MappingUtil;
 import net.helenus.support.Fun;
-import net.helenus.support.Scala;
-import scala.Option;
-import scala.Some;
-import scala.concurrent.Future;
+import org.apache.commons.lang3.SerializationUtils;
 
 public abstract class AbstractOptionalOperation<E, O extends AbstractOptionalOperation<E, O>>
-		extends
-			AbstractStatementOperation<E, O> {
+    extends AbstractStatementOperation<E, O> {
 
   public AbstractOptionalOperation(AbstractSessionOperations sessionOperations) {
     super(sessionOperations);
@@ -46,87 +54,202 @@ public abstract class AbstractOptionalOperation<E, O extends AbstractOptionalOpe
   }
 
   public ListenableFuture<PreparedOptionalOperation<E>> prepareAsync() {
-
     final O _this = (O) this;
-
-		return Futures.transform(prepareStatementAsync(),
+    return Futures.transform(
+        prepareStatementAsync(),
         new Function<PreparedStatement, PreparedOptionalOperation<E>>() {
-
           @Override
           public PreparedOptionalOperation<E> apply(PreparedStatement preparedStatement) {
             return new PreparedOptionalOperation<E>(preparedStatement, _this);
           }
-
         });
-
   }
 
-	public Future<PreparedOptionalOperation<E>> prepareFuture() {
-		return Scala.asFuture(prepareAsync());
-	}
+  public Optional<E> sync() throws TimeoutException {
+    final Timer.Context context = requestLatency.time();
+    try {
+      Optional<E> result = Optional.empty();
+      E cacheResult = null;
+      boolean updateCache = isSessionCacheable() && !ignoreCache();
 
-	public Optional<E> sync() {
-
-		ResultSet resultSet = sessionOps.executeAsync(options(buildStatement()), showValues).getUninterruptibly();
-
-		return transform(resultSet);
-	}
-
-	public ListenableFuture<Optional<E>> async() {
-
-		ResultSetFuture resultSetFuture = sessionOps.executeAsync(options(buildStatement()), showValues);
-
-		ListenableFuture<Optional<E>> future = Futures.transform(resultSetFuture,
-				new Function<ResultSet, Optional<E>>() {
-
-					@Override
-					public Optional<E> apply(ResultSet resultSet) {
-						return transform(resultSet);
-					}
-
-				}, sessionOps.getExecutor());
-
-		return future;
-	}
-
-	public ListenableFuture<Option<E>> asyncForScala() {
-
-		ResultSetFuture resultSetFuture = sessionOps.executeAsync(options(buildStatement()), showValues);
-
-		ListenableFuture<Option<E>> future = Futures.transform(resultSetFuture, new Function<ResultSet, Option<E>>() {
-
-			@Override
-			public Option<E> apply(ResultSet resultSet) {
-				Optional<E> optional = transform(resultSet);
-				if (optional.isPresent()) {
-					return new Some<E>(optional.get());
+      if (updateCache) {
+        List<Facet> facets = bindFacetValues();
+        if (facets != null && facets.size() > 0) {
+          if (facets.stream().filter(f -> !f.fixed()).distinct().count() > 0) {
+            String tableName = CacheUtil.schemaName(facets);
+            cacheResult = (E) sessionOps.checkCache(tableName, facets);
+            if (cacheResult != null) {
+              result = Optional.of(cacheResult);
+              updateCache = false;
+              sessionCacheHits.mark();
+              cacheHits.mark();
             } else {
-					return Option.empty();
+              sessionCacheMiss.mark();
+              cacheMiss.mark();
+            }
+          }
+        } else {
+          //TODO(gburd): look in statement cache for results
         }
       }
 
-		}, sessionOps.getExecutor());
+      if (!result.isPresent()) {
+        // Formulate the query and execute it against the Cassandra cluster.
+        ResultSet resultSet =
+            this.execute(
+                sessionOps,
+                null,
+                queryExecutionTimeout,
+                queryTimeoutUnits,
+                showValues,
+                isSessionCacheable());
 
-		return future;
-	}
-	public Future<Option<E>> future() {
-		return Scala.asFuture(asyncForScala());
+        // Transform the query result set into the desired shape.
+        result = transform(resultSet);
       }
 
-	public <A> Future<Fun.Tuple2<Option<E>, A>> future(A a) {
-		return Scala.asFuture(asyncForScala(), a);
+      if (updateCache && result.isPresent()) {
+        E r = result.get();
+        Class<?> resultClass = r.getClass();
+        if (!(resultClass.getEnclosingClass() != null
+            && resultClass.getEnclosingClass() == Fun.class)) {
+          List<Facet> facets = getFacets();
+          if (facets != null && facets.size() > 1) {
+            sessionOps.updateCache(r, facets);
+          }
+        }
+      }
+      return result;
+    } finally {
+      context.stop();
+    }
   }
 
-	public <A, B> Future<Fun.Tuple3<Option<E>, A, B>> future(A a, B b) {
-		return Scala.asFuture(asyncForScala(), a, b);
+  public Optional<E> sync(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) return sync();
+
+    final Timer.Context context = requestLatency.time();
+    try {
+
+      Optional<E> result = Optional.empty();
+      E cachedResult = null;
+      final boolean updateCache;
+
+      if (!ignoreCache()) {
+        Stopwatch timer = Stopwatch.createStarted();
+        try {
+          List<Facet> facets = bindFacetValues();
+          if (facets != null && facets.size() > 0) {
+            if (facets.stream().filter(f -> !f.fixed()).distinct().count() > 0) {
+              cachedResult = checkCache(uow, facets);
+              if (cachedResult != null) {
+                updateCache = false;
+                result = Optional.of(cachedResult);
+                uowCacheHits.mark();
+                cacheHits.mark();
+                uow.recordCacheAndDatabaseOperationCount(1, 0);
+              } else {
+                uowCacheMiss.mark();
+                if (isSessionCacheable()) {
+                  String tableName = CacheUtil.schemaName(facets);
+                  cachedResult = (E) sessionOps.checkCache(tableName, facets);
+                  if (cachedResult != null) {
+                    Class<?> iface = MappingUtil.getMappingInterface(cachedResult);
+                    if (Helenus.entity(iface).isDraftable()) {
+                      result = Optional.of(cachedResult);
+                    } else {
+                      result =
+                          Optional.of(
+                              (E)
+                                  SerializationUtils.<Serializable>clone(
+                                      (Serializable) cachedResult));
+                    }
+                    updateCache = false;
+                    sessionCacheHits.mark();
+                    cacheHits.mark();
+                    uow.recordCacheAndDatabaseOperationCount(1, 0);
+                  } else {
+                    updateCache = true;
+                    sessionCacheMiss.mark();
+                    cacheMiss.mark();
+                    uow.recordCacheAndDatabaseOperationCount(-1, 0);
+                  }
+                } else {
+                  updateCache = false;
+                }
+              }
+            } else {
+              //TODO(gburd): look in statement cache for results
+              updateCache = false; //true;
+              cacheMiss.mark();
+              uow.recordCacheAndDatabaseOperationCount(-1, 0);
+            }
+          } else {
+            updateCache = false;
+          }
+        } finally {
+          timer.stop();
+          uow.addCacheLookupTime(timer);
+        }
+      } else {
+        updateCache = false;
       }
 
-	public <A, B, C> Future<Fun.Tuple4<Option<E>, A, B, C>> future(A a, B b, C c) {
-		return Scala.asFuture(asyncForScala(), a, b, c);
+      // Check to see if we fetched the object from the cache
+      if (result.isPresent()) {
+        // If we fetched the `deleted` object then the result is null (really
+        // Optional.empty()).
+        if (result.get() == deleted) {
+          result = Optional.empty();
+        }
+      } else {
+
+        // Formulate the query and execute it against the Cassandra cluster.
+        ResultSet resultSet =
+            execute(sessionOps, uow, queryExecutionTimeout, queryTimeoutUnits, showValues, true);
+
+        // Transform the query result set into the desired shape.
+        result = transform(resultSet);
       }
 
-	public <A, B, C, D> Future<Fun.Tuple5<Option<E>, A, B, C, D>> future(A a, B b, C c, D d) {
-		return Scala.asFuture(asyncForScala(), a, b, c, d);
+      // If we have a result, it wasn't from the UOW cache, and we're caching things
+      // then we need to put this result into the cache for future requests to find.
+      if (updateCache && result.isPresent()) {
+        E r = result.get();
+        if (!(r instanceof Fun) && r != deleted) {
+          cacheUpdate(uow, r, getFacets());
+        }
       }
 
+      return result;
+    } finally {
+      context.stop();
+    }
+  }
+
+  public CompletableFuture<Optional<E>> async() {
+    return CompletableFuture.<Optional<E>>supplyAsync(
+        () -> {
+          try {
+            return sync();
+          } catch (TimeoutException ex) {
+            throw new CompletionException(ex);
+          }
+        });
+  }
+
+  public CompletableFuture<Optional<E>> async(UnitOfWork uow) {
+    if (uow == null) return async();
+    CompletableFuture<Optional<E>> f =
+        CompletableFuture.<Optional<E>>supplyAsync(
+            () -> {
+              try {
+                return sync();
+              } catch (TimeoutException ex) {
+                throw new CompletionException(ex);
+              }
+            });
+    uow.addFuture(f);
+    return f;
+  }
 }

src/main/java/net/helenus/core/operation/AbstractStatementOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,9 +16,6 @@
  */
 package net.helenus.core.operation;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import com.datastax.driver.core.ConsistencyLevel;
 import com.datastax.driver.core.PreparedStatement;
 import com.datastax.driver.core.RegularStatement;
@@ -28,30 +26,47 @@ import com.datastax.driver.core.policies.FallthroughRetryPolicy;
 import com.datastax.driver.core.policies.RetryPolicy;
 import com.datastax.driver.core.querybuilder.BuiltStatement;
 import com.google.common.util.concurrent.ListenableFuture;
-
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.TimeUnit;
 import net.helenus.core.AbstractSessionOperations;
+import net.helenus.core.UnitOfWork;
+import net.helenus.core.cache.Facet;
+import net.helenus.core.cache.UnboundFacet;
+import net.helenus.core.reflect.MapExportable;
+import net.helenus.mapping.HelenusProperty;
+import net.helenus.mapping.value.BeanColumnValueProvider;
 import net.helenus.support.HelenusException;
-import net.helenus.support.Scala;
-import scala.concurrent.Future;
 
-public abstract class AbstractStatementOperation<E, O extends AbstractStatementOperation<E, O>> {
-
-	final Logger logger = LoggerFactory.getLogger(getClass());
-
-	protected final AbstractSessionOperations sessionOps;
-
-	public abstract Statement buildStatement();
-
-	protected boolean showValues = true;
+public abstract class AbstractStatementOperation<E, O extends AbstractStatementOperation<E, O>>
+    extends Operation<E> {
+  private boolean ignoreCache = false;
   private ConsistencyLevel consistencyLevel;
   private ConsistencyLevel serialConsistencyLevel;
   private RetryPolicy retryPolicy;
   private boolean enableTracing = false;
   private long[] defaultTimestamp = null;
   private int[] fetchSize = null;
+  protected boolean idempotent = false;
 
   public AbstractStatementOperation(AbstractSessionOperations sessionOperations) {
-		this.sessionOps = sessionOperations;
+    super(sessionOperations);
+    this.consistencyLevel = sessionOperations.getDefaultConsistencyLevel();
+    this.idempotent = sessionOperations.getDefaultQueryIdempotency();
+  }
+
+  public abstract Statement buildStatement(boolean cached);
+
+  public O uncached(boolean enabled) {
+    ignoreCache = !enabled;
+    return (O) this;
+  }
+
+  public O uncached() {
+    ignoreCache = true;
+    return (O) this;
   }
 
   public O showValues(boolean enabled) {
@@ -75,6 +90,16 @@ public abstract class AbstractStatementOperation<E, O extends AbstractStatementO
     return (O) this;
   }
 
+  public O idempotent() {
+    this.idempotent = true;
+    return (O) this;
+  }
+
+  public O isIdempotent(boolean idempotent) {
+    this.idempotent = idempotent;
+    return (O) this;
+  }
+
   public O downgradingConsistencyRetryPolicy() {
     this.retryPolicy = DowngradingConsistencyRetryPolicy.INSTANCE;
     return (O) this;
@@ -110,6 +135,21 @@ public abstract class AbstractStatementOperation<E, O extends AbstractStatementO
     return (O) this;
   }
 
+  public O consistencyLocalOne() {
+    this.consistencyLevel = ConsistencyLevel.LOCAL_ONE;
+    return (O) this;
+  }
+
+  public O consistencyLocalQuorum() {
+    this.consistencyLevel = ConsistencyLevel.LOCAL_QUORUM;
+    return (O) this;
+  }
+
+  public O consistencyEachQuorum() {
+    this.consistencyLevel = ConsistencyLevel.EACH_QUORUM;
+    return (O) this;
+  }
+
   public O serialConsistency(ConsistencyLevel level) {
     this.serialConsistencyLevel = level;
     return (O) this;
@@ -135,6 +175,16 @@ public abstract class AbstractStatementOperation<E, O extends AbstractStatementO
     return (O) this;
   }
 
+  public O serialConsistencyLocal() {
+    this.serialConsistencyLevel = ConsistencyLevel.LOCAL_SERIAL;
+    return (O) this;
+  }
+
+  public O serialConsistencyLocalQuorum() {
+    this.serialConsistencyLevel = ConsistencyLevel.LOCAL_QUORUM;
+    return (O) this;
+  }
+
   public O disableTracing() {
     this.enableTracing = false;
     return (O) this;
@@ -156,7 +206,19 @@ public abstract class AbstractStatementOperation<E, O extends AbstractStatementO
     return (O) this;
   }
 
-	protected Statement options(Statement statement) {
+  public O queryTimeoutMs(long ms) {
+    this.queryExecutionTimeout = ms;
+    this.queryTimeoutUnits = TimeUnit.MILLISECONDS;
+    return (O) this;
+  }
+
+  public O queryTimeout(long timeout, TimeUnit units) {
+    this.queryExecutionTimeout = timeout;
+    this.queryTimeoutUnits = units;
+    return (O) this;
+  }
+
+  public Statement options(Statement statement) {
 
     if (defaultTimestamp != null) {
       statement.setDefaultTimestamp(defaultTimestamp[0]);
@@ -184,15 +246,24 @@ public abstract class AbstractStatementOperation<E, O extends AbstractStatementO
       statement.setFetchSize(fetchSize[0]);
     }
 
+    if (isIdempotentOperation()) {
+      statement.setIdempotent(true);
+    }
+
     return statement;
   }
 
+  @Override
+  protected boolean isIdempotentOperation() {
+    return idempotent;
+  }
+
   public Statement statement() {
-		return buildStatement();
+    return buildStatement(false);
   }
 
   public String cql() {
-		Statement statement = buildStatement();
+    Statement statement = buildStatement(false);
     if (statement == null) return "";
     if (statement instanceof BuiltStatement) {
       BuiltStatement buildStatement = (BuiltStatement) statement;
@@ -204,7 +275,7 @@ public abstract class AbstractStatementOperation<E, O extends AbstractStatementO
 
   public PreparedStatement prepareStatement() {
 
-		Statement statement = buildStatement();
+    Statement statement = buildStatement(true);
 
     if (statement instanceof RegularStatement) {
 
@@ -218,21 +289,68 @@ public abstract class AbstractStatementOperation<E, O extends AbstractStatementO
 
   public ListenableFuture<PreparedStatement> prepareStatementAsync() {
 
-		Statement statement = buildStatement();
+    Statement statement = buildStatement(true);
 
     if (statement instanceof RegularStatement) {
 
       RegularStatement regularStatement = (RegularStatement) statement;
 
       return sessionOps.prepareAsync(regularStatement);
-
     }
 
     throw new HelenusException("only RegularStatements can be prepared");
   }
 
-	public Future<PreparedStatement> prepareStatementFuture() {
-		return Scala.asFuture(prepareStatementAsync());
+  protected boolean ignoreCache() {
+    return ignoreCache;
   }
 
+  protected E checkCache(UnitOfWork uow, List<Facet> facets) {
+    E result = null;
+    Optional<Object> optionalCachedResult = Optional.empty();
+
+    if (!facets.isEmpty()) {
+      optionalCachedResult = uow.cacheLookup(facets);
+      if (optionalCachedResult.isPresent()) {
+        result = (E) optionalCachedResult.get();
+      }
+    }
+
+    return result;
+  }
+
+  protected Object cacheUpdate(UnitOfWork uow, E pojo, List<Facet> identifyingFacets) {
+    List<Facet> facets = new ArrayList<>();
+    Map<String, Object> valueMap =
+        pojo instanceof MapExportable ? ((MapExportable) pojo).toMap() : null;
+
+    for (Facet facet : identifyingFacets) {
+      if (facet instanceof UnboundFacet) {
+        UnboundFacet unboundFacet = (UnboundFacet) facet;
+        UnboundFacet.Binder binder = unboundFacet.binder();
+        for (HelenusProperty prop : unboundFacet.getProperties()) {
+          Object value;
+          if (valueMap == null) {
+            value = BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+            if (value != null) {
+              binder.setValueForProperty(prop, value.toString());
+            }
+          } else {
+            value = valueMap.get(prop.getPropertyName());
+            if (value != null) {
+              binder.setValueForProperty(prop, value.toString());
+            }
+          }
+        }
+        if (binder.isBound()) {
+          facets.add(binder.bind());
+        }
+      } else {
+        facets.add(facet);
+      }
+    }
+
+    // Cache the value (pojo), the statement key, and the fully bound facets.
+    return uow.cacheUpdate(pojo, facets);
+  }
 }

src/main/java/net/helenus/core/operation/AbstractStreamOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,24 +16,33 @@
  */
 package net.helenus.core.operation;
 
-import java.util.stream.Stream;
+import static net.helenus.core.HelenusSession.deleted;
 
+import com.codahale.metrics.Timer;
 import com.datastax.driver.core.PreparedStatement;
 import com.datastax.driver.core.ResultSet;
-import com.datastax.driver.core.ResultSetFuture;
 import com.google.common.base.Function;
-import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.base.Stopwatch;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
-
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.TimeoutException;
+import java.util.stream.Stream;
 import net.helenus.core.AbstractSessionOperations;
+import net.helenus.core.Helenus;
+import net.helenus.core.UnitOfWork;
+import net.helenus.core.cache.CacheUtil;
+import net.helenus.core.cache.Facet;
+import net.helenus.mapping.MappingUtil;
 import net.helenus.support.Fun;
-import net.helenus.support.Scala;
-import scala.concurrent.Future;
+import org.apache.commons.lang3.SerializationUtils;
 
 public abstract class AbstractStreamOperation<E, O extends AbstractStreamOperation<E, O>>
-		extends
-			AbstractStatementOperation<E, O> {
+    extends AbstractStatementOperation<E, O> {
 
   public AbstractStreamOperation(AbstractSessionOperations sessionOperations) {
     super(sessionOperations);
@@ -45,93 +55,207 @@ public abstract class AbstractStreamOperation<E, O extends AbstractStreamOperati
   }
 
   public ListenableFuture<PreparedStreamOperation<E>> prepareAsync() {
-
     final O _this = (O) this;
-
-		return Futures.transform(prepareStatementAsync(),
+    return Futures.transform(
+        prepareStatementAsync(),
         new Function<PreparedStatement, PreparedStreamOperation<E>>() {
-
           @Override
           public PreparedStreamOperation<E> apply(PreparedStatement preparedStatement) {
             return new PreparedStreamOperation<E>(preparedStatement, _this);
           }
-
         });
-
   }
 
-	public Future<PreparedStreamOperation<E>> prepareFuture() {
-		return Scala.asFuture(prepareAsync());
+  public Stream<E> sync() throws TimeoutException {
+    final Timer.Context context = requestLatency.time();
+    try {
+      Stream<E> resultStream = null;
+      E cacheResult = null;
+      boolean updateCache = isSessionCacheable();
+
+      if (!ignoreCache() && isSessionCacheable()) {
+        List<Facet> facets = bindFacetValues();
+        if (facets != null && facets.size() > 0) {
+          if (facets.stream().filter(f -> !f.fixed()).distinct().count() > 0) {
+            String tableName = CacheUtil.schemaName(facets);
+            cacheResult = (E) sessionOps.checkCache(tableName, facets);
+            if (cacheResult != null) {
+              resultStream = Stream.of(cacheResult);
+              updateCache = false;
+              sessionCacheHits.mark();
+              cacheHits.mark();
+            } else {
+              sessionCacheMiss.mark();
+              cacheMiss.mark();
+            }
+          } else {
+            //TODO(gburd): look in statement cache for results
+          }
+        }
       }
 
-	public Stream<E> sync() {
-	    ListenableFuture<Stream<E>> future = async();
-        Futures.addCallback(future, new FutureCallback<String>() {
-            @Override
-            public void onSuccess(String contents) {
-                //...process web site contents
+      if (resultStream == null) {
+        // Formulate the query and execute it against the Cassandra cluster.
+        ResultSet resultSet =
+            this.execute(
+                sessionOps,
+                null,
+                queryExecutionTimeout,
+                queryTimeoutUnits,
+                showValues,
+                isSessionCacheable());
+
+        // Transform the query result set into the desired shape.
+        resultStream = transform(resultSet);
       }
 
-            @Override
-            public void onFailure(Throwable throwable) {
-                log.error("Exception in task", throwable);
+      if (updateCache && resultStream != null) {
+        List<Facet> facets = getFacets();
+        if (facets != null && facets.size() > 1) {
+          List<E> again = new ArrayList<>();
+          resultStream.forEach(
+              result -> {
+                Class<?> resultClass = result.getClass();
+                if (!(resultClass.getEnclosingClass() != null
+                    && resultClass.getEnclosingClass() == Fun.class)) {
+                  sessionOps.updateCache(result, facets);
+                }
+                again.add(result);
+              });
+          resultStream = again.stream();
+        }
+      }
+      return resultStream;
+
+    } finally {
+      context.stop();
+    }
+  }
+
+  public Stream<E> sync(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) return sync();
+
+    final Timer.Context context = requestLatency.time();
+    try {
+      Stream<E> resultStream = null;
+      E cachedResult = null;
+      final boolean updateCache;
+
+      if (!ignoreCache()) {
+        Stopwatch timer = Stopwatch.createStarted();
+        try {
+          List<Facet> facets = bindFacetValues();
+          if (facets != null && facets.size() > 0) {
+            if (facets.stream().filter(f -> !f.fixed()).distinct().count() > 0) {
+              cachedResult = checkCache(uow, facets);
+              if (cachedResult != null) {
+                updateCache = false;
+                resultStream = Stream.of(cachedResult);
+                uowCacheHits.mark();
+                cacheHits.mark();
+                uow.recordCacheAndDatabaseOperationCount(1, 0);
+              } else {
+                uowCacheMiss.mark();
+                if (isSessionCacheable()) {
+                  String tableName = CacheUtil.schemaName(facets);
+                  cachedResult = (E) sessionOps.checkCache(tableName, facets);
+                  if (cachedResult != null) {
+                    Class<?> iface = MappingUtil.getMappingInterface(cachedResult);
+                    E result = null;
+                    if (Helenus.entity(iface).isDraftable()) {
+                      result = cachedResult;
+                    } else {
+                      result =
+                          (E) SerializationUtils.<Serializable>clone((Serializable) cachedResult);
+                    }
+                    updateCache = false;
+                    resultStream = Stream.of(result);
+                    sessionCacheHits.mark();
+                    cacheHits.mark();
+                    uow.recordCacheAndDatabaseOperationCount(1, 0);
+                  } else {
+                    updateCache = true;
+                    sessionCacheMiss.mark();
+                    cacheMiss.mark();
+                    uow.recordCacheAndDatabaseOperationCount(-1, 0);
+                  }
+                } else {
+                  updateCache = false;
+                }
+              }
+            } else {
+              //TODO(gburd): look in statement cache for results
+              updateCache = false; //true;
+              cacheMiss.mark();
+              uow.recordCacheAndDatabaseOperationCount(-1, 0);
+            }
+          } else {
+            updateCache = false;
+          }
+        } finally {
+          timer.stop();
+          uow.addCacheLookupTime(timer);
+        }
+      } else {
+        updateCache = false;
+      }
+
+      // Check to see if we fetched the object from the cache
+      if (resultStream == null) {
+        ResultSet resultSet =
+            execute(sessionOps, uow, queryExecutionTimeout, queryTimeoutUnits, showValues, true);
+        resultStream = transform(resultSet);
+      }
+
+      // If we have a result and we're caching then we need to put it into the cache
+      // for future requests to find.
+      if (resultStream != null) {
+        if (updateCache) {
+          List<E> again = new ArrayList<>();
+          List<Facet> facets = getFacets();
+          resultStream.forEach(
+              result -> {
+                Class<?> resultClass = result.getClass();
+                if (result != deleted
+                    && !(resultClass.getEnclosingClass() != null
+                        && resultClass.getEnclosingClass() == Fun.class)) {
+                  result = (E) cacheUpdate(uow, result, facets);
+                }
+                again.add(result);
+              });
+          resultStream = again.stream();
+        }
+      }
+
+      return resultStream;
+    } finally {
+      context.stop();
+    }
+  }
+
+  public CompletableFuture<Stream<E>> async() {
+    return CompletableFuture.<Stream<E>>supplyAsync(
+        () -> {
+          try {
+            return sync();
+          } catch (TimeoutException ex) {
+            throw new CompletionException(ex);
           }
         });
   }
 
-	public ListenableFuture<Stream<E>> async() {
-
-		ResultSetFuture resultSetFuture = sessionOps.executeAsync(options(buildStatement()), showValues);
-
-		ListenableFuture<Stream<E>> future = Futures.transform(resultSetFuture, new Function<ResultSet, Stream<E>>() {
-
-			@Override
-			public Stream<E> apply(ResultSet resultSet) {
-				return transform(resultSet);
+  public CompletableFuture<Stream<E>> async(UnitOfWork uow) {
+    if (uow == null) return async();
+    CompletableFuture<Stream<E>> f =
+        CompletableFuture.<Stream<E>>supplyAsync(
+            () -> {
+              try {
+                return sync();
+              } catch (TimeoutException ex) {
+                throw new CompletionException(ex);
               }
-
-		}, sessionOps.getExecutor());
-
-		return future;
+            });
+    uow.addFuture(f);
+    return f;
   }
-
-	public ListenableFuture<scala.collection.immutable.Stream<E>> asyncForScala() {
-
-		ResultSetFuture resultSetFuture = sessionOps.executeAsync(options(buildStatement()), showValues);
-
-		ListenableFuture<scala.collection.immutable.Stream<E>> future = Futures.transform(resultSetFuture,
-				new Function<ResultSet, scala.collection.immutable.Stream<E>>() {
-
-					@Override
-					public scala.collection.immutable.Stream<E> apply(ResultSet resultSet) {
-						Stream<E> stream = transform(resultSet);
-						return scala.collection.JavaConversions.asScalaIterator(stream.iterator()).toStream();
-					}
-
-				}, sessionOps.getExecutor());
-
-		return future;
-	}
-
-	public Future<scala.collection.immutable.Stream<E>> future() {
-		return Scala.asFuture(asyncForScala());
-	}
-
-	public <A> Future<Fun.Tuple2<scala.collection.immutable.Stream<E>, A>> future(A a) {
-		return Scala.asFuture(asyncForScala(), a);
-	}
-
-	public <A, B> Future<Fun.Tuple3<scala.collection.immutable.Stream<E>, A, B>> future(A a, B b) {
-		return Scala.asFuture(asyncForScala(), a, b);
-	}
-
-	public <A, B, C> Future<Fun.Tuple4<scala.collection.immutable.Stream<E>, A, B, C>> future(A a, B b, C c) {
-		return Scala.asFuture(asyncForScala(), a, b, c);
-	}
-
-	public <A, B, C, D> Future<Fun.Tuple5<scala.collection.immutable.Stream<E>, A, B, C, D>> future(A a, B b, C c,
-			D d) {
-		return Scala.asFuture(asyncForScala(), a, b, c, d);
-	}
-
 }

src/main/java/net/helenus/core/operation/BatchOperation.java

@@ -0,0 +1,140 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+package net.helenus.core.operation;
+
+import com.codahale.metrics.Timer;
+import com.datastax.driver.core.AtomicMonotonicTimestampGenerator;
+import com.datastax.driver.core.BatchStatement;
+import com.datastax.driver.core.ResultSet;
+import com.datastax.driver.core.TimestampGenerator;
+import com.google.common.base.Stopwatch;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeoutException;
+import java.util.stream.Collectors;
+import net.helenus.core.AbstractSessionOperations;
+import net.helenus.core.UnitOfWork;
+import net.helenus.support.HelenusException;
+
+public class BatchOperation extends Operation<Long> {
+  //TODO(gburd): find the way to get the driver's timestamp generator
+  private static final TimestampGenerator timestampGenerator =
+      new AtomicMonotonicTimestampGenerator();
+
+  private final BatchStatement batch;
+  private List<AbstractOperation<?, ?>> operations = new ArrayList<AbstractOperation<?, ?>>();
+  private boolean logged = true;
+
+  public BatchOperation(AbstractSessionOperations sessionOperations) {
+    super(sessionOperations);
+    batch = new BatchStatement();
+  }
+
+  public void add(AbstractOperation<?, ?> operation) {
+    operations.add(operation);
+  }
+
+  @Override
+  public BatchStatement buildStatement(boolean cached) {
+    batch.addAll(
+        operations.stream().map(o -> o.buildStatement(cached)).collect(Collectors.toList()));
+    batch.setConsistencyLevel(sessionOps.getDefaultConsistencyLevel());
+    return batch;
+  }
+
+  public BatchOperation logged() {
+    logged = true;
+    return this;
+  }
+
+  public BatchOperation setLogged(boolean logStatements) {
+    logged = logStatements;
+    return this;
+  }
+
+  public Long sync() {
+    if (operations.size() == 0) return 0L;
+    final Timer.Context context = requestLatency.time();
+    try {
+        batch.setDefaultTimestamp(timestampGenerator.next());
+        ResultSet resultSet =
+                this.execute(
+                        sessionOps, null, queryExecutionTimeout, queryTimeoutUnits, showValues, false);
+        if (!resultSet.wasApplied()) {
+            throw new HelenusException("Failed to apply batch.");
+        }
+    } catch (TimeoutException e) {
+        throw new HelenusException(e);
+    } finally {
+      context.stop();
+    }
+    return batch.getDefaultTimestamp();
+  }
+
+  public Long sync(UnitOfWork uow) {
+    if (operations.size() == 0) return 0L;
+    if (uow == null) return sync();
+
+    final Timer.Context context = requestLatency.time();
+    final Stopwatch timer = Stopwatch.createStarted();
+    try {
+        uow.recordCacheAndDatabaseOperationCount(0, 1);
+        batch.setDefaultTimestamp(timestampGenerator.next());
+        ResultSet resultSet =
+                this.execute(
+                        sessionOps, uow, queryExecutionTimeout, queryTimeoutUnits, showValues, false);
+        if (!resultSet.wasApplied()) {
+            throw new HelenusException("Failed to apply batch.");
+        }
+    } catch (TimeoutException e) {
+        throw new HelenusException(e);
+    } finally {
+      context.stop();
+      timer.stop();
+    }
+    uow.addDatabaseTime("Cassandra", timer);
+    return batch.getDefaultTimestamp();
+  }
+
+  public void addAll(BatchOperation batch) {
+    batch.operations.forEach(o -> this.operations.add(o));
+  }
+
+  public String toString() {
+    return toString(true); //TODO(gburd): sessionOps.showQueryValues()
+  }
+
+  public String toString(boolean showValues) {
+    StringBuilder s = new StringBuilder();
+    s.append("BEGIN ");
+    if (!logged) {
+      s.append("UNLOGGED ");
+    }
+    s.append("BATCH ");
+
+    if (batch.getDefaultTimestamp() > -9223372036854775808L) {
+      s.append("USING TIMESTAMP ").append(String.valueOf(batch.getDefaultTimestamp())).append(" ");
+    }
+    s.append(
+        operations
+            .stream()
+            .map(o -> Operation.queryString(o.buildStatement(showValues), showValues))
+            .collect(Collectors.joining(" ")));
+    s.append(" APPLY BATCH;");
+    return s.toString();
+  }
+}

src/main/java/net/helenus/core/operation/BoundOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -36,8 +37,12 @@ public final class BoundOperation<E> extends AbstractOperation<E, BoundOperation
   }
 
   @Override
-	public Statement buildStatement() {
+  public Statement buildStatement(boolean cached) {
     return boundStatement;
   }
 
+  @Override
+  public boolean isSessionCacheable() {
+    return delegate.isSessionCacheable();
+  }
 }

src/main/java/net/helenus/core/operation/BoundOptionalOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,18 +16,19 @@
  */
 package net.helenus.core.operation;
 
-import java.util.Optional;
-
 import com.datastax.driver.core.BoundStatement;
 import com.datastax.driver.core.ResultSet;
 import com.datastax.driver.core.Statement;
+import java.util.Optional;
 
-public final class BoundOptionalOperation<E> extends AbstractOptionalOperation<E, BoundOptionalOperation<E>> {
+public final class BoundOptionalOperation<E>
+    extends AbstractOptionalOperation<E, BoundOptionalOperation<E>> {
 
   private final BoundStatement boundStatement;
   private final AbstractOptionalOperation<E, ?> delegate;
 
-	public BoundOptionalOperation(BoundStatement boundStatement, AbstractOptionalOperation<E, ?> operation) {
+  public BoundOptionalOperation(
+      BoundStatement boundStatement, AbstractOptionalOperation<E, ?> operation) {
     super(operation.sessionOps);
     this.boundStatement = boundStatement;
     this.delegate = operation;
@@ -38,8 +40,12 @@ public final class BoundOptionalOperation<E> extends AbstractOptionalOperation<E
   }
 
   @Override
-	public Statement buildStatement() {
+  public Statement buildStatement(boolean cached) {
     return boundStatement;
   }
 
+  @Override
+  public boolean isSessionCacheable() {
+    return delegate.isSessionCacheable();
+  }
 }

src/main/java/net/helenus/core/operation/BoundStreamOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,31 +16,43 @@
  */
 package net.helenus.core.operation;
 
-import java.util.stream.Stream;
-
 import com.datastax.driver.core.BoundStatement;
 import com.datastax.driver.core.ResultSet;
 import com.datastax.driver.core.Statement;
+import java.util.List;
+import java.util.stream.Stream;
+import net.helenus.core.cache.Facet;
 
-public final class BoundStreamOperation<E> extends AbstractStreamOperation<E, BoundStreamOperation<E>> {
+public final class BoundStreamOperation<E>
+    extends AbstractStreamOperation<E, BoundStreamOperation<E>> {
 
   private final BoundStatement boundStatement;
   private final AbstractStreamOperation<E, ?> delegate;
 
-	public BoundStreamOperation(BoundStatement boundStatement, AbstractStreamOperation<E, ?> operation) {
+  public BoundStreamOperation(
+      BoundStatement boundStatement, AbstractStreamOperation<E, ?> operation) {
     super(operation.sessionOps);
     this.boundStatement = boundStatement;
     this.delegate = operation;
   }
 
+  @Override
+  public List<Facet> bindFacetValues() {
+    return delegate.bindFacetValues();
+  }
+
   @Override
   public Stream<E> transform(ResultSet resultSet) {
     return delegate.transform(resultSet);
   }
 
   @Override
-	public Statement buildStatement() {
+  public Statement buildStatement(boolean cached) {
     return boundStatement;
   }
 
+  @Override
+  public boolean isSessionCacheable() {
+    return delegate.isSessionCacheable();
+  }
 }

src/main/java/net/helenus/core/operation/CountOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -20,7 +21,6 @@ import com.datastax.driver.core.querybuilder.BuiltStatement;
 import com.datastax.driver.core.querybuilder.QueryBuilder;
 import com.datastax.driver.core.querybuilder.Select;
 import com.datastax.driver.core.querybuilder.Select.Where;
-
 import net.helenus.core.AbstractSessionOperations;
 import net.helenus.core.Filter;
 import net.helenus.core.reflect.HelenusPropertyNode;
@@ -38,10 +38,11 @@ public final class CountOperation extends AbstractFilterOperation<Long, CountOpe
   public CountOperation(AbstractSessionOperations sessionOperations, HelenusEntity entity) {
     super(sessionOperations);
     this.entity = entity;
+    //TODO(gburd): cache SELECT COUNT results within the scope of a UOW
   }
 
   @Override
-	public BuiltStatement buildStatement() {
+  public BuiltStatement buildStatement(boolean cached) {
 
     if (filters != null && !filters.isEmpty()) {
       filters.forEach(f -> addPropertyNode(f.getNode()));
@@ -74,9 +75,11 @@ public final class CountOperation extends AbstractFilterOperation<Long, CountOpe
     if (entity == null) {
       entity = p.getEntity();
     } else if (entity != p.getEntity()) {
-			throw new HelenusMappingException("you can count columns only in single entity "
-					+ entity.getMappingInterface() + " or " + p.getEntity().getMappingInterface());
+      throw new HelenusMappingException(
+          "you can count columns only in single entity "
+              + entity.getMappingInterface()
+              + " or "
+              + p.getEntity().getMappingInterface());
     }
   }
-
 }

src/main/java/net/helenus/core/operation/DeleteOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -20,11 +21,15 @@ import com.datastax.driver.core.querybuilder.BuiltStatement;
 import com.datastax.driver.core.querybuilder.Delete;
 import com.datastax.driver.core.querybuilder.Delete.Where;
 import com.datastax.driver.core.querybuilder.QueryBuilder;
-
+import java.util.List;
+import java.util.concurrent.TimeoutException;
 import net.helenus.core.AbstractSessionOperations;
 import net.helenus.core.Filter;
+import net.helenus.core.UnitOfWork;
+import net.helenus.core.cache.Facet;
 import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.mapping.HelenusEntity;
+import net.helenus.support.HelenusException;
 import net.helenus.support.HelenusMappingException;
 
 public final class DeleteOperation extends AbstractFilterOperation<ResultSet, DeleteOperation> {
@@ -47,7 +52,7 @@ public final class DeleteOperation extends AbstractFilterOperation<ResultSet, De
   }
 
   @Override
-	public BuiltStatement buildStatement() {
+  public BuiltStatement buildStatement(boolean cached) {
 
     if (filters != null && !filters.isEmpty()) {
       filters.forEach(f -> addPropertyNode(f.getNode()));
@@ -118,8 +123,53 @@ public final class DeleteOperation extends AbstractFilterOperation<ResultSet, De
     if (entity == null) {
       entity = p.getEntity();
     } else if (entity != p.getEntity()) {
-			throw new HelenusMappingException("you can delete rows only in single entity "
-					+ entity.getMappingInterface() + " or " + p.getEntity().getMappingInterface());
+      throw new HelenusMappingException(
+          "you can delete rows only in single entity "
+              + entity.getMappingInterface()
+              + " or "
+              + p.getEntity().getMappingInterface());
     }
   }
+
+  public List<Facet> bindFacetValues() {
+    return bindFacetValues(getFacets());
+  }
+
+  protected boolean isIdempotentOperation() {
+    return true;
+  }
+
+  @Override
+  public ResultSet sync() throws TimeoutException {
+    ResultSet result = super.sync();
+    if (entity.isCacheable()) {
+      sessionOps.cacheEvict(bindFacetValues());
+    }
+    return result;
+  }
+
+  @Override
+  public ResultSet sync(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) {
+      return sync();
+    }
+    ResultSet result = super.sync(uow);
+    uow.cacheEvict(bindFacetValues());
+    return result;
+  }
+
+  public ResultSet batch(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) {
+      throw new HelenusException("UnitOfWork cannot be null when batching operations.");
+    }
+
+    uow.cacheEvict(bindFacetValues());
+    uow.batch(this);
+    return null;
+  }
+
+  @Override
+  public List<Facet> getFacets() {
+    return entity.getFacets();
+  }
 }

src/main/java/net/helenus/core/operation/InsertOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,59 +16,110 @@
  */
 package net.helenus.core.operation;
 
-import java.util.*;
-
 import com.datastax.driver.core.ResultSet;
 import com.datastax.driver.core.querybuilder.BuiltStatement;
 import com.datastax.driver.core.querybuilder.Insert;
 import com.datastax.driver.core.querybuilder.QueryBuilder;
-
-import com.google.common.base.Predicates;
-import com.google.common.collect.Lists;
-import com.google.common.collect.Maps;
+import java.util.*;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Function;
+import java.util.stream.Collectors;
 import net.helenus.core.AbstractSessionOperations;
 import net.helenus.core.Getter;
+import net.helenus.core.Helenus;
+import net.helenus.core.UnitOfWork;
+import net.helenus.core.cache.CacheUtil;
+import net.helenus.core.cache.Facet;
+import net.helenus.core.cache.UnboundFacet;
+import net.helenus.core.reflect.DefaultPrimitiveTypes;
 import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.core.reflect.MapExportable;
-import net.helenus.mapping.ColumnType;
 import net.helenus.mapping.HelenusEntity;
 import net.helenus.mapping.HelenusProperty;
 import net.helenus.mapping.MappingUtil;
 import net.helenus.mapping.value.BeanColumnValueProvider;
 import net.helenus.support.Fun;
+import net.helenus.support.HelenusException;
 import net.helenus.support.HelenusMappingException;
 
-public final class InsertOperation extends AbstractOperation<ResultSet, InsertOperation> {
+public final class InsertOperation<T> extends AbstractOperation<T, InsertOperation<T>> {
 
+  private final List<Fun.Tuple2<HelenusPropertyNode, Object>> values =
+      new ArrayList<Fun.Tuple2<HelenusPropertyNode, Object>>();
+  private final T pojo;
+  private final Class<?> resultType;
+  private final Set<String> readSet;
   private HelenusEntity entity;
-
-	private final List<Fun.Tuple2<HelenusPropertyNode, Object>> values = new ArrayList<Fun.Tuple2<HelenusPropertyNode, Object>>();
   private boolean ifNotExists;
 
   private int[] ttl;
   private long[] timestamp;
+  private long writeTime = 0L;
 
   public InsertOperation(AbstractSessionOperations sessionOperations, boolean ifNotExists) {
     super(sessionOperations);
 
+    this.pojo = null;
+    this.readSet = null;
     this.ifNotExists = ifNotExists;
+    this.resultType = ResultSet.class;
   }
 
-	public InsertOperation(AbstractSessionOperations sessionOperations, HelenusEntity entity, Object pojo,
+  public InsertOperation(
+      AbstractSessionOperations sessionOperations,
+      HelenusEntity entity,
+      Class<?> resultType,
       boolean ifNotExists) {
     super(sessionOperations);
 
+    this.pojo = null;
+    this.readSet = null;
+    this.ifNotExists = ifNotExists;
+    this.resultType = resultType;
+    this.entity = entity;
+  }
+
+  public InsertOperation(
+      AbstractSessionOperations sessionOperations, Class<?> resultType, boolean ifNotExists) {
+    super(sessionOperations);
+
+    this.pojo = null;
+    this.readSet = null;
+    this.ifNotExists = ifNotExists;
+    this.resultType = resultType;
+  }
+
+  public InsertOperation(
+      AbstractSessionOperations sessionOperations,
+      HelenusEntity entity,
+      T pojo,
+      Set<String> mutations,
+      Set<String> read,
+      boolean ifNotExists) {
+    super(sessionOperations);
+
+    this.pojo = pojo;
+    this.readSet = read;
     this.entity = entity;
     this.ifNotExists = ifNotExists;
-        Set<String> keys = (pojo instanceof MapExportable) ? ((MapExportable)pojo).toMap().keySet() : null;
+    this.resultType = entity.getMappingInterface();
+
     Collection<HelenusProperty> properties = entity.getOrderedProperties();
+    Set<String> keys = (mutations == null) ? null : mutations;
 
     for (HelenusProperty prop : properties) {
+      boolean addProp = false;
 
-            // Skip properties that are not in the map of the pojo we're storing.  This creates a path
-            // for entity instances to be {in,up}serted without including all columns in the INSERT statement.
-		    if (keys == null || keys.contains(prop.getPropertyName())) {
+      switch (prop.getColumnType()) {
+        case PARTITION_KEY:
+        case CLUSTERING_COLUMN:
+          addProp = true;
+          break;
+        default:
+          addProp = (keys == null || keys.contains(prop.getPropertyName()));
+      }
 
+      if (addProp) {
         Object value = BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop);
         value = sessionOps.getValuePreparer().prepareColumnValue(value, prop);
 
@@ -75,24 +127,21 @@ public final class InsertOperation extends AbstractOperation<ResultSet, InsertOp
           HelenusPropertyNode node = new HelenusPropertyNode(prop, Optional.empty());
           values.add(Fun.Tuple2.of(node, value));
         }
-
+      }
+    }
   }
 
-		}
-
-	}
-
-	public InsertOperation ifNotExists() {
+  public InsertOperation<T> ifNotExists() {
     this.ifNotExists = true;
     return this;
   }
 
-	public InsertOperation ifNotExists(boolean enable) {
+  public InsertOperation<T> ifNotExists(boolean enable) {
     this.ifNotExists = enable;
     return this;
   }
 
-	public <V> InsertOperation value(Getter<V> getter, V val) {
+  public <V> InsertOperation<T> value(Getter<V> getter, V val) {
 
     Objects.requireNonNull(getter, "getter is empty");
 
@@ -109,12 +158,35 @@ public final class InsertOperation extends AbstractOperation<ResultSet, InsertOp
   }
 
   @Override
-	public BuiltStatement buildStatement() {
+  public BuiltStatement buildStatement(boolean cached) {
+    List<HelenusEntity> entities =
+        values
+            .stream()
+            .map(t -> t._1.getProperty().getEntity())
+            .distinct()
+            .collect(Collectors.toList());
+    if (entities.size() != 1) {
+      throw new HelenusMappingException(
+          "you can insert only single entity at a time, found: "
+              + entities
+                  .stream()
+                  .map(e -> e.getMappingInterface().toString())
+                  .collect(Collectors.joining(", ")));
+    }
+    HelenusEntity entity = entities.get(0);
+    if (this.entity != null) {
+      if (this.entity != entity) {
+        throw new HelenusMappingException(
+            "you can insert only single entity at a time, found: "
+                + this.entity.getMappingInterface().toString()
+                + ", "
+                + entity.getMappingInterface().toString());
+      }
+    } else {
+      this.entity = entity;
+    }
 
-		values.forEach(t -> addPropertyNode(t._1));
-
-		if (values.isEmpty())
-		    return null;
+    if (values.isEmpty()) return null;
 
     if (entity == null) {
       throw new HelenusMappingException("unknown entity");
@@ -126,10 +198,13 @@ public final class InsertOperation extends AbstractOperation<ResultSet, InsertOp
       insert.ifNotExists();
     }
 
-		values.forEach(t -> {
+    values.forEach(
+        t -> {
           insert.value(t._1.getColumnName(), t._2);
         });
 
+    //TODO(gburd): IF NOT EXISTS when @Constraints.Relationship is 1:1 or 1:m
+
     if (this.ttl != null) {
       insert.using(QueryBuilder.ttl(this.ttl[0]));
     }
@@ -140,29 +215,210 @@ public final class InsertOperation extends AbstractOperation<ResultSet, InsertOp
     return insert;
   }
 
-	@Override
-	public ResultSet transform(ResultSet resultSet) {
-		return resultSet;
+  private T newInstance(Class<?> iface) {
+    if (values.size() > 0) {
+      boolean immutable = entity.isDraftable();
+      Collection<HelenusProperty> properties = entity.getOrderedProperties();
+      Map<String, Object> backingMap = new HashMap<String, Object>(properties.size());
+
+      // First, add all the inserted values into our new map.
+      values.forEach(t -> backingMap.put(t._1.getProperty().getPropertyName(), t._2));
+
+      // Then, fill in all the rest of the properties.
+      for (HelenusProperty prop : properties) {
+        String key = prop.getPropertyName();
+        if (backingMap.containsKey(key)) {
+          // Some values man need to be converted (e.g. from String to Enum). This is done
+          // within the BeanColumnValueProvider below.
+          Optional<Function<Object, Object>> converter =
+              prop.getReadConverter(sessionOps.getSessionRepository());
+          if (converter.isPresent()) {
+            backingMap.put(key, converter.get().apply(backingMap.get(key)));
+          }
+        } else {
+          // If we started this operation with an instance of this type, use values from
+          // that.
+          if (pojo != null) {
+            backingMap.put(
+                key, BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, immutable));
+          } else {
+            // Otherwise we'll use default values for the property type if available.
+            Class<?> propType = prop.getJavaType();
+            if (propType.isPrimitive()) {
+              DefaultPrimitiveTypes type = DefaultPrimitiveTypes.lookup(propType);
+              if (type == null) {
+                throw new HelenusException("unknown primitive type " + propType);
+              }
+              backingMap.put(key, type.getDefaultValue());
+            }
+          }
+        }
       }
 
-	public InsertOperation usingTtl(int ttl) {
+      // Lastly, create a new proxy object for the entity and return the new instance.
+      return (T) Helenus.map(iface, backingMap);
+    }
+    return null;
+  }
+
+  @Override
+  public T transform(ResultSet resultSet) {
+    if ((ifNotExists == true) && (resultSet.wasApplied() == false)) {
+      throw new HelenusException("Statement was not applied due to consistency constraints");
+    }
+
+    Class<?> iface = entity.getMappingInterface();
+    if (resultType == iface) {
+      T o = newInstance(iface);
+      if (o == null) {
+        // Oddly, this insert didn't change anything so simply return the pojo.
+        return (T) pojo;
+      }
+      return o;
+    }
+    return (T) resultSet;
+  }
+
+  public InsertOperation<T> usingTtl(int ttl) {
     this.ttl = new int[1];
     this.ttl[0] = ttl;
     return this;
   }
 
-	public InsertOperation usingTimestamp(long timestamp) {
+  public InsertOperation<T> usingTimestamp(long timestamp) {
     this.timestamp = new long[1];
     this.timestamp[0] = timestamp;
     return this;
   }
 
-	private void addPropertyNode(HelenusPropertyNode p) {
-		if (entity == null) {
-			entity = p.getEntity();
-		} else if (entity != p.getEntity()) {
-			throw new HelenusMappingException("you can insert only single entity " + entity.getMappingInterface()
-					+ " or " + p.getEntity().getMappingInterface());
+  protected void adjustTtlAndWriteTime(MapExportable pojo) {
+    if (ttl != null || writeTime != 0L) {
+      List<String> columnNames =
+          values
+              .stream()
+              .map(t -> t._1.getProperty())
+              .filter(
+                  prop -> {
+                    switch (prop.getColumnType()) {
+                      case PARTITION_KEY:
+                      case CLUSTERING_COLUMN:
+                        return false;
+                      default:
+                        return true;
+                    }
+                  })
+              .map(prop -> prop.getColumnName().toCql(false))
+              .collect(Collectors.toList());
+
+      if (columnNames.size() > 0) {
+        if (ttl != null) {
+          columnNames.forEach(name -> pojo.put(CacheUtil.ttlKey(name), ttl));
+        }
+        if (writeTime != 0L) {
+          columnNames.forEach(name -> pojo.put(CacheUtil.writeTimeKey(name), writeTime));
+        }
+      }
+    }
+  }
+
+  @Override
+  protected boolean isIdempotentOperation() {
+    return values.stream().map(v -> v._1.getProperty()).allMatch(prop -> prop.isIdempotent())
+        || super.isIdempotentOperation();
+  }
+
+  @Override
+  public T sync() throws TimeoutException {
+    T result = super.sync();
+    if (entity.isCacheable() && result != null) {
+      adjustTtlAndWriteTime((MapExportable) result);
+      sessionOps.updateCache(result, bindFacetValues());
+    }
+    return result;
+  }
+
+  @Override
+  public T sync(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) {
+      return sync();
+    }
+    T result = super.sync(uow);
+    if (result != null && pojo != null && !(pojo == result) && pojo.equals(result)) {
+      // To preserve object identity we need to find this object in cache
+      // because it was unchanged by the INSERT but pojo in this case was
+      // the result of a draft.build().
+      T cachedValue = (T) uow.cacheLookup(bindFacetValues());
+      if (cachedValue != null) {
+        result = cachedValue;
+      }
+    }
+    Class<?> iface = entity.getMappingInterface();
+    if (resultType == iface) {
+      if (entity != null && MapExportable.class.isAssignableFrom(entity.getMappingInterface())) {
+        adjustTtlAndWriteTime((MapExportable) result);
+      }
+      cacheUpdate(uow, result, bindFacetValues());
+    }
+    return result;
+  }
+
+  public T batch(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) {
+      throw new HelenusException("UnitOfWork cannot be null when batching operations.");
+    }
+
+    if (this.entity != null) {
+      Class<?> iface = this.entity.getMappingInterface();
+      if (resultType == iface) {
+        final T result = (pojo == null) ? newInstance(iface) : pojo;
+        if (result != null) {
+          adjustTtlAndWriteTime((MapExportable) result);
+          cacheUpdate(uow, result, bindFacetValues());
+        }
+        uow.batch(this);
+        return (T) result;
+      }
+    }
+
+    return sync(uow);
+  }
+
+  @Override
+  public List<Facet> bindFacetValues() {
+    List<Facet> facets = getFacets();
+    if (facets == null || facets.size() == 0) {
+      return new ArrayList<Facet>();
+    }
+    List<Facet> boundFacets = new ArrayList<>();
+    Map<HelenusProperty, Object> valuesMap = new HashMap<>(values.size());
+    values.forEach(t -> valuesMap.put(t._1.getProperty(), t._2));
+
+    for (Facet facet : facets) {
+      if (facet instanceof UnboundFacet) {
+        UnboundFacet unboundFacet = (UnboundFacet) facet;
+        UnboundFacet.Binder binder = unboundFacet.binder();
+        for (HelenusProperty prop : unboundFacet.getProperties()) {
+          Object value = valuesMap.get(prop);
+          if (value != null) {
+            binder.setValueForProperty(prop, value.toString());
+          }
+        }
+        if (binder.isBound()) {
+          boundFacets.add(binder.bind());
+        }
+      } else {
+        boundFacets.add(facet);
+      }
+    }
+    return boundFacets;
+  }
+
+  @Override
+  public List<Facet> getFacets() {
+    if (entity != null) {
+      return entity.getFacets();
+    } else {
+      return new ArrayList<Facet>();
     }
   }
 }

src/main/java/net/helenus/core/operation/Operation.java

@@ -0,0 +1,211 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+package net.helenus.core.operation;
+
+import com.codahale.metrics.Meter;
+import com.codahale.metrics.MetricRegistry;
+import com.codahale.metrics.Timer;
+import com.datastax.driver.core.*;
+import com.datastax.driver.core.querybuilder.BuiltStatement;
+import com.google.common.base.Stopwatch;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.stream.Collectors;
+import net.helenus.core.AbstractSessionOperations;
+import net.helenus.core.UnitOfWork;
+import net.helenus.core.cache.Facet;
+import net.helenus.support.HelenusException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public abstract class Operation<E> {
+
+  private static final Logger LOG = LoggerFactory.getLogger(Operation.class);
+
+  protected final AbstractSessionOperations sessionOps;
+  protected boolean showValues;
+  protected long queryExecutionTimeout = 10;
+  protected TimeUnit queryTimeoutUnits = TimeUnit.SECONDS;
+  protected final Meter uowCacheHits;
+  protected final Meter uowCacheMiss;
+  protected final Meter sessionCacheHits;
+  protected final Meter sessionCacheMiss;
+  protected final Meter cacheHits;
+  protected final Meter cacheMiss;
+  protected final Timer requestLatency;
+
+  Operation(AbstractSessionOperations sessionOperations) {
+    this.sessionOps = sessionOperations;
+    this.showValues = sessionOps.showValues();
+    MetricRegistry metrics = sessionOperations.getMetricRegistry();
+    if (metrics == null) {
+      metrics = new MetricRegistry();
+    }
+    this.uowCacheHits = metrics.meter("net.helenus.UOW-cache-hits");
+    this.uowCacheMiss = metrics.meter("net.helenus.UOW-cache-miss");
+    this.sessionCacheHits = metrics.meter("net.helenus.session-cache-hits");
+    this.sessionCacheMiss = metrics.meter("net.helenus.session-cache-miss");
+    this.cacheHits = metrics.meter("net.helenus.cache-hits");
+    this.cacheMiss = metrics.meter("net.helenus.cache-miss");
+    this.requestLatency = metrics.timer("net.helenus.request-latency");
+  }
+
+  public static String queryString(BatchOperation operation, boolean includeValues) {
+    return operation.toString(includeValues);
+  }
+
+  public static String queryString(Statement statement, boolean includeValues) {
+    String query = null;
+    if (statement instanceof BuiltStatement) {
+      BuiltStatement builtStatement = (BuiltStatement) statement;
+      if (includeValues) {
+        RegularStatement regularStatement = builtStatement.setForceNoValues(true);
+        query = regularStatement.getQueryString();
+      } else {
+        query = builtStatement.getQueryString();
+      }
+    } else if (statement instanceof RegularStatement) {
+      RegularStatement regularStatement = (RegularStatement) statement;
+      query = regularStatement.getQueryString();
+    } else {
+      query = statement.toString();
+    }
+    return query;
+  }
+
+  public ResultSet execute(
+      AbstractSessionOperations session,
+      UnitOfWork uow,
+      long timeout,
+      TimeUnit units,
+      boolean showValues,
+      boolean cached)
+      throws TimeoutException {
+
+    Statement statement = options(buildStatement(cached));
+
+    if (session.isShowCql()) {
+      String stmt =
+          (this instanceof BatchOperation)
+              ? queryString((BatchOperation) this, showValues)
+              : queryString(statement, showValues);
+      session.getPrintStream().println(stmt);
+    } else if (LOG.isDebugEnabled()) {
+      String stmt =
+          (this instanceof BatchOperation)
+              ? queryString((BatchOperation) this, showValues)
+              : queryString(statement, showValues);
+      LOG.info("CQL> " + stmt);
+    }
+
+    Stopwatch timer = Stopwatch.createStarted();
+    try {
+      ResultSetFuture futureResultSet = session.executeAsync(statement, uow, timer);
+      if (uow != null) uow.recordCacheAndDatabaseOperationCount(0, 1);
+      ResultSet resultSet = futureResultSet.getUninterruptibly(timeout, units);
+      ColumnDefinitions columnDefinitions = resultSet.getColumnDefinitions();
+      if (LOG.isDebugEnabled()) {
+        ExecutionInfo ei = resultSet.getExecutionInfo();
+        Host qh = ei.getQueriedHost();
+        String oh =
+            ei.getTriedHosts()
+                .stream()
+                .map(Host::getAddress)
+                .map(InetAddress::toString)
+                .collect(Collectors.joining(", "));
+        ConsistencyLevel cl = ei.getAchievedConsistencyLevel();
+        if (cl == null) {
+          cl = statement.getConsistencyLevel();
+        }
+        int se = ei.getSpeculativeExecutions();
+        String warn = ei.getWarnings().stream().collect(Collectors.joining(", "));
+        String ri =
+            String.format(
+                "%s %s ~%s %s %s%s%sspec-retries: %d",
+                "server v" + qh.getCassandraVersion(),
+                qh.getAddress().toString(),
+                (oh != null && !oh.equals("")) ? " [tried: " + oh + "]" : "",
+                qh.getDatacenter(),
+                qh.getRack(),
+                (cl != null)
+                    ? (" consistency: "
+                        + cl.name()
+                        + " "
+                        + (cl.isDCLocal() ? " DC " : "")
+                        + (cl.isSerial() ? " SC " : ""))
+                    : "",
+                (warn != null && !warn.equals("")) ? ": " + warn : "",
+                se);
+        if (uow != null) uow.setInfo(ri);
+        else LOG.debug(ri);
+      }
+      if (!resultSet.wasApplied()
+          && !(columnDefinitions.size() > 1 || !columnDefinitions.contains("[applied]"))) {
+        throw new HelenusException("Operation Failed");
+      }
+      return resultSet;
+
+    } finally {
+      timer.stop();
+      if (uow != null) uow.addDatabaseTime("Cassandra", timer);
+      log(statement, uow, timer, showValues);
+    }
+  }
+
+  void log(Statement statement, UnitOfWork uow, Stopwatch timer, boolean showValues) {
+    if (LOG.isInfoEnabled()) {
+      String uowString = "";
+      if (uow != null) {
+        uowString = "UOW(" + uow.hashCode() + ")";
+      }
+      String timerString = "";
+      if (timer != null) {
+        timerString = String.format(" %s ", timer.toString());
+      }
+      LOG.info(
+          String.format(
+              "%s%s%s", uowString, timerString, Operation.queryString(statement, showValues)));
+    }
+  }
+
+  protected boolean isIdempotentOperation() {
+    return false;
+  }
+
+  public Statement options(Statement statement) {
+    return statement;
+  }
+
+  public Statement buildStatement(boolean cached) {
+    return null;
+  }
+
+  public List<Facet> getFacets() {
+    return new ArrayList<Facet>();
+  }
+
+  public List<Facet> bindFacetValues() {
+    return null;
+  }
+
+  public boolean isSessionCacheable() {
+    return false;
+  }
+}

src/main/java/net/helenus/core/operation/PreparedOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -43,5 +44,4 @@ public final class PreparedOperation<E> {
   public String toString() {
     return preparedStatement.getQueryString();
   }
-
 }

src/main/java/net/helenus/core/operation/PreparedOptionalOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -23,7 +24,8 @@ public final class PreparedOptionalOperation<E> {
   private final PreparedStatement preparedStatement;
   private final AbstractOptionalOperation<E, ?> operation;
 
-	public PreparedOptionalOperation(PreparedStatement statement, AbstractOptionalOperation<E, ?> operation) {
+  public PreparedOptionalOperation(
+      PreparedStatement statement, AbstractOptionalOperation<E, ?> operation) {
     this.preparedStatement = statement;
     this.operation = operation;
   }
@@ -43,5 +45,4 @@ public final class PreparedOptionalOperation<E> {
   public String toString() {
     return preparedStatement.getQueryString();
   }
-
 }

src/main/java/net/helenus/core/operation/PreparedStreamOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -23,7 +24,8 @@ public final class PreparedStreamOperation<E> {
   private final PreparedStatement preparedStatement;
   private final AbstractStreamOperation<E, ?> operation;
 
-	public PreparedStreamOperation(PreparedStatement statement, AbstractStreamOperation<E, ?> operation) {
+  public PreparedStreamOperation(
+      PreparedStatement statement, AbstractStreamOperation<E, ?> operation) {
     this.preparedStatement = statement;
     this.operation = operation;
   }
@@ -33,9 +35,7 @@ public final class PreparedStreamOperation<E> {
   }
 
   public BoundStreamOperation<E> bind(Object... params) {
-
     BoundStatement boundStatement = preparedStatement.bind(params);
-
     return new BoundStreamOperation<E>(boundStatement, operation);
   }
 
@@ -43,5 +43,4 @@ public final class PreparedStreamOperation<E> {
   public String toString() {
     return preparedStatement.getQueryString();
   }
-
 }

src/main/java/net/helenus/core/operation/SelectFirstOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,36 +16,57 @@
  */
 package net.helenus.core.operation;
 
-import java.util.Optional;
-import java.util.function.Function;
-
 import com.datastax.driver.core.ResultSet;
 import com.datastax.driver.core.querybuilder.BuiltStatement;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Function;
+import net.helenus.core.cache.Facet;
 
-public final class SelectFirstOperation<E> extends AbstractFilterOptionalOperation<E, SelectFirstOperation<E>> {
+public final class SelectFirstOperation<E>
+    extends AbstractFilterOptionalOperation<E, SelectFirstOperation<E>> {
 
-	private final SelectOperation<E> src;
+  private final SelectOperation<E> delegate;
 
-	public SelectFirstOperation(SelectOperation<E> src) {
-		super(src.sessionOps);
+  public SelectFirstOperation(SelectOperation<E> delegate) {
+    super(delegate.sessionOps);
 
-		this.src = src;
-		this.filters = src.filters;
-		this.ifFilters = src.ifFilters;
+    this.delegate = delegate;
+    this.filters = delegate.filters;
+    this.ifFilters = delegate.ifFilters;
   }
 
   public <R> SelectFirstTransformingOperation<R, E> map(Function<E, R> fn) {
-		return new SelectFirstTransformingOperation<R, E>(src, fn);
+    return new SelectFirstTransformingOperation<R, E>(delegate, fn);
   }
 
   @Override
-	public BuiltStatement buildStatement() {
-		return src.buildStatement();
+  public BuiltStatement buildStatement(boolean cached) {
+    return delegate.buildStatement(cached);
+  }
+
+  @Override
+  public List<Facet> getFacets() {
+    return delegate.getFacets();
+  }
+
+  @Override
+  public List<Facet> bindFacetValues() {
+    return delegate.bindFacetValues();
   }
 
   @Override
   public Optional<E> transform(ResultSet resultSet) {
-		return src.transform(resultSet).findFirst();
+    return delegate.transform(resultSet).findFirst();
   }
 
+  @Override
+  public boolean isSessionCacheable() {
+    return delegate.isSessionCacheable();
+  }
+
+  @Override
+  public boolean ignoreCache() {
+    return delegate.ignoreCache();
+  }
 }

src/main/java/net/helenus/core/operation/SelectFirstTransformingOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,36 +16,50 @@
  */
 package net.helenus.core.operation;
 
-import java.util.Optional;
-import java.util.function.Function;
-
 import com.datastax.driver.core.ResultSet;
 import com.datastax.driver.core.querybuilder.BuiltStatement;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Function;
+import net.helenus.core.cache.Facet;
 
 public final class SelectFirstTransformingOperation<R, E>
-		extends
-			AbstractFilterOptionalOperation<R, SelectFirstTransformingOperation<R, E>> {
+    extends AbstractFilterOptionalOperation<R, SelectFirstTransformingOperation<R, E>> {
 
-	private final SelectOperation<E> src;
+  private final SelectOperation<E> delegate;
   private final Function<E, R> fn;
 
-	public SelectFirstTransformingOperation(SelectOperation<E> src, Function<E, R> fn) {
-		super(src.sessionOps);
+  public SelectFirstTransformingOperation(SelectOperation<E> delegate, Function<E, R> fn) {
+    super(delegate.sessionOps);
 
-		this.src = src;
+    this.delegate = delegate;
     this.fn = fn;
-		this.filters = src.filters;
-		this.ifFilters = src.ifFilters;
+    this.filters = delegate.filters;
+    this.ifFilters = delegate.ifFilters;
   }
 
   @Override
-	public BuiltStatement buildStatement() {
-		return src.buildStatement();
+  public List<Facet> bindFacetValues() {
+    return delegate.bindFacetValues();
+  }
+
+  @Override
+  public BuiltStatement buildStatement(boolean cached) {
+    return delegate.buildStatement(cached);
   }
 
   @Override
   public Optional<R> transform(ResultSet resultSet) {
-		return src.transform(resultSet).findFirst().map(fn);
+    return delegate.transform(resultSet).findFirst().map(fn);
   }
 
+  @Override
+  public boolean isSessionCacheable() {
+    return delegate.isSessionCacheable();
+  }
+
+  @Override
+  public boolean ignoreCache() {
+    return delegate.ignoreCache();
+  }
 }

src/main/java/net/helenus/core/operation/SelectOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,11 +16,6 @@
  */
 package net.helenus.core.operation;
 
-import java.util.*;
-import java.util.function.Function;
-import java.util.stream.Stream;
-import java.util.stream.StreamSupport;
-
 import com.datastax.driver.core.ResultSet;
 import com.datastax.driver.core.Row;
 import com.datastax.driver.core.querybuilder.BuiltStatement;
@@ -28,30 +24,47 @@ import com.datastax.driver.core.querybuilder.QueryBuilder;
 import com.datastax.driver.core.querybuilder.Select;
 import com.datastax.driver.core.querybuilder.Select.Selection;
 import com.datastax.driver.core.querybuilder.Select.Where;
-
+import java.util.*;
+import java.util.function.Function;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
 import net.helenus.core.*;
+import net.helenus.core.cache.CacheUtil;
+import net.helenus.core.cache.Facet;
+import net.helenus.core.cache.UnboundFacet;
+import net.helenus.core.reflect.Entity;
 import net.helenus.core.reflect.HelenusPropertyNode;
 import net.helenus.mapping.HelenusEntity;
+import net.helenus.mapping.HelenusProperty;
 import net.helenus.mapping.MappingUtil;
 import net.helenus.mapping.OrderingDirection;
 import net.helenus.mapping.value.ColumnValueProvider;
 import net.helenus.mapping.value.ValueProviderMap;
 import net.helenus.support.Fun;
 import net.helenus.support.HelenusMappingException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, SelectOperation<E>> {
 
-	protected Function<Row, E> rowMapper = null;
-	protected final List<HelenusPropertyNode> props = new ArrayList<HelenusPropertyNode>();
+  private static final Logger LOG = LoggerFactory.getLogger(SelectOperation.class);
 
+  protected final List<HelenusPropertyNode> props = new ArrayList<HelenusPropertyNode>();
+  protected Function<Row, E> rowMapper = null;
   protected List<Ordering> ordering = null;
   protected Integer limit = null;
   protected boolean allowFiltering = false;
 
+  protected String alternateTableName = null;
+  protected boolean isCacheable = false;
+  protected boolean implementsEntityType = false;
+
+  @SuppressWarnings("unchecked")
   public SelectOperation(AbstractSessionOperations sessionOperations) {
     super(sessionOperations);
 
-		this.rowMapper = new Function<Row, E>() {
+    this.rowMapper =
+        new Function<Row, E>() {
 
           @Override
           public E apply(Row source) {
@@ -67,7 +80,6 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
 
             return (E) Fun.ArrayTuple.of(arr);
           }
-
         };
   }
 
@@ -75,28 +87,47 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
 
     super(sessionOperations);
 
-		entity.getOrderedProperties().stream().map(p -> new HelenusPropertyNode(p, Optional.empty()))
+    entity
+        .getOrderedProperties()
+        .stream()
+        .map(p -> new HelenusPropertyNode(p, Optional.empty()))
         .forEach(p -> this.props.add(p));
 
+    this.isCacheable = entity.isCacheable();
+    this.implementsEntityType = Entity.class.isAssignableFrom(entity.getMappingInterface());
   }
 
-	public SelectOperation(AbstractSessionOperations sessionOperations, HelenusEntity entity,
+  public SelectOperation(
+      AbstractSessionOperations sessionOperations,
+      HelenusEntity entity,
       Function<Row, E> rowMapper) {
 
     super(sessionOperations);
     this.rowMapper = rowMapper;
 
-		entity.getOrderedProperties().stream().map(p -> new HelenusPropertyNode(p, Optional.empty()))
+    entity
+        .getOrderedProperties()
+        .stream()
+        .map(p -> new HelenusPropertyNode(p, Optional.empty()))
         .forEach(p -> this.props.add(p));
 
+    this.isCacheable = entity.isCacheable();
+    this.implementsEntityType = Entity.class.isAssignableFrom(entity.getMappingInterface());
   }
 
-	public SelectOperation(AbstractSessionOperations sessionOperations, Function<Row, E> rowMapper,
+  public SelectOperation(
+      AbstractSessionOperations sessionOperations,
+      Function<Row, E> rowMapper,
       HelenusPropertyNode... props) {
 
     super(sessionOperations);
+
     this.rowMapper = rowMapper;
     Collections.addAll(this.props, props);
+
+    HelenusEntity entity = props[0].getEntity();
+    this.isCacheable = entity.isCacheable();
+    this.implementsEntityType = Entity.class.isAssignableFrom(entity.getMappingInterface());
   }
 
   public CountOperation count() {
@@ -107,14 +138,30 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
       if (entity == null) {
         entity = prop.getEntity();
       } else if (entity != prop.getEntity()) {
-				throw new HelenusMappingException("you can count records only from a single entity "
-						+ entity.getMappingInterface() + " or " + prop.getEntity().getMappingInterface());
+        throw new HelenusMappingException(
+            "you can count records only from a single entity "
+                + entity.getMappingInterface()
+                + " or "
+                + prop.getEntity().getMappingInterface());
       }
     }
 
     return new CountOperation(sessionOps, entity);
   }
 
+  public <V extends E> SelectOperation<E> from(Class<V> materializedViewClass) {
+    Objects.requireNonNull(materializedViewClass);
+    HelenusEntity entity = Helenus.entity(materializedViewClass);
+    this.alternateTableName = entity.getName().toCql();
+    this.props.clear();
+    entity
+        .getOrderedProperties()
+        .stream()
+        .map(p -> new HelenusPropertyNode(p, Optional.empty()))
+        .forEach(p -> this.props.add(p));
+    return this;
+  }
+
   public SelectFirstOperation<E> single() {
     limit(1);
     return new SelectFirstOperation<E>(this);
@@ -128,11 +175,11 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
 
     this.rowMapper = null;
 
-		return new SelectTransformingOperation<R, E>(this, (r) -> {
-
+    return new SelectTransformingOperation<R, E>(
+        this,
+        (r) -> {
           Map<String, Object> map = new ValueProviderMap(r, sessionOps.getValueProvider(), entity);
           return (R) Helenus.map(entityClass, map);
-
         });
   }
 
@@ -167,23 +214,81 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
   }
 
   @Override
-	public BuiltStatement buildStatement() {
+  public boolean isSessionCacheable() {
+    return isCacheable;
+  }
+
+  @Override
+  public List<Facet> getFacets() {
+    HelenusEntity entity = props.get(0).getEntity();
+    return entity.getFacets();
+  }
+
+  @Override
+  public List<Facet> bindFacetValues() {
+    HelenusEntity entity = props.get(0).getEntity();
+    List<Facet> boundFacets = new ArrayList<>();
+
+    for (Facet facet : entity.getFacets()) {
+      if (facet instanceof UnboundFacet) {
+        UnboundFacet unboundFacet = (UnboundFacet) facet;
+        UnboundFacet.Binder binder = unboundFacet.binder();
+        for (HelenusProperty prop : unboundFacet.getProperties()) {
+          if (filters != null) {
+            Filter filter = filters.get(prop);
+            if (filter != null) {
+              Object[] postulates = filter.postulateValues();
+              for (Object p : postulates) {
+                binder.setValueForProperty(prop, p.toString());
+              }
+            }
+          }
+        }
+        if (binder.isBound()) {
+          boundFacets.add(binder.bind());
+        }
+      } else {
+        boundFacets.add(facet);
+      }
+    }
+    return boundFacets;
+  }
+
+  @Override
+  public BuiltStatement buildStatement(boolean cached) {
 
     HelenusEntity entity = null;
     Selection selection = QueryBuilder.select();
 
     for (HelenusPropertyNode prop : props) {
-			selection = selection.column(prop.getColumnName());
-
-			if (prop.getProperty().caseSensitiveIndex()) {
-				allowFiltering = true;
-			}
+      String columnName = prop.getColumnName();
+      selection = selection.column(columnName);
 
       if (entity == null) {
         entity = prop.getEntity();
       } else if (entity != prop.getEntity()) {
-				throw new HelenusMappingException("you can select columns only from a single entity "
-						+ entity.getMappingInterface() + " or " + prop.getEntity().getMappingInterface());
+        throw new HelenusMappingException(
+            "you can select columns only from a single entity "
+                + entity.getMappingInterface()
+                + " or "
+                + prop.getEntity().getMappingInterface());
+      }
+
+      if (cached && implementsEntityType) {
+        switch (prop.getProperty().getColumnType()) {
+          case PARTITION_KEY:
+          case CLUSTERING_COLUMN:
+            break;
+          default:
+            if (entity.equals(prop.getEntity())) {
+              if (!prop.getProperty().getDataType().isCollectionType()) {
+                columnName = prop.getProperty().getColumnName().toCql(false);
+                selection.ttl(columnName).as('"' + CacheUtil.ttlKey(columnName) + '"');
+                selection.writeTime(columnName).as('"' + CacheUtil.writeTimeKey(columnName) + '"');
+              }
+            }
+            break;
+        }
       }
     }
 
@@ -191,7 +296,8 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
       throw new HelenusMappingException("no entity or table to select data");
     }
 
-		Select select = selection.from(entity.getName().toCql());
+    String tableName = alternateTableName == null ? entity.getName().toCql() : alternateTableName;
+    Select select = selection.from(tableName);
 
     if (ordering != null && !ordering.isEmpty()) {
       select.orderBy(ordering.toArray(new Ordering[ordering.size()]));
@@ -205,13 +311,40 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
 
       Where where = select.where();
 
-			for (Filter<?> filter : filters) {
+      boolean isFirstIndex = true;
+      for (Filter<?> filter : filters.values()) {
         where.and(filter.getClause(sessionOps.getValuePreparer()));
+        HelenusProperty filterProp = filter.getNode().getProperty();
+        HelenusProperty prop =
+            props
+                .stream()
+                .map(HelenusPropertyNode::getProperty)
+                .filter(thisProp -> thisProp.getPropertyName().equals(filterProp.getPropertyName()))
+                .findFirst()
+                .orElse(null);
+        if (allowFiltering == false && prop != null) {
+          switch (prop.getColumnType()) {
+            case PARTITION_KEY:
+              break;
+            case CLUSTERING_COLUMN:
+            default:
+              // When using non-Cassandra-standard 2i types or when using more than one
+              // indexed column or non-indexed columns the query must include ALLOW FILTERING.
+              if (prop.caseSensitiveIndex() == false) {
+                allowFiltering = true;
+              } else if (prop.getIndexName() != null) {
+                allowFiltering |= !isFirstIndex;
+                isFirstIndex = false;
+              } else {
+                allowFiltering = true;
+              }
+          }
+        }
       }
     }
 
     if (ifFilters != null && !ifFilters.isEmpty()) {
-			logger.error("onlyIf conditions " + ifFilters + " would be ignored in the statement " + select);
+      LOG.error("onlyIf conditions " + ifFilters + " would be ignored in the statement " + select);
     }
 
     if (allowFiltering) {
@@ -221,30 +354,18 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
     return select;
   }
 
-	@Override
-	public Optional<E> sync() {
-	    if (true) {
-        } else {
-            return super.sync();
-        }
-	}
-
   @SuppressWarnings("unchecked")
   @Override
   public Stream<E> transform(ResultSet resultSet) {
-
     if (rowMapper != null) {
-
-			return StreamSupport
-					.stream(Spliterators.spliteratorUnknownSize(resultSet.iterator(), Spliterator.ORDERED), false)
+      return StreamSupport.stream(
+              Spliterators.spliteratorUnknownSize(resultSet.iterator(), Spliterator.ORDERED), false)
           .map(rowMapper);
-		}
-
-		else {
-
-			return (Stream<E>) StreamSupport
-					.stream(Spliterators.spliteratorUnknownSize(resultSet.iterator(), Spliterator.ORDERED), false);
-
+    } else {
+      return (Stream<E>)
+          StreamSupport.stream(
+              Spliterators.spliteratorUnknownSize(resultSet.iterator(), Spliterator.ORDERED),
+              false);
     }
   }
 
@@ -254,5 +375,4 @@ public final class SelectOperation<E> extends AbstractFilterStreamOperation<E, S
     }
     return ordering;
   }
-
 }

src/main/java/net/helenus/core/operation/SelectTransformingOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,36 +16,55 @@
  */
 package net.helenus.core.operation;
 
-import java.util.function.Function;
-import java.util.stream.Stream;
-
 import com.datastax.driver.core.ResultSet;
 import com.datastax.driver.core.querybuilder.BuiltStatement;
+import java.util.List;
+import java.util.function.Function;
+import java.util.stream.Stream;
+import net.helenus.core.cache.Facet;
 
 public final class SelectTransformingOperation<R, E>
-		extends
-			AbstractFilterStreamOperation<R, SelectTransformingOperation<R, E>> {
+    extends AbstractFilterStreamOperation<R, SelectTransformingOperation<R, E>> {
 
-	private final SelectOperation<E> src;
+  private final SelectOperation<E> delegate;
   private final Function<E, R> fn;
 
-	public SelectTransformingOperation(SelectOperation<E> src, Function<E, R> fn) {
-		super(src.sessionOps);
+  public SelectTransformingOperation(SelectOperation<E> delegate, Function<E, R> fn) {
+    super(delegate.sessionOps);
 
-		this.src = src;
+    this.delegate = delegate;
     this.fn = fn;
-		this.filters = src.filters;
-		this.ifFilters = src.ifFilters;
+    this.filters = delegate.filters;
+    this.ifFilters = delegate.ifFilters;
   }
 
   @Override
-	public BuiltStatement buildStatement() {
-		return src.buildStatement();
+  public List<Facet> bindFacetValues() {
+    return delegate.bindFacetValues();
+  }
+
+  @Override
+  public List<Facet> getFacets() {
+    return delegate.getFacets();
+  }
+
+  @Override
+  public BuiltStatement buildStatement(boolean cached) {
+    return delegate.buildStatement(cached);
   }
 
   @Override
   public Stream<R> transform(ResultSet resultSet) {
-		return src.transform(resultSet).map(fn);
+    return delegate.transform(resultSet).map(fn);
   }
 
+  @Override
+  public boolean isSessionCacheable() {
+    return delegate.isSessionCacheable();
+  }
+
+  @Override
+  public boolean ignoreCache() {
+    return delegate.ignoreCache();
+  }
 }

src/main/java/net/helenus/core/operation/UpdateOperation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,54 +16,109 @@
  */
 package net.helenus.core.operation;
 
-import java.util.*;
-import java.util.function.Function;
-
 import com.datastax.driver.core.ResultSet;
 import com.datastax.driver.core.querybuilder.Assignment;
 import com.datastax.driver.core.querybuilder.BuiltStatement;
 import com.datastax.driver.core.querybuilder.QueryBuilder;
 import com.datastax.driver.core.querybuilder.Update;
-
-import net.helenus.core.AbstractSessionOperations;
-import net.helenus.core.Filter;
-import net.helenus.core.Getter;
+import java.util.*;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import net.helenus.core.*;
+import net.helenus.core.cache.BoundFacet;
+import net.helenus.core.cache.CacheUtil;
+import net.helenus.core.cache.Facet;
 import net.helenus.core.reflect.HelenusPropertyNode;
+import net.helenus.core.reflect.MapExportable;
 import net.helenus.mapping.HelenusEntity;
 import net.helenus.mapping.HelenusProperty;
 import net.helenus.mapping.MappingUtil;
+import net.helenus.mapping.value.BeanColumnValueProvider;
+import net.helenus.support.HelenusException;
 import net.helenus.support.HelenusMappingException;
 import net.helenus.support.Immutables;
 
-public final class UpdateOperation extends AbstractFilterOperation<ResultSet, UpdateOperation> {
+public final class UpdateOperation<E> extends AbstractFilterOperation<E, UpdateOperation<E>> {
 
+  private final Map<Assignment, BoundFacet> assignments = new HashMap<>();
+  private final AbstractEntityDraft<E> draft;
+  private final Map<String, Object> draftMap;
+  private final Set<String> readSet;
   private HelenusEntity entity = null;
-
-	private final List<Assignment> assignments = new ArrayList<Assignment>();
-
+  private Object pojo;
   private int[] ttl;
   private long[] timestamp;
+  private long writeTime = 0L;
 
   public UpdateOperation(AbstractSessionOperations sessionOperations) {
     super(sessionOperations);
+    this.draft = null;
+    this.draftMap = null;
+    this.readSet = null;
   }
 
-	public UpdateOperation(AbstractSessionOperations sessionOperations, HelenusPropertyNode p, Object v) {
+  public UpdateOperation(
+      AbstractSessionOperations sessionOperations, AbstractEntityDraft<E> draft) {
     super(sessionOperations);
+    this.draft = draft;
+    this.draftMap = draft.toMap();
+    this.readSet = draft.read();
+  }
+
+  public UpdateOperation(AbstractSessionOperations sessionOperations, Object pojo) {
+    super(sessionOperations);
+    this.draft = null;
+    this.draftMap = null;
+
+    if (pojo != null) {
+      this.entity = Helenus.resolve(MappingUtil.getMappingInterface(pojo));
+      if (this.entity != null && entity.isCacheable() && pojo instanceof MapExportable) {
+        this.pojo = pojo;
+        this.readSet = ((MapExportable) pojo).toReadSet();
+      } else {
+        this.readSet = null;
+      }
+    } else {
+      this.readSet = null;
+    }
+  }
+
+  public UpdateOperation(
+      AbstractSessionOperations sessionOperations, HelenusPropertyNode p, Object v) {
+    super(sessionOperations);
+    this.draft = null;
+    this.draftMap = null;
+    this.readSet = null;
 
     Object value = sessionOps.getValuePreparer().prepareColumnValue(v, p.getProperty());
-		assignments.add(QueryBuilder.set(p.getColumnName(), value));
+    assignments.put(QueryBuilder.set(p.getColumnName(), value), new BoundFacet(p.getProperty(), v));
 
     addPropertyNode(p);
   }
 
-	public <V> UpdateOperation set(Getter<V> getter, V v) {
+  public <V> UpdateOperation<E> set(Getter<V> getter, V v) {
     Objects.requireNonNull(getter, "getter is empty");
 
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(getter);
+    HelenusProperty prop = p.getProperty();
 
-		Object value = sessionOps.getValuePreparer().prepareColumnValue(v, p.getProperty());
-		assignments.add(QueryBuilder.set(p.getColumnName(), value));
+    Object value = sessionOps.getValuePreparer().prepareColumnValue(v, prop);
+    assignments.put(QueryBuilder.set(p.getColumnName(), value), new BoundFacet(prop, value));
+
+    if (draft != null) {
+      String key = prop.getPropertyName();
+      if (draft.get(key, value.getClass()) != v) {
+        draft.set(key, v);
+      }
+    }
+
+    if (pojo != null) {
+      if (!BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop).equals(v)) {
+        String key = prop.getPropertyName();
+        ((MapExportable) pojo).put(key, v);
+      }
+    }
 
     addPropertyNode(p);
 
@@ -77,38 +133,60 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
    *
    */
 
-	public <V> UpdateOperation increment(Getter<V> counterGetter) {
+  public <V> UpdateOperation<E> increment(Getter<V> counterGetter) {
     return increment(counterGetter, 1L);
   }
 
-	public <V> UpdateOperation increment(Getter<V> counterGetter, long delta) {
+  public <V> UpdateOperation<E> increment(Getter<V> counterGetter, long delta) {
 
     Objects.requireNonNull(counterGetter, "counterGetter is empty");
 
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(counterGetter);
 
-		assignments.add(QueryBuilder.incr(p.getColumnName(), delta));
-
-		addPropertyNode(p);
-		return this;
-
+    BoundFacet facet = null;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      Long value = (Long) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop);
+      facet = new BoundFacet(prop, value + delta);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      draftMap.put(key, (Long) draftMap.get(key) + delta);
+      facet = new BoundFacet(prop, draftMap.get(key));
     }
 
-	public <V> UpdateOperation decrement(Getter<V> counterGetter) {
+    assignments.put(QueryBuilder.incr(p.getColumnName(), delta), facet);
+
+    addPropertyNode(p);
+
+    return this;
+  }
+
+  public <V> UpdateOperation<E> decrement(Getter<V> counterGetter) {
     return decrement(counterGetter, 1L);
   }
 
-	public <V> UpdateOperation decrement(Getter<V> counterGetter, long delta) {
+  public <V> UpdateOperation<E> decrement(Getter<V> counterGetter, long delta) {
 
     Objects.requireNonNull(counterGetter, "counterGetter is empty");
 
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(counterGetter);
 
-		assignments.add(QueryBuilder.decr(p.getColumnName(), delta));
+    BoundFacet facet = null;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      Long value = (Long) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop);
+      facet = new BoundFacet(prop, value - delta);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      draftMap.put(key, (Long) draftMap.get(key) - delta);
+      facet = new BoundFacet(prop, draftMap.get(key));
+    }
+
+    assignments.put(QueryBuilder.decr(p.getColumnName(), delta), facet);
 
     addPropertyNode(p);
-		return this;
 
+    return this;
   }
 
   /*
@@ -118,7 +196,7 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
    *
    */
 
-	public <V> UpdateOperation prepend(Getter<List<V>> listGetter, V value) {
+  public <V> UpdateOperation<E> prepend(Getter<List<V>> listGetter, V value) {
 
     Objects.requireNonNull(listGetter, "listGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -126,13 +204,31 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(listGetter);
     Object valueObj = prepareSingleListValue(p, value);
 
-		assignments.add(QueryBuilder.prepend(p.getColumnName(), valueObj));
+    final List<V> list;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      list = (List<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      list.add(0, value);
+      facet = new BoundFacet(prop, list);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      list = (List<V>) draftMap.get(key);
+      list.add(0, value);
+      facet = new BoundFacet(prop, list);
+    } else {
+      list = null;
+      facet = null;
+    }
+
+    assignments.put(QueryBuilder.prepend(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation prependAll(Getter<List<V>> listGetter, List<V> value) {
+  public <V> UpdateOperation<E> prependAll(Getter<List<V>> listGetter, List<V> value) {
 
     Objects.requireNonNull(listGetter, "listGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -140,13 +236,31 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(listGetter);
     List valueObj = prepareListValue(p, value);
 
-		assignments.add(QueryBuilder.prependAll(p.getColumnName(), valueObj));
+    final List<V> list;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      list = (List<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      list.addAll(0, value);
+      facet = new BoundFacet(prop, list);
+    } else if (draft != null && value.size() > 0) {
+      String key = p.getProperty().getPropertyName();
+      list = (List<V>) draftMap.get(key);
+      list.addAll(0, value);
+      facet = new BoundFacet(prop, list);
+    } else {
+      list = null;
+      facet = null;
+    }
+
+    assignments.put(QueryBuilder.prependAll(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation setIdx(Getter<List<V>> listGetter, int idx, V value) {
+  public <V> UpdateOperation<E> setIdx(Getter<List<V>> listGetter, int idx, V value) {
 
     Objects.requireNonNull(listGetter, "listGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -154,13 +268,37 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(listGetter);
     Object valueObj = prepareSingleListValue(p, value);
 
-		assignments.add(QueryBuilder.setIdx(p.getColumnName(), idx, valueObj));
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null || draft != null) {
+      final List<V> list;
+      if (pojo != null) {
+        list = (List<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      } else {
+        String key = prop.getPropertyName();
+        list = (List<V>) draftMap.get(key);
+      }
+      if (idx < 0) {
+        list.add(0, value);
+      } else if (idx > list.size()) {
+        list.add(list.size(), value);
+      } else {
+        list.add(idx, value);
+      }
+      list.add(0, value);
+      facet = new BoundFacet(prop, list);
+    } else {
+      facet = null;
+    }
+
+    assignments.put(QueryBuilder.setIdx(p.getColumnName(), idx, valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation append(Getter<List<V>> listGetter, V value) {
+  public <V> UpdateOperation<E> append(Getter<List<V>> listGetter, V value) {
 
     Objects.requireNonNull(listGetter, "listGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -168,13 +306,30 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(listGetter);
     Object valueObj = prepareSingleListValue(p, value);
 
-		assignments.add(QueryBuilder.append(p.getColumnName(), valueObj));
+    final List<V> list;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      list = (List<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      list.add(value);
+      facet = new BoundFacet(prop, list);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      list = (List<V>) draftMap.get(key);
+      list.add(value);
+      facet = new BoundFacet(prop, list);
+    } else {
+      list = null;
+      facet = null;
+    }
+    assignments.put(QueryBuilder.append(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation appendAll(Getter<List<V>> listGetter, List<V> value) {
+  public <V> UpdateOperation<E> appendAll(Getter<List<V>> listGetter, List<V> value) {
 
     Objects.requireNonNull(listGetter, "listGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -182,13 +337,30 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(listGetter);
     List valueObj = prepareListValue(p, value);
 
-		assignments.add(QueryBuilder.appendAll(p.getColumnName(), valueObj));
+    final List<V> list;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      list = (List<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      list.addAll(value);
+      facet = new BoundFacet(prop, list);
+    } else if (draft != null && value.size() > 0) {
+      String key = prop.getPropertyName();
+      list = (List<V>) draftMap.get(key);
+      list.addAll(value);
+      facet = new BoundFacet(prop, list);
+    } else {
+      list = null;
+      facet = null;
+    }
+    assignments.put(QueryBuilder.appendAll(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation discard(Getter<List<V>> listGetter, V value) {
+  public <V> UpdateOperation<E> discard(Getter<List<V>> listGetter, V value) {
 
     Objects.requireNonNull(listGetter, "listGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -196,13 +368,30 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(listGetter);
     Object valueObj = prepareSingleListValue(p, value);
 
-		assignments.add(QueryBuilder.discard(p.getColumnName(), valueObj));
+    final List<V> list;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      list = (List<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      list.remove(value);
+      facet = new BoundFacet(prop, list);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      list = (List<V>) draftMap.get(key);
+      list.remove(value);
+      facet = new BoundFacet(prop, list);
+    } else {
+      list = null;
+      facet = null;
+    }
+    assignments.put(QueryBuilder.discard(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation discardAll(Getter<List<V>> listGetter, List<V> value) {
+  public <V> UpdateOperation<E> discardAll(Getter<List<V>> listGetter, List<V> value) {
 
     Objects.requireNonNull(listGetter, "listGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -210,9 +399,26 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(listGetter);
     List valueObj = prepareListValue(p, value);
 
-		assignments.add(QueryBuilder.discardAll(p.getColumnName(), valueObj));
+    final List<V> list;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      list = (List<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      list.removeAll(value);
+      facet = new BoundFacet(prop, list);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      list = (List<V>) draftMap.get(key);
+      list.removeAll(value);
+      facet = new BoundFacet(prop, list);
+    } else {
+      list = null;
+      facet = null;
+    }
+    assignments.put(QueryBuilder.discardAll(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
@@ -221,7 +427,8 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
 
     Object valueObj = value;
 
-		Optional<Function<Object, Object>> converter = prop.getWriteConverter(sessionOps.getSessionRepository());
+    Optional<Function<Object, Object>> converter =
+        prop.getWriteConverter(sessionOps.getSessionRepository());
     if (converter.isPresent()) {
       List convertedList = (List) converter.get().apply(Immutables.listOf(value));
       valueObj = convertedList.get(0);
@@ -236,7 +443,8 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
 
     List valueObj = value;
 
-		Optional<Function<Object, Object>> converter = prop.getWriteConverter(sessionOps.getSessionRepository());
+    Optional<Function<Object, Object>> converter =
+        prop.getWriteConverter(sessionOps.getSessionRepository());
     if (converter.isPresent()) {
       valueObj = (List) converter.get().apply(value);
     }
@@ -252,7 +460,7 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
    *
    */
 
-	public <V> UpdateOperation add(Getter<Set<V>> setGetter, V value) {
+  public <V> UpdateOperation<E> add(Getter<Set<V>> setGetter, V value) {
 
     Objects.requireNonNull(setGetter, "setGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -260,13 +468,30 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(setGetter);
     Object valueObj = prepareSingleSetValue(p, value);
 
-		assignments.add(QueryBuilder.add(p.getColumnName(), valueObj));
+    final Set<V> set;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      set = (Set<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      set.add(value);
+      facet = new BoundFacet(prop, set);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      set = (Set<V>) draftMap.get(key);
+      set.add(value);
+      facet = new BoundFacet(prop, set);
+    } else {
+      set = null;
+      facet = null;
+    }
+    assignments.put(QueryBuilder.add(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation addAll(Getter<Set<V>> setGetter, Set<V> value) {
+  public <V> UpdateOperation<E> addAll(Getter<Set<V>> setGetter, Set<V> value) {
 
     Objects.requireNonNull(setGetter, "setGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -274,13 +499,30 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(setGetter);
     Set valueObj = prepareSetValue(p, value);
 
-		assignments.add(QueryBuilder.addAll(p.getColumnName(), valueObj));
+    final Set<V> set;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      set = (Set<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      set.addAll(value);
+      facet = new BoundFacet(prop, set);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      set = (Set<V>) draftMap.get(key);
+      set.addAll(value);
+      facet = new BoundFacet(prop, set);
+    } else {
+      set = null;
+      facet = null;
+    }
+    assignments.put(QueryBuilder.addAll(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation remove(Getter<Set<V>> setGetter, V value) {
+  public <V> UpdateOperation<E> remove(Getter<Set<V>> setGetter, V value) {
 
     Objects.requireNonNull(setGetter, "setGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -288,13 +530,30 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(setGetter);
     Object valueObj = prepareSingleSetValue(p, value);
 
-		assignments.add(QueryBuilder.remove(p.getColumnName(), valueObj));
+    final Set<V> set;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      set = (Set<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      set.remove(value);
+      facet = new BoundFacet(prop, set);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      set = (Set<V>) draftMap.get(key);
+      set.remove(value);
+      facet = new BoundFacet(prop, set);
+    } else {
+      set = null;
+      facet = null;
+    }
+    assignments.put(QueryBuilder.remove(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <V> UpdateOperation removeAll(Getter<Set<V>> setGetter, Set<V> value) {
+  public <V> UpdateOperation<E> removeAll(Getter<Set<V>> setGetter, Set<V> value) {
 
     Objects.requireNonNull(setGetter, "setGetter is empty");
     Objects.requireNonNull(value, "value is empty");
@@ -302,9 +561,26 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(setGetter);
     Set valueObj = prepareSetValue(p, value);
 
-		assignments.add(QueryBuilder.removeAll(p.getColumnName(), valueObj));
+    final Set<V> set;
+    final BoundFacet facet;
+    HelenusProperty prop = p.getProperty();
+    if (pojo != null) {
+      set = (Set<V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      set.removeAll(value);
+      facet = new BoundFacet(prop, set);
+    } else if (draft != null) {
+      String key = prop.getPropertyName();
+      set = (Set<V>) draftMap.get(key);
+      set.removeAll(value);
+      facet = new BoundFacet(prop, set);
+    } else {
+      set = null;
+      facet = null;
+    }
+    assignments.put(QueryBuilder.removeAll(p.getColumnName(), valueObj), facet);
 
     addPropertyNode(p);
+
     return this;
   }
 
@@ -313,7 +589,8 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusProperty prop = p.getProperty();
     Object valueObj = value;
 
-		Optional<Function<Object, Object>> converter = prop.getWriteConverter(sessionOps.getSessionRepository());
+    Optional<Function<Object, Object>> converter =
+        prop.getWriteConverter(sessionOps.getSessionRepository());
     if (converter.isPresent()) {
       Set convertedSet = (Set) converter.get().apply(Immutables.setOf(value));
       valueObj = convertedSet.iterator().next();
@@ -327,7 +604,8 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusProperty prop = p.getProperty();
     Set valueObj = value;
 
-		Optional<Function<Object, Object>> converter = prop.getWriteConverter(sessionOps.getSessionRepository());
+    Optional<Function<Object, Object>> converter =
+        prop.getWriteConverter(sessionOps.getSessionRepository());
     if (converter.isPresent()) {
       valueObj = (Set) converter.get().apply(value);
     }
@@ -343,7 +621,7 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
    *
    */
 
-	public <K, V> UpdateOperation put(Getter<Map<K, V>> mapGetter, K key, V value) {
+  public <K, V> UpdateOperation<E> put(Getter<Map<K, V>> mapGetter, K key, V value) {
 
     Objects.requireNonNull(mapGetter, "mapGetter is empty");
     Objects.requireNonNull(key, "key is empty");
@@ -351,22 +629,39 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(mapGetter);
     HelenusProperty prop = p.getProperty();
 
-		Optional<Function<Object, Object>> converter = prop.getWriteConverter(sessionOps.getSessionRepository());
+    final Map<K, V> map;
+    final BoundFacet facet;
+    if (pojo != null) {
+      map = (Map<K, V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      map.put(key, value);
+      facet = new BoundFacet(prop, map);
+    } else if (draft != null) {
+      map = (Map<K, V>) draftMap.get(prop.getPropertyName());
+      map.put(key, value);
+      facet = new BoundFacet(prop, map);
+    } else {
+      map = null;
+      facet = null;
+    }
+
+    Optional<Function<Object, Object>> converter =
+        prop.getWriteConverter(sessionOps.getSessionRepository());
     if (converter.isPresent()) {
-			Map<Object, Object> convertedMap = (Map<Object, Object>) converter.get()
-					.apply(Immutables.mapOf(key, value));
+      Map<Object, Object> convertedMap =
+          (Map<Object, Object>) converter.get().apply(Immutables.mapOf(key, value));
       for (Map.Entry<Object, Object> e : convertedMap.entrySet()) {
-				assignments.add(QueryBuilder.put(p.getColumnName(), e.getKey(), e.getValue()));
+        assignments.put(QueryBuilder.put(p.getColumnName(), e.getKey(), e.getValue()), facet);
       }
     } else {
-			assignments.add(QueryBuilder.put(p.getColumnName(), key, value));
+      assignments.put(QueryBuilder.put(p.getColumnName(), key, value), facet);
     }
 
     addPropertyNode(p);
+
     return this;
   }
 
-	public <K, V> UpdateOperation putAll(Getter<Map<K, V>> mapGetter, Map<K, V> map) {
+  public <K, V> UpdateOperation<E> putAll(Getter<Map<K, V>> mapGetter, Map<K, V> map) {
 
     Objects.requireNonNull(mapGetter, "mapGetter is empty");
     Objects.requireNonNull(map, "map is empty");
@@ -374,20 +669,37 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     HelenusPropertyNode p = MappingUtil.resolveMappingProperty(mapGetter);
     HelenusProperty prop = p.getProperty();
 
-		Optional<Function<Object, Object>> converter = prop.getWriteConverter(sessionOps.getSessionRepository());
+    final Map<K, V> newMap;
+    final BoundFacet facet;
+    if (pojo != null) {
+      newMap = (Map<K, V>) BeanColumnValueProvider.INSTANCE.getColumnValue(pojo, -1, prop, false);
+      newMap.putAll(map);
+      facet = new BoundFacet(prop, newMap);
+    } else if (draft != null) {
+      newMap = (Map<K, V>) draftMap.get(prop.getPropertyName());
+      newMap.putAll(map);
+      facet = new BoundFacet(prop, newMap);
+    } else {
+      newMap = null;
+      facet = null;
+    }
+
+    Optional<Function<Object, Object>> converter =
+        prop.getWriteConverter(sessionOps.getSessionRepository());
     if (converter.isPresent()) {
       Map convertedMap = (Map) converter.get().apply(map);
-			assignments.add(QueryBuilder.putAll(p.getColumnName(), convertedMap));
+      assignments.put(QueryBuilder.putAll(p.getColumnName(), convertedMap), facet);
     } else {
-			assignments.add(QueryBuilder.putAll(p.getColumnName(), map));
+      assignments.put(QueryBuilder.putAll(p.getColumnName(), map), facet);
     }
 
     addPropertyNode(p);
+
     return this;
   }
 
   @Override
-	public BuiltStatement buildStatement() {
+  public BuiltStatement buildStatement(boolean cached) {
 
     if (entity == null) {
       throw new HelenusMappingException("empty update operation");
@@ -395,7 +707,7 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
 
     Update update = QueryBuilder.update(entity.getName().toCql());
 
-		for (Assignment assignment : assignments) {
+    for (Assignment assignment : assignments.keySet()) {
       update.with(assignment);
     }
 
@@ -416,6 +728,7 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     if (this.ttl != null) {
       update.using(QueryBuilder.ttl(this.ttl[0]));
     }
+
     if (this.timestamp != null) {
       update.using(QueryBuilder.timestamp(this.timestamp[0]));
     }
@@ -424,17 +737,25 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
   }
 
   @Override
-	public ResultSet transform(ResultSet resultSet) {
-		return resultSet;
+  public E transform(ResultSet resultSet) {
+    if ((ifFilters != null && !ifFilters.isEmpty()) && (resultSet.wasApplied() == false)) {
+      throw new HelenusException("Statement was not applied due to consistency constraints");
     }
 
-	public UpdateOperation usingTtl(int ttl) {
+    if (draft != null) {
+      return Helenus.map(draft.getEntityClass(), draft.toMap(draftMap));
+    } else {
+      return (E) resultSet;
+    }
+  }
+
+  public UpdateOperation<E> usingTtl(int ttl) {
     this.ttl = new int[1];
     this.ttl[0] = ttl;
     return this;
   }
 
-	public UpdateOperation usingTimestamp(long timestamp) {
+  public UpdateOperation<E> usingTimestamp(long timestamp) {
     this.timestamp = new long[1];
     this.timestamp[0] = timestamp;
     return this;
@@ -444,8 +765,140 @@ public final class UpdateOperation extends AbstractFilterOperation<ResultSet, Up
     if (entity == null) {
       entity = p.getEntity();
     } else if (entity != p.getEntity()) {
-			throw new HelenusMappingException("you can update columns only in single entity "
-					+ entity.getMappingInterface() + " or " + p.getEntity().getMappingInterface());
+      throw new HelenusMappingException(
+          "you can update columns only in single entity "
+              + entity.getMappingInterface()
+              + " or "
+              + p.getEntity().getMappingInterface());
+    }
+  }
+
+  private void adjustTtlAndWriteTime(MapExportable pojo) {
+    if (ttl != null || writeTime != 0L) {
+      List<String> names = new ArrayList<String>(assignments.size());
+      for (BoundFacet facet : assignments.values()) {
+        for (HelenusProperty prop : facet.getProperties()) {
+          names.add(prop.getColumnName().toCql(false));
+        }
+      }
+
+      if (names.size() > 0) {
+        if (ttl != null) {
+          names.forEach(name -> pojo.put(CacheUtil.ttlKey(name), ttl));
+        }
+        if (writeTime != 0L) {
+          names.forEach(name -> pojo.put(CacheUtil.writeTimeKey(name), writeTime));
+        }
+      }
+    }
+  }
+
+  @Override
+  protected boolean isIdempotentOperation() {
+    return assignments
+            .values()
+            .stream()
+            .allMatch(
+                facet -> {
+                  if (facet != null) {
+                    Set<HelenusProperty> props = facet.getProperties();
+                    if (props != null && props.size() > 0) {
+                      return props.stream().allMatch(prop -> prop.isIdempotent());
+                    } else {
+                      return true;
+                    }
+                  } else {
+                    // In this case our UPDATE statement made mutations via the List, Set, Map methods only.
+                    return false;
+                  }
+                })
+        || super.isIdempotentOperation();
+  }
+
+  @Override
+  public E sync() throws TimeoutException {
+    E result = super.sync();
+    if (result != null && entity.isCacheable()) {
+      if (draft != null) {
+        adjustTtlAndWriteTime(draft);
+        adjustTtlAndWriteTime((MapExportable) result);
+        sessionOps.updateCache(result, bindFacetValues());
+      } else if (pojo != null) {
+        adjustTtlAndWriteTime((MapExportable) pojo);
+        sessionOps.updateCache(pojo, bindFacetValues());
+      } else {
+        sessionOps.cacheEvict(bindFacetValues());
+      }
+    }
+    return result;
+  }
+
+  @Override
+  public E sync(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) {
+      return sync();
+    }
+    E result = super.sync(uow);
+    if (result != null) {
+      if (draft != null) {
+        adjustTtlAndWriteTime(draft);
+      }
+      if (entity != null && MapExportable.class.isAssignableFrom(entity.getMappingInterface())) {
+        adjustTtlAndWriteTime((MapExportable) result);
+        cacheUpdate(uow, result, bindFacetValues());
+      } else if (pojo != null) {
+        adjustTtlAndWriteTime((MapExportable) pojo);
+        cacheUpdate(uow, (E) pojo, bindFacetValues());
+        return (E) pojo;
+      }
+    }
+    return result;
+  }
+
+  public E batch(UnitOfWork uow) throws TimeoutException {
+    if (uow == null) {
+      throw new HelenusException("UnitOfWork cannot be null when batching operations.");
+    }
+
+    final E result;
+    if (draft != null) {
+      result = draft.build();
+      adjustTtlAndWriteTime(draft);
+    } else if (pojo != null) {
+      result = (E) pojo;
+      adjustTtlAndWriteTime((MapExportable) pojo);
+    } else {
+      result = null;
+    }
+
+    if (result != null) {
+      cacheUpdate(uow, result, bindFacetValues());
+      uow.batch(this);
+      return result;
+    }
+
+    return sync(uow);
+  }
+
+  @Override
+  public List<Facet> bindFacetValues() {
+    List<Facet> facets = bindFacetValues(entity.getFacets());
+    facets.addAll(
+        assignments
+            .values()
+            .stream()
+            .distinct()
+            .filter(o -> o != null)
+            .collect(Collectors.toList()));
+    return facets;
+  }
+
+  @Override
+  public List<Facet> getFacets() {
+    if (entity != null) {
+      return entity.getFacets();
+    } else {
+      return new ArrayList<Facet>();
     }
   }
 }

src/main/java/net/helenus/core/reflect/DefaultPrimitiveTypes.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -19,14 +20,17 @@ import java.util.HashMap;
 import java.util.Map;
 
 public enum DefaultPrimitiveTypes {
+  BOOLEAN(boolean.class, false),
+  BYTE(byte.class, (byte) 0x0),
+  CHAR(char.class, (char) 0x0),
+  SHORT(short.class, (short) 0),
+  INT(int.class, 0),
+  LONG(long.class, 0L),
+  FLOAT(float.class, 0.0f),
+  DOUBLE(double.class, 0.0);
 
-	BOOLEAN(boolean.class, false), BYTE(byte.class, (byte) 0x0), CHAR(char.class, (char) 0x0), SHORT(short.class,
-			(short) 0), INT(int.class, 0), LONG(long.class, 0L), FLOAT(float.class, 0.0f), DOUBLE(double.class, 0.0);
-
-	private final Class<?> primitiveClass;
-	private final Object defaultValue;
-
-	private final static Map<Class<?>, DefaultPrimitiveTypes> map = new HashMap<Class<?>, DefaultPrimitiveTypes>();
+  private static final Map<Class<?>, DefaultPrimitiveTypes> map =
+      new HashMap<Class<?>, DefaultPrimitiveTypes>();
 
   static {
     for (DefaultPrimitiveTypes type : DefaultPrimitiveTypes.values()) {
@@ -34,6 +38,9 @@ public enum DefaultPrimitiveTypes {
     }
   }
 
+  private final Class<?> primitiveClass;
+  private final Object defaultValue;
+
   private DefaultPrimitiveTypes(Class<?> primitiveClass, Object defaultValue) {
     this.primitiveClass = primitiveClass;
     this.defaultValue = defaultValue;
@@ -50,5 +57,4 @@ public enum DefaultPrimitiveTypes {
   public Object getDefaultValue() {
     return defaultValue;
   }
-
 }

src/main/java/net/helenus/core/reflect/Drafted.java

@@ -0,0 +1,28 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+package net.helenus.core.reflect;
+
+import java.util.Set;
+
+public interface Drafted<T> extends MapExportable {
+
+  Set<String> mutated();
+
+  T build();
+
+  Set<String> read();
+}

src/main/java/net/helenus/core/reflect/DslExportable.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,15 +16,18 @@
  */
 package net.helenus.core.reflect;
 
+import com.datastax.driver.core.Metadata;
 import net.helenus.mapping.HelenusEntity;
 
 public interface DslExportable {
 
-	public static final String GET_ENTITY_METHOD = "getHelenusMappingEntity";
-	public static final String GET_PARENT_METHOD = "getParentDslHelenusPropertyNode";
+  String GET_ENTITY_METHOD = "getHelenusMappingEntity";
+  String GET_PARENT_METHOD = "getParentDslHelenusPropertyNode";
+  String SET_METADATA_METHOD = "setCassandraMetadataForHelenusSession";
 
   HelenusEntity getHelenusMappingEntity();
 
   HelenusPropertyNode getParentDslHelenusPropertyNode();
 
+  void setCassandraMetadataForHelenusSession(Metadata metadata);
 }

src/main/java/net/helenus/core/reflect/DslInvocationHandler.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,18 +16,14 @@
  */
 package net.helenus.core.reflect;
 
-import java.lang.invoke.MethodHandle;
-import java.lang.invoke.MethodHandles;
+import com.datastax.driver.core.*;
 import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Objects;
 import java.util.Optional;
-
-import com.datastax.driver.core.*;
-
 import net.helenus.core.Helenus;
 import net.helenus.mapping.HelenusEntity;
 import net.helenus.mapping.HelenusMappingEntity;
@@ -39,21 +36,39 @@ import net.helenus.support.HelenusException;
 
 public class DslInvocationHandler<E> implements InvocationHandler {
 
-	private final HelenusEntity entity;
+  private final Class<E> iface;
+  private final ClassLoader classLoader;
   private final Optional<HelenusPropertyNode> parent;
-
   private final Map<Method, HelenusProperty> map = new HashMap<Method, HelenusProperty>();
-
   private final Map<Method, Object> udtMap = new HashMap<Method, Object>();
   private final Map<Method, Object> tupleMap = new HashMap<Method, Object>();
+  private HelenusEntity entity = null;
+  private Metadata metadata = null;
 
-	public DslInvocationHandler(Class<E> iface, ClassLoader classLoader, Optional<HelenusPropertyNode> parent, Metadata metadata) {
+  public DslInvocationHandler(
+      Class<E> iface,
+      ClassLoader classLoader,
+      Optional<HelenusPropertyNode> parent,
+      Metadata metadata) {
 
-		this.entity = new HelenusMappingEntity(iface, metadata);
+    this.metadata = metadata;
     this.parent = parent;
+    this.iface = iface;
+    this.classLoader = classLoader;
+  }
 
-		if (this.entity != null) {
-            for (HelenusProperty prop : entity.getOrderedProperties()) {
+  public void setCassandraMetadataForHelenusSession(Metadata metadata) {
+    if (metadata != null) {
+      this.metadata = metadata;
+      entity = init(metadata);
+    }
+  }
+
+  private HelenusEntity init(Metadata metadata) {
+    HelenusEntity entity = new HelenusMappingEntity(iface, metadata);
+    Collection<HelenusProperty> properties = entity.getOrderedProperties();
+    if (properties != null) {
+      for (HelenusProperty prop : properties) {
 
         map.put(prop.getGetterMethod(), prop);
 
@@ -62,8 +77,12 @@ public class DslInvocationHandler<E> implements InvocationHandler {
 
         if (type instanceof UDTDataType && !UDTValue.class.isAssignableFrom(javaType)) {
 
-                    Object childDsl = Helenus.dsl(javaType, classLoader,
-                            Optional.of(new HelenusPropertyNode(prop, parent)), metadata);
+          Object childDsl =
+              Helenus.dsl(
+                  javaType,
+                  classLoader,
+                  Optional.of(new HelenusPropertyNode(prop, parent)),
+                  metadata);
 
           udtMap.put(prop.getGetterMethod(), childDsl);
         }
@@ -71,23 +90,29 @@ public class DslInvocationHandler<E> implements InvocationHandler {
         if (type instanceof DTDataType) {
           DTDataType dataType = (DTDataType) type;
 
-                    if (dataType.getDataType() instanceof TupleType && !TupleValue.class.isAssignableFrom(javaType)) {
+          if (dataType.getDataType() instanceof TupleType
+              && !TupleValue.class.isAssignableFrom(javaType)) {
 
-                        Object childDsl = Helenus.dsl(javaType, classLoader,
-                                Optional.of(new HelenusPropertyNode(prop, parent)), metadata);
+            Object childDsl =
+                Helenus.dsl(
+                    javaType,
+                    classLoader,
+                    Optional.of(new HelenusPropertyNode(prop, parent)),
+                    metadata);
 
             tupleMap.put(prop.getGetterMethod(), childDsl);
-
+          }
+        }
       }
     }
 
-            }
-        }
+    return entity;
   }
 
   @Override
   public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
 
+    HelenusEntity entity = this.entity;
     String methodName = method.getName();
 
     if ("equals".equals(methodName) && method.getParameterCount() == 1) {
@@ -101,6 +126,15 @@ public class DslInvocationHandler<E> implements InvocationHandler {
       return false;
     }
 
+    if (DslExportable.SET_METADATA_METHOD.equals(methodName)
+        && args.length == 1
+        && args[0] instanceof Metadata) {
+      if (metadata == null) {
+        this.setCassandraMetadataForHelenusSession((Metadata) args[0]);
+      }
+      return null;
+    }
+
     if (method.getParameterCount() != 0 || method.getReturnType() == void.class) {
       throw new HelenusException("invalid getter method " + method);
     }
@@ -109,6 +143,14 @@ public class DslInvocationHandler<E> implements InvocationHandler {
       return hashCode();
     }
 
+    if (DslExportable.GET_PARENT_METHOD.equals(methodName)) {
+      return parent.get();
+    }
+
+    if (entity == null) {
+      entity = init(metadata);
+    }
+
     if ("toString".equals(methodName)) {
       return entity.toString();
     }
@@ -117,11 +159,6 @@ public class DslInvocationHandler<E> implements InvocationHandler {
       return entity;
     }
 
-		if (DslExportable.GET_PARENT_METHOD.equals(methodName)) {
-			return parent.get();
-		}
-
-
     HelenusProperty prop = map.get(method);
     if (prop == null) {
       prop = entity.getProperty(methodName);
@@ -138,7 +175,6 @@ public class DslInvocationHandler<E> implements InvocationHandler {
         if (childDsl != null) {
           return childDsl;
         }
-
       }
 
       if (type instanceof DTDataType) {
@@ -146,9 +182,7 @@ public class DslInvocationHandler<E> implements InvocationHandler {
         DataType dt = dataType.getDataType();
 
         switch (dt.getName()) {
-
-					case TUPLE :
-
+          case TUPLE:
             Object childDsl = tupleMap.get(method);
 
             if (childDsl != null) {
@@ -157,20 +191,18 @@ public class DslInvocationHandler<E> implements InvocationHandler {
 
             break;
 
-					case SET :
+          case SET:
             return new SetDsl(new HelenusPropertyNode(prop, parent));
 
-					case LIST :
+          case LIST:
             return new ListDsl(new HelenusPropertyNode(prop, parent));
 
-					case MAP :
+          case MAP:
             return new MapDsl(new HelenusPropertyNode(prop, parent));
 
-					default :
+          default:
             break;
-
         }
-
       }
 
       throw new DslPropertyException(new HelenusPropertyNode(prop, parent));
@@ -178,5 +210,4 @@ public class DslInvocationHandler<E> implements InvocationHandler {
 
     throw new HelenusException("invalid method call " + method);
   }
-
 }

src/main/java/net/helenus/core/reflect/Entity.java

@@ -0,0 +1,73 @@
+/*
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+package net.helenus.core.reflect;
+
+import net.helenus.core.Getter;
+
+public interface Entity {
+  String WRITTEN_AT_METHOD = "writtenAt";
+  String TTL_OF_METHOD = "ttlOf";
+  String TOKEN_OF_METHOD = "tokenOf";
+
+    /**
+     * The write time for the property in question referenced by the getter.
+     *
+     * @param getter the property getter
+     * @return the timestamp associated with the property identified by the getter
+     */
+  default Long writtenAt(Getter getter) {
+    return 0L;
+  }
+
+    /**
+     * The write time for the property in question referenced by the property name.
+     *
+     * @param prop the name of a property in this entity
+     * @return the timestamp associated with the property identified by the property name if it exists
+     */
+  default Long writtenAt(String prop) {
+    return 0L;
+  };
+
+    /**
+     * The time-to-live for the property in question referenced by the getter.
+     *
+     * @param getter the property getter
+     * @return the time-to-live in seconds associated with the property identified by the getter
+     */
+  default Integer ttlOf(Getter getter) {
+    return 0;
+  };
+
+    /**
+     * The time-to-live for the property in question referenced by the property name.
+     *
+     * @param prop the name of a property in this entity
+     * @return the time-to-live in seconds associated with the property identified by the property name if it exists
+     */
+  default Integer ttlOf(String prop) {
+    return 0;
+  };
+
+    /**
+     * The token (partition identifier) for this entity which can change over time if
+     * the cluster grows or shrinks but should be stable otherwise.
+     *
+     * @return the token for the entity
+     */
+  default Long tokenOf() { return 0L; }
+}

src/main/java/net/helenus/core/reflect/HelenusNamedProperty.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -19,9 +20,7 @@ import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.util.Optional;
 import java.util.function.Function;
-
 import javax.validation.ConstraintValidator;
-
 import net.helenus.core.SessionRepository;
 import net.helenus.mapping.*;
 import net.helenus.mapping.type.AbstractDataType;
@@ -61,7 +60,14 @@ public final class HelenusNamedProperty implements HelenusProperty {
   }
 
   @Override
-	public boolean caseSensitiveIndex() { return false; }
+  public boolean caseSensitiveIndex() {
+    return false;
+  }
+
+  @Override
+  public boolean isIdempotent() {
+    return false;
+  }
 
   @Override
   public Class<?> getJavaType() {

src/main/java/net/helenus/core/reflect/HelenusPropertyNode.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -17,7 +18,6 @@ package net.helenus.core.reflect;
 
 import java.util.*;
 import java.util.stream.Collectors;
-
 import net.helenus.mapping.HelenusEntity;
 import net.helenus.mapping.HelenusProperty;
 
@@ -102,7 +102,5 @@ public final class HelenusPropertyNode implements Iterable<HelenusProperty> {
       next = node.next;
       return node.prop;
     }
-
   }
-
 }

src/main/java/net/helenus/core/reflect/ListDsl.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -16,7 +17,6 @@
 package net.helenus.core.reflect;
 
 import java.util.*;
-
 import net.helenus.mapping.HelenusProperty;
 import net.helenus.support.DslPropertyException;
 import net.helenus.support.HelenusMappingException;

src/main/java/net/helenus/core/reflect/MapDsl.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -19,7 +20,6 @@ import java.util.Collection;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
-
 import net.helenus.mapping.HelenusProperty;
 import net.helenus.support.DslPropertyException;
 import net.helenus.support.HelenusMappingException;
@@ -114,5 +114,4 @@ public final class MapDsl<K, V> implements Map<K, V> {
   public String toString() {
     return "MapDsl";
   }
-
 }

src/main/java/net/helenus/core/reflect/MapExportable.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -16,11 +17,25 @@
 package net.helenus.core.reflect;
 
 import java.util.Map;
+import java.util.Set;
+import net.helenus.core.Getter;
 
 public interface MapExportable {
-
-	public static final String TO_MAP_METHOD = "toMap";
+  String TO_MAP_METHOD = "toMap";
+  String TO_READ_SET_METHOD = "toReadSet";
+  String PUT_METHOD = "put";
 
   Map<String, Object> toMap();
 
+  default Map<String, Object> toMap(boolean mutable) {
+    return null;
+  }
+
+  default Set<String> toReadSet() {
+    return null;
+  }
+
+  default void put(String key, Object value) {}
+
+  default <T> void put(Getter<T> getter, T value) {}
 }

src/main/java/net/helenus/core/reflect/MapperInvocationHandler.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,20 +16,32 @@
  */
 package net.helenus.core.reflect;
 
-import java.lang.invoke.MethodHandle;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import java.io.InvalidObjectException;
+import java.io.ObjectInputStream;
+import java.io.ObjectStreamException;
+import java.io.Serializable;
 import java.lang.invoke.MethodHandles;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;
-import java.util.Collections;
-import java.util.Map;
-
+import java.util.*;
+import net.helenus.core.Getter;
+import net.helenus.core.Helenus;
+import net.helenus.core.cache.CacheUtil;
+import net.helenus.mapping.MappingUtil;
+import net.helenus.mapping.annotation.Transient;
+import net.helenus.mapping.value.ValueProviderMap;
 import net.helenus.support.HelenusException;
 
-public class MapperInvocationHandler<E> implements InvocationHandler {
+public class MapperInvocationHandler<E> implements InvocationHandler, Serializable {
+  private static final long serialVersionUID = -7044209982830584984L;
 
-	private final Map<String, Object> src;
+  private Map<String, Object> src;
+  private final Set<String> read = new HashSet<String>();
   private final Class<E> iface;
 
   public MapperInvocationHandler(Class<E> iface, Map<String, Object> src) {
@@ -36,27 +49,46 @@ public class MapperInvocationHandler<E> implements InvocationHandler {
     this.iface = iface;
   }
 
-	@Override
-	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
-
-        if (method.isDefault()) {
-            // NOTE: This is reflection magic to invoke (non-recursively) a default method implemented on an interface
-            // that we've proxied (in ReflectionDslInstantiator).  I found the answer in this article.
+  private Object invokeDefault(Object proxy, Method method, Object[] args) throws Throwable {
+    // NOTE: This is reflection magic to invoke (non-recursively) a default method
+    // implemented on an interface
+    // that we've proxied (in ReflectionDslInstantiator). I found the answer in this
+    // article.
     // https://zeroturnaround.com/rebellabs/recognize-and-conquer-java-proxies-default-methods-and-method-handles/
 
     // First, we need an instance of a private inner-class found in MethodHandles.
-            Constructor<MethodHandles.Lookup> constructor = MethodHandles.Lookup.class.getDeclaredConstructor(Class.class, int.class);
+    Constructor<MethodHandles.Lookup> constructor =
+        MethodHandles.Lookup.class.getDeclaredConstructor(Class.class, int.class);
     constructor.setAccessible(true);
 
-            // Now we need to lookup and invoke special the default method on the interface class.
+    // Now we need to lookup and invoke special the default method on the interface
+    // class.
     final Class<?> declaringClass = method.getDeclaringClass();
-            Object result = constructor.newInstance(declaringClass, MethodHandles.Lookup.PRIVATE)
+    Object result =
+        constructor
+            .newInstance(declaringClass, MethodHandles.Lookup.PRIVATE)
             .unreflectSpecial(method, declaringClass)
             .bindTo(proxy)
             .invokeWithArguments(args);
     return result;
   }
 
+  private Object writeReplace() {
+    return new SerializationProxy<E>(this);
+  }
+
+  private void readObject(ObjectInputStream stream) throws InvalidObjectException {
+    throw new InvalidObjectException("Proxy required.");
+  }
+
+  @Override
+  public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+
+    // Transient, default methods should simply be invoked as-is.
+    if (method.isDefault() && method.getDeclaredAnnotation(Transient.class) != null) {
+      return invokeDefault(proxy, method, args);
+    }
+
     String methodName = method.getName();
 
     if ("equals".equals(methodName) && method.getParameterCount() == 1) {
@@ -65,11 +97,100 @@ public class MapperInvocationHandler<E> implements InvocationHandler {
         return false;
       }
       if (Proxy.isProxyClass(otherObj.getClass())) {
-				return this == Proxy.getInvocationHandler(otherObj);
+        if (this == Proxy.getInvocationHandler(otherObj)) {
+          return true;
+        }
+      }
+      if (otherObj instanceof MapExportable) {
+        return MappingUtil.compareMaps((MapExportable) otherObj, src);
       }
       return false;
     }
 
+    if (MapExportable.PUT_METHOD.equals(methodName) && method.getParameterCount() == 2) {
+      final String key;
+      if (args[0] instanceof String) {
+        key = (String) args[0];
+      } else if (args[0] instanceof Getter) {
+        key = MappingUtil.resolveMappingProperty((Getter) args[0]).getProperty().getPropertyName();
+      } else {
+        key = null;
+      }
+      if (key != null) {
+        final Object value = (Object) args[1];
+        if (src instanceof ValueProviderMap) {
+          this.src = fromValueProviderMap(src);
+        }
+        src.put(key, value);
+      }
+      return null;
+    }
+
+    if (Entity.WRITTEN_AT_METHOD.equals(methodName) && method.getParameterCount() == 1) {
+      final String key;
+      if (args[0] instanceof String) {
+        key = CacheUtil.writeTimeKey((String) args[0]);
+      } else if (args[0] instanceof Getter) {
+        Getter getter = (Getter) args[0];
+        key =
+            CacheUtil.writeTimeKey(
+                MappingUtil.resolveMappingProperty(getter)
+                    .getProperty()
+                    .getColumnName()
+                    .toCql(false));
+      } else {
+        return 0L;
+      }
+      Long v = (Long) src.get(key);
+      if (v != null) {
+        return v;
+      }
+      return 0L;
+    }
+
+    if (Entity.TOKEN_OF_METHOD.equals(methodName) && method.getParameterCount() == 0) {
+        Long v = (Long) src.get("");
+        if (v != null) {
+            return v;
+        }
+        return 0L;
+    }
+
+    if (Entity.TTL_OF_METHOD.equals(methodName) && method.getParameterCount() == 1) {
+      final String key;
+      if (args[0] instanceof String) {
+        key = CacheUtil.ttlKey((String) args[0]);
+      } else if (args[0] instanceof Getter) {
+        Getter getter = (Getter) args[0];
+        key =
+            CacheUtil.ttlKey(
+                MappingUtil.resolveMappingProperty(getter)
+                    .getProperty()
+                    .getColumnName()
+                    .toCql(false));
+      } else {
+        return 0;
+      }
+      int v[] = (int[]) src.get(key);
+      if (v != null) {
+        return v[0];
+      }
+      return 0;
+    }
+
+    if (MapExportable.TO_MAP_METHOD.equals(methodName)) {
+      if (method.getParameterCount() == 1 && args[0] instanceof Boolean) {
+        if ((boolean) args[0] == true) {
+          return fromValueProviderMap(src, true);
+        }
+      }
+      return Collections.unmodifiableMap(src);
+    }
+
+    if (MapExportable.TO_READ_SET_METHOD.equals(methodName)) {
+      return read;
+    }
+
     if (method.getParameterCount() != 0 || method.getReturnType() == void.class) {
       throw new HelenusException("invalid getter method " + method);
     }
@@ -82,30 +203,92 @@ public class MapperInvocationHandler<E> implements InvocationHandler {
       return iface.getSimpleName() + ": " + src.toString();
     }
 
-		if (MapExportable.TO_MAP_METHOD.equals(methodName)) {
-			return Collections.unmodifiableMap(src);
+    if ("writeReplace".equals(methodName)) {
+      return new SerializationProxy(this);
     }
 
-		Object value = src.get(methodName);
+    if ("readObject".equals(methodName)) {
+      throw new InvalidObjectException("Proxy required.");
+    }
+
+    if ("dsl".equals(methodName)) {
+      return Helenus.dsl(iface);
+    }
+
+    final Object value = src.get(methodName);
+    read.add(methodName);
 
     if (value == null) {
 
       Class<?> returnType = method.getReturnType();
 
-			if (returnType.isPrimitive()) {
+      // Default implementations of non-Transient methods in entities are the default
+      // value when the map contains 'null'.
+      if (method.isDefault()) {
+        return invokeDefault(proxy, method, args);
+      }
 
+      // Otherwise, if the return type of the method is a primitive Java type then
+      // we'll return the standard default values to avoid a NPE in user code.
+      if (returnType.isPrimitive()) {
         DefaultPrimitiveTypes type = DefaultPrimitiveTypes.lookup(returnType);
         if (type == null) {
           throw new HelenusException("unknown primitive type " + returnType);
         }
-
         return type.getDefaultValue();
-
       }
-
     }
 
     return value;
   }
 
+  static Map<String, Object> fromValueProviderMap(Map v) {
+    return fromValueProviderMap(v, false);
+  }
+
+  static Map<String, Object> fromValueProviderMap(Map v, boolean mutable) {
+    if (v instanceof ValueProviderMap) {
+      Map<String, Object> m = new HashMap<String, Object>(v.size());
+      Set<String> keys = v.keySet();
+      for (String key : keys) {
+        Object value = v.get(key);
+        if (value != null && mutable) {
+          if (ImmutableList.class.isAssignableFrom(value.getClass())) {
+            m.put(key, new ArrayList((List) value));
+          } else if (ImmutableMap.class.isAssignableFrom(value.getClass())) {
+            m.put(key, new HashMap((Map) value));
+          } else if (ImmutableSet.class.isAssignableFrom(value.getClass())) {
+            m.put(key, new HashSet((Set) value));
+          } else {
+            m.put(key, value);
+          }
+        } else {
+          m.put(key, value);
+        }
+      }
+      return m;
+    }
+    return v;
+  }
+
+  static class SerializationProxy<E> implements Serializable {
+
+    private static final long serialVersionUID = -5617583940055969353L;
+
+    private final Class<E> iface;
+    private final Map<String, Object> src;
+
+    public SerializationProxy(MapperInvocationHandler mapper) {
+      this.iface = mapper.iface;
+      if (mapper.src instanceof ValueProviderMap) {
+        this.src = fromValueProviderMap(mapper.src);
+      } else {
+        this.src = mapper.src;
+      }
+    }
+
+    Object readResolve() throws ObjectStreamException {
+      return new MapperInvocationHandler(iface, src);
+    }
+  }
 }

src/main/java/net/helenus/core/reflect/ReflectionDslInstantiator.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,22 +16,25 @@
  */
 package net.helenus.core.reflect;
 
+import com.datastax.driver.core.Metadata;
 import java.lang.reflect.Proxy;
 import java.util.Optional;
-
-import com.datastax.driver.core.Metadata;
 import net.helenus.core.DslInstantiator;
 
 public enum ReflectionDslInstantiator implements DslInstantiator {
-
   INSTANCE;
 
   @Override
   @SuppressWarnings("unchecked")
-	public <E> E instantiate(Class<E> iface, ClassLoader classLoader, Optional<HelenusPropertyNode> parent, Metadata metadata) {
-		DslInvocationHandler<E> handler = new DslInvocationHandler<E>(iface, classLoader, parent, metadata);
-		E proxy = (E) Proxy.newProxyInstance(classLoader, new Class[]{iface, DslExportable.class}, handler);
+  public <E> E instantiate(
+      Class<E> iface,
+      ClassLoader classLoader,
+      Optional<HelenusPropertyNode> parent,
+      Metadata metadata) {
+    DslInvocationHandler<E> handler =
+        new DslInvocationHandler<E>(iface, classLoader, parent, metadata);
+    E proxy =
+        (E) Proxy.newProxyInstance(classLoader, new Class[] {iface, DslExportable.class}, handler);
     return proxy;
   }
-
 }

src/main/java/net/helenus/core/reflect/ReflectionInstantiator.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -19,8 +20,7 @@ import net.helenus.support.HelenusMappingException;
 
 public final class ReflectionInstantiator {
 
-	private ReflectionInstantiator() {
-	}
+  private ReflectionInstantiator() {}
 
   public static <T> T instantiateClass(Class<T> clazz) {
 
@@ -29,7 +29,5 @@ public final class ReflectionInstantiator {
     } catch (InstantiationException | IllegalAccessException e) {
       throw new HelenusMappingException("invalid class " + clazz, e);
     }
-
   }
-
 }

src/main/java/net/helenus/core/reflect/ReflectionMapperInstantiator.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,13 +16,12 @@
  */
 package net.helenus.core.reflect;
 
+import java.io.Serializable;
 import java.lang.reflect.Proxy;
 import java.util.Map;
-
 import net.helenus.core.MapperInstantiator;
 
 public enum ReflectionMapperInstantiator implements MapperInstantiator {
-
   INSTANCE;
 
   @Override
@@ -29,9 +29,10 @@ public enum ReflectionMapperInstantiator implements MapperInstantiator {
   public <E> E instantiate(Class<E> iface, Map<String, Object> src, ClassLoader classLoader) {
 
     MapperInvocationHandler<E> handler = new MapperInvocationHandler<E>(iface, src);
-		E proxy = (E) Proxy.newProxyInstance(classLoader, new Class[]{iface, MapExportable.class}, handler);
+    E proxy =
+        (E)
+            Proxy.newProxyInstance(
+                classLoader, new Class[] {iface, MapExportable.class, Serializable.class}, handler);
     return proxy;
-
   }
-
 }

src/main/java/net/helenus/core/reflect/SetDsl.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -18,7 +19,6 @@ package net.helenus.core.reflect;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.Set;
-
 import net.helenus.support.HelenusMappingException;
 
 public final class SetDsl<V> implements Set<V> {

src/main/java/net/helenus/mapping/ColumnInformation.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -16,7 +17,6 @@
 package net.helenus.mapping;
 
 import java.lang.reflect.Method;
-
 import net.helenus.mapping.annotation.ClusteringColumn;
 import net.helenus.mapping.annotation.Column;
 import net.helenus.mapping.annotation.PartitionKey;
@@ -103,15 +103,21 @@ public final class ColumnInformation {
   private void ensureSingleColumnType(ColumnType columnTypeLocal, Method getter) {
 
     if (columnTypeLocal != ColumnType.COLUMN) {
-			throw new HelenusMappingException("property can be annotated only by a single column type " + getter);
+      throw new HelenusMappingException(
+          "property can be annotated only by a single column type " + getter);
     }
-
   }
 
   @Override
   public String toString() {
-		return "ColumnInformation [columnName=" + columnName + ", columnType=" + columnType + ", ordinal=" + ordinal
-				+ ", ordering=" + ordering + "]";
+    return "ColumnInformation [columnName="
+        + columnName
+        + ", columnType="
+        + columnType
+        + ", ordinal="
+        + ordinal
+        + ", ordering="
+        + ordering
+        + "]";
   }
-
 }

src/main/java/net/helenus/mapping/ColumnType.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -16,5 +17,8 @@
 package net.helenus.mapping;
 
 public enum ColumnType {
-	PARTITION_KEY, CLUSTERING_COLUMN, STATIC_COLUMN, COLUMN;
+  PARTITION_KEY,
+  CLUSTERING_COLUMN,
+  STATIC_COLUMN,
+  COLUMN;
 }

src/main/java/net/helenus/mapping/HelenusEntity.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -16,6 +17,8 @@
 package net.helenus.mapping;
 
 import java.util.Collection;
+import java.util.List;
+import net.helenus.core.cache.Facet;
 
 public interface HelenusEntity {
 
@@ -31,4 +34,7 @@ public interface HelenusEntity {
 
   HelenusProperty getProperty(String name);
 
+  List<Facet> getFacets();
+
+  boolean isDraftable();
 }

src/main/java/net/helenus/mapping/HelenusEntityType.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -16,5 +17,8 @@
 package net.helenus.mapping;
 
 public enum HelenusEntityType {
-	TABLE, TUPLE, UDT;
+  TABLE,
+  VIEW,
+  TUPLE,
+  UDT;
 }

src/main/java/net/helenus/mapping/HelenusMappingEntity.java

@@ -1,6 +1,7 @@
 /*
  *
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
  *   You may obtain a copy of the License at
@@ -15,20 +16,23 @@
  */
 package net.helenus.mapping;
 
-import java.lang.reflect.Method;
-import java.util.*;
-
-import com.datastax.driver.core.*;
+import com.datastax.driver.core.DefaultMetadata;
+import com.datastax.driver.core.Metadata;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
-
-import com.google.common.collect.ImmutableSet;
-import com.google.common.reflect.TypeToken;
+import java.lang.reflect.Method;
+import java.util.*;
+import javax.validation.ConstraintValidator;
 import net.helenus.config.HelenusSettings;
 import net.helenus.core.Helenus;
 import net.helenus.core.annotation.Cacheable;
+import net.helenus.core.cache.Facet;
+import net.helenus.core.cache.UnboundFacet;
 import net.helenus.mapping.annotation.*;
+import net.helenus.mapping.validator.DistinctValidator;
 import net.helenus.support.HelenusMappingException;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.StringUtils;
 
 public final class HelenusMappingEntity implements HelenusEntity {
 
@@ -36,9 +40,11 @@ public final class HelenusMappingEntity implements HelenusEntity {
   private final HelenusEntityType type;
   private final IdentityName name;
   private final boolean cacheable;
+  private final boolean draftable;
   private final ImmutableMap<String, Method> methods;
   private final ImmutableMap<String, HelenusProperty> props;
   private final ImmutableList<HelenusProperty> orderedProps;
+  private final List<Facet> facets;
 
   public HelenusMappingEntity(Class<?> iface, Metadata metadata) {
     this(iface, autoDetectType(iface), metadata);
@@ -56,19 +62,33 @@ public final class HelenusMappingEntity implements HelenusEntity {
 
     HelenusSettings settings = Helenus.settings();
 
+    Map<String, Method> methods = new HashMap<String, Method>();
+    for (Method m : iface.getDeclaredMethods()) {
+      methods.put(m.getName(), m);
+    }
 
-		List<Method> methods = new ArrayList<Method>();
-
-        methods.addAll(Arrays.asList(iface.getDeclaredMethods()));
-		for (Class<?> c : iface.getInterfaces()) {
-            methods.addAll(Arrays.asList(c.getDeclaredMethods()));
+    for (Class<?> c : ClassUtils.getAllInterfaces(iface)) {
+      if (c.getDeclaredAnnotation(Table.class) != null
+          || c.getDeclaredAnnotation(InheritedTable.class) != null) {
+        for (Method m : c.getDeclaredMethods()) {
+          Method o = methods.get(m.getName());
+          if (o != null) {
+            // Prefer overridden method implementation.
+            if (o.getDeclaringClass().isAssignableFrom(m.getDeclaringClass())) {
+              methods.put(m.getName(), m);
+            }
+          } else {
+            methods.put(m.getName(), m);
+          }
+        }
+      }
     }
 
     List<HelenusProperty> propsLocal = new ArrayList<HelenusProperty>();
     ImmutableMap.Builder<String, HelenusProperty> propsBuilder = ImmutableMap.builder();
     ImmutableMap.Builder<String, Method> methodsBuilder = ImmutableMap.builder();
 
-		for (Method method : methods) {
+    for (Method method : methods.values()) {
 
       if (settings.getGetterMethodDetector().apply(method)) {
 
@@ -80,9 +100,7 @@ public final class HelenusMappingEntity implements HelenusEntity {
           propsBuilder.put(prop.getPropertyName(), prop);
           propsLocal.add(prop);
         }
-
       }
-
     }
 
     this.methods = methodsBuilder.build();
@@ -93,7 +111,107 @@ public final class HelenusMappingEntity implements HelenusEntity {
 
     validateOrdinals();
 
+    // Caching
     cacheable = (null != iface.getDeclaredAnnotation(Cacheable.class));
+
+    // Draft
+    Class<?> draft;
+    try {
+      draft = Class.forName(iface.getName() + "$Draft");
+    } catch (Exception ignored) {
+      draft = null;
+    }
+    draftable = (draft != null);
+
+    // Materialized view
+    List<HelenusProperty> primaryKeyProperties = new ArrayList<>();
+    ImmutableList.Builder<Facet> facetsBuilder = ImmutableList.builder();
+    if (iface.getDeclaredAnnotation(MaterializedView.class) == null) {
+      facetsBuilder.add(new Facet("table", name.toCql()).setFixed());
+    } else {
+      facetsBuilder.add(
+          new Facet("table", Helenus.entity(iface.getInterfaces()[0]).getName().toCql())
+              .setFixed());
+    }
+    for (HelenusProperty prop : orderedProps) {
+      switch (prop.getColumnType()) {
+        case PARTITION_KEY:
+        case CLUSTERING_COLUMN:
+          primaryKeyProperties.add(prop);
+          break;
+        default:
+          if (primaryKeyProperties != null && primaryKeyProperties.size() > 0) {
+            facetsBuilder.add(new UnboundFacet(primaryKeyProperties));
+            primaryKeyProperties = null;
+          }
+          for (ConstraintValidator<?, ?> constraint :
+              MappingUtil.getValidators(prop.getGetterMethod())) {
+            if (constraint instanceof DistinctValidator) {
+              DistinctValidator validator = (DistinctValidator) constraint;
+              String[] values = validator.constraintAnnotation.value();
+              UnboundFacet facet;
+              if (values != null && values.length >= 1 && !(StringUtils.isBlank(values[0]))) {
+                List<HelenusProperty> props = new ArrayList<HelenusProperty>(values.length + 1);
+                props.add(prop);
+                for (String value : values) {
+                  for (HelenusProperty p : orderedProps) {
+                    String name = p.getPropertyName();
+                    if (name.equals(value) && !name.equals(prop.getPropertyName())) {
+                      props.add(p);
+                    }
+                  }
+                }
+                facet = new UnboundFacet(props, validator.alone(), validator.combined());
+              } else {
+                facet = new UnboundFacet(prop, validator.alone(), validator.combined());
+              }
+              facetsBuilder.add(facet);
+              break;
+            }
+          }
+      }
+    }
+    if (primaryKeyProperties != null && primaryKeyProperties.size() > 0) {
+      facetsBuilder.add(new UnboundFacet(primaryKeyProperties));
+    }
+    this.facets = facetsBuilder.build();
+  }
+
+  private static IdentityName resolveName(Class<?> iface, HelenusEntityType type) {
+
+    switch (type) {
+      case TABLE:
+        return MappingUtil.getTableName(iface, true);
+
+      case VIEW:
+        return MappingUtil.getViewName(iface, true);
+
+      case TUPLE:
+        return IdentityName.of(MappingUtil.getDefaultEntityName(iface), false);
+
+      case UDT:
+        return MappingUtil.getUserDefinedTypeName(iface, true);
+    }
+
+    throw new HelenusMappingException("invalid entity type " + type + " in " + type);
+  }
+
+  private static HelenusEntityType autoDetectType(Class<?> iface) {
+
+    Objects.requireNonNull(iface, "empty iface");
+
+    if (null != iface.getDeclaredAnnotation(Table.class)) {
+      return HelenusEntityType.TABLE;
+    } else if (null != iface.getDeclaredAnnotation(MaterializedView.class)) {
+      return HelenusEntityType.VIEW;
+    } else if (null != iface.getDeclaredAnnotation(Tuple.class)) {
+      return HelenusEntityType.TUPLE;
+    } else if (null != iface.getDeclaredAnnotation(UDT.class)) {
+      return HelenusEntityType.UDT;
+    }
+
+    throw new HelenusMappingException(
+        "entity must be annotated by @Table or @Tuple or @UserDefinedType " + iface);
   }
 
   @Override
@@ -106,6 +224,11 @@ public final class HelenusMappingEntity implements HelenusEntity {
     return cacheable;
   }
 
+  @Override
+  public boolean isDraftable() {
+    return draftable;
+  }
+
   @Override
   public Class<?> getMappingInterface() {
     return iface;
@@ -121,69 +244,35 @@ public final class HelenusMappingEntity implements HelenusEntity {
     HelenusProperty property = props.get(name);
     if (property == null && methods.containsKey(name)) {
       property = new HelenusMappingProperty(this, methods.get(name), new DefaultMetadata());
-            return property; //TODO(gburd): review adding these into the props map...
+      return property; // TODO(gburd): review adding these into the props map...
     }
     return props.get(name);
   }
 
+  @Override
+  public List<Facet> getFacets() {
+    return facets;
+  }
+
   @Override
   public IdentityName getName() {
     return name;
   }
 
-	private static IdentityName resolveName(Class<?> iface, HelenusEntityType type) {
-
-		switch (type) {
-
-			case TABLE :
-				return MappingUtil.getTableName(iface, true);
-
-			case TUPLE :
-				return IdentityName.of(MappingUtil.getDefaultEntityName(iface), false);
-
-			case UDT :
-				return MappingUtil.getUserDefinedTypeName(iface, true);
-		}
-
-		throw new HelenusMappingException("invalid entity type " + type + " in " + type);
-
-	}
-
-	private static HelenusEntityType autoDetectType(Class<?> iface) {
-
-		Objects.requireNonNull(iface, "empty iface");
-
-		if (null != iface.getDeclaredAnnotation(Table.class)) {
-			return HelenusEntityType.TABLE;
-		}
-
-		else if (null != iface.getDeclaredAnnotation(Tuple.class)) {
-			return HelenusEntityType.TUPLE;
-		}
-
-		else if (null != iface.getDeclaredAnnotation(UDT.class)) {
-			return HelenusEntityType.UDT;
-		}
-
-		throw new HelenusMappingException("entity must be annotated by @Table or @Tuple or @UserDefinedType " + iface);
-	}
-
   private void validateOrdinals() {
 
     switch (getType()) {
-
-			case TABLE :
+      case TABLE:
         validateOrdinalsForTable();
         break;
 
-			case TUPLE :
+      case TUPLE:
         validateOrdinalsInTuple();
         break;
 
-			default :
+      default:
         break;
     }
-
   }
 
   private void validateOrdinalsForTable() {
@@ -198,51 +287,61 @@ public final class HelenusMappingEntity implements HelenusEntity {
       int ordinal = prop.getOrdinal();
 
       switch (type) {
-
-				case PARTITION_KEY :
+        case PARTITION_KEY:
           if (partitionKeys.get(ordinal)) {
             throw new HelenusMappingException(
-								"detected two or more partition key columns with the same ordinal " + ordinal + " in "
+                "detected two or more partition key columns with the same ordinal "
+                    + ordinal
+                    + " in "
                     + prop.getEntity());
           }
           partitionKeys.set(ordinal);
           break;
 
-				case CLUSTERING_COLUMN :
+        case CLUSTERING_COLUMN:
           if (clusteringColumns.get(ordinal)) {
-						throw new HelenusMappingException("detected two or clustering columns with the same ordinal "
-								+ ordinal + " in " + prop.getEntity());
+            throw new HelenusMappingException(
+                "detected two or clustering columns with the same ordinal "
+                    + ordinal
+                    + " in "
+                    + prop.getEntity());
           }
           clusteringColumns.set(ordinal);
           break;
 
-				default :
+        default:
           break;
       }
-
     }
-
   }
 
   private void validateOrdinalsInTuple() {
     boolean[] ordinals = new boolean[props.size()];
 
-		getOrderedProperties().forEach(p -> {
-
+    getOrderedProperties()
+        .forEach(
+            p -> {
               int ordinal = p.getOrdinal();
 
               if (ordinal < 0 || ordinal >= ordinals.length) {
-				throw new HelenusMappingException("invalid ordinal " + ordinal + " found for property "
-						+ p.getPropertyName() + " in " + p.getEntity());
+                throw new HelenusMappingException(
+                    "invalid ordinal "
+                        + ordinal
+                        + " found for property "
+                        + p.getPropertyName()
+                        + " in "
+                        + p.getEntity());
               }
 
               if (ordinals[ordinal]) {
                 throw new HelenusMappingException(
-						"detected two or more properties with the same ordinal " + ordinal + " in " + p.getEntity());
+                    "detected two or more properties with the same ordinal "
+                        + ordinal
+                        + " in "
+                        + p.getEntity());
               }
 
               ordinals[ordinal] = true;
-
             });
 
     for (int i = 0; i != ordinals.length; ++i) {
@@ -250,15 +349,18 @@ public final class HelenusMappingEntity implements HelenusEntity {
         throw new HelenusMappingException("detected absent ordinal " + i + " in " + this);
       }
     }
-
   }
 
   @Override
   public String toString() {
 
     StringBuilder str = new StringBuilder();
-		str.append(iface.getSimpleName()).append("(").append(name.getName()).append(") ")
-				.append(type.name().toLowerCase()).append(":\n");
+    str.append(iface.getSimpleName())
+        .append("(")
+        .append(name.getName())
+        .append(") ")
+        .append(type.name().toLowerCase())
+        .append(":\n");
 
     for (HelenusProperty prop : getOrderedProperties()) {
       str.append(prop.toString());
@@ -266,5 +368,4 @@ public final class HelenusMappingEntity implements HelenusEntity {
     }
     return str.toString();
   }
-
 }

src/main/java/net/helenus/mapping/HelenusMappingProperty.java

@@ -1,5 +1,6 @@
 /*
- *      Copyright (C) 2015 The Helenus Authors
+ *      Copyright (C) 2015 The Casser Authors
+ *      Copyright (C) 2015-2018 The Helenus Authors
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
@@ -15,15 +16,13 @@
  */
 package net.helenus.mapping;
 
+import com.datastax.driver.core.Metadata;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.lang.reflect.Type;
 import java.util.Optional;
 import java.util.function.Function;
-
 import javax.validation.ConstraintValidator;
-
-import com.datastax.driver.core.Metadata;
 import net.helenus.core.SessionRepository;
 import net.helenus.mapping.javatype.AbstractJavaType;
 import net.helenus.mapping.javatype.MappingJavaTypes;
@@ -37,6 +36,7 @@ public final class HelenusMappingProperty implements HelenusProperty {
   private final String propertyName;
   private final Optional<IdentityName> indexName;
   private final boolean caseSensitiveIndex;
+  private final boolean idempotent;
 
   private final ColumnInformation columnInfo;
 
@@ -44,12 +44,10 @@ public final class HelenusMappingProperty implements HelenusProperty {
   private final Class<?> javaType;
   private final AbstractJavaType abstractJavaType;
   private final AbstractDataType dataType;
-
+  private final ConstraintValidator<? extends Annotation, ?>[] validators;
   private volatile Optional<Function<Object, Object>> readConverter = null;
   private volatile Optional<Function<Object, Object>> writeConverter = null;
 
-	private final ConstraintValidator<? extends Annotation, ?>[] validators;
-
   public HelenusMappingProperty(HelenusMappingEntity entity, Method getter, Metadata metadata) {
     this.entity = entity;
     this.getter = getter;
@@ -60,12 +58,22 @@ public final class HelenusMappingProperty implements HelenusProperty {
 
     this.columnInfo = new ColumnInformation(getter);
 
+    switch (this.columnInfo.getColumnType()) {
+      case PARTITION_KEY:
+      case CLUSTERING_COLUMN:
+        this.idempotent = true;
+        break;
+      default:
+        this.idempotent = MappingUtil.idempotent(getter);
+    }
+
     this.genericJavaType = getter.getGenericReturnType();
     this.javaType = getter.getReturnType();
     this.abstractJavaType = MappingJavaTypes.resolveJavaType(this.javaType);
 
-		this.dataType = abstractJavaType.resolveDataType(this.getter, this.genericJavaType,
-				this.columnInfo.getColumnType(), metadata);
+    this.dataType =
+        abstractJavaType.resolveDataType(
+            this.getter, this.genericJavaType, this.columnInfo.getColumnType(), metadata);
 
     this.validators = MappingUtil.getValidators(getter);
   }
@@ -115,6 +123,11 @@ public final class HelenusMappingProperty implements HelenusProperty {
     return caseSensitiveIndex;
   }
 
+  @Override
+  public boolean isIdempotent() {
+    return idempotent;
+  }
+
   @Override
   public String getPropertyName() {
     return propertyName;
@@ -169,14 +182,13 @@ public final class HelenusMappingProperty implements HelenusProperty {
     ColumnType type = this.getColumnType();
 
     switch (type) {
-
-			case PARTITION_KEY :
+      case PARTITION_KEY:
         str.append("partition_key[");
         str.append(this.getOrdinal());
         str.append("] ");
         break;
 
-			case CLUSTERING_COLUMN :
+      case CLUSTERING_COLUMN:
         str.append("clustering_column[");
         str.append(this.getOrdinal());
         str.append("] ");
@@ -186,13 +198,12 @@ public final class HelenusMappingProperty implements HelenusProperty {
         }
         break;
 
-			case STATIC_COLUMN :
+      case STATIC_COLUMN:
         str.append("static ");
         break;
 
-			case COLUMN :
+      case COLUMN:
         break;
-
     }
 
     Optional<IdentityName> idx = this.getIndexName();
@@ -202,5 +213,4 @@ public final class HelenusMappingProperty implements HelenusProperty {
 
     return str.toString();
   }
-
 }