98 lines
2.1 KiB
Markdown
98 lines
2.1 KiB
Markdown
# casser
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Fast and easy, functional style cutting edge Java 8 and Scala 2.11 Cassandra client
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Current status: First application in production (may be more)
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### Features
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* Leverages Java 8 language capabilities to build CQL queries
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* Simple function-style stream API
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* Reactive asynchronous and synchronous API
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* Provides Java mapping for Tables, Tuples, UDTs (User Defined Type), Collections, UDT Collections, Tuple Collections
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* Provides Lazy mapping in all cases where possible
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### Requirements
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* Latest JVM 8
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* Latest Datastax Driver 2.1.5
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* Latest Cassandra 2.1.4
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* Latest Scala 2.11
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* Latest Maven as well
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### Maven
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Latest release dependency:
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```
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<dependencies>
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<dependency>
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<groupId>com.noorq.casser</groupId>
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<artifactId>casser-core</artifactId>
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<version>1.0.0</version>
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</dependency>
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</dependencies>
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```
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Active development dependency:
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```
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<dependencies>
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<dependency>
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<groupId>com.noorq.casser</groupId>
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<artifactId>casser-core</artifactId>
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<version>1.1.0-SNAPSHOT</version>
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</dependency>
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</dependencies>
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<repositories>
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<repository>
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<id>oss-sonatype</id>
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<name>oss-sonatype</name>
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<url>https://oss.sonatype.org/content/repositories/snapshots/</url>
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<snapshots>
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<enabled>true</enabled>
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</snapshots>
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</repository>
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</repositories>
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```
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### Example
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Entity definition:
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```
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@Table("timelines")
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public interface Timeline {
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@PartitionKey
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UUID userId();
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@ClusteringColumn
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@Types.Timeuuid
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Date timestamp();
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@Column
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String text();
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}
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```
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Session initialization:
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```
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Timeline timeline = Casser.dsl(Timeline.class);
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CasserSession session = Casser.init(getSession()).showCql().add(Timeline.class).autoCreateDrop().get();
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```
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Select information:
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```
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session.select(timeline::userId, timeline::timestamp, timeline::text)
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.where(timeline::userId, Query.eq(userId))
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.orderBy(Query.desc(timeline::timestamp)).limit(5).sync()
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.forEach(System.out::println);
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```
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Insert information:
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```
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TimelineImpl post = new TimelineImpl();
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post.userId=userId;
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post.timestamp=new Date(postTime+1000L*i);
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post.text="hello";
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session.upsert(post).sync();
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```
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