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<div class="aboutLanguage"><b>Berkeley DB Java Edition</b><br><font size=\"-1\"> version 7.5.11</font>
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<div class="header">
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<div class="subTitle">com.sleepycat.je</div>
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<h2 title="Class Durability" class="title">Class Durability</h2>
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<ul class="inheritance">
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<li>java.lang.Object</li>
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<ul class="inheritance">
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<li>com.sleepycat.je.Durability</li>
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<pre>public class <span class="typeNameLabel">Durability</span>
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extends java.lang.Object</pre>
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<div class="block">Durability defines the overall durability characteristics associated with a
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transaction. When operating on a local environment the durability of a
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transaction is completely determined by the local <a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je"><code>Durability.SyncPolicy</code></a> that is
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in effect. When using replication, the overall durability is a function of
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the local <a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je"><code>Durability.SyncPolicy</code></a> plus the <a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je"><code>Durability.ReplicaAckPolicy</code></a> used by the
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master and the <a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je"><code>Durability.SyncPolicy</code></a> in effect at each Replica.</div>
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<caption><span>Nested Classes</span><span class="tabEnd"> </span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Class and Description</th>
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<td class="colFirst"><code>static class </code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a></span></code>
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<div class="block">A replicated environment makes it possible to increase an application's
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transaction commit guarantees by committing changes to its replicas on
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the network.</div>
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</td>
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<tr class="rowColor">
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<td class="colFirst"><code>static class </code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a></span></code>
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<div class="block">Defines the synchronization policy to be used when committing a
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transaction.</div>
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</td>
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</table>
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<h3>Field Summary</h3>
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<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
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<caption><span>Fields</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Field and Description</th>
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<tr class="altColor">
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<td class="colFirst"><code>static <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#COMMIT_NO_SYNC">COMMIT_NO_SYNC</a></span></code>
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<div class="block">A convenience constant that defines a durability policy with
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COMMIT_NO_SYNC for local commit synchronization.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#COMMIT_SYNC">COMMIT_SYNC</a></span></code>
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<div class="block">A convenience constant that defines a durability policy with COMMIT_SYNC
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for local commit synchronization.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#COMMIT_WRITE_NO_SYNC">COMMIT_WRITE_NO_SYNC</a></span></code>
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<div class="block">A convenience constant that defines a durability policy with
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COMMIT_WRITE_NO_SYNC for local commit synchronization.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#READ_ONLY_TXN">READ_ONLY_TXN</a></span></code>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span>
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<div class="block"><span class="deprecationComment">use <a href="../../../com/sleepycat/je/TransactionConfig.html#setReadOnly-boolean-"><code>TransactionConfig.setReadOnly(boolean)</code></a> instead.</span></div>
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</div>
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<h3>Constructor Summary</h3>
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<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#Durability-com.sleepycat.je.Durability.SyncPolicy-com.sleepycat.je.Durability.SyncPolicy-com.sleepycat.je.Durability.ReplicaAckPolicy-">Durability</a></span>(<a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a> localSync,
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<a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a> replicaSync,
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<a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a> replicaAck)</code>
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<div class="block">Creates an instance of a Durability specification.</div>
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</td>
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</table>
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<h3>Method Summary</h3>
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<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
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<td class="colFirst"><code>boolean</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#equals-java.lang.Object-">equals</a></span>(java.lang.Object obj)</code> </td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code><a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#getLocalSync--">getLocalSync</a></span>()</code>
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<div class="block">Returns the transaction synchronization policy to be used locally when
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committing a transaction.</div>
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</td>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code><a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#getReplicaAck--">getReplicaAck</a></span>()</code>
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<div class="block">Returns the replica acknowledgment policy used by the master when
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committing changes to a replicated environment.</div>
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</td>
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</tr>
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<tr id="i3" class="rowColor">
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<td class="colFirst"><code><a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#getReplicaSync--">getReplicaSync</a></span>()</code>
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<div class="block">Returns the transaction synchronization policy to be used by the replica
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as it replays a transaction that needs an acknowledgment.</div>
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</td>
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</tr>
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<tr id="i4" class="altColor">
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<td class="colFirst"><code>int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#hashCode--">hashCode</a></span>()</code> </td>
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</tr>
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<tr id="i5" class="rowColor">
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<td class="colFirst"><code>static <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#parse-java.lang.String-">parse</a></span>(java.lang.String durabilityString)</code>
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<div class="block">Parses the string and returns the durability it represents.</div>
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</td>
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</tr>
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<tr id="i6" class="altColor">
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<td class="colFirst"><code>java.lang.String</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.html#toString--">toString</a></span>()</code>
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<div class="block">Returns the string representation of durability in the format defined
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by string form of the Durability constructor.</div>
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</td>
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<h3>Methods inherited from class java.lang.Object</h3>
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<code>clone, finalize, getClass, notify, notifyAll, wait, wait, wait</code></li>
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</ul>
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<div class="details">
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</a>
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<h3>Field Detail</h3>
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<a name="COMMIT_SYNC">
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<h4>COMMIT_SYNC</h4>
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<pre>public static final <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a> COMMIT_SYNC</pre>
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<div class="block">A convenience constant that defines a durability policy with COMMIT_SYNC
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for local commit synchronization.
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The replicated environment policies default to COMMIT_NO_SYNC for
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commits of replicated transactions that need acknowledgment and
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SIMPLE_MAJORITY for the acknowledgment policy.</div>
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<a name="COMMIT_NO_SYNC">
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<h4>COMMIT_NO_SYNC</h4>
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<pre>public static final <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a> COMMIT_NO_SYNC</pre>
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<div class="block">A convenience constant that defines a durability policy with
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COMMIT_NO_SYNC for local commit synchronization.
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The replicated environment policies default to COMMIT_NO_SYNC for
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commits of replicated transactions that need acknowledgment and
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SIMPLE_MAJORITY for the acknowledgment policy.</div>
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<pre>public static final <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a> COMMIT_WRITE_NO_SYNC</pre>
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<div class="block">A convenience constant that defines a durability policy with
|
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COMMIT_WRITE_NO_SYNC for local commit synchronization.
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The replicated environment policies default to COMMIT_NO_SYNC for
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commits of replicated transactions that need acknowledgment and
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SIMPLE_MAJORITY for the acknowledgment policy.</div>
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<pre>public static final <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a> READ_ONLY_TXN</pre>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">use <a href="../../../com/sleepycat/je/TransactionConfig.html#setReadOnly-boolean-"><code>TransactionConfig.setReadOnly(boolean)</code></a> instead.</span></div>
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<div class="block">A convenience constant that defines a durability policy, with
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<code>ReplicaAckPolicy.NONE</code> for use with a read only transaction.
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A read only transaction on a Master, using this Durability, will thus
|
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not be held up, or throw <code>InsufficientReplicasException</code>, if
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the Master is not in contact with a sufficient number of Replicas at the
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time the transaction was initiated. </p>
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It's worth noting that since the transaction is read only, the sync
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policies, although specified as <code>NO_SYNC</code>, do not really
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matter.</div>
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<h3>Constructor Detail</h3>
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<a name="Durability-com.sleepycat.je.Durability.SyncPolicy-com.sleepycat.je.Durability.SyncPolicy-com.sleepycat.je.Durability.ReplicaAckPolicy-">
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<h4>Durability</h4>
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<pre>public Durability(<a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a> localSync,
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<a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a> replicaSync,
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<a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a> replicaAck)</pre>
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<div class="block">Creates an instance of a Durability specification.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>localSync</code> - the SyncPolicy to be used when committing the
|
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transaction locally.</dd>
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<dd><code>replicaSync</code> - the SyncPolicy to be used remotely, as part of a
|
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transaction acknowledgment, at a Replica node.</dd>
|
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<dd><code>replicaAck</code> - the acknowledgment policy used when obtaining
|
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transaction acknowledgments from Replicas.</dd>
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</dl>
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<h4>parse</h4>
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<pre>public static <a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a> parse(java.lang.String durabilityString)</pre>
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<div class="block">Parses the string and returns the durability it represents. The string
|
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must have the following format:
|
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<p>
|
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<code>
|
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<i>SyncPolicy</i>[,<i>SyncPolicy</i>[,<i>ReplicaAckPolicy</i>]]
|
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</code>
|
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<p>
|
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The first SyncPolicy in the above format applies to the Master, and the
|
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optional second SyncPolicy to the replica. Specific SyncPolicy or
|
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|
ReplicaAckPolicy values are denoted by the name of the enumeration
|
||
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value.
|
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<p>
|
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For example, the string:<i>sync,sync,quorum</i> describes a durability
|
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|
policy where the master and replica both use <a href="../../../com/sleepycat/je/Durability.SyncPolicy.html#SYNC"><code>Durability.SyncPolicy.SYNC</code></a>
|
||
|
to commit transactions and <a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html#SIMPLE_MAJORITY"><code>Durability.ReplicaAckPolicy.SIMPLE_MAJORITY</code></a> to
|
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|
acknowledge a transaction commit.
|
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<p>
|
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<a href="../../../com/sleepycat/je/Durability.SyncPolicy.html#NO_SYNC"><code>Durability.SyncPolicy.NO_SYNC</code></a>, is the default value for a node's
|
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|
SyncPolicy.
|
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<p>
|
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<a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html#SIMPLE_MAJORITY"><code>Durability.ReplicaAckPolicy.SIMPLE_MAJORITY</code></a> is the default for the
|
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|
ReplicaAckPolicy.</div>
|
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
|
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|
<dd><code>durabilityString</code> - the durability string in the above format</dd>
|
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<dt><span class="returnLabel">Returns:</span></dt>
|
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<dd>the Durability resulting from the parse, or null if the
|
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<code>durabilityString</code> argument was itself null.</dd>
|
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<dt><span class="throwsLabel">Throws:</span></dt>
|
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<dd><code>java.lang.IllegalArgumentException</code> - if the durabilityString is invalid.</dd>
|
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</dl>
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<a name="toString--">
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<h4>toString</h4>
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<pre>public java.lang.String toString()</pre>
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<div class="block">Returns the string representation of durability in the format defined
|
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by string form of the Durability constructor.</div>
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<dl>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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<dd><code>toString</code> in class <code>java.lang.Object</code></dd>
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<dt><span class="seeLabel">See Also:</span></dt>
|
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<dd><a href="../../../com/sleepycat/je/Durability.html#parse-java.lang.String-"><code>parse(String)</code></a></dd>
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<h4>getLocalSync</h4>
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<pre>public <a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a> getLocalSync()</pre>
|
||
|
<div class="block">Returns the transaction synchronization policy to be used locally when
|
||
|
committing a transaction.</div>
|
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</ul>
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<a name="getReplicaSync--">
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<h4>getReplicaSync</h4>
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<pre>public <a href="../../../com/sleepycat/je/Durability.SyncPolicy.html" title="enum in com.sleepycat.je">Durability.SyncPolicy</a> getReplicaSync()</pre>
|
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|
<div class="block">Returns the transaction synchronization policy to be used by the replica
|
||
|
as it replays a transaction that needs an acknowledgment.</div>
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</li>
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</ul>
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<h4>getReplicaAck</h4>
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<pre>public <a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a> getReplicaAck()</pre>
|
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<div class="block">Returns the replica acknowledgment policy used by the master when
|
||
|
committing changes to a replicated environment.</div>
|
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</li>
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</ul>
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<h4>hashCode</h4>
|
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<pre>public int hashCode()</pre>
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<dl>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
|
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<dd><code>hashCode</code> in class <code>java.lang.Object</code></dd>
|
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</dl>
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</li>
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</ul>
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<h4>equals</h4>
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<pre>public boolean equals(java.lang.Object obj)</pre>
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<dl>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
|
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<dd><code>equals</code> in class <code>java.lang.Object</code></dd>
|
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</dl>
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</li>
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</ul>
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</li>
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</ul>
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