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<div class="subTitle">com.sleepycat.je</div>
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<h2 title="Enum Durability.ReplicaAckPolicy" class="title">Enum Durability.ReplicaAckPolicy</h2>
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<ul class="inheritance">
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<li>java.lang.Enum<<a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a>></li>
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<ul class="inheritance">
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<li>com.sleepycat.je.Durability.ReplicaAckPolicy</li>
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<dt>All Implemented Interfaces:</dt>
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<dd>java.io.Serializable, java.lang.Comparable<<a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a>></dd>
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</dl>
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<dl>
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<dt>Enclosing class:</dt>
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<dd><a href="../../../com/sleepycat/je/Durability.html" title="class in com.sleepycat.je">Durability</a></dd>
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</dl>
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<hr>
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<br>
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<pre>public static enum <span class="typeNameLabel">Durability.ReplicaAckPolicy</span>
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extends java.lang.Enum<<a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a>></pre>
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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. ReplicaAckPolicy defines the policy for how such network
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commits are handled.
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<p>
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The choice of a ReplicaAckPolicy must be consistent across all the
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replicas in a replication group, to ensure that the policy is
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consistently enforced in the event of an election.
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<p>Note that SECONDARY nodes are not included in the set of replicas
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that must acknowledge transaction commits.</div>
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</li>
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<h3>Enum Constant Summary</h3>
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<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Enum Constant Summary table, listing enum constants, and an explanation">
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<caption><span>Enum Constants</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colOne" scope="col">Enum Constant and Description</th>
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</tr>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html#ALL">ALL</a></span></code>
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<div class="block">All ELECTABLE replicas must acknowledge that they have committed the
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transaction.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html#NONE">NONE</a></span></code>
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<div class="block">No transaction commit acknowledgments are required and the master
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will never wait for replica acknowledgments.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html#SIMPLE_MAJORITY">SIMPLE_MAJORITY</a></span></code>
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<div class="block">A simple majority of ELECTABLE replicas must acknowledge that they
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have committed the transaction.</div>
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</td>
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</tr>
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</table>
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<h3>Method Summary</h3>
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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>
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<tr id="i0" 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.ReplicaAckPolicy.html#minAckNodes-int-">minAckNodes</a></span>(int groupSize)</code>
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<div class="block">Returns the minimum number of ELECTABLE replicas required to
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implement the ReplicaAckPolicy for a given replication group size.</div>
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</td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>static <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.ReplicaAckPolicy.html#valueOf-java.lang.String-">valueOf</a></span>(java.lang.String name)</code>
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<div class="block">Returns the enum constant of this type with the specified name.</div>
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</td>
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</tr>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code>static <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.ReplicaAckPolicy.html#values--">values</a></span>()</code>
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<div class="block">Returns an array containing the constants of this enum type, in
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the order they are declared.</div>
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</td>
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</tr>
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<h3>Methods inherited from class java.lang.Enum</h3>
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<code>clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf</code></li>
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<h3>Methods inherited from class java.lang.Object</h3>
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<code>getClass, notify, notifyAll, wait, wait, wait</code></li>
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<h4>ALL</h4>
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<pre>public static final <a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a> ALL</pre>
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<div class="block">All ELECTABLE replicas must acknowledge that they have committed the
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transaction. This policy should be selected only if your replication
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group has a small number of ELECTABLE replicas, and those replicas
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are on extremely reliable networks and servers.</div>
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</li>
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<h4>NONE</h4>
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<pre>public static final <a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a> NONE</pre>
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<div class="block">No transaction commit acknowledgments are required and the master
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will never wait for replica acknowledgments. In this case,
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transaction durability is determined entirely by the type of commit
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that is being performed on the master.</div>
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</li>
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</ul>
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<a name="SIMPLE_MAJORITY">
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<h4>SIMPLE_MAJORITY</h4>
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<pre>public static final <a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a> SIMPLE_MAJORITY</pre>
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<div class="block">A simple majority of ELECTABLE replicas must acknowledge that they
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have committed the transaction. This acknowledgment policy, in
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conjunction with an election policy which requires at least a simple
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majority, ensures that the changes made by the transaction remains
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durable if a new election is held.
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<p>
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This is the default.</div>
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</li>
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<h4>values</h4>
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<pre>public static <a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a>[] values()</pre>
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<div class="block">Returns an array containing the constants of this enum type, in
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the order they are declared. This method may be used to iterate
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over the constants as follows:
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<pre>
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for (Durability.ReplicaAckPolicy c : Durability.ReplicaAckPolicy.values())
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System.out.println(c);
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</pre></div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>an array containing the constants of this enum type, in the order they are declared</dd>
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</dl>
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</li>
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</ul>
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<a name="valueOf-java.lang.String-">
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<h4>valueOf</h4>
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<pre>public static <a href="../../../com/sleepycat/je/Durability.ReplicaAckPolicy.html" title="enum in com.sleepycat.je">Durability.ReplicaAckPolicy</a> valueOf(java.lang.String name)</pre>
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<div class="block">Returns the enum constant of this type with the specified name.
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The string must match <i>exactly</i> an identifier used to declare an
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enum constant in this type. (Extraneous whitespace characters are
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not permitted.)</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>name</code> - the name of the enum constant to be returned.</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the enum constant with the specified name</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code>java.lang.IllegalArgumentException</code> - if this enum type has no constant with the specified name</dd>
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<dd><code>java.lang.NullPointerException</code> - if the argument is null</dd>
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</dl>
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</li>
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</ul>
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<a name="minAckNodes-int-">
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<h4>minAckNodes</h4>
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<pre>public int minAckNodes(int groupSize)</pre>
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<div class="block">Returns the minimum number of ELECTABLE replicas required to
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implement the ReplicaAckPolicy for a given replication group size.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>groupSize</code> - the number of ELECTABLE replicas in the replication
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group</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the number of ELECTABLE replicas needed</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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<div class="aboutLanguage"><b>Berkeley DB Java Edition</b><br><font size=\"-1\"> version 7.5.11</font>
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