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<div class="subTitle">com.sleepycat.je.rep.monitor</div>
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<h2 title="Interface MonitorChangeListener" class="title">Interface MonitorChangeListener</h2>
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<pre>public interface <span class="typeNameLabel">MonitorChangeListener</span></pre>
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<div class="block">Applications can register for Monitor event notification through
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<a href="../../../../../com/sleepycat/je/rep/monitor/Monitor.html#startListener-com.sleepycat.je.rep.monitor.MonitorChangeListener-"><code>Monitor.startListener(com.sleepycat.je.rep.monitor.MonitorChangeListener)</code></a>. The interface defines an overloaded notify
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event for each event supported by the Monitor.
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<p>
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Changes in the composition of the replication group, or in the dynamic state
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of a member, are communicated to the listener as events that are represented
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as subclasses of <a href="../../../../../com/sleepycat/je/rep/monitor/MonitorChangeEvent.html" title="class in com.sleepycat.je.rep.monitor"><code>MonitorChangeEvent</code></a>. Classes
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implementing this interface supply implementations for a <code>notify</code>
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associated with each type of event, so they can respond with some
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application-specific course of action.
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<p>
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See <a href="../../../../../../ReplicationGuide/monitors.html"
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target="_blank">Replication Guide, Writing Monitor Nodes</a></div>
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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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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/sleepycat/je/rep/monitor/MonitorChangeListener.html#notify-com.sleepycat.je.rep.monitor.GroupChangeEvent-">notify</a></span>(<a href="../../../../../com/sleepycat/je/rep/monitor/GroupChangeEvent.html" title="class in com.sleepycat.je.rep.monitor">GroupChangeEvent</a> groupChangeEvent)</code>
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<div class="block">The method is invoked whenever there is a change in the composition of
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the replication group.</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>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/sleepycat/je/rep/monitor/MonitorChangeListener.html#notify-com.sleepycat.je.rep.monitor.JoinGroupEvent-">notify</a></span>(<a href="../../../../../com/sleepycat/je/rep/monitor/JoinGroupEvent.html" title="class in com.sleepycat.je.rep.monitor">JoinGroupEvent</a> joinGroupEvent)</code>
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<div class="block">The method is invoked whenever a node joins the group, by successfully
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opening its first
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<a href="../../../../../com/sleepycat/je/rep/ReplicatedEnvironment.html" title="class in com.sleepycat.je.rep"><code>ReplicatedEnvironment</code></a> handle.</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>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/sleepycat/je/rep/monitor/MonitorChangeListener.html#notify-com.sleepycat.je.rep.monitor.LeaveGroupEvent-">notify</a></span>(<a href="../../../../../com/sleepycat/je/rep/monitor/LeaveGroupEvent.html" title="class in com.sleepycat.je.rep.monitor">LeaveGroupEvent</a> leaveGroupEvent)</code>
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<div class="block">The method is invoked whenever a node leaves the group by closing its
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last <a href="../../../../../com/sleepycat/je/rep/ReplicatedEnvironment.html" title="class in com.sleepycat.je.rep"><code>ReplicatedEnvironment</code></a> handle.</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>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/sleepycat/je/rep/monitor/MonitorChangeListener.html#notify-com.sleepycat.je.rep.monitor.NewMasterEvent-">notify</a></span>(<a href="../../../../../com/sleepycat/je/rep/monitor/NewMasterEvent.html" title="class in com.sleepycat.je.rep.monitor">NewMasterEvent</a> newMasterEvent)</code>
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<div class="block">The method is invoked whenever there is new master associated with the
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replication group.</div>
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</td>
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</tr>
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</table>
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</li>
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</li>
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</ul>
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<div class="details">
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<!-- ============ METHOD DETAIL ========== -->
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<!-- -->
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<h3>Method Detail</h3>
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<a name="notify-com.sleepycat.je.rep.monitor.NewMasterEvent-">
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<h4>notify</h4>
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<pre>void notify(<a href="../../../../../com/sleepycat/je/rep/monitor/NewMasterEvent.html" title="class in com.sleepycat.je.rep.monitor">NewMasterEvent</a> newMasterEvent)</pre>
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<div class="block">The method is invoked whenever there is new master associated with the
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replication group.
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If the method throws an exception, JE will log the exception as a trace
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message, which will be propagated through the usual channels.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>newMasterEvent</code> - the event that resulted in the notify. It
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identifies the new master.</dd>
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</dl>
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</li>
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</ul>
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<a name="notify-com.sleepycat.je.rep.monitor.GroupChangeEvent-">
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<h4>notify</h4>
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<pre>void notify(<a href="../../../../../com/sleepycat/je/rep/monitor/GroupChangeEvent.html" title="class in com.sleepycat.je.rep.monitor">GroupChangeEvent</a> groupChangeEvent)</pre>
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<div class="block">The method is invoked whenever there is a change in the composition of
|
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the replication group. That is, a new node has been added to the group
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or an existing member has been removed from the group. Note that
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SECONDARY nodes do not produce these events.
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If the method throws an exception, JE will log the exception as a trace
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message, which will be propagated through the usual channels.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>groupChangeEvent</code> - the event that resulted in the notify. It
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describes the new group composition and identifies the node that
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provoked the change.</dd>
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</dl>
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</li>
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<a name="notify-com.sleepycat.je.rep.monitor.JoinGroupEvent-">
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<h4>notify</h4>
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<pre>void notify(<a href="../../../../../com/sleepycat/je/rep/monitor/JoinGroupEvent.html" title="class in com.sleepycat.je.rep.monitor">JoinGroupEvent</a> joinGroupEvent)</pre>
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<div class="block">The method is invoked whenever a node joins the group, by successfully
|
||
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opening its first
|
||
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<a href="../../../../../com/sleepycat/je/rep/ReplicatedEnvironment.html" title="class in com.sleepycat.je.rep"><code>ReplicatedEnvironment</code></a> handle.</div>
|
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
|
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<dd><code>joinGroupEvent</code> - the event that resulted in the notify. It
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identifies the node that joined the group.</dd>
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</dl>
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</li>
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</ul>
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<a name="notify-com.sleepycat.je.rep.monitor.LeaveGroupEvent-">
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<h4>notify</h4>
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<pre>void notify(<a href="../../../../../com/sleepycat/je/rep/monitor/LeaveGroupEvent.html" title="class in com.sleepycat.je.rep.monitor">LeaveGroupEvent</a> leaveGroupEvent)</pre>
|
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<div class="block">The method is invoked whenever a node leaves the group by closing its
|
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|
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last <a href="../../../../../com/sleepycat/je/rep/ReplicatedEnvironment.html" title="class in com.sleepycat.je.rep"><code>ReplicatedEnvironment</code></a> handle.</div>
|
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<dl>
|
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<dt><span class="paramLabel">Parameters:</span></dt>
|
||
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<dd><code>leaveGroupEvent</code> - the event that resulted in the notify. It
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identifies the node that left the group.</dd>
|
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</dl>
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</li>
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</ul>
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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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