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| <div class="subTitle">org.apache.geode.management.membership</div> |
| <h2 title="Class UniversalMembershipListenerAdapter" class="title">Class UniversalMembershipListenerAdapter</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
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| <li> |
| <ul class="inheritance"> |
| <li>org.apache.geode.management.membership.UniversalMembershipListenerAdapter</li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
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| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../org/apache/geode/management/membership/MembershipListener.html" title="interface in org.apache.geode.management.membership">MembershipListener</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public abstract class <span class="typeNameLabel">UniversalMembershipListenerAdapter</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="../../../../../org/apache/geode/management/membership/MembershipListener.html" title="interface in org.apache.geode.management.membership">MembershipListener</a></pre> |
| <div class="block"><p> |
| The <code>UniversalMembershipListenerAdapter</code> is a wrapper for |
| <a href="../../../../../org/apache/geode/management/membership/MembershipListener.html" title="interface in org.apache.geode.management.membership"><code>MembershipListener</code></a> and |
| <a href="../../../../../org/apache/geode/management/membership/ClientMembershipListener.html" title="interface in org.apache.geode.management.membership"><code>ClientMembershipListener</code></a>, providing a facade that makes both appear as a single |
| <code>MembershipListener</code> . This includes adapting <code>ClientMembershipListener</code> |
| events to appear as events for the <code>MembershipListener</code>. |
| <p> |
| <code>UniversalMembershipListenerAdapter</code> implements <code>MembershipListener</code>, |
| exposing the callback in that interface as methods to be overridden by implementing classes. |
| <p> |
| An internal implementation of <code>ClientMembershipListener</code> is registered when this class |
| is instantiated. This implementation creates a |
| <a href="../../../../../org/apache/geode/management/membership/MembershipEvent.html" title="interface in org.apache.geode.management.membership"><code>MembershipEvent</code></a> and calls the corresponding |
| <code>MembershipListener</code> public methods on |
| <code>UniversalMembershipListenerAdapter</code>.The <code>ClientMembershipEvent</code>s are |
| wrapped to appear as <code>MembershipEvent</code>s. In this way, both types of membership events |
| appear as <code>MembershipEvent</code>s. |
| <p> |
| Any CacheServer using the <code>UniversalMembershipListenerAdapter</code> will receive |
| notifications of peer membership changes and client membership changes through a single listener. |
| <p> |
| Any cache client using the <code>UniversalMembershipListenerAdapter</code> would receive |
| notifications of cache server connection changes. If that cache client also creates a connection |
| to the GemFire <a href="../../../../../org/apache/geode/distributed/DistributedSystem.html" title="class in org.apache.geode.distributed"><code>DistributedSystem</code></a>, then it will also register |
| the adapter for membership events. But it wont be an automatic process. User needs to register |
| the UniversalMembershipListenerAdapter with ManagementService to receive membership events. How |
| to register UniversalMembershipListenerAdapter with ManagementService is explained below. |
| <p> |
| Subclasses of <code>UniversalMembershipListenerAdapter</code> may be registered as a |
| <code>MembershipListener</code> using |
| <a href="../../../../../org/apache/geode/management/ManagementService.html#addMembershipListener-org.apache.geode.management.membership.MembershipListener-"><code>ManagementService.addMembershipListener(org.apache.geode.management.membership.MembershipListener)</code></a> .It is best, however, |
| to register the listener using <a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#registerMembershipListener-org.apache.geode.management.ManagementService-"><code>registerMembershipListener(org.apache.geode.management.ManagementService)</code></a> since this allows the adapter |
| to prevent duplicate events for members that are both a peer member and a client. |
| <p> |
| Simply constructing the <code>UniversalMembershipListenerAdapter</code> results in the underlying |
| <code>ClientMembershipListener</code> also being registered. |
| <p> |
| The following code illustrates how a CacheServer application would use |
| <code>UniversalMembershipListenerAdapter</code>. The code in this example assumes that the class |
| MyMembershipListenerImpl extends <code>UniversalMembershipListenerAdapter</code>: |
| |
| <pre> |
| <code> |
| public class MyMembershipListenerImpl extends UniversalMembershipListenerAdapter { |
| public void memberCrashed(MembershipEvent event) { |
| // customer code |
| } |
| public void memberLeft(MembershipEvent event) { |
| // customer code |
| } |
| public void memberJoined(MembershipEvent event) { |
| // customer code |
| } |
| } |
| |
| Cache cache = //Get hold of GemFire Cache instance |
| ManagementService service = ManagementService.getExistingManagementService(cache); |
| |
| MyMembershipListenerImpl myListener = new MyMembershipListenerImpl(); |
| myListener.registerMembershipListener(service); |
| </code> |
| </pre> |
| |
| The callback on MyMembershipListenerImpl would then be invoked for all |
| <code>MembershipEvent</code>s and <code>ClientMembershipEvent</code>s. The latter will appear to |
| be <code>MembershipEvent</code>s. |
| <p> |
| Similarly, the following code illustrates how a client application would use |
| <code>UniversalMembershipListenerAdapter</code>, where MyMembershipListenerImpl is a |
| subclass.Simply by constructing this subclass of <code>UniversalMembershipListenerAdapter</code> |
| it is registering itself as a <code>ClientMembershipListener</code>: |
| |
| <pre> |
| <code> |
| new MyMembershipListenerImpl(); |
| </code> |
| </pre> |
| |
| A client that also connects to the <code>DistributedSystem</code> could register with |
| the<code>ManagementService</code> as shown above. |
| <p> |
| It is recommended that subclasses register with the <code>ManagementService</code> using |
| <a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#registerMembershipListener-org.apache.geode.management.ManagementService-"><code>registerMembershipListener(org.apache.geode.management.ManagementService)</code></a>, as this will prevent duplicate events for members that are |
| both clients and peer members.If duplicate events are acceptable, you may register subclasses |
| using <a href="../../../../../org/apache/geode/management/ManagementService.html#addMembershipListener-org.apache.geode.management.membership.MembershipListener-"><code>ManagementService#addMembershipListener</code></a>. |
| <p></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>GemFire 8.0</dd> |
| </dl> |
| </li> |
| </ul> |
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| <!-- ======== NESTED CLASS SUMMARY ======== --> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.AdaptedMembershipEvent.html" title="class in org.apache.geode.management.membership">UniversalMembershipListenerAdapter.AdaptedMembershipEvent</a></span></code> |
| <div class="block">Adapts ClientMembershipEvent to look like a MembershipEvent</div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#DEFAULT_HISTORY_SIZE">DEFAULT_HISTORY_SIZE</a></span></code> |
| <div class="block">Default number of historical events to track in order to avoid duplicate events for members |
| that are both clients and peer members; value is 100.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/geode/management/membership/MembershipListener.html" title="interface in org.apache.geode.management.membership">MembershipListener</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#membershipListener">membershipListener</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#UniversalMembershipListenerAdapter--">UniversalMembershipListenerAdapter</a></span>()</code> |
| <div class="block">Constructs an instance of UniversalMembershipListenerAdapter.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#UniversalMembershipListenerAdapter-int-">UniversalMembershipListenerAdapter</a></span>(int historySize)</code> |
| <div class="block">Constructs an instance of UniversalMembershipListenerAdapter.</div> |
| </td> |
| </tr> |
| </table> |
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| </ul> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#memberCrashed-org.apache.geode.management.membership.MembershipEvent-">memberCrashed</a></span>(<a href="../../../../../org/apache/geode/management/membership/MembershipEvent.html" title="interface in org.apache.geode.management.membership">MembershipEvent</a> event)</code> |
| <div class="block">Invoked when a member has unexpectedly left the distributed system.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#memberJoined-org.apache.geode.management.membership.MembershipEvent-">memberJoined</a></span>(<a href="../../../../../org/apache/geode/management/membership/MembershipEvent.html" title="interface in org.apache.geode.management.membership">MembershipEvent</a> event)</code> |
| <div class="block">Invoked when a member has joined the distributed system.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#memberLeft-org.apache.geode.management.membership.MembershipEvent-">memberLeft</a></span>(<a href="../../../../../org/apache/geode/management/membership/MembershipEvent.html" title="interface in org.apache.geode.management.membership">MembershipEvent</a> event)</code> |
| <div class="block">Invoked when a member has gracefully left the distributed system.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#registerClientMembershipListener--">registerClientMembershipListener</a></span>()</code> |
| <div class="block">Registers this adapter as a <code>ClientMembershipListener</code>.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#registerMembershipListener-org.apache.geode.management.ManagementService-">registerMembershipListener</a></span>(<a href="../../../../../org/apache/geode/management/ManagementService.html" title="class in org.apache.geode.management">ManagementService</a> service)</code> |
| <div class="block">Registers this adapter with the <code>ManagementService</code>.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#unregisterClientMembershipListener--">unregisterClientMembershipListener</a></span>()</code> |
| <div class="block">Unregisters this adapter as a <code>ClientMembershipListener</code>.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#unregisterMembershipListener-org.apache.geode.management.ManagementService-">unregisterMembershipListener</a></span>(<a href="../../../../../org/apache/geode/management/ManagementService.html" title="class in org.apache.geode.management">ManagementService</a> service)</code> |
| <div class="block">Unregisters this adapter with the <code>ManagementService</code>.</div> |
| </td> |
| </tr> |
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| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
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| <h4>DEFAULT_HISTORY_SIZE</h4> |
| <pre>public static final int DEFAULT_HISTORY_SIZE</pre> |
| <div class="block">Default number of historical events to track in order to avoid duplicate events for members |
| that are both clients and peer members; value is 100.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../constant-values.html#org.apache.geode.management.membership.UniversalMembershipListenerAdapter.DEFAULT_HISTORY_SIZE">Constant Field Values</a></dd> |
| </dl> |
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| <h4>membershipListener</h4> |
| <pre>protected final <a href="../../../../../org/apache/geode/management/membership/MembershipListener.html" title="interface in org.apache.geode.management.membership">MembershipListener</a> membershipListener</pre> |
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| <pre>public UniversalMembershipListenerAdapter()</pre> |
| <div class="block">Constructs an instance of UniversalMembershipListenerAdapter.</div> |
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| <pre>public UniversalMembershipListenerAdapter(int historySize)</pre> |
| <div class="block">Constructs an instance of UniversalMembershipListenerAdapter.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>historySize</code> - number of historical events to track in order to avoid duplicate events for |
| members that are both client and peer members; must a number between 10 and |
| <code>Integer.MAX_INT</code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if historySize is less than 10</dd> |
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| <h3>Method Detail</h3> |
| <a name="registerMembershipListener-org.apache.geode.management.ManagementService-"> |
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| <h4>registerMembershipListener</h4> |
| <pre>public void registerMembershipListener(<a href="../../../../../org/apache/geode/management/ManagementService.html" title="class in org.apache.geode.management">ManagementService</a> service)</pre> |
| <div class="block">Registers this adapter with the <code>ManagementService</code>. Registering in this way allows |
| the adapter to ensure that callback will not be invoked twice for members that have a client |
| connection and a peer connection. If you register with |
| <a href="../../../../../org/apache/geode/management/ManagementService.html#addMembershipListener-org.apache.geode.management.membership.MembershipListener-"><code>ManagementService.addMembershipListener(org.apache.geode.management.membership.MembershipListener)</code></a> then duplicate |
| events may occur for members that are both client and peer.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>service</code> - the <code>ManagementService</code> with which to register this adapter</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="unregisterMembershipListener-org.apache.geode.management.ManagementService-"> |
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| <h4>unregisterMembershipListener</h4> |
| <pre>public void unregisterMembershipListener(<a href="../../../../../org/apache/geode/management/ManagementService.html" title="class in org.apache.geode.management">ManagementService</a> service)</pre> |
| <div class="block">Unregisters this adapter with the <code>ManagementService</code>. If registration is performed |
| with <a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#registerMembershipListener-org.apache.geode.management.ManagementService-"><code>registerMembershipListener(org.apache.geode.management.ManagementService)</code></a> then this method must be used to successfully |
| unregister the adapter.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>service</code> - the <code>ManagementService</code> with which to unregister this adapter</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="registerClientMembershipListener--"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>registerClientMembershipListener</h4> |
| <pre>public void registerClientMembershipListener()</pre> |
| <div class="block">Registers this adapter as a <code>ClientMembershipListener</code>. Registration is automatic |
| when constructing this adapter, so this call is not necessary unless it was previously |
| unregistered by calling <a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#unregisterClientMembershipListener--"><code>unregisterClientMembershipListener()</code></a>.</div> |
| </li> |
| </ul> |
| <a name="unregisterClientMembershipListener--"> |
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| <h4>unregisterClientMembershipListener</h4> |
| <pre>public void unregisterClientMembershipListener()</pre> |
| <div class="block">Unregisters this adapter as a <code>ClientMembershipListener</code>.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/geode/management/membership/UniversalMembershipListenerAdapter.html#registerClientMembershipListener--"><code>registerClientMembershipListener()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="memberJoined-org.apache.geode.management.membership.MembershipEvent-"> |
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| </a> |
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| <h4>memberJoined</h4> |
| <pre>public void memberJoined(<a href="../../../../../org/apache/geode/management/membership/MembershipEvent.html" title="interface in org.apache.geode.management.membership">MembershipEvent</a> event)</pre> |
| <div class="block">Invoked when a member has joined the distributed system. Also invoked when a client has |
| connected to this process or when this process has connected to a <code>CacheServer</code>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/geode/management/membership/MembershipListener.html#memberJoined-org.apache.geode.management.membership.MembershipEvent-">memberJoined</a></code> in interface <code><a href="../../../../../org/apache/geode/management/membership/MembershipListener.html" title="interface in org.apache.geode.management.membership">MembershipListener</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>event</code> - the triggering event</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="memberLeft-org.apache.geode.management.membership.MembershipEvent-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>memberLeft</h4> |
| <pre>public void memberLeft(<a href="../../../../../org/apache/geode/management/membership/MembershipEvent.html" title="interface in org.apache.geode.management.membership">MembershipEvent</a> event)</pre> |
| <div class="block">Invoked when a member has gracefully left the distributed system. Also invoked when a client |
| has gracefully disconnected from this process. or when this process has gracefully disconnected |
| from a <code>CacheServer</code>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/geode/management/membership/MembershipListener.html#memberLeft-org.apache.geode.management.membership.MembershipEvent-">memberLeft</a></code> in interface <code><a href="../../../../../org/apache/geode/management/membership/MembershipListener.html" title="interface in org.apache.geode.management.membership">MembershipListener</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>event</code> - the triggering event</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="memberCrashed-org.apache.geode.management.membership.MembershipEvent-"> |
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| <h4>memberCrashed</h4> |
| <pre>public void memberCrashed(<a href="../../../../../org/apache/geode/management/membership/MembershipEvent.html" title="interface in org.apache.geode.management.membership">MembershipEvent</a> event)</pre> |
| <div class="block">Invoked when a member has unexpectedly left the distributed system. Also invoked when a client |
| has unexpectedly disconnected from this process or when this process has unexpectedly |
| disconnected from a <code>CacheServer</code>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/geode/management/membership/MembershipListener.html#memberCrashed-org.apache.geode.management.membership.MembershipEvent-">memberCrashed</a></code> in interface <code><a href="../../../../../org/apache/geode/management/membership/MembershipListener.html" title="interface in org.apache.geode.management.membership">MembershipListener</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>event</code> - the triggering event</dd> |
| </dl> |
| </li> |
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