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<div class="subTitle">org.apache.ignite.events</div>
<h2 title="Class CacheRebalancingEvent" class="title">Class CacheRebalancingEvent</h2>
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<li>org.apache.ignite.events.CacheRebalancingEvent</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a><span class='angle_bracket'>&lt;</span><a href="../../../../org/apache/ignite/events/Event.html" title="interface in org.apache.ignite.events">Event</a><span class='angle_bracket'>&gt;</span>, <a href="../../../../org/apache/ignite/events/Event.html" title="interface in org.apache.ignite.events">Event</a></dd>
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<pre>public class <span class="strong">CacheRebalancingEvent</span>
extends <a href="../../../../org/apache/ignite/events/EventAdapter.html" title="class in org.apache.ignite.events">EventAdapter</a></pre>
<div class="block">In-memory database (cache) rebalancing event. Rebalance event happens every time there is a change
in grid topology, which means that a node has either joined or left the grid.
<p>
Grid events are used for notification about what happens within the grid. Note that by
design Ignite keeps all events generated on the local node locally and it provides
APIs for performing a distributed queries across multiple nodes:
<ul>
<li>
<a href="../../../../org/apache/ignite/IgniteEvents.html#remoteQuery(org.apache.ignite.lang.IgnitePredicate, long, int...)"><code>IgniteEvents.remoteQuery(IgnitePredicate, long, int...)</code></a> -
asynchronously querying events occurred on the nodes specified, including remote nodes.
</li>
<li>
<a href="../../../../org/apache/ignite/IgniteEvents.html#localQuery(org.apache.ignite.lang.IgnitePredicate, int...)"><code>IgniteEvents.localQuery(IgnitePredicate, int...)</code></a> -
querying only local events stored on this local node.
</li>
<li>
<a href="../../../../org/apache/ignite/IgniteEvents.html#localListen(org.apache.ignite.lang.IgnitePredicate, int...)"><code>IgniteEvents.localListen(IgnitePredicate, int...)</code></a> -
listening to local grid events (events from remote nodes not included).
</li>
</ul>
User can also wait for events using method <a href="../../../../org/apache/ignite/IgniteEvents.html#waitForLocal(org.apache.ignite.lang.IgnitePredicate, int...)"><code>IgniteEvents.waitForLocal(IgnitePredicate, int...)</code></a>.
<h1 class="header">Events and Performance</h1>
Note that by default all events in Ignite are enabled and therefore generated and stored
by whatever event storage SPI is configured. Ignite can and often does generate thousands events per seconds
under the load and therefore it creates a significant additional load on the system. If these events are
not needed by the application this load is unnecessary and leads to significant performance degradation.
<p>
It is <b>highly recommended</b> to enable only those events that your application logic requires
by using <a href="../../../../org/apache/ignite/configuration/IgniteConfiguration.html#getIncludeEventTypes()"><code>IgniteConfiguration.getIncludeEventTypes()</code></a> method in Ignite configuration. Note that certain
events are required for Ignite's internal operations and such events will still be generated but not stored by
event storage SPI if they are disabled in Ignite configuration.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/apache/ignite/events/EventType.html#EVT_CACHE_REBALANCE_PART_LOADED"><code>EventType.EVT_CACHE_REBALANCE_PART_LOADED</code></a>,
<a href="../../../../org/apache/ignite/events/EventType.html#EVT_CACHE_REBALANCE_PART_UNLOADED"><code>EventType.EVT_CACHE_REBALANCE_PART_UNLOADED</code></a>,
<a href="../../../../org/apache/ignite/events/EventType.html#EVT_CACHE_REBALANCE_STARTED"><code>EventType.EVT_CACHE_REBALANCE_STARTED</code></a>,
<a href="../../../../org/apache/ignite/events/EventType.html#EVT_CACHE_REBALANCE_STOPPED"><code>EventType.EVT_CACHE_REBALANCE_STOPPED</code></a>,
<a href="../../../../org/apache/ignite/events/EventType.html#EVT_CACHE_REBALANCE_PART_DATA_LOST"><code>EventType.EVT_CACHE_REBALANCE_PART_DATA_LOST</code></a>,
<a href="../../../../serialized-form.html#org.apache.ignite.events.CacheRebalancingEvent">Serialized Form</a></dd></dl>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#CacheRebalancingEvent(java.lang.String, org.apache.ignite.cluster.ClusterNode, java.lang.String, int, int, org.apache.ignite.cluster.ClusterNode, int, long)">CacheRebalancingEvent</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;cacheName,
<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a>&nbsp;node,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;msg,
int&nbsp;type,
int&nbsp;part,
<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a>&nbsp;discoNode,
int&nbsp;discoEvtType,
long&nbsp;discoTs)</code>
<div class="block">Constructs cache event.</div>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr class="altColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#cacheName()">cacheName</a></strong>()</code>
<div class="block">Gets cache name.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#discoveryEventName()">discoveryEventName</a></strong>()</code>
<div class="block">Gets name of discovery event that triggered this rebalancing event.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#discoveryEventType()">discoveryEventType</a></strong>()</code>
<div class="block">Gets type of discovery event that triggered this rebalancing event.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#discoveryNode()">discoveryNode</a></strong>()</code>
<div class="block">Gets shadow of the node that triggered this rebalancing event.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#discoveryTimestamp()">discoveryTimestamp</a></strong>()</code>
<div class="block">Gets timestamp of discovery event that caused this rebalancing event.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#partition()">partition</a></strong>()</code>
<div class="block">Gets partition for the event.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#shortDisplay()">shortDisplay</a></strong>()</code>
<div class="block">Gets a shortened version of <code>toString()</code> result.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/ignite/events/CacheRebalancingEvent.html#toString()">toString</a></strong>()</code></td>
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<code><a href="../../../../org/apache/ignite/events/EventAdapter.html#compareTo(org.apache.ignite.events.Event)">compareTo</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#equals(java.lang.Object)">equals</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#hashCode()">hashCode</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#id()">id</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#localOrder()">localOrder</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#message()">message</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#message(java.lang.String)">message</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#name()">name</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#node()">node</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#node(org.apache.ignite.cluster.ClusterNode)">node</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#timestamp()">timestamp</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#type()">type</a>, <a href="../../../../org/apache/ignite/events/EventAdapter.html#type(int)">type</a></code></li>
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<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li>
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<h3>Constructor Detail</h3>
<a name="CacheRebalancingEvent(java.lang.String, org.apache.ignite.cluster.ClusterNode, java.lang.String, int, int, org.apache.ignite.cluster.ClusterNode, int, long)">
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<h4>CacheRebalancingEvent</h4>
<pre>public&nbsp;CacheRebalancingEvent(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;cacheName,
<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a>&nbsp;node,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;msg,
int&nbsp;type,
int&nbsp;part,
<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a>&nbsp;discoNode,
int&nbsp;discoEvtType,
long&nbsp;discoTs)</pre>
<div class="block">Constructs cache event.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>cacheName</code> - Cache name.</dd><dd><code>node</code> - Event node.</dd><dd><code>msg</code> - Event message.</dd><dd><code>type</code> - Event type.</dd><dd><code>part</code> - Partition for the event (usually the partition the key belongs to).</dd><dd><code>discoNode</code> - Node that triggered this rebalancing event.</dd><dd><code>discoEvtType</code> - Discovery event type that triggered this rebalancing event.</dd><dd><code>discoTs</code> - Timestamp of discovery event that triggered this rebalancing event.</dd></dl>
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<h4>cacheName</h4>
<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;cacheName()</pre>
<div class="block">Gets cache name.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Cache name.</dd></dl>
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<h4>partition</h4>
<pre>public&nbsp;int&nbsp;partition()</pre>
<div class="block">Gets partition for the event.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Partition for the event.</dd></dl>
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<h4>discoveryNode</h4>
<pre>public&nbsp;<a href="../../../../org/apache/ignite/cluster/ClusterNode.html" title="interface in org.apache.ignite.cluster">ClusterNode</a>&nbsp;discoveryNode()</pre>
<div class="block">Gets shadow of the node that triggered this rebalancing event.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Shadow of the node that triggered this rebalancing event.</dd></dl>
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<h4>discoveryEventType</h4>
<pre>public&nbsp;int&nbsp;discoveryEventType()</pre>
<div class="block">Gets type of discovery event that triggered this rebalancing event.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Type of discovery event that triggered this rebalancing event.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/apache/ignite/events/EventAdapter.html#type()"><code>EventAdapter.type()</code></a></dd></dl>
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<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;discoveryEventName()</pre>
<div class="block">Gets name of discovery event that triggered this rebalancing event.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Name of discovery event that triggered this rebalancing event.</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/apache/ignite/events/EventAdapter.html#name()"><code>EventAdapter.name()</code></a></dd></dl>
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<h4>discoveryTimestamp</h4>
<pre>public&nbsp;long&nbsp;discoveryTimestamp()</pre>
<div class="block">Gets timestamp of discovery event that caused this rebalancing event.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Timestamp of discovery event that caused this rebalancing event.</dd></dl>
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<h4>shortDisplay</h4>
<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;shortDisplay()</pre>
<div class="block">Gets a shortened version of <code>toString()</code> result. Suitable for humans to read.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../org/apache/ignite/events/Event.html#shortDisplay()">shortDisplay</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/ignite/events/Event.html" title="interface in org.apache.ignite.events">Event</a></code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../org/apache/ignite/events/EventAdapter.html#shortDisplay()">shortDisplay</a></code>&nbsp;in class&nbsp;<code><a href="../../../../org/apache/ignite/events/EventAdapter.html" title="class in org.apache.ignite.events">EventAdapter</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>Shortened version of <code>toString()</code> result.</dd></dl>
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<h4>toString</h4>
<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;toString()</pre>
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<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../org/apache/ignite/events/EventAdapter.html#toString()">toString</a></code>&nbsp;in class&nbsp;<code><a href="../../../../org/apache/ignite/events/EventAdapter.html" title="class in org.apache.ignite.events">EventAdapter</a></code></dd>
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