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| <li>Summary: </li> |
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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.heron.api.windowing.triggers</a></div> |
| <h2 title="Class CountTriggerPolicy" class="title">Class CountTriggerPolicy<T extends java.io.Serializable></h2> |
| </div> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="AbstractBaseTriggerPolicy.html" title="class in org.apache.heron.api.windowing.triggers">org.apache.heron.api.windowing.triggers.AbstractBaseTriggerPolicy</a><T,​java.lang.Integer></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.heron.api.windowing.triggers.CountTriggerPolicy<T></li> |
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| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type of event tracked by this policy.</dd> |
| </dl> |
| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="../TriggerPolicy.html" title="interface in org.apache.heron.api.windowing">TriggerPolicy</a><T,​java.lang.Integer></code></dd> |
| </dl> |
| <hr> |
| <pre>public class <span class="typeNameLabel">CountTriggerPolicy<T extends java.io.Serializable></span> |
| extends <a href="AbstractBaseTriggerPolicy.html" title="class in org.apache.heron.api.windowing.triggers">AbstractBaseTriggerPolicy</a><T,​java.lang.Integer></pre> |
| <div class="block">A trigger that tracks event counts and calls back <a href="../TriggerHandler.html#onTrigger()"><code>TriggerHandler.onTrigger()</code></a> |
| when the count threshold is hit.</div> |
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| <h3>Fields inherited from class org.apache.heron.api.windowing.triggers.<a href="AbstractBaseTriggerPolicy.html" title="class in org.apache.heron.api.windowing.triggers">AbstractBaseTriggerPolicy</a></h3> |
| <code><a href="AbstractBaseTriggerPolicy.html#evictionPolicy">evictionPolicy</a>, <a href="AbstractBaseTriggerPolicy.html#handler">handler</a>, <a href="AbstractBaseTriggerPolicy.html#started">started</a>, <a href="AbstractBaseTriggerPolicy.html#topoConf">topoConf</a>, <a href="AbstractBaseTriggerPolicy.html#windowManager">windowManager</a></code></li> |
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| <h3>Constructor Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(int)">CountTriggerPolicy</a></span>​(int count)</code></th> |
| <td class="colLast"> </td> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>java.lang.Integer</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getState()">getState</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Return runtime state to be checkpointed by the framework for restoring the trigger policy |
| in case of failures.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reset()">reset</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">resets the trigger policy.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#restoreState(java.lang.Integer)">restoreState</a></span>​(java.lang.Integer state)</code></th> |
| <td class="colLast"> |
| <div class="block">Restore the trigger policy from the state that was earlier checkpointed by the framework.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#shutdown()">shutdown</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Any clean up could be handled here.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>java.lang.String</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString()">toString</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#track(org.apache.heron.api.windowing.Event)">track</a></span>​(<a href="../Event.html" title="interface in org.apache.heron.api.windowing">Event</a><<a href="CountTriggerPolicy.html" title="type parameter in CountTriggerPolicy">T</a>> event)</code></th> |
| <td class="colLast"> |
| <div class="block">Tracks the event and could use this to invoke the trigger.</div> |
| </td> |
| </tr> |
| </table> |
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| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.heron.api.windowing.triggers.<a href="AbstractBaseTriggerPolicy.html" title="class in org.apache.heron.api.windowing.triggers">AbstractBaseTriggerPolicy</a></h3> |
| <code><a href="AbstractBaseTriggerPolicy.html#setEvictionPolicy(org.apache.heron.api.windowing.EvictionPolicy)">setEvictionPolicy</a>, <a href="AbstractBaseTriggerPolicy.html#setTopologyConfig(java.util.Map)">setTopologyConfig</a>, <a href="AbstractBaseTriggerPolicy.html#setTriggerHandler(org.apache.heron.api.windowing.TriggerHandler)">setTriggerHandler</a>, <a href="AbstractBaseTriggerPolicy.html#setWindowManager(org.apache.heron.api.windowing.WindowManager)">setWindowManager</a>, <a href="AbstractBaseTriggerPolicy.html#start()">start</a></code></li> |
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| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>CountTriggerPolicy</h4> |
| <pre>public CountTriggerPolicy​(int count)</pre> |
| </li> |
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| </section> |
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| <a id="track(org.apache.heron.api.windowing.Event)"> |
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| <h4>track</h4> |
| <pre class="methodSignature">public void track​(<a href="../Event.html" title="interface in org.apache.heron.api.windowing">Event</a><<a href="CountTriggerPolicy.html" title="type parameter in CountTriggerPolicy">T</a>> event)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../TriggerPolicy.html#track(org.apache.heron.api.windowing.Event)">TriggerPolicy</a></code></span></div> |
| <div class="block">Tracks the event and could use this to invoke the trigger.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>event</code> - the input event</dd> |
| </dl> |
| </li> |
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| <a id="reset()"> |
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| <h4>reset</h4> |
| <pre class="methodSignature">public void reset()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../TriggerPolicy.html#reset()">TriggerPolicy</a></code></span></div> |
| <div class="block">resets the trigger policy.</div> |
| </li> |
| </ul> |
| <a id="shutdown()"> |
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| <li class="blockList"> |
| <h4>shutdown</h4> |
| <pre class="methodSignature">public void shutdown()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../TriggerPolicy.html#shutdown()">TriggerPolicy</a></code></span></div> |
| <div class="block">Any clean up could be handled here.</div> |
| </li> |
| </ul> |
| <a id="getState()"> |
| <!-- --> |
| </a> |
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| <h4>getState</h4> |
| <pre class="methodSignature">public java.lang.Integer getState()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../TriggerPolicy.html#getState()">TriggerPolicy</a></code></span></div> |
| <div class="block">Return runtime state to be checkpointed by the framework for restoring the trigger policy |
| in case of failures.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the state</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="restoreState(java.lang.Integer)"> |
| <!-- --> |
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| <h4>restoreState</h4> |
| <pre class="methodSignature">public void restoreState​(java.lang.Integer state)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../TriggerPolicy.html#restoreState(S)">TriggerPolicy</a></code></span></div> |
| <div class="block">Restore the trigger policy from the state that was earlier checkpointed by the framework.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>state</code> - the state</dd> |
| </dl> |
| </li> |
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| <h4>toString</h4> |
| <pre class="methodSignature">public java.lang.String toString()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>toString</code> in class <code>java.lang.Object</code></dd> |
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