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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.heron.streamlet.impl.operators</a></div>
<h2 title="Class StreamletWindowOperator" class="title">Class StreamletWindowOperator&lt;R,&#8203;T&gt;</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
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<ul class="inheritance">
<li><a href="../../../api/bolt/BaseWindowedBolt.html" title="class in org.apache.heron.api.bolt">org.apache.heron.api.bolt.BaseWindowedBolt</a></li>
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<ul class="inheritance">
<li>org.apache.heron.streamlet.impl.operators.StreamletWindowOperator&lt;R,&#8203;T&gt;</li>
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<dt>All Implemented Interfaces:</dt>
<dd><code>java.io.Serializable</code>, <code><a href="../../../api/bolt/IWindowedBolt.html" title="interface in org.apache.heron.api.bolt">IWindowedBolt</a></code>, <code><a href="../../../api/topology/IComponent.html" title="interface in org.apache.heron.api.topology">IComponent</a></code>, <code><a href="../../IStreamletOperator.html" title="interface in org.apache.heron.streamlet">IStreamletOperator</a>&lt;R,&#8203;T&gt;</code>, <code><a href="../../IStreamletWindowOperator.html" title="interface in org.apache.heron.streamlet">IStreamletWindowOperator</a>&lt;R,&#8203;T&gt;</code></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><code><a href="GeneralReduceByKeyAndWindowOperator.html" title="class in org.apache.heron.streamlet.impl.operators">GeneralReduceByKeyAndWindowOperator</a></code>, <code><a href="JoinOperator.html" title="class in org.apache.heron.streamlet.impl.operators">JoinOperator</a></code>, <code><a href="ReduceByKeyAndWindowOperator.html" title="class in org.apache.heron.streamlet.impl.operators">ReduceByKeyAndWindowOperator</a></code></dd>
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<hr>
<pre>public abstract class <span class="typeNameLabel">StreamletWindowOperator&lt;R,&#8203;T&gt;</span>
extends <a href="../../../api/bolt/BaseWindowedBolt.html" title="class in org.apache.heron.api.bolt">BaseWindowedBolt</a>
implements <a href="../../IStreamletWindowOperator.html" title="interface in org.apache.heron.streamlet">IStreamletWindowOperator</a>&lt;R,&#8203;T&gt;</pre>
<div class="block">The Bolt interface that other windowed operators of the streamlet packages extend.
The only common stuff amongst all of them is the output streams</div>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../serialized-form.html#org.apache.heron.streamlet.impl.operators.StreamletWindowOperator">Serialized Form</a></dd>
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<code><a href="../../../api/bolt/BaseWindowedBolt.Count.html" title="class in org.apache.heron.api.bolt">BaseWindowedBolt.Count</a></code></li>
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<td class="colFirst"><code>protected <a href="../../../api/bolt/OutputCollector.html" title="class in org.apache.heron.api.bolt">OutputCollector</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#collector">collector</a></span></code></th>
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<code><a href="../../../api/bolt/BaseWindowedBolt.html#timestampExtractor">timestampExtractor</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#windowConfiguration">windowConfiguration</a></code></li>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">StreamletWindowOperator</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#declareOutputFields(org.apache.heron.api.topology.OutputFieldsDeclarer)">declareOutputFields</a></span>&#8203;(<a href="../../../api/topology/OutputFieldsDeclarer.html" title="interface in org.apache.heron.api.topology">OutputFieldsDeclarer</a>&nbsp;outputFieldsDeclarer)</code></th>
<td class="colLast">
<div class="block">The operators implementing streamlet functionality have some properties.</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="#prepare(java.util.Map,org.apache.heron.api.topology.TopologyContext,org.apache.heron.api.bolt.OutputCollector)">prepare</a></span>&#8203;(java.util.Map&lt;java.lang.String,&#8203;java.lang.Object&gt;&nbsp;map,
<a href="../../../api/topology/TopologyContext.html" title="interface in org.apache.heron.api.topology">TopologyContext</a>&nbsp;topologyContext,
<a href="../../../api/bolt/OutputCollector.html" title="class in org.apache.heron.api.bolt">OutputCollector</a>&nbsp;outputCollector)</code></th>
<td class="colLast">
<div class="block">This is similar to the
<a href="../../../api/bolt/IBolt.html#prepare(java.util.Map,org.apache.heron.api.topology.TopologyContext,org.apache.heron.api.bolt.OutputCollector)"><code>IBolt.prepare(Map, TopologyContext, OutputCollector)</code></a>
except
that while emitting, the tuples are automatically anchored to the tuples in the inputWindow.</div>
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<h3>Methods inherited from class&nbsp;org.apache.heron.api.bolt.<a href="../../../api/bolt/BaseWindowedBolt.html" title="class in org.apache.heron.api.bolt">BaseWindowedBolt</a></h3>
<code><a href="../../../api/bolt/BaseWindowedBolt.html#cleanup()">cleanup</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#getComponentConfiguration()">getComponentConfiguration</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#getTimestampExtractor()">getTimestampExtractor</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withCustomEvictor(org.apache.heron.api.windowing.EvictionPolicy)">withCustomEvictor</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withCustomTrigger(org.apache.heron.api.windowing.TriggerPolicy)">withCustomTrigger</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withLag(java.time.Duration)">withLag</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withLateTupleStream(java.lang.String)">withLateTupleStream</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withTimestampExtractor(org.apache.heron.api.windowing.TimestampExtractor)">withTimestampExtractor</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withTimestampField(java.lang.String)">withTimestampField</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withTumblingWindow(java.time.Duration)">withTumblingWindow</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withTumblingWindow(org.apache.heron.api.bolt.BaseWindowedBolt.Count)">withTumblingWindow</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withWatermarkInterval(java.time.Duration)">withWatermarkInterval</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withWindow(java.time.Duration)">withWindow</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withWindow(java.time.Duration,java.time.Duration)">withWindow</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withWindow(java.time.Duration,org.apache.heron.api.bolt.BaseWindowedBolt.Count)">withWindow</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withWindow(org.apache.heron.api.bolt.BaseWindowedBolt.Count)">withWindow</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withWindow(org.apache.heron.api.bolt.BaseWindowedBolt.Count,java.time.Duration)">withWindow</a>, <a href="../../../api/bolt/BaseWindowedBolt.html#withWindow(org.apache.heron.api.bolt.BaseWindowedBolt.Count,org.apache.heron.api.bolt.BaseWindowedBolt.Count)">withWindow</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h3>Methods inherited from interface&nbsp;org.apache.heron.api.topology.<a href="../../../api/topology/IComponent.html" title="interface in org.apache.heron.api.topology">IComponent</a></h3>
<code><a href="../../../api/topology/IComponent.html#getComponentConfiguration()">getComponentConfiguration</a></code></li>
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<h3>Methods inherited from interface&nbsp;org.apache.heron.api.bolt.<a href="../../../api/bolt/IWindowedBolt.html" title="interface in org.apache.heron.api.bolt">IWindowedBolt</a></h3>
<code><a href="../../../api/bolt/IWindowedBolt.html#cleanup()">cleanup</a>, <a href="../../../api/bolt/IWindowedBolt.html#execute(org.apache.heron.api.windowing.TupleWindow)">execute</a>, <a href="../../../api/bolt/IWindowedBolt.html#getTimestampExtractor()">getTimestampExtractor</a></code></li>
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<h3>Field Detail</h3>
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<h4>collector</h4>
<pre>protected&nbsp;<a href="../../../api/bolt/OutputCollector.html" title="class in org.apache.heron.api.bolt">OutputCollector</a> collector</pre>
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<h4>StreamletWindowOperator</h4>
<pre>public&nbsp;StreamletWindowOperator()</pre>
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<a id="prepare(java.util.Map,org.apache.heron.api.topology.TopologyContext,org.apache.heron.api.bolt.OutputCollector)">
<!-- -->
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<ul class="blockList">
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<h4>prepare</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;prepare&#8203;(java.util.Map&lt;java.lang.String,&#8203;java.lang.Object&gt;&nbsp;map,
<a href="../../../api/topology/TopologyContext.html" title="interface in org.apache.heron.api.topology">TopologyContext</a>&nbsp;topologyContext,
<a href="../../../api/bolt/OutputCollector.html" title="class in org.apache.heron.api.bolt">OutputCollector</a>&nbsp;outputCollector)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../api/bolt/IWindowedBolt.html#prepare(java.util.Map,org.apache.heron.api.topology.TopologyContext,org.apache.heron.api.bolt.OutputCollector)">IWindowedBolt</a></code></span></div>
<div class="block">This is similar to the
<a href="../../../api/bolt/IBolt.html#prepare(java.util.Map,org.apache.heron.api.topology.TopologyContext,org.apache.heron.api.bolt.OutputCollector)"><code>IBolt.prepare(Map, TopologyContext, OutputCollector)</code></a>
except
that while emitting, the tuples are automatically anchored to the tuples in the inputWindow.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../api/bolt/IWindowedBolt.html#prepare(java.util.Map,org.apache.heron.api.topology.TopologyContext,org.apache.heron.api.bolt.OutputCollector)">prepare</a></code>&nbsp;in interface&nbsp;<code><a href="../../../api/bolt/IWindowedBolt.html" title="interface in org.apache.heron.api.bolt">IWindowedBolt</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../api/bolt/BaseWindowedBolt.html#prepare(java.util.Map,org.apache.heron.api.topology.TopologyContext,org.apache.heron.api.bolt.OutputCollector)">prepare</a></code>&nbsp;in class&nbsp;<code><a href="../../../api/bolt/BaseWindowedBolt.html" title="class in org.apache.heron.api.bolt">BaseWindowedBolt</a></code></dd>
</dl>
</li>
</ul>
<a id="declareOutputFields(org.apache.heron.api.topology.OutputFieldsDeclarer)">
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<h4>declareOutputFields</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;declareOutputFields&#8203;(<a href="../../../api/topology/OutputFieldsDeclarer.html" title="interface in org.apache.heron.api.topology">OutputFieldsDeclarer</a>&nbsp;outputFieldsDeclarer)</pre>
<div class="block">The operators implementing streamlet functionality have some properties.
1. They all output only one stream
2. They should be able to consume each other's output
This imply that the output stream should be named same for all of them.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../api/topology/IComponent.html#declareOutputFields(org.apache.heron.api.topology.OutputFieldsDeclarer)">declareOutputFields</a></code>&nbsp;in interface&nbsp;<code><a href="../../../api/topology/IComponent.html" title="interface in org.apache.heron.api.topology">IComponent</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../api/bolt/BaseWindowedBolt.html#declareOutputFields(org.apache.heron.api.topology.OutputFieldsDeclarer)">declareOutputFields</a></code>&nbsp;in class&nbsp;<code><a href="../../../api/bolt/BaseWindowedBolt.html" title="class in org.apache.heron.api.bolt">BaseWindowedBolt</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>outputFieldsDeclarer</code> - this is used to declare output stream ids, output fields, and whether or not each output stream is a direct stream</dd>
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