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| <h2 title="Class MergeAggregateByKeyProcessor" class="title">Class MergeAggregateByKeyProcessor<K,V,A,R></h2> |
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| <li>org.apache.storm.streams.processors.MergeAggregateByKeyProcessor<K,V,A,R></li> |
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| </dl> |
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| <br> |
| <pre>public class <span class="typeNameLabel">MergeAggregateByKeyProcessor<K,V,A,R></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/storm/streams/processors/BatchProcessor.html" title="interface in org.apache.storm.streams.processors">BatchProcessor</a></pre> |
| <dl> |
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| <dd><a href="../../../../../serialized-form.html#org.apache.storm.streams.processors.MergeAggregateByKeyProcessor">Serialized Form</a></dd> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/storm/streams/operations/CombinerAggregator.html" title="interface in org.apache.storm.streams.operations">CombinerAggregator</a><<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">V</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">A</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">R</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html#aggregator">aggregator</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/storm/streams/processors/ProcessorContext.html" title="interface in org.apache.storm.streams.processors">ProcessorContext</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html#context">context</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">K</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">A</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html#state">state</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html#MergeAggregateByKeyProcessor-org.apache.storm.streams.operations.CombinerAggregator-">MergeAggregateByKeyProcessor</a></span>(<a href="../../../../../org/apache/storm/streams/operations/CombinerAggregator.html" title="interface in org.apache.storm.streams.operations">CombinerAggregator</a><<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">V</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">A</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">R</a>> aggregator)</code> </td> |
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| <h3>Method Summary</h3> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html#execute-org.apache.storm.streams.Pair-">execute</a></span>(<a href="../../../../../org/apache/storm/streams/Pair.html" title="class in org.apache.storm.streams">Pair</a><<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">K</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">A</a>> input)</code> |
| <div class="block">Execute some operation on the input value.</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/storm/streams/processors/MergeAggregateByKeyProcessor.html#execute-T-java.lang.String-">execute</a></span>(T input, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> streamId)</code> |
| <div class="block">Executes some operations on the input and possibly emits some results.</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/storm/streams/processors/MergeAggregateByKeyProcessor.html#finish--">finish</a></span>()</code> |
| <div class="block">This is triggered to signal the end of the current batch of values.</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/storm/streams/processors/MergeAggregateByKeyProcessor.html#init-org.apache.storm.streams.processors.ProcessorContext-">init</a></span>(<a href="../../../../../org/apache/storm/streams/processors/ProcessorContext.html" title="interface in org.apache.storm.streams.processors">ProcessorContext</a> context)</code> |
| <div class="block">Initializes the processor.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>protected <R> void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html#mayBeForwardAggUpdate-java.util.function.Supplier-">mayBeForwardAggUpdate</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function">Supplier</a><R> result)</code> |
| <div class="block">Forwards the result update to downstream processors.</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/storm/streams/processors/MergeAggregateByKeyProcessor.html#punctuate-java.lang.String-">punctuate</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> stream)</code> |
| <div class="block">Punctuation marks end of a batch which can be used to compute and pass the results of one stage in the pipeline to the next.</div> |
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| <h3>Methods inherited from class java.lang.<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></h3> |
| <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> |
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| <h4>aggregator</h4> |
| <pre>protected final <a href="../../../../../org/apache/storm/streams/operations/CombinerAggregator.html" title="interface in org.apache.storm.streams.operations">CombinerAggregator</a><<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">V</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">A</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">R</a>> aggregator</pre> |
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| <h4>state</h4> |
| <pre>protected final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">K</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">A</a>> state</pre> |
| </li> |
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| <h4>context</h4> |
| <pre>protected <a href="../../../../../org/apache/storm/streams/processors/ProcessorContext.html" title="interface in org.apache.storm.streams.processors">ProcessorContext</a> context</pre> |
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| <h4>MergeAggregateByKeyProcessor</h4> |
| <pre>public MergeAggregateByKeyProcessor(<a href="../../../../../org/apache/storm/streams/operations/CombinerAggregator.html" title="interface in org.apache.storm.streams.operations">CombinerAggregator</a><<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">V</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">A</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">R</a>> aggregator)</pre> |
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| <a name="execute-org.apache.storm.streams.Pair-"> |
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| <h4>execute</h4> |
| <pre>public void execute(<a href="../../../../../org/apache/storm/streams/Pair.html" title="class in org.apache.storm.streams">Pair</a><<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">K</a>,<a href="../../../../../org/apache/storm/streams/processors/MergeAggregateByKeyProcessor.html" title="type parameter in MergeAggregateByKeyProcessor">A</a>> input)</pre> |
| <div class="block">Execute some operation on the input value. Sub classes can override this when then don't care about the source stream from where the |
| input is received.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>input</code> - the input</dd> |
| </dl> |
| </li> |
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| <h4>finish</h4> |
| <pre>public void finish()</pre> |
| <div class="block">This is triggered to signal the end of the current batch of values. Sub classes can override this to emit the result of a batch of |
| values, for e.g. to emit the result of an aggregate or join operation on a batch of values. If a processor does per-value operation |
| like filter, map etc, they can choose to ignore this.</div> |
| </li> |
| </ul> |
| <a name="init-org.apache.storm.streams.processors.ProcessorContext-"> |
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| <h4>init</h4> |
| <pre>public void init(<a href="../../../../../org/apache/storm/streams/processors/ProcessorContext.html" title="interface in org.apache.storm.streams.processors">ProcessorContext</a> context)</pre> |
| <div class="block"><p>Initializes the processor. This is typically invoked from the underlying storm bolt’s prepare method.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/streams/processors/Processor.html#init-org.apache.storm.streams.processors.ProcessorContext-">init</a></code> in interface <code><a href="../../../../../org/apache/storm/streams/processors/Processor.html" title="interface in org.apache.storm.streams.processors">Processor</a><T></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - the processor context</dd> |
| </dl> |
| </li> |
| </ul> |
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| <pre>public void execute(T input, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> streamId)</pre> |
| <div class="block"><p>Executes some operations on the input and possibly emits some results.</p> Processors that do not care about the source stream should override <code>BaseProcessor.execute(Object)</code> instead.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/streams/processors/Processor.html#execute-T-java.lang.String-">execute</a></code> in interface <code><a href="../../../../../org/apache/storm/streams/processors/Processor.html" title="interface in org.apache.storm.streams.processors">Processor</a><T></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>input</code> - the input to be processed</dd> |
| <dd><code>streamId</code> - the source stream id from where the input is received</dd> |
| </dl> |
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| <h4>punctuate</h4> |
| <pre>public void punctuate(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> stream)</pre> |
| <div class="block"><p>Punctuation marks end of a batch which can be used to compute and pass the results of one stage in the pipeline to the next. For e.g. emit the results of an aggregation.</p></div> |
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| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/streams/processors/Processor.html#punctuate-java.lang.String-">punctuate</a></code> in interface <code><a href="../../../../../org/apache/storm/streams/processors/Processor.html" title="interface in org.apache.storm.streams.processors">Processor</a><T></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>stream</code> - the stream id on which the punctuation arrived</dd> |
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| <pre>protected final <R> void mayBeForwardAggUpdate(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function">Supplier</a><R> result)</pre> |
| <div class="block">Forwards the result update to downstream processors. Processors that operate on a batch of tuples, like aggregation, join etc can use |
| this to emit the partial results on each input if they are operating in non-windowed mode.</div> |
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