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| <li>Summary: </li> |
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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.storm.streams.processors</a></div> |
| <h1 title="Interface Processor" class="title">Interface Processor<T></h1> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>Type Parameters:</dt> |
| <dd><code>T</code> - the type of the input that is processed</dd> |
| </dl> |
| <dl class="notes"> |
| <dt>All Superinterfaces:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></code></dd> |
| </dl> |
| <dl class="notes"> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="AggregateByKeyProcessor.html" title="class in org.apache.storm.streams.processors">AggregateByKeyProcessor</a></code>, <code><a href="AggregateProcessor.html" title="class in org.apache.storm.streams.processors">AggregateProcessor</a></code>, <code><a href="BranchProcessor.html" title="class in org.apache.storm.streams.processors">BranchProcessor</a></code>, <code><a href="CoGroupByKeyProcessor.html" title="class in org.apache.storm.streams.processors">CoGroupByKeyProcessor</a></code>, <code><a href="FilterProcessor.html" title="class in org.apache.storm.streams.processors">FilterProcessor</a></code>, <code><a href="FlatMapProcessor.html" title="class in org.apache.storm.streams.processors">FlatMapProcessor</a></code>, <code><a href="FlatMapValuesProcessor.html" title="class in org.apache.storm.streams.processors">FlatMapValuesProcessor</a></code>, <code><a href="ForEachProcessor.html" title="class in org.apache.storm.streams.processors">ForEachProcessor</a></code>, <code><a href="JoinProcessor.html" title="class in org.apache.storm.streams.processors">JoinProcessor</a></code>, <code><a href="MapProcessor.html" title="class in org.apache.storm.streams.processors">MapProcessor</a></code>, <code><a href="MapValuesProcessor.html" title="class in org.apache.storm.streams.processors">MapValuesProcessor</a></code>, <code><a href="MergeAggregateByKeyProcessor.html" title="class in org.apache.storm.streams.processors">MergeAggregateByKeyProcessor</a></code>, <code><a href="MergeAggregateProcessor.html" title="class in org.apache.storm.streams.processors">MergeAggregateProcessor</a></code>, <code><a href="PeekProcessor.html" title="class in org.apache.storm.streams.processors">PeekProcessor</a></code>, <code><a href="ReduceByKeyProcessor.html" title="class in org.apache.storm.streams.processors">ReduceByKeyProcessor</a></code>, <code><a href="ReduceProcessor.html" title="class in org.apache.storm.streams.processors">ReduceProcessor</a></code>, <code><a href="StateQueryProcessor.html" title="class in org.apache.storm.streams.processors">StateQueryProcessor</a></code>, <code><a href="UpdateStateByKeyProcessor.html" title="class in org.apache.storm.streams.processors">UpdateStateByKeyProcessor</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="annotations"><a href="../../annotation/InterfaceStability.Unstable.html" title="annotation in org.apache.storm.annotation">@Unstable</a> |
| </span><span class="modifiers">public interface </span><span class="element-name type-name-label">Processor<T></span><span class="extends-implements"> |
| extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></span></div> |
| <div class="block">A processor processes a stream of elements and produces some result.</div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
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| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#execute(T,java.lang.String)" class="member-name-link">execute</a><wbr>(<a href="Processor.html" title="type parameter in Processor">T</a> input, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> streamId)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Executes some operations on the input and possibly emits some results.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>void</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#init(org.apache.storm.streams.processors.ProcessorContext)" class="member-name-link">init</a><wbr>(<a href="ProcessorContext.html" title="interface in org.apache.storm.streams.processors">ProcessorContext</a> context)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Initializes the processor.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#punctuate(java.lang.String)" class="member-name-link">punctuate</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> stream)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <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> |
| </div> |
| </div> |
| </div> |
| </div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="init(org.apache.storm.streams.processors.ProcessorContext)"> |
| <h3>init</h3> |
| <div class="member-signature"><span class="return-type">void</span> <span class="element-name">init</span><wbr><span class="parameters">(<a href="ProcessorContext.html" title="interface in org.apache.storm.streams.processors">ProcessorContext</a> context)</span></div> |
| <div class="block">Initializes the processor. This is typically invoked from the underlying storm bolt's prepare method.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>context</code> - the processor context</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="execute(T,java.lang.String)"> |
| <h3 id="execute(java.lang.Object,java.lang.String)">execute</h3> |
| <div class="member-signature"><span class="return-type">void</span> <span class="element-name">execute</span><wbr><span class="parameters">(<a href="Processor.html" title="type parameter in Processor">T</a> input, |
| <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> streamId)</span></div> |
| <div class="block">Executes some operations on the input and possibly emits some results.</div> |
| <dl class="notes"> |
| <dt>Parameters:</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> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="punctuate(java.lang.String)"> |
| <h3>punctuate</h3> |
| <div class="member-signature"><span class="return-type">void</span> <span class="element-name">punctuate</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> stream)</span></div> |
| <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. For e.g. |
| emit the results of an aggregation.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>stream</code> - the stream id on which the punctuation arrived</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
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