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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.trident.operation</a></div> |
| <h1 title="Interface TridentCollector" class="title">Interface TridentCollector</h1> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="../planner/processor/AppendCollector.html" title="class in org.apache.storm.trident.planner.processor">AppendCollector</a></code>, <code><a href="impl/CaptureCollector.html" title="class in org.apache.storm.trident.operation.impl">CaptureCollector</a></code>, <code><a href="../planner/processor/FreshCollector.html" title="class in org.apache.storm.trident.planner.processor">FreshCollector</a></code>, <code><a href="impl/GroupCollector.html" title="class in org.apache.storm.trident.operation.impl">GroupCollector</a></code></dd> |
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| <div class="type-signature"><span class="modifiers">public interface </span><span class="element-name type-name-label">TridentCollector</span></div> |
| <div class="block">Interface for publishing tuples to a stream and reporting exceptions (to be displayed in Storm UI). |
| |
| <p>Trident components that have the ability to emit tuples to a stream are passed an instance of this interface. |
| |
| <p>For example, to emit a new tuple to a stream, you would do something like the following: |
| |
| <p>```java collector.emit(new Values("a", "b", "c")); ```</div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="../Stream.html" title="class in org.apache.storm.trident"><code>Stream</code></a></li> |
| <li><a href="../../tuple/Values.html" title="class in org.apache.storm.tuple"><code>Values</code></a></li> |
| </ul> |
| </dd> |
| </dl> |
| </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="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="#emit(java.util.List)" class="member-name-link">emit</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>> values)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Emits a tuple to a Stream.</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="#flush()" class="member-name-link">flush</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Flush any buffered tuples (when batching is enabled).</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="#reportError(java.lang.Throwable)" class="member-name-link">reportError</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a> t)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Reports an error.</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="emit(java.util.List)"> |
| <h3>emit</h3> |
| <div class="member-signature"><span class="return-type">void</span> <span class="element-name">emit</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>> values)</span></div> |
| <div class="block">Emits a tuple to a Stream.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>values</code> - a list of values of which the tuple will be composed</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="flush()"> |
| <h3>flush</h3> |
| <div class="member-signature"><span class="return-type">void</span> <span class="element-name">flush</span>()</div> |
| <div class="block">Flush any buffered tuples (when batching is enabled).</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="reportError(java.lang.Throwable)"> |
| <h3>reportError</h3> |
| <div class="member-signature"><span class="return-type">void</span> <span class="element-name">reportError</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a> t)</span></div> |
| <div class="block">Reports an error. The corresponding stack trace will be visible in the Storm UI. |
| |
| <p>Note that calling this method does not alter the processing of a batch. To explicitly fail a batch and trigger |
| a replay, components should throw <a href="../../topology/FailedException.html" title="class in org.apache.storm.topology"><code>FailedException</code></a>.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>t</code> - The instance of the error (Throwable) being reported.</dd> |
| </dl> |
| </section> |
| </li> |
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