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| <h2 title="Interface TridentCollector" class="title">Interface TridentCollector</h2> |
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| <dd><a href="../../../../../org/apache/storm/trident/planner/processor/AppendCollector.html" title="class in org.apache.storm.trident.planner.processor">AppendCollector</a>, <a href="../../../../../org/apache/storm/trident/operation/impl/CaptureCollector.html" title="class in org.apache.storm.trident.operation.impl">CaptureCollector</a>, <a href="../../../../../org/apache/storm/trident/planner/processor/FreshCollector.html" title="class in org.apache.storm.trident.planner.processor">FreshCollector</a>, <a href="../../../../../org/apache/storm/trident/operation/impl/GroupCollector.html" title="class in org.apache.storm.trident.operation.impl">GroupCollector</a></dd> |
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| <pre>public interface <span class="typeNameLabel">TridentCollector</span></pre> |
| <div class="block"><p>Interface for publishing tuples to a stream and reporting exceptions (to be displayed in Storm UI).</p><p><p>Trident components that have the ability to emit tuples to a stream are passed an instance of this interface.</p><p><p>For example, to emit a new tuple to a stream, you would do something like the following:</p><p><p><code>java collector.emit(new Values("a", "b", "c"));</code></p></div> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/trident/operation/TridentCollector.html#emit-java.util.List-">emit</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<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>> values)</code> |
| <div class="block">Emits a tuple to a Stream.</div> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/trident/operation/TridentCollector.html#flush--">flush</a></span>()</code> |
| <div class="block">Flush any buffered tuples (when batching is enabled).</div> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/trident/operation/TridentCollector.html#reportError-java.lang.Throwable-">reportError</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> t)</code> |
| <div class="block">Reports an error.</div> |
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| <h4>emit</h4> |
| <pre>void emit(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<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>> values)</pre> |
| <div class="block"><p>Emits a tuple to a Stream.</p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>values</code> - a list of values of which the tuple will be composed</dd> |
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| <pre>void flush()</pre> |
| <div class="block"><p>Flush any buffered tuples (when batching is enabled).</p></div> |
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| <h4>reportError</h4> |
| <pre>void reportError(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> t)</pre> |
| <div class="block"><p>Reports an error. The corresponding stack trace will be visible in the Storm UI.</p><p><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="../../../../../org/apache/storm/topology/FailedException.html" title="class in org.apache.storm.topology"><code>FailedException</code></a>.</p></div> |
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| <dd><code>t</code> - The instance of the error (Throwable) being reported.</dd> |
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