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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.storm.windowing</a></div> |
| <h1 title="Interface TimestampExtractor" class="title">Interface TimestampExtractor</h1> |
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| <dd><code><a href="../topology/TupleFieldTimestampExtractor.html" title="class in org.apache.storm.topology">TupleFieldTimestampExtractor</a></code></dd> |
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| <div class="type-signature"><span class="modifiers">public interface </span><span class="element-name type-name-label">TimestampExtractor</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">Interface to be implemented for extracting timestamp from a tuple.</div> |
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| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>long</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#extractTimestamp(org.apache.storm.tuple.Tuple)" class="member-name-link">extractTimestamp</a><wbr>(<a href="../tuple/Tuple.html" title="interface in org.apache.storm.tuple">Tuple</a> tuple)</code></div> |
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| <div class="block">Return the tuple timestamp indicating the time when the event happened.</div> |
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| <h2>Method Details</h2> |
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| <section class="detail" id="extractTimestamp(org.apache.storm.tuple.Tuple)"> |
| <h3>extractTimestamp</h3> |
| <div class="member-signature"><span class="return-type">long</span> <span class="element-name">extractTimestamp</span><wbr><span class="parameters">(<a href="../tuple/Tuple.html" title="interface in org.apache.storm.tuple">Tuple</a> tuple)</span></div> |
| <div class="block">Return the tuple timestamp indicating the time when the event happened.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>tuple</code> - the tuple</dd> |
| <dt>Returns:</dt> |
| <dd>the timestamp</dd> |
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