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| <h2 title="Class TupleFieldTimestampExtractor" class="title">Class TupleFieldTimestampExtractor</h2> |
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| <pre>public final class <span class="typeNameLabel">TupleFieldTimestampExtractor</span> |
| extends java.lang.Object |
| implements <a href="TimestampExtractor.html" title="interface in org.apache.heron.api.windowing">TimestampExtractor</a></pre> |
| <div class="block">A <a href="TimestampExtractor.html" title="interface in org.apache.heron.api.windowing"><code>TimestampExtractor</code></a> that extracts timestamp from a specific field in the tuple.</div> |
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| <td class="colFirst"><code>long</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#extractTimestamp(org.apache.heron.api.tuple.Tuple)">extractTimestamp</a></span>​(<a href="../tuple/Tuple.html" title="interface in org.apache.heron.api.tuple">Tuple</a> tuple)</code></th> |
| <td class="colLast"> |
| <div class="block">Return the tuple timestamp indicating the time when the event happened.</div> |
| </td> |
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| <td class="colFirst"><code>static <a href="TupleFieldTimestampExtractor.html" title="class in org.apache.heron.api.windowing">TupleFieldTimestampExtractor</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#of(java.lang.String)">of</a></span>​(java.lang.String fieldName)</code></th> |
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| <td class="colFirst"><code>java.lang.String</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString()">toString</a></span>()</code></th> |
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| <h4>extractTimestamp</h4> |
| <pre class="methodSignature">public long extractTimestamp​(<a href="../tuple/Tuple.html" title="interface in org.apache.heron.api.tuple">Tuple</a> tuple)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="TimestampExtractor.html#extractTimestamp(org.apache.heron.api.tuple.Tuple)">TimestampExtractor</a></code></span></div> |
| <div class="block">Return the tuple timestamp indicating the time when the event happened.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="TimestampExtractor.html#extractTimestamp(org.apache.heron.api.tuple.Tuple)">extractTimestamp</a></code> in interface <code><a href="TimestampExtractor.html" title="interface in org.apache.heron.api.windowing">TimestampExtractor</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>tuple</code> - the tuple</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the timestamp</dd> |
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| <pre class="methodSignature">public static <a href="TupleFieldTimestampExtractor.html" title="class in org.apache.heron.api.windowing">TupleFieldTimestampExtractor</a> of​(java.lang.String fieldName)</pre> |
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| <h4>toString</h4> |
| <pre class="methodSignature">public java.lang.String toString()</pre> |
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