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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.heron.api.windowing</a></div> |
| <h2 title="Interface Event" class="title">Interface Event<T extends java.io.Serializable></h2> |
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| <dd><code>java.io.Serializable</code></dd> |
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| <dd><code><a href="EventImpl.html" title="class in org.apache.heron.api.windowing">EventImpl</a></code>, <code><a href="WaterMarkEvent.html" title="class in org.apache.heron.api.windowing">WaterMarkEvent</a></code></dd> |
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| <pre>public interface <span class="typeNameLabel">Event<T extends java.io.Serializable></span> |
| extends java.io.Serializable</pre> |
| <div class="block">An event is a wrapper object that gets stored in the window.</div> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="Event.html" title="type parameter in Event">T</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get()">get</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns the wrapped object, E.g.</div> |
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| <td class="colFirst"><code>long</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTimestamp()">getTimestamp</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">The event timestamp in millis.</div> |
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| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isWatermark()">isWatermark</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">If this is a watermark event or not.</div> |
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| <h4>getTimestamp</h4> |
| <pre class="methodSignature">long getTimestamp()</pre> |
| <div class="block">The event timestamp in millis. This could be the time |
| when the source generated the tuple or the time |
| when the tuple was received by a bolt.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the event timestamp in milliseconds.</dd> |
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| <h4>get</h4> |
| <pre class="methodSignature"><a href="Event.html" title="type parameter in Event">T</a> get()</pre> |
| <div class="block">Returns the wrapped object, E.g. a tuple</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the wrapped object.</dd> |
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| <h4>isWatermark</h4> |
| <pre class="methodSignature">boolean isWatermark()</pre> |
| <div class="block">If this is a watermark event or not. Watermark events are used |
| for tracking time while processing event based ts.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if this is a watermark event</dd> |
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