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| <h1 title="Package" class="title">Package org.apache.heron.api.windowing</h1> |
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| <th class="colFirst" scope="row"><a href="Event.html" title="interface in org.apache.heron.api.windowing">Event</a><T extends java.io.Serializable></th> |
| <td class="colLast"> |
| <div class="block">An event is a wrapper object that gets stored in the window.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="EvictionContext.html" title="interface in org.apache.heron.api.windowing">EvictionContext</a></th> |
| <td class="colLast"> |
| <div class="block">Context information that can be used by the eviction policy</div> |
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| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="EvictionPolicy.html" title="interface in org.apache.heron.api.windowing">EvictionPolicy</a><T extends java.io.Serializable,​S></th> |
| <td class="colLast"> |
| <div class="block">Eviction policy tracks events and decides whether |
| an event should be evicted from the window or not.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="TimestampExtractor.html" title="interface in org.apache.heron.api.windowing">TimestampExtractor</a></th> |
| <td class="colLast"> |
| <div class="block">Interface to be implemented for extracting timestamp from a tuple.</div> |
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| <th class="colFirst" scope="row"><a href="TriggerHandler.html" title="interface in org.apache.heron.api.windowing">TriggerHandler</a></th> |
| <td class="colLast"> |
| <div class="block">The callback fired by <a href="TriggerPolicy.html" title="interface in org.apache.heron.api.windowing"><code>TriggerPolicy</code></a> when the trigger |
| condition is satisfied.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="TriggerPolicy.html" title="interface in org.apache.heron.api.windowing">TriggerPolicy</a><T extends java.io.Serializable,​S></th> |
| <td class="colLast"> |
| <div class="block">Triggers the window calculations based on the policy.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="TupleWindow.html" title="interface in org.apache.heron.api.windowing">TupleWindow</a></th> |
| <td class="colLast"> |
| <div class="block">A <a href="Window.html" title="interface in org.apache.heron.api.windowing"><code>Window</code></a> that contains <a href="../tuple/Tuple.html" title="interface in org.apache.heron.api.tuple"><code>Tuple</code></a> objects.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="Window.html" title="interface in org.apache.heron.api.windowing">Window</a><T></th> |
| <td class="colLast"> |
| <div class="block">A view of events in a sliding window.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="WindowLifecycleListener.html" title="interface in org.apache.heron.api.windowing">WindowLifecycleListener</a><T></th> |
| <td class="colLast"> |
| <div class="block">A callback for expiry, activation of events tracked by the <a href="WindowManager.html" title="class in org.apache.heron.api.windowing"><code>WindowManager</code></a></div> |
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| <th class="colLast" scope="col">Description</th> |
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| <th class="colFirst" scope="row"><a href="DefaultEvictionContext.html" title="class in org.apache.heron.api.windowing">DefaultEvictionContext</a></th> |
| <td class="colLast"> </td> |
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| <th class="colFirst" scope="row"><a href="EventImpl.html" title="class in org.apache.heron.api.windowing">EventImpl</a><T extends java.io.Serializable></th> |
| <td class="colLast"> </td> |
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| <th class="colFirst" scope="row"><a href="TupleFieldTimestampExtractor.html" title="class in org.apache.heron.api.windowing">TupleFieldTimestampExtractor</a></th> |
| <td class="colLast"> |
| <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> |
| </td> |
| </tr> |
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| <th class="colFirst" scope="row"><a href="TupleWindowImpl.html" title="class in org.apache.heron.api.windowing">TupleWindowImpl</a></th> |
| <td class="colLast"> |
| <div class="block">Holds the expired, new and current tuples in a window.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="WaterMarkEvent.html" title="class in org.apache.heron.api.windowing">WaterMarkEvent</a><T extends java.io.Serializable></th> |
| <td class="colLast"> |
| <div class="block">Watermark event used for tracking progress of time when |
| processing event based ts.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="WaterMarkEventGenerator.html" title="class in org.apache.heron.api.windowing">WaterMarkEventGenerator</a><T extends java.io.Serializable></th> |
| <td class="colLast"> |
| <div class="block">Tracks tuples across input streams and periodically emits watermark events.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <th class="colFirst" scope="row"><a href="WaterMarkEventGeneratorTest.html" title="class in org.apache.heron.api.windowing">WaterMarkEventGeneratorTest</a></th> |
| <td class="colLast"> |
| <div class="block">Unit tests for <a href="WaterMarkEventGenerator.html" title="class in org.apache.heron.api.windowing"><code>WaterMarkEventGenerator</code></a></div> |
| </td> |
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| <th class="colFirst" scope="row"><a href="WindowingConfigs.html" title="class in org.apache.heron.api.windowing">WindowingConfigs</a></th> |
| <td class="colLast"> </td> |
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| <th class="colFirst" scope="row"><a href="WindowManager.html" title="class in org.apache.heron.api.windowing">WindowManager</a><T extends java.io.Serializable></th> |
| <td class="colLast"> |
| <div class="block">Tracks a window of events and fires <a href="WindowLifecycleListener.html" title="interface in org.apache.heron.api.windowing"><code>WindowLifecycleListener</code></a> callbacks |
| on expiry of events or activation of the window due to <a href="TriggerPolicy.html" title="interface in org.apache.heron.api.windowing"><code>TriggerPolicy</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <th class="colFirst" scope="row"><a href="WindowManagerTest.html" title="class in org.apache.heron.api.windowing">WindowManagerTest</a></th> |
| <td class="colLast"> |
| <div class="block">Unit tests for <a href="WindowManager.html" title="class in org.apache.heron.api.windowing"><code>WindowManager</code></a></div> |
| </td> |
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| <th class="colFirst" scope="row"><a href="EvictionPolicy.Action.html" title="enum in org.apache.heron.api.windowing">EvictionPolicy.Action</a></th> |
| <td class="colLast"> |
| <div class="block">The action to be taken when <a href="EvictionPolicy.html#evict(org.apache.heron.api.windowing.Event)"><code>EvictionPolicy.evict(Event)</code></a> is invoked.</div> |
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