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[32/52] [partial] beam-site git commit: Publish Javadoc for version
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http://git-wip-us.apache.org/repos/asf/beam-site/blob/de6a0417/content/documentation/sdks/javadoc/0.4.0/org/apache/beam/runners/core/ReduceFnRunner.html
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+<title>ReduceFnRunner (Apache Beam SDK for Java, version 0.4.0)</title>
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+<div class="subTitle">org.apache.beam.runners.core</div>
+<h2 title="Class ReduceFnRunner" class="title">Class ReduceFnRunner<K,InputT,OutputT,W extends <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing">BoundedWindow</a>></h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
+<li>
+<ul class="inheritance">
+<li>org.apache.beam.runners.core.ReduceFnRunner<K,InputT,OutputT,W></li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt><span class="paramLabel">Type Parameters:</span></dt>
+<dd><code>K</code> - The type of key being processed.</dd>
+<dd><code>InputT</code> - The type of values associated with the key.</dd>
+<dd><code>OutputT</code> - The output type that will be produced for each key.</dd>
+<dd><code>W</code> - The type of windows this operates on.</dd>
+</dl>
+<hr>
+<br>
+<pre>public class <span class="typeNameLabel">ReduceFnRunner<K,InputT,OutputT,W extends <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing">BoundedWindow</a>></span>
+extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
+<div class="block">Manages the execution of a <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core"><code>ReduceFn</code></a> after a <a href="../../../../../org/apache/beam/runners/core/GroupByKeyViaGroupByKeyOnly.GroupByKeyOnly.html" title="class in org.apache.beam.runners.core"><code>GroupByKeyViaGroupByKeyOnly.GroupByKeyOnly</code></a> has partitioned the
+ <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a> by key.
+
+ <p>The <a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html#onTrigger-org.apache.beam.runners.core.ReduceFn.Context-org.apache.beam.runners.core.ReduceFn.Context-boolean-boolean-"><code>onTrigger(org.apache.beam.runners.core.ReduceFn<K, InputT, OutputT, W>.Context, org.apache.beam.runners.core.ReduceFn<K, InputT, OutputT, W>.Context, boolean, boolean)</code></a> relies on a <a href="../../../../../org/apache/beam/runners/core/triggers/TriggerStateMachineRunner.html" title="class in org.apache.beam.runners.core.triggers"><code>TriggerStateMachineRunner</code></a> to manage the execution
+ of the triggering logic. The <code>ReduceFnRunner</code>s responsibilities are:
+
+ <ul>
+ <li>Tracking the windows that are active (have buffered data) as elements arrive and triggers are
+ fired.
+ <li>Holding the watermark based on the timestamps of elements in a pane and releasing it when the
+ trigger fires.
+ <li>Calling the appropriate callbacks on <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core"><code>ReduceFn</code></a> based on trigger execution, timer
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+ <li>Scheduling garbage collection of state associated with a specific window, and making that
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+ <a href="../../../../../org/apache/beam/sdk/util/WindowingStrategy.html" title="class in org.apache.beam.sdk.util">WindowingStrategy</a><?,<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">W</a>> windowingStrategy,
+ <a href="../../../../../org/apache/beam/runners/core/triggers/ExecutableTriggerStateMachine.html" title="class in org.apache.beam.runners.core.triggers">ExecutableTriggerStateMachine</a> triggerStateMachine,
+ <a href="../../../../../org/apache/beam/sdk/util/state/StateInternals.html" title="interface in org.apache.beam.sdk.util.state">StateInternals</a><<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">K</a>> stateInternals,
+ <a href="../../../../../org/apache/beam/sdk/util/TimerInternals.html" title="interface in org.apache.beam.sdk.util">TimerInternals</a> timerInternals,
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+ <a href="../../../../../org/apache/beam/sdk/util/SideInputReader.html" title="interface in org.apache.beam.sdk.util">SideInputReader</a> sideInputReader,
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+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
+</tr>
+<tr id="i0" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html#onTimers-java.lang.Iterable-">onTimers</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><<a href="../../../../../org/apache/beam/sdk/util/TimerInternals.TimerData.html" title="class in org.apache.beam.sdk.util">TimerInternals.TimerData</a>> timers)</code> </td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html#persist--">persist</a></span>()</code> </td>
+</tr>
+<tr id="i2" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html#processElements-java.lang.Iterable-">processElements</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><<a href="../../../../../org/apache/beam/sdk/util/WindowedValue.html" title="class in org.apache.beam.sdk.util">WindowedValue</a><<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">InputT</a>>> values)</code>
+<div class="block">Incorporate <code>values</code> into the underlying reduce function, and manage holds, timers,
+ triggers, and window merging.</div>
+</td>
+</tr>
+</table>
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+<pre>public ReduceFnRunner(<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">K</a> key,
+ <a href="../../../../../org/apache/beam/sdk/util/WindowingStrategy.html" title="class in org.apache.beam.sdk.util">WindowingStrategy</a><?,<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">W</a>> windowingStrategy,
+ <a href="../../../../../org/apache/beam/runners/core/triggers/ExecutableTriggerStateMachine.html" title="class in org.apache.beam.runners.core.triggers">ExecutableTriggerStateMachine</a> triggerStateMachine,
+ <a href="../../../../../org/apache/beam/sdk/util/state/StateInternals.html" title="interface in org.apache.beam.sdk.util.state">StateInternals</a><<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">K</a>> stateInternals,
+ <a href="../../../../../org/apache/beam/sdk/util/TimerInternals.html" title="interface in org.apache.beam.sdk.util">TimerInternals</a> timerInternals,
+ <a href="../../../../../org/apache/beam/runners/core/OutputWindowedValue.html" title="interface in org.apache.beam.runners.core">OutputWindowedValue</a><<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a><<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">K</a>,<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">OutputT</a>>> outputter,
+ <a href="../../../../../org/apache/beam/sdk/util/SideInputReader.html" title="interface in org.apache.beam.sdk.util">SideInputReader</a> sideInputReader,
+ <a href="../../../../../org/apache/beam/sdk/transforms/Aggregator.html" title="interface in org.apache.beam.sdk.transforms">Aggregator</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>,<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>> droppedDueToClosedWindow,
+ <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html" title="class in org.apache.beam.runners.core">ReduceFn</a><<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">K</a>,<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">InputT</a>,<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">OutputT</a>,<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">W</a>> reduceFn,
+ <a href="../../../../../org/apache/beam/sdk/options/PipelineOptions.html" title="interface in org.apache.beam.sdk.options">PipelineOptions</a> options)</pre>
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+<pre>public void processElements(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><<a href="../../../../../org/apache/beam/sdk/util/WindowedValue.html" title="class in org.apache.beam.sdk.util">WindowedValue</a><<a href="../../../../../org/apache/beam/runners/core/ReduceFnRunner.html" title="type parameter in ReduceFnRunner">InputT</a>>> values)
+ throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
+<div class="block">Incorporate <code>values</code> into the underlying reduce function, and manage holds, timers,
+ triggers, and window merging.
+
+ <p>The general strategy is:
+ <ol>
+ <li>Use <a href="../../../../../org/apache/beam/sdk/util/WindowedValue.html#getWindows--"><code>WindowedValue.getWindows()</code></a> (itself determined using
+ <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html#assignWindows-org.apache.beam.sdk.transforms.windowing.WindowFn.AssignContext-"><code>WindowFn.assignWindows(org.apache.beam.sdk.transforms.windowing.WindowFn<T, W>.AssignContext)</code></a>) to determine which windows each element belongs to. Some
+ of those windows will already have state associated with them. The rest are considered
+ NEW.
+ <li>Use <a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html#mergeWindows-org.apache.beam.sdk.transforms.windowing.WindowFn.MergeContext-"><code>WindowFn.mergeWindows(org.apache.beam.sdk.transforms.windowing.WindowFn<T, W>.MergeContext)</code></a> to attempt to merge currently ACTIVE and NEW windows.
+ Each NEW window will become either ACTIVE or be discardedL.
+ (See <a href="../../../../../org/apache/beam/sdk/util/ActiveWindowSet.html" title="interface in org.apache.beam.sdk.util"><code>ActiveWindowSet</code></a> for definitions of these terms.)
+ <li>If at all possible, eagerly substitute NEW windows with their ACTIVE state address
+ windows before any state is associated with the NEW window. In the common case that
+ windows for new elements are merged into existing ACTIVE windows then no additional
+ storage or merging overhead will be incurred.
+ <li>Otherwise, keep track of the state address windows for ACTIVE windows so that their
+ states can be merged on-demand when a pane fires.
+ <li>Process the element for each of the windows it's windows have been merged into according
+ to <a href="../../../../../org/apache/beam/sdk/util/ActiveWindowSet.html" title="interface in org.apache.beam.sdk.util"><code>ActiveWindowSet</code></a>. Processing may require running triggers, setting timers,
+ setting holds, and invoking <a href="../../../../../org/apache/beam/runners/core/ReduceFn.html#onTrigger-org.apache.beam.runners.core.ReduceFn.OnTriggerContext-"><code>ReduceFn.onTrigger(org.apache.beam.runners.core.ReduceFn<K, InputT, OutputT, W>.OnTriggerContext)</code></a>.
+ </ol></div>
+<dl>
+<dt><span class="throwsLabel">Throws:</span></dt>
+<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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+<div class="header">
+<div class="subTitle">org.apache.beam.runners.core</div>
+<h2 title="Class SideInputHandler" class="title">Class SideInputHandler</h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
+<li>
+<ul class="inheritance">
+<li>org.apache.beam.runners.core.SideInputHandler</li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt>All Implemented Interfaces:</dt>
+<dd><a href="../../../../../org/apache/beam/sdk/util/ReadyCheckingSideInputReader.html" title="interface in org.apache.beam.sdk.util">ReadyCheckingSideInputReader</a>, <a href="../../../../../org/apache/beam/sdk/util/SideInputReader.html" title="interface in org.apache.beam.sdk.util">SideInputReader</a></dd>
+</dl>
+<hr>
+<br>
+<pre>public class <span class="typeNameLabel">SideInputHandler</span>
+extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
+implements <a href="../../../../../org/apache/beam/sdk/util/ReadyCheckingSideInputReader.html" title="interface in org.apache.beam.sdk.util">ReadyCheckingSideInputReader</a></pre>
+<div class="block">Generic side input handler that uses <a href="../../../../../org/apache/beam/sdk/util/state/StateInternals.html" title="interface in org.apache.beam.sdk.util.state"><code>StateInternals</code></a> to store all data. Both the actual
+ side-input data and data about the windows for which we have side inputs available are stored
+ using <code>StateInternals</code>.
+
+ <p>The given <code>StateInternals</code> must not be scoped to an element key. The state
+ must instead be scoped to one key group for which the side input is being managed.
+
+ <p>This is useful for runners that transmit the side-input elements in band, as opposed
+ to how Dataflow has an external service for managing side inputs.
+
+ <p>Note: storing the available windows in an extra state is redundant for now but in the
+ future we might want to know which windows we have available so that we can garbage collect
+ side input data. For now, this will never clean up side-input data because we have no way
+ of knowing when we reach the GC horizon.</div>
+</li>
+</ul>
+</div>
+<div class="summary">
+<ul class="blockList">
+<li class="blockList">
+<!-- =========== FIELD SUMMARY =========== -->
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+<li class="blockList"><a name="field.summary">
+<!-- -->
+</a>
+<h3>Field Summary</h3>
+<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
+<caption><span>Fields</span><span class="tabEnd"> </span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Field and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>protected <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values">PCollectionView</a><?>></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SideInputHandler.html#sideInputs">sideInputs</a></span></code>
+<div class="block">The list of side inputs that we're handling.</div>
+</td>
+</tr>
+</table>
+</li>
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+<h3>Constructor Summary</h3>
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+<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
+<tr>
+<th class="colOne" scope="col">Constructor and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SideInputHandler.html#SideInputHandler-java.util.Collection-org.apache.beam.sdk.util.state.StateInternals-">SideInputHandler</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values">PCollectionView</a><?>> sideInputs,
+ <a href="../../../../../org/apache/beam/sdk/util/state/StateInternals.html" title="interface in org.apache.beam.sdk.util.state">StateInternals</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Void.html?is-external=true" title="class or interface in java.lang">Void</a>> stateInternals)</code>
+<div class="block">Creates a new <code>SideInputHandler</code> for the given side inputs that uses
+ the given <code>StateInternals</code> to store side input data and side-input meta data.</div>
+</td>
+</tr>
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+<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
+</tr>
+<tr id="i0" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SideInputHandler.html#addSideInputValue-org.apache.beam.sdk.values.PCollectionView-org.apache.beam.sdk.util.WindowedValue-">addSideInputValue</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values">PCollectionView</a><?> sideInput,
+ <a href="../../../../../org/apache/beam/sdk/util/WindowedValue.html" title="class in org.apache.beam.sdk.util">WindowedValue</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><?>> value)</code>
+<div class="block">Add the given value to the internal side-input store of the given side input.</div>
+</td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code><T> boolean</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SideInputHandler.html#contains-org.apache.beam.sdk.values.PCollectionView-">contains</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values">PCollectionView</a><T> view)</code>
+<div class="block">Returns true if the given <a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values"><code>PCollectionView</code></a> is valid for this reader.</div>
+</td>
+</tr>
+<tr id="i2" class="altColor">
+<td class="colFirst"><code><T> T</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SideInputHandler.html#get-org.apache.beam.sdk.values.PCollectionView-org.apache.beam.sdk.transforms.windowing.BoundedWindow-">get</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values">PCollectionView</a><T> sideInput,
+ <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing">BoundedWindow</a> window)</code>
+<div class="block">Returns the value of the given <a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values"><code>PCollectionView</code></a> for the given <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>BoundedWindow</code></a>.</div>
+</td>
+</tr>
+<tr id="i3" class="rowColor">
+<td class="colFirst"><code>boolean</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SideInputHandler.html#isEmpty--">isEmpty</a></span>()</code>
+<div class="block">Returns true if there are no side inputs in this reader.</div>
+</td>
+</tr>
+<tr id="i4" class="altColor">
+<td class="colFirst"><code>boolean</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SideInputHandler.html#isReady-org.apache.beam.sdk.values.PCollectionView-org.apache.beam.sdk.transforms.windowing.BoundedWindow-">isReady</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values">PCollectionView</a><?> sideInput,
+ <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing">BoundedWindow</a> window)</code>
+<div class="block">Returns true if the <a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values"><code>PCollectionView</code></a> is ready in the provided <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>BoundedWindow</code></a>.</div>
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+</table>
+<ul class="blockList">
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+<h3>Methods inherited from class java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
+<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang
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+<li class="blockList"><a name="field.detail">
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+<h3>Field Detail</h3>
+<a name="sideInputs">
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+<h4>sideInputs</h4>
+<pre>protected final <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values">PCollectionView</a><?>> sideInputs</pre>
+<div class="block">The list of side inputs that we're handling.</div>
+</li>
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+<li class="blockList"><a name="constructor.detail">
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+<h3>Constructor Detail</h3>
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+<pre>public SideInputHandler(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/beam/sdk/values/PCollectionView.html" title="interface in org.apache.beam.sdk.values">PCollectionView</a><?>> sideInputs,
+ <a href="../../../../../org/apache/beam/sdk/util/state/StateInternals.html" title="interface in org.apache.beam.sdk.util.state">StateInternals</a><<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Void.html?is-external=true" title="class or interface in java.lang">Void</a>> stateInternals)</pre>
+<div class="block">Creates a new <code>SideInputHandler</code> for the given side inputs that uses
+ the given <code>StateInternals</code> to store side input data and side-input meta data.</div>
+</li>
+</ul>
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+<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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+<div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/beam/sdk/util/ReadyCheckingSideInputReader.html#isReady-org.apache.beam.sdk.values.PCollectionView-org.apache.beam.sdk.transforms.windowing.BoundedWindow-">ReadyCheckingSideInputReader</a></code></span></div>
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+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+<title>SimpleDoFnRunner (Apache Beam SDK for Java, version 0.4.0)</title>
+<meta name="date" content="2016-12-29">
+<link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style">
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+<div class="header">
+<div class="subTitle">org.apache.beam.runners.core</div>
+<h2 title="Class SimpleDoFnRunner" class="title">Class SimpleDoFnRunner<InputT,OutputT></h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
+<li>
+<ul class="inheritance">
+<li>org.apache.beam.runners.core.SimpleDoFnRunner<InputT,OutputT></li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt><span class="paramLabel">Type Parameters:</span></dt>
+<dd><code>InputT</code> - the type of the <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> (main) input elements</dd>
+<dd><code>OutputT</code> - the type of the <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> (main) output elements</dd>
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+<dl>
+<dt>All Implemented Interfaces:</dt>
+<dd><a href="../../../../../org/apache/beam/runners/core/DoFnRunner.html" title="interface in org.apache.beam.runners.core">DoFnRunner</a><InputT,OutputT></dd>
+</dl>
+<hr>
+<br>
+<pre>public class <span class="typeNameLabel">SimpleDoFnRunner<InputT,OutputT></span>
+extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
+implements <a href="../../../../../org/apache/beam/runners/core/DoFnRunner.html" title="interface in org.apache.beam.runners.core">DoFnRunner</a><InputT,OutputT></pre>
+<div class="block">Runs a <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> by constructing the appropriate contexts and passing them in.
+
+ <p>Also, if the <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> observes the window of the element, then <a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html" title="class in org.apache.beam.runners.core"><code>SimpleDoFnRunner</code></a>
+ explodes windows of the input <a href="../../../../../org/apache/beam/sdk/util/WindowedValue.html" title="class in org.apache.beam.sdk.util"><code>WindowedValue</code></a> and calls <code>DoFn.ProcessElement</code> for
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+<code><a href="../../../../../org/apache/beam/runners/core/DoFnRunner.ReduceFnExecutor.html" title="interface in org.apache.beam.runners.core">DoFnRunner.ReduceFnExecutor</a><<a href="../../../../../org/apache/beam/runners/core/DoFnRunner.ReduceFnExecutor.html" title="type parameter in DoFnRunner.ReduceFnExecutor">K</a>,<a href="../../../../../org/apache/beam/runners/core/DoFnRunner.ReduceFnExecutor.html" title="type parameter in DoFnRunner.ReduceFnExecutor">InputT</a>,<a href="../../../../../org/apache/beam/runners/core/DoFnRunner.ReduceFnExecutor.html" title="type parameter in DoFnRunner.ReduceFnExecutor">OutputT</a>,<a href="../../../../../org/apache/beam/runners/core/DoFnRunner.ReduceFnExecutor.html" title="type parameter in DoFnRunner.ReduceFnExecutor">W</a>></code></li>
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+<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
+<tr>
+<th class="colOne" scope="col">Constructor and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html#SimpleDoFnRunner-org.apache.beam.sdk.options.PipelineOptions-org.apache.beam.sdk.transforms.DoFn-org.apache.beam.sdk.util.SideInputReader-org.apache.beam.runners.core.DoFnRunners.OutputManager-org.apache.beam.sdk.values.TupleTag-java.util.List-org.apache.beam.sdk.util.ExecutionContext.StepContext-org.apache.beam.sdk.transforms.Aggregator.AggregatorFactory-org.apache.beam.sdk.util.WindowingStrategy-">SimpleDoFnRunner</a></span>(<a href="../../../../../org/apache/beam/sdk/options/PipelineOptions.html" title="interface in org.apache.beam.sdk.options">PipelineOptions</a> options,
+ <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms">DoFn</a><<a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html" title="type parameter in SimpleDoFnRunner">InputT</a>,<a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html" title="type parameter in SimpleDoFnRunner">OutputT</a>> fn,
+ <a href="../../../../../org/apache/beam/sdk/util/SideInputReader.html" title="interface in org.apache.beam.sdk.util">SideInputReader</a> sideInputReader,
+ <a href="../../../../../org/apache/beam/runners/core/DoFnRunners.OutputManager.html" title="interface in org.apache.beam.runners.core">DoFnRunners.OutputManager</a> outputManager,
+ <a href="../../../../../org/apache/beam/sdk/values/TupleTag.html" title="class in org.apache.beam.sdk.values">TupleTag</a><<a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html" title="type parameter in SimpleDoFnRunner">OutputT</a>> mainOutputTag,
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+ <a href="../../../../../org/apache/beam/sdk/util/WindowingStrategy.html" title="class in org.apache.beam.sdk.util">WindowingStrategy</a><?,?> windowingStrategy)</code> </td>
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+<h3>Method Summary</h3>
+<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
+<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
+</tr>
+<tr id="i0" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html#finishBundle--">finishBundle</a></span>()</code>
+<div class="block">Calls a <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn's</code></a> <code>@FinishBundle</code> method and performs
+ additional tasks, such as flushing in-memory states.</div>
+</td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html#processElement-org.apache.beam.sdk.util.WindowedValue-">processElement</a></span>(<a href="../../../../../org/apache/beam/sdk/util/WindowedValue.html" title="class in org.apache.beam.sdk.util">WindowedValue</a><<a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html" title="type parameter in SimpleDoFnRunner">InputT</a>> compressedElem)</code>
+<div class="block">Calls a <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn's</code></a> <code>@ProcessElement</code> method with a
+ <code>DoFn.ProcessContext</code> containing the provided element.</div>
+</td>
+</tr>
+<tr id="i2" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html#startBundle--">startBundle</a></span>()</code>
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+ <a href="../../../../../org/apache/beam/sdk/util/SideInputReader.html" title="interface in org.apache.beam.sdk.util">SideInputReader</a> sideInputReader,
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+<div class="block">Prepares and calls a <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn's</code></a> <code>@StartBundle</code> method.</div>
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+<dd><code><a href="../../../../../org/apache/beam/runners/core/DoFnRunner.html#startBundle--">startBundle</a></code> in interface <code><a href="../../../../../org/apache/beam/runners/core/DoFnRunner.html" title="interface in org.apache.beam.runners.core">DoFnRunner</a><<a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html" title="type parameter in SimpleDoFnRunner">InputT</a>,<a href="../../../../../org/apache/beam/runners/core/SimpleDoFnRunner.html" title="type parameter in SimpleDoFnRunner">OutputT</a>></code></dd>
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+<div class="block">Calls a <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn's</code></a> <code>@FinishBundle</code> method and performs
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