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<div class="subTitle">org.apache.beam.sdk.transforms</div>
<h2 title="Class Combine.PerKeyWithHotKeyFanout" class="title">Class Combine.PerKeyWithHotKeyFanout&lt;K,InputT,OutputT&gt;</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">org.apache.beam.sdk.transforms.PTransform</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;K,InputT&gt;&gt;,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;K,OutputT&gt;&gt;&gt;</li>
<li>
<ul class="inheritance">
<li>org.apache.beam.sdk.transforms.Combine.PerKeyWithHotKeyFanout&lt;K,InputT,OutputT&gt;</li>
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</dl>
<dl>
<dt>Enclosing class:</dt>
<dd><a href="../../../../../org/apache/beam/sdk/transforms/Combine.html" title="class in org.apache.beam.sdk.transforms">Combine</a></dd>
</dl>
<hr>
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<pre>public static class <span class="typeNameLabel">Combine.PerKeyWithHotKeyFanout&lt;K,InputT,OutputT&gt;</span>
extends <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;K,InputT&gt;&gt;,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;K,OutputT&gt;&gt;&gt;</pre>
<div class="block">Like <a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKey.html" title="class in org.apache.beam.sdk.transforms"><code>Combine.PerKey</code></a>, but sharding the combining of hot keys.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../serialized-form.html#org.apache.beam.sdk.transforms.Combine.PerKeyWithHotKeyFanout">Serialized Form</a></dd>
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<h3>Fields inherited from class&nbsp;org.apache.beam.sdk.transforms.<a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a></h3>
<code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#name">name</a></code></li>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</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><a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">OutputT</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html#expand-org.apache.beam.sdk.values.PCollection-">expand</a></span>(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">InputT</a>&gt;&gt;&nbsp;input)</code>
<div class="block">Override this method to specify how this <code>PTransform</code> should be expanded on the given
<code>InputT</code>.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html#getKindString--">getKindString</a></span>()</code>
<div class="block">Returns the name to use by default for this <code>PTransform</code> (not including the names of any
enclosing <code>PTransform</code>s).</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/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html#populateDisplayData-org.apache.beam.sdk.transforms.display.DisplayData.Builder-">populateDisplayData</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/display/DisplayData.Builder.html" title="interface in org.apache.beam.sdk.transforms.display">DisplayData.Builder</a>&nbsp;builder)</code>
<div class="block">Register display data for the given transform or component.</div>
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<h3>Methods inherited from class&nbsp;org.apache.beam.sdk.transforms.<a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a></h3>
<code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#compose-org.apache.beam.sdk.transforms.SerializableFunction-">compose</a>, <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#getAdditionalInputs--">getAdditionalInputs</a>, <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#getDefaultOutputCoder--">getDefaultOutputCoder</a>, <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#getDefaultOutputCoder-InputT-">getDefaultOutputCoder</a>, <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#getDefaultOutputCoder-InputT-org.apache.beam.sdk.values.PCollection-">getDefaultOutputCoder</a>, <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#getName--">getName</a>, <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#toString--">toString</a>, <a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#validate-org.apache.beam.sdk.options.PipelineOptions-">validate</a></code></li>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<h4>getKindString</h4>
<pre>protected&nbsp;java.lang.String&nbsp;getKindString()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#getKindString--">PTransform</a></code></span></div>
<div class="block">Returns the name to use by default for this <code>PTransform</code> (not including the names of any
enclosing <code>PTransform</code>s).
<p>By default, returns the base name of this <code>PTransform</code>'s class.
<p>The caller is responsible for ensuring that names of applied <code>PTransform</code>s are unique,
e.g., by adding a uniquifying suffix when needed.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#getKindString--">getKindString</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">InputT</a>&gt;&gt;,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">OutputT</a>&gt;&gt;&gt;</code></dd>
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<h4>expand</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">OutputT</a>&gt;&gt;&nbsp;expand(<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">InputT</a>&gt;&gt;&nbsp;input)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#expand-InputT-">PTransform</a></code></span></div>
<div class="block">Override this method to specify how this <code>PTransform</code> should be expanded on the given
<code>InputT</code>.
<p>NOTE: This method should not be called directly. Instead apply the <code>PTransform</code> should
be applied to the <code>InputT</code> using the <code>apply</code> method.
<p>Composite transforms, which are defined in terms of other transforms, should return the
output of one of the composed transforms. Non-composite transforms, which do not apply any
transforms internally, should return a new unbound output and register evaluators (via
backend-specific registration methods).</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#expand-InputT-">expand</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">InputT</a>&gt;&gt;,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">OutputT</a>&gt;&gt;&gt;</code></dd>
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<h4>populateDisplayData</h4>
<pre>public&nbsp;void&nbsp;populateDisplayData(<a href="../../../../../org/apache/beam/sdk/transforms/display/DisplayData.Builder.html" title="interface in org.apache.beam.sdk.transforms.display">DisplayData.Builder</a>&nbsp;builder)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#populateDisplayData-org.apache.beam.sdk.transforms.display.DisplayData.Builder-">PTransform</a></code></span></div>
<div class="block">Register display data for the given transform or component.
<p><code>populateDisplayData(DisplayData.Builder)</code> is invoked by Pipeline runners to collect
display data via <a href="../../../../../org/apache/beam/sdk/transforms/display/DisplayData.html#from-org.apache.beam.sdk.transforms.display.HasDisplayData-"><code>DisplayData.from(HasDisplayData)</code></a>. Implementations may call <code>super.populateDisplayData(builder)</code> in order to register display data in the current namespace,
but should otherwise use <code>subcomponent.populateDisplayData(builder)</code> to use the namespace
of the subcomponent.
<p>By default, does not register any display data. Implementors may override this method to
provide their own display data.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/beam/sdk/transforms/display/HasDisplayData.html#populateDisplayData-org.apache.beam.sdk.transforms.display.DisplayData.Builder-">populateDisplayData</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/display/HasDisplayData.html" title="interface in org.apache.beam.sdk.transforms.display">HasDisplayData</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html#populateDisplayData-org.apache.beam.sdk.transforms.display.DisplayData.Builder-">populateDisplayData</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">InputT</a>&gt;&gt;,<a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">K</a>,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.PerKeyWithHotKeyFanout.html" title="type parameter in Combine.PerKeyWithHotKeyFanout">OutputT</a>&gt;&gt;&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>builder</code> - The builder to populate with display data.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../org/apache/beam/sdk/transforms/display/HasDisplayData.html" title="interface in org.apache.beam.sdk.transforms.display"><code>HasDisplayData</code></a></dd>
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