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| <div class="subTitle">org.apache.beam.sdk.state</div> |
| <h2 title="Interface GroupingState" class="title">Interface GroupingState<InputT,OutputT></h2> |
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| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>InputT</code> - the type of values added to the state</dd> |
| <dd><code>OutputT</code> - the type of value extracted from the state</dd> |
| </dl> |
| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state">ReadableState</a><OutputT>, <a href="../../../../../org/apache/beam/sdk/state/State.html" title="interface in org.apache.beam.sdk.state">State</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Subinterfaces:</dt> |
| <dd><a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="interface in org.apache.beam.sdk.state">BagState</a><T>, <a href="../../../../../org/apache/beam/sdk/state/CombiningState.html" title="interface in org.apache.beam.sdk.state">CombiningState</a><InputT,AccumT,OutputT>, <a href="../../../../../org/apache/beam/sdk/state/SetState.html" title="interface in org.apache.beam.sdk.state">SetState</a><T>, <a href="../../../../../org/apache/beam/sdk/state/WatermarkHoldState.html" title="interface in org.apache.beam.sdk.state">WatermarkHoldState</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre><a href="../../../../../org/apache/beam/sdk/annotations/Experimental.html" title="annotation in org.apache.beam.sdk.annotations">@Experimental</a>(<a href="../../../../../org/apache/beam/sdk/annotations/Experimental.html#value--">value</a>=<a href="../../../../../org/apache/beam/sdk/annotations/Experimental.Kind.html#STATE">STATE</a>) |
| public interface <span class="typeNameLabel">GroupingState<InputT,OutputT></span> |
| extends <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state">ReadableState</a><OutputT>, <a href="../../../../../org/apache/beam/sdk/state/State.html" title="interface in org.apache.beam.sdk.state">State</a></pre> |
| <div class="block">A <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state"><code>ReadableState</code></a> cell that combines multiple input values and outputs a single value of a |
| different type. |
| |
| <p>This generalizes <a href="../../../../../org/apache/beam/sdk/transforms/GroupByKey.html" title="class in org.apache.beam.sdk.transforms"><code>GroupByKey</code></a> and <a href="../../../../../org/apache/beam/sdk/transforms/Combine.html" title="class in org.apache.beam.sdk.transforms"><code>Combine</code></a> styles of grouping.</div> |
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| <h3>Method Summary</h3> |
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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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/state/GroupingState.html#add-InputT-">add</a></span>(<a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="type parameter in GroupingState">InputT</a> value)</code> |
| <div class="block">Add a value to the buffer.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state">ReadableState</a><java.lang.Boolean></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/state/GroupingState.html#isEmpty--">isEmpty</a></span>()</code> |
| <div class="block">Returns a <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state"><code>ReadableState</code></a> whose <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--"><code>ReadableState.read()</code></a> method will return true if this state is |
| empty at the point when that <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--"><code>ReadableState.read()</code></a> call returns.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="interface in org.apache.beam.sdk.state">GroupingState</a><<a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="type parameter in GroupingState">InputT</a>,<a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="type parameter in GroupingState">OutputT</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/state/GroupingState.html#readLater--">readLater</a></span>()</code> |
| <div class="block">Indicate that the value will be read later.</div> |
| </td> |
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| <h3>Methods inherited from interface org.apache.beam.sdk.state.<a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state">ReadableState</a></h3> |
| <code><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--">read</a></code></li> |
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| <!-- --> |
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| <h3>Methods inherited from interface org.apache.beam.sdk.state.<a href="../../../../../org/apache/beam/sdk/state/State.html" title="interface in org.apache.beam.sdk.state">State</a></h3> |
| <code><a href="../../../../../org/apache/beam/sdk/state/State.html#clear--">clear</a></code></li> |
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| <h4>add</h4> |
| <pre>void add(<a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="type parameter in GroupingState">InputT</a> value)</pre> |
| <div class="block">Add a value to the buffer. |
| |
| <p>Elements added will not be reflected in <code>OutputT</code> objects returned by previous calls |
| to <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--"><code>ReadableState.read()</code></a>.</div> |
| </li> |
| </ul> |
| <a name="isEmpty--"> |
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| <h4>isEmpty</h4> |
| <pre><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state">ReadableState</a><java.lang.Boolean> isEmpty()</pre> |
| <div class="block">Returns a <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state"><code>ReadableState</code></a> whose <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--"><code>ReadableState.read()</code></a> method will return true if this state is |
| empty at the point when that <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--"><code>ReadableState.read()</code></a> call returns.</div> |
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| <h4>readLater</h4> |
| <pre><a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="interface in org.apache.beam.sdk.state">GroupingState</a><<a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="type parameter in GroupingState">InputT</a>,<a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="type parameter in GroupingState">OutputT</a>> readLater()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#readLater--">ReadableState</a></code></span></div> |
| <div class="block">Indicate that the value will be read later. |
| |
| <p>This allows an implementation to start an asynchronous prefetch or to include this state in |
| the next batch of reads.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#readLater--">readLater</a></code> in interface <code><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state">ReadableState</a><<a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="type parameter in GroupingState">OutputT</a>></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>this for convenient chaining</dd> |
| </dl> |
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