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| <div class="subTitle">org.apache.beam.sdk.state</div> |
| <h2 title="Interface BagState" class="title">Interface BagState<T></h2> |
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| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - The type of elements in the bag.</dd> |
| </dl> |
| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="interface in org.apache.beam.sdk.state">GroupingState</a><T,java.lang.Iterable<T>>, <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state">ReadableState</a><java.lang.Iterable<T>>, <a href="../../../../../org/apache/beam/sdk/state/State.html" title="interface in org.apache.beam.sdk.state">State</a></dd> |
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| <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">BagState<T></span> |
| extends <a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="interface in org.apache.beam.sdk.state">GroupingState</a><T,java.lang.Iterable<T>></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 containing a bag of values. Items can be added to the bag and the |
| contents read out. |
| |
| <p>Implementations of this form of state are expected to implement <a href="../../../../../org/apache/beam/sdk/state/GroupingState.html#add-InputT-"><code>GroupingState.add(InputT)</code></a> efficiently, not |
| via a sequence of read-modify-write.</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> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>java.lang.Iterable<<a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="type parameter in BagState">T</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/state/BagState.html#read--">read</a></span>()</code> |
| <div class="block">Read the current value, blocking until it is available.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="interface in org.apache.beam.sdk.state">BagState</a><<a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="type parameter in BagState">T</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/state/BagState.html#readLater--">readLater</a></span>()</code> |
| <div class="block">Indicate that the value will be read later.</div> |
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| <h3>Methods inherited from interface org.apache.beam.sdk.state.<a href="../../../../../org/apache/beam/sdk/state/GroupingState.html" title="interface in org.apache.beam.sdk.state">GroupingState</a></h3> |
| <code><a href="../../../../../org/apache/beam/sdk/state/GroupingState.html#add-InputT-">add</a>, <a href="../../../../../org/apache/beam/sdk/state/GroupingState.html#isEmpty--">isEmpty</a></code></li> |
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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>read</h4> |
| <pre>@Nonnull |
| java.lang.Iterable<<a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="type parameter in BagState">T</a>> read()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--">ReadableState</a></code></span></div> |
| <div class="block">Read the current value, blocking until it is available. |
| |
| <p>If there will be many calls to <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--"><code>ReadableState.read()</code></a> for different state in short succession, you |
| should first call <a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#readLater--"><code>ReadableState.readLater()</code></a> for all of them so the reads can potentially be batched |
| (depending on the underlying implementation}. |
| |
| <p>The returned object should be independent of the underlying state. Any direct modification |
| of the returned object should not modify state without going through the appropriate state |
| interface, and modification to the state should not be mirrored in the returned object.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html#read--">read</a></code> in interface <code><a href="../../../../../org/apache/beam/sdk/state/ReadableState.html" title="interface in org.apache.beam.sdk.state">ReadableState</a><java.lang.Iterable<<a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="type parameter in BagState">T</a>>></code></dd> |
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| <a name="readLater--"> |
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| <h4>readLater</h4> |
| <pre><a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="interface in org.apache.beam.sdk.state">BagState</a><<a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="type parameter in BagState">T</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/GroupingState.html#readLater--">readLater</a></code> in interface <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/BagState.html" title="type parameter in BagState">T</a>,java.lang.Iterable<<a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="type parameter in BagState">T</a>>></code></dd> |
| <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><java.lang.Iterable<<a href="../../../../../org/apache/beam/sdk/state/BagState.html" title="type parameter in BagState">T</a>>></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>this for convenient chaining</dd> |
| </dl> |
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