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<div class="subTitle">org.apache.beam.sdk.io.gcp.pubsub</div>
<h2 title="Class PubsubUnboundedSink" class="title">Class PubsubUnboundedSink</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/io/gcp/pubsub/PubsubMessage.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubMessage</a>&gt;,<a href="../../../../../../../org/apache/beam/sdk/values/PDone.html" title="class in org.apache.beam.sdk.values">PDone</a>&gt;</li>
<li>
<ul class="inheritance">
<li>org.apache.beam.sdk.io.gcp.pubsub.PubsubUnboundedSink</li>
</ul>
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<dt>All Implemented Interfaces:</dt>
<dd>java.io.Serializable, <a href="../../../../../../../org/apache/beam/sdk/transforms/display/HasDisplayData.html" title="interface in org.apache.beam.sdk.transforms.display">HasDisplayData</a></dd>
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<pre>public class <span class="typeNameLabel">PubsubUnboundedSink</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/io/gcp/pubsub/PubsubMessage.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubMessage</a>&gt;,<a href="../../../../../../../org/apache/beam/sdk/values/PDone.html" title="class in org.apache.beam.sdk.values">PDone</a>&gt;</pre>
<div class="block">A PTransform which streams messages to Pubsub.
<ul>
<li>The underlying implementation is just a <a href="../../../../../../../org/apache/beam/sdk/transforms/GroupByKey.html" title="class in org.apache.beam.sdk.transforms"><code>GroupByKey</code></a> followed by a <a href="../../../../../../../org/apache/beam/sdk/transforms/ParDo.html" title="class in org.apache.beam.sdk.transforms"><code>ParDo</code></a>
which publishes as a side effect. (In the future we want to design and switch to a custom
<code>UnboundedSink</code> implementation so as to gain access to system watermark and
end-of-pipeline cleanup.)
<li>We try to send messages in batches while also limiting send latency.
<li>No stats are logged. Rather some counters are used to keep track of elements and batches.
<li>Though some background threads are used by the underlying netty system all actual Pubsub
calls are blocking. We rely on the underlying runner to allow multiple <a href="../../../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a>
instances to execute concurrently and hide latency.
<li>A failed bundle will cause messages to be resent. Thus we rely on the Pubsub consumer to
dedup messages.
</ul></div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../../serialized-form.html#org.apache.beam.sdk.io.gcp.pubsub.PubsubUnboundedSink">Serialized Form</a></dd>
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<code><a href="../../../../../../../org/apache/beam/sdk/transforms/PTransform.html#name">name</a></code></li>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubUnboundedSink.html#PubsubUnboundedSink-org.apache.beam.sdk.io.gcp.pubsub.PubsubClient.PubsubClientFactory-org.apache.beam.sdk.options.ValueProvider-java.lang.String-java.lang.String-int-">PubsubUnboundedSink</a></span>(<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.PubsubClientFactory.html" title="interface in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.PubsubClientFactory</a>&nbsp;pubsubFactory,
<a href="../../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.TopicPath.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.TopicPath</a>&gt;&nbsp;topic,
java.lang.String&nbsp;timestampAttribute,
java.lang.String&nbsp;idAttribute,
int&nbsp;numShards)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubUnboundedSink.html#PubsubUnboundedSink-org.apache.beam.sdk.io.gcp.pubsub.PubsubClient.PubsubClientFactory-org.apache.beam.sdk.options.ValueProvider-java.lang.String-java.lang.String-int-int-int-">PubsubUnboundedSink</a></span>(<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.PubsubClientFactory.html" title="interface in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.PubsubClientFactory</a>&nbsp;pubsubFactory,
<a href="../../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.TopicPath.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.TopicPath</a>&gt;&nbsp;topic,
java.lang.String&nbsp;timestampAttribute,
java.lang.String&nbsp;idAttribute,
int&nbsp;numShards,
int&nbsp;publishBatchSize,
int&nbsp;publishBatchBytes)</code>&nbsp;</td>
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<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><a href="../../../../../../../org/apache/beam/sdk/values/PDone.html" title="class in org.apache.beam.sdk.values">PDone</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubUnboundedSink.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/io/gcp/pubsub/PubsubMessage.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubMessage</a>&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>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubUnboundedSink.html#getIdAttribute--">getIdAttribute</a></span>()</code>
<div class="block">Get the id attribute.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubUnboundedSink.html#getTimestampAttribute--">getTimestampAttribute</a></span>()</code>
<div class="block">Get the timestamp attribute.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.TopicPath.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.TopicPath</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubUnboundedSink.html#getTopic--">getTopic</a></span>()</code>
<div class="block">Get the topic being written to.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.TopicPath.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.TopicPath</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubUnboundedSink.html#getTopicProvider--">getTopicProvider</a></span>()</code>
<div class="block">Get the <a href="../../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options"><code>ValueProvider</code></a> for the topic being written to.</div>
</td>
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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#compose-java.lang.String-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#getKindString--">getKindString</a>, <a href="../../../../../../../org/apache/beam/sdk/transforms/PTransform.html#getName--">getName</a>, <a href="../../../../../../../org/apache/beam/sdk/transforms/PTransform.html#populateDisplayData-org.apache.beam.sdk.transforms.display.DisplayData.Builder-">populateDisplayData</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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<h3>Constructor Detail</h3>
<a name="PubsubUnboundedSink-org.apache.beam.sdk.io.gcp.pubsub.PubsubClient.PubsubClientFactory-org.apache.beam.sdk.options.ValueProvider-java.lang.String-java.lang.String-int-">
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<h4>PubsubUnboundedSink</h4>
<pre>public&nbsp;PubsubUnboundedSink(<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.PubsubClientFactory.html" title="interface in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.PubsubClientFactory</a>&nbsp;pubsubFactory,
<a href="../../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.TopicPath.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.TopicPath</a>&gt;&nbsp;topic,
java.lang.String&nbsp;timestampAttribute,
java.lang.String&nbsp;idAttribute,
int&nbsp;numShards)</pre>
</li>
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<a name="PubsubUnboundedSink-org.apache.beam.sdk.io.gcp.pubsub.PubsubClient.PubsubClientFactory-org.apache.beam.sdk.options.ValueProvider-java.lang.String-java.lang.String-int-int-int-">
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<h4>PubsubUnboundedSink</h4>
<pre>public&nbsp;PubsubUnboundedSink(<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.PubsubClientFactory.html" title="interface in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.PubsubClientFactory</a>&nbsp;pubsubFactory,
<a href="../../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.TopicPath.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.TopicPath</a>&gt;&nbsp;topic,
java.lang.String&nbsp;timestampAttribute,
java.lang.String&nbsp;idAttribute,
int&nbsp;numShards,
int&nbsp;publishBatchSize,
int&nbsp;publishBatchBytes)</pre>
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<a name="getTopic--">
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<h4>getTopic</h4>
<pre>public&nbsp;<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.TopicPath.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.TopicPath</a>&nbsp;getTopic()</pre>
<div class="block">Get the topic being written to.</div>
</li>
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<a name="getTopicProvider--">
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<h4>getTopicProvider</h4>
<pre>public&nbsp;<a href="../../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;<a href="../../../../../../../org/apache/beam/sdk/io/gcp/pubsub/PubsubClient.TopicPath.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubClient.TopicPath</a>&gt;&nbsp;getTopicProvider()</pre>
<div class="block">Get the <a href="../../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options"><code>ValueProvider</code></a> for the topic being written to.</div>
</li>
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<pre><a href="https://static.javadoc.io/com.google.code.findbugs/jsr305/3.0.2/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</a>
public&nbsp;java.lang.String&nbsp;getTimestampAttribute()</pre>
<div class="block">Get the timestamp attribute.</div>
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<pre><a href="https://static.javadoc.io/com.google.code.findbugs/jsr305/3.0.2/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</a>
public&nbsp;java.lang.String&nbsp;getIdAttribute()</pre>
<div class="block">Get the id attribute.</div>
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<h4>expand</h4>
<pre>public&nbsp;<a href="../../../../../../../org/apache/beam/sdk/values/PDone.html" title="class in org.apache.beam.sdk.values">PDone</a>&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/io/gcp/pubsub/PubsubMessage.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubMessage</a>&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/io/gcp/pubsub/PubsubMessage.html" title="class in org.apache.beam.sdk.io.gcp.pubsub">PubsubMessage</a>&gt;,<a href="../../../../../../../org/apache/beam/sdk/values/PDone.html" title="class in org.apache.beam.sdk.values">PDone</a>&gt;</code></dd>
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