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| <h2 title="Annotation Type DoFn.SplitRestriction" class="title">Annotation Type DoFn.SplitRestriction</h2> |
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| <pre>@Documented |
| @Retention(value=RUNTIME) |
| @Target(value=METHOD) |
| <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#SPLITTABLE_DO_FN">SPLITTABLE_DO_FN</a>) |
| public static @interface <span class="memberNameLabel">DoFn.SplitRestriction</span></pre> |
| <div class="block">Annotation for the method that splits restriction of a <a |
| href="https://s.apache.org/splittable-do-fn">splittable</a> <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> into multiple parts to |
| be processed in parallel. |
| |
| <p>Signature: <code>void splitRestriction(InputT element, RestrictionT restriction, |
| OutputReceiver<RestrictionT> receiver, <optional arguments>);</code> |
| |
| <p>The optional arguments are allowed to be: |
| |
| <ul> |
| <li>If one of its arguments is tagged with the <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.Timestamp.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.Timestamp</code></a> annotation, then it will be |
| passed the timestamp of the current element being processed; the argument must be of type |
| <a href="https://static.javadoc.io/joda-time/joda-time/2.10.3/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time"><code>Instant</code></a>. |
| <li>If one of its arguments is a subtype of <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>BoundedWindow</code></a>, then it will be passed the |
| window of the current element. When applied by <a href="../../../../../org/apache/beam/sdk/transforms/ParDo.html" title="class in org.apache.beam.sdk.transforms"><code>ParDo</code></a> the subtype of <a href="../../../../../org/apache/beam/sdk/transforms/windowing/BoundedWindow.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>BoundedWindow</code></a> must match the type of windows on the input <a href="../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a>. If the |
| window is not accessed a runner may perform additional optimizations. |
| <li>If one of its arguments is of type <a href="../../../../../org/apache/beam/sdk/transforms/windowing/PaneInfo.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>PaneInfo</code></a>, then it will be passed information |
| about the current triggering pane. |
| <li>If one of the parameters is of type <a href="../../../../../org/apache/beam/sdk/options/PipelineOptions.html" title="interface in org.apache.beam.sdk.options"><code>PipelineOptions</code></a>, then it will be passed the |
| options for the current pipeline. |
| </ul> |
| |
| <p>Optional: if this method is omitted, the restriction will not be split (equivalent to |
| defining the method and outputting the <code>restriction</code> unchanged).</div> |
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