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https://issues.apache.org/jira/browse/FLINK-4460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15905138#comment-15905138
]
ASF GitHub Bot commented on FLINK-4460:
---------------------------------------
Github user kl0u commented on a diff in the pull request:
https://github.com/apache/flink/pull/3484#discussion_r105398836
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/graph/StreamGraphGenerator.java
---
@@ -300,6 +303,36 @@ private StreamGraph
generateInternal(List<StreamTransformation<?>> transformatio
}
/**
+ * Transforms a {@code SideOutputTransformation}.
+ *
+ * <p>
+ * For this we create a virtual node in the {@code StreamGraph} that
holds the side-output
+ * {@link org.apache.flink.util.OutputTag}.
+ *
+ * @see org.apache.flink.streaming.api.graph.StreamGraphGenerator
+ */
+ private <T> Collection<Integer>
transformSideOutput(SideOutputTransformation<T> sideOutput) {
+ StreamTransformation<T> input = sideOutput.getInput();
+ Collection<Integer> resultIds = transform(input);
+
+
+ // the recursive transform might have already transformed this
+ if (alreadyTransformed.containsKey(sideOutput)) {
+ return alreadyTransformed.get(sideOutput);
+ }
+
+ List<Integer> virtualResultIds = new ArrayList<>();
+
+ for (int inputId : resultIds) {
+ int virtualId = StreamTransformation.getNewNodeId();
+ streamGraph.addVirtualSideOutputNode(inputId,
virtualId, sideOutput.getOutputTag());
+ virtualResultIds.add(virtualId);
+ }
+ return virtualResultIds;
+ }
+
+
--- End diff --
Leave only one empty line.
> Side Outputs in Flink
> ---------------------
>
> Key: FLINK-4460
> URL: https://issues.apache.org/jira/browse/FLINK-4460
> Project: Flink
> Issue Type: New Feature
> Components: Core, DataStream API
> Affects Versions: 1.2.0, 1.1.3
> Reporter: Chen Qin
> Assignee: Chen Qin
> Labels: latearrivingevents, sideoutput
>
> https://docs.google.com/document/d/1vg1gpR8JL4dM07Yu4NyerQhhVvBlde5qdqnuJv4LcV4/edit?usp=sharing
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