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https://issues.apache.org/jira/browse/FLINK-13148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17323231#comment-17323231
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Flink Jira Bot commented on FLINK-13148:
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This issue is assigned but has not received an update in 7 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> Expose WindowedStream.sideOutputLateData() from CoGroupedStreams
> ----------------------------------------------------------------
>
> Key: FLINK-13148
> URL: https://issues.apache.org/jira/browse/FLINK-13148
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Affects Versions: 1.9.0
> Reporter: Congxian Qiu
> Assignee: Congxian Qiu
> Priority: Major
> Labels: stale-assigned
>
> As FLINK-10050 supported {{alloedLateness}}, but we can not get the side
> output containing the late data, this issue wants to fix it.
> For implementation, I want to add an input parameter {{OutputTag}} in
> {{WithWindow}} as following
> {code:java}
> protected WithWindow(DataStream<T1> input1,
> DataStream<T2> input2,
> KeySelector<T1, KEY> keySelector1,
> KeySelector<T2, KEY> keySelector2,
> TypeInformation<KEY> keyType,
> WindowAssigner<? super TaggedUnion<T1, T2>, W> windowAssigner,
> Trigger<? super TaggedUnion<T1, T2>, ? super W> trigger,
> Evictor<? super TaggedUnion<T1, T2>, ? super W> evictor,
> Time allowedLateness,
> OutputTage<TaggedUnion<T1, T2>> outputTag) {
> ...
> }
> {code}
> and add a function sideOutputLateData(OutputTag<T> outputTag) in
> {{WithWindow}}
> {code:java}
> public WithWindow<T1, T2, KEY, W>
> sideOutputLateData(OutputTag<TaggedUnion<T1, T2>> outputTag) {
> ...
> }
> {code}
> In {{WithWindow#apply}} will add outputTag if it is not null
> {code:java}
> public <T> DataStream<T> apply(CoGroupFunction<T1, T2, T> function,
> TypeInfomation<T> resultType) {
> ...
> if (outputTag != null) {
> windowedStream.sideOutputLateData(outputTag);
> }
> ...
> }{code}
> The same will apply to {{JoinedStreams}}
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