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https://issues.apache.org/jira/browse/FLINK-36938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17907367#comment-17907367
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Zakelly Lan commented on FLINK-36938:
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Merge 7fa4f78 into master
> Provide hooks before and after the watermark processing
> -------------------------------------------------------
>
> Key: FLINK-36938
> URL: https://issues.apache.org/jira/browse/FLINK-36938
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Async State Processing
> Reporter: Zakelly Lan
> Assignee: Zakelly Lan
> Priority: Major
> Labels: pull-request-available
>
> We have rewrite the `processWatermark` in abstract operators for async state
> processing. The sub-classes need a proper hook for doing something right
> before the watermark processing and right after the watermark emit.
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