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https://issues.apache.org/jira/browse/FLINK-21696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17305560#comment-17305560
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David Anderson commented on FLINK-21696:
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[~giackgamba] Thank you for catching this. It does indeed appear that the scala
example was only partially updated.
I've assigned this ticket to you, and will watch for a PR.
> scala code in "Writing WatermarkGenerators" documentation missing/deprecated
> ----------------------------------------------------------------------------
>
> Key: FLINK-21696
> URL: https://issues.apache.org/jira/browse/FLINK-21696
> Project: Flink
> Issue Type: Improvement
> Components: Documentation
> Reporter: giackgamba
> Assignee: giackgamba
> Priority: Minor
>
> Hi all,
> I belive the scala code in the "Writing a Periodic WatermarkGenerator" and
> "Writing a Punctuated WatermarkGenerator" sections ([Event Time -> Generating
> Watermark|https://ci.apache.org/projects/flink/flink-docs-master/docs/dev/datastream/event-time/generating_watermarks/#writing-watermarkgenerators])
> is outdated/wrong.
> And it's also missing in the previous section "Writing WatermarkGenerators".
> It still show how to extend the deprecated
> {{AssignerWithPunctuatedWatermarks}} and {{AssignerWithPeriodicWatermarks}}
> classes. Moreover it uses undefined arguements ({{output}}) (not sure if this
> was working before, I'm pretty new to Flink).
> If it's alright I can put up a PR with the scala code on how to extend
> {{WatermarkGenerator}} class and some comment.
> Also sorry if I misplaced this Issue, feel free to improve/correct
> Giack
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