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https://issues.apache.org/jira/browse/FLINK-4367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15436334#comment-15436334
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ramkrishna.s.vasudevan commented on FLINK-4367:
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So it is better to remove the TimeStampASsigner interface from the two classes
AssignerWithPunctuatedWatermarks and AssignerWithPeriodicWatermarks ?
So for 2.0 we will do this and for the lower branch versions we will mark it as
@Deprecated and say that in future from 2.0 they will not be implementing
TimeStampAssigner - [~rmetzger]?
> Offer separate API for watermark generation and timestamp extraction
> --------------------------------------------------------------------
>
> Key: FLINK-4367
> URL: https://issues.apache.org/jira/browse/FLINK-4367
> Project: Flink
> Issue Type: Sub-task
> Components: DataStream API
> Affects Versions: 1.1.0
> Reporter: Robert Metzger
> Fix For: 2.0.0
>
>
> Right now, the {{AssignerWithPunctuatedWatermarks}} and
> {{AssignerWithPeriodicWatermarks}} interfaces also require implementing a
> {{TimestampAssigner}}.
> For cases where the source emits records with timestamps, its not necessary
> to extract timestamps again from the records, we just want to generate
> watermarks.
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