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From xccui <...@git.apache.org>
Subject [GitHub] flink pull request #4530: [FLINK-7245] [stream] Support holding back waterma...
Date Fri, 11 Aug 2017 17:30:32 GMT
GitHub user xccui opened a pull request:


    [FLINK-7245] [stream] Support holding back watermarks with static delays

    ## What is the purpose of the change
    *This pull request aims to allow the operators to support holding back watermarks with
**static** delays.*
    ## Brief change log
      - *Introduce a new method `getWatermarkToEmit(Watermark inputWatermark)`, which allows
to generate a new watermark with different timestamp before emitting it.*
      - *Add two operators `KeyedProcessOperatorWithWatermarkDelay` and `KeyedCoProcessOperatorWithWatermarkDelay`
that support holding back watermarks with static delays.*
    ## Verifying this change
    This change  is verified by two new test classes `KeyedProcessOperatorWithWatermarkDelayTest`
and `KeyedCoProcessOperatorWithWatermarkDelayTest`. They test whether watermarks received
by the two added operators can be held back with the given delays and the provided delays
are non-negative.
    ## Does this pull request potentially affect one of the following parts:
      - Dependencies (does it add or upgrade a dependency): (**no**)
      - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (**no**)
      - The serializers: (**no**)
      - The runtime per-record code paths (performance sensitive): (**no**)
      - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing,
Yarn/Mesos, ZooKeeper: (**no**)
    ## Documentation
      - Does this pull request introduce a new feature? (**yes**)
      - If yes, how is the feature documented? (**JavaDocs**)

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/xccui/flink FLINK-7245

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #4530
commit a24a11522af54c547d014d30adbefa23997d0f8d
Author: Xingcan Cui <xingcanc@gmail.com>
Date:   2017-08-09T12:54:16Z

    [FLINK-7245] [stream] Support holding back watermarks with static delays

commit f730ab45c88f8bcbc27e411901e27dee84aa26b2
Author: Xingcan Cui <xingcanc@gmail.com>
Date:   2017-08-11T16:15:53Z

    Refine codes


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