[GitHub] flink issue #2124: [FLINK-3647] Change StreamSource to use Processing-Time C...

[aljoscha <gi...@git.apache.org>]

Github user aljoscha commented on the issue:

    https://github.com/apache/flink/pull/2124
  
    This looks very good! I just have a few minor comments:
    
    * It's very good that you fixed typos and added comments/Javadoc to previously undocumented code. I would like to see them as a separate PR, though, and keep this PR only to the feature mentioned in the Jiras. 
    
    * You added `TestTimeServiceProvider` in two tests. I think it makes sense to move this to the same package as `DefaultTimerService` and clearly mark it as being for testing only. On a related note, it might make sense to normalize the names, right now there is `*TimeServiceProvider` and `*TimerService`.
    
    * You added the additional method `registerTimer(final long timestamp, final Runnable target)`. I imagine it is because the sources register their watermark timers as a `Runnable`. I think it would be better to keep having only `Triggerable` here. The watermark emitters should also work as a `Triggerable`.



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