[jira] [Created] (FLINK-19265) Simplify handling of 'NoMoreSplitsEvent'

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-19265:
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             Summary: Simplify handling of 'NoMoreSplitsEvent'
                 Key: FLINK-19265
                 URL: https://issues.apache.org/jira/browse/FLINK-19265
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / Common
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 1.12.0


Split assignment events are treated specially by the source API. Users do not create them directly but call methods on the contexts to assign splits.

The {{NoMoreSplitsEvent}} is in contrast to that a custom user event and needs to be handled like a custom event, when sent by enumerators and received by the readers.

That seems a bit confusing and inconsistent, given that NoMoreSplits is essential for all bounded stream use cases and is on the same level as the {{AddSplitEvent}}.

I suggest that we treat "no more splits" similarly, by having either a custom method or a custom "SplitAssignment" on the context and reader.

[~jqin] Curious what would be your take on this.



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