[jira] [Created] (FLINK-5716) Make streaming SourceContexts aware of source idleness

[Shang Yuanchun (Jira)]

Tzu-Li (Gordon) Tai created FLINK-5716:
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             Summary: Make streaming SourceContexts aware of source idleness
                 Key: FLINK-5716
                 URL: https://issues.apache.org/jira/browse/FLINK-5716
             Project: Flink
          Issue Type: Sub-task
          Components: Streaming
            Reporter: Tzu-Li (Gordon) Tai
            Assignee: Tzu-Li (Gordon) Tai


This task comes after FLINK-5017, which adds the new element {{StreamStatus}} to be incorporated with watermark progression logic.

This task tracks the implementation of source idleness awareness and status toggling in {{SourceFunction.SourceContext}}s.

The source contexts should work on an "idle interval", where we determine the containing {{SourceStreamTask}} to be idle if no new records / watermarks have been collected in-between 2 continuous checks. (default value is 0. Letting this value be user configurable is tracked by FLINK-5018).



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