[jira] [Created] (FLINK-12478) Decompose monolithic run-loops in StreamTask implementations into step-wise calls

[Shang Yuanchun (Jira)]

Stefan Richter created FLINK-12478:
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             Summary: Decompose monolithic run-loops in StreamTask implementations into step-wise calls
                 Key: FLINK-12478
                 URL: https://issues.apache.org/jira/browse/FLINK-12478
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Operators
            Reporter: Stefan Richter
            Assignee: Stefan Richter
             Fix For: 1.9.0


As a first step to introduce a mailbox model, we need to split up the monolithic loops in stream task implementations into stepwise actions. The step-wise actions are still run in a loop, but give us the opportunity to check the mailbox between each step in the future. This mailbox will be added to the loop in a later subtasks.

We also exclude breaking the stream sources into steps because this is not possible before FLIP-27 is implemented and we need to be compatible to the current source function interface.



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