[jira] [Created] (FLINK-2406) Abstract BarrierBuffer to an exchangeable BarrierHandler

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-2406:
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             Summary: Abstract BarrierBuffer to an exchangeable BarrierHandler
                 Key: FLINK-2406
                 URL: https://issues.apache.org/jira/browse/FLINK-2406
             Project: Flink
          Issue Type: Sub-task
          Components: Streaming
    Affects Versions: 0.10
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 0.10


We need to make the Checkpoint handling pluggable, to allow us to use different implementations:

  - BarrierBuffer for "exactly once" processing. This inevitably introduces a bit of latency.
  - BarrierTracker for "at least once" processing, with no added latency.



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