[jira] [Created] (FLINK-4775) Simplify access to MetricStore

[Shang Yuanchun (Jira)]

Chesnay Schepler created FLINK-4775:
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             Summary: Simplify access to MetricStore
                 Key: FLINK-4775
                 URL: https://issues.apache.org/jira/browse/FLINK-4775
             Project: Flink
          Issue Type: Improvement
          Components: Metrics, Webfrontend
    Affects Versions: 1.1.2
            Reporter: Chesnay Schepler
            Assignee: Chesnay Schepler
             Fix For: 1.2.0


A few utility methods can be added to the MetricStore, which would make working with it a lot easier.

This includes getXMetricStore(args) methods that, for example, return the appropriate TaskMetricStore, without requiring the accessor to traverse the structure(and do several null checks) themselves.

In addition, a getMetric(name, defaultValue) method would ease the issue of metrics not being updated yet.



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