[jira] [Created] (FLINK-4920) Add a Scala Function Gauge

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-4920:
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             Summary: Add a Scala Function Gauge
                 Key: FLINK-4920
                 URL: https://issues.apache.org/jira/browse/FLINK-4920
             Project: Flink
          Issue Type: Improvement
          Components: Metrics, Scala API
            Reporter: Stephan Ewen


A useful metrics utility for the Scala API would be to add a Gauge that obtains its value by calling a Scala Function0.

That way, one can add Gauges in Scala programs using Scala lambda notation or function references.



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