[jira] [Created] (FLINK-14410) Retrieve CharacterFilter once after registration

[Shang Yuanchun (Jira)]

Chesnay Schepler created FLINK-14410:
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             Summary: Retrieve CharacterFilter once after registration
                 Key: FLINK-14410
                 URL: https://issues.apache.org/jira/browse/FLINK-14410
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Metrics
            Reporter: Chesnay Schepler
            Assignee: Chesnay Schepler
             Fix For: 1.10.0


Reporters can use a {{CharacterFilter}} to remove/replace characters when assembling metric identifiers. Currently the reporter pass this filter in every call to scope-related methods on the {{MetricGrou}}. We could streamline the {{MetricScope}} API proposed in FLINK-14350 if instead we retrieved this filter once after the reporter is initialized.
This would furthermore prevent subtle bugs if reporters use varying filters; due to the caching of scopes only the first filter would truly be applied to the scope.



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