becketqin opened a new pull request #7772: [FLINK-11681] [Metrics] Add a flink-metrics-common module to combine the metric definition an… URL: https://github.com/apache/flink/pull/7772 …d management. ## What is the purpose of the change This PR introduce a flink-metrics-common module to host the AbstractMetric class. It centralizes the metric definition for a component and combines the definition with the metric management. This is the first PR for FLIP-33, although it has not introduced any standard metrics yet. The PRs in the next step will do. ## Brief change log This PR introduce a `flink-metrics-common` module to host the `AbstractMetric` class. ## Verifying this change This change added tests and can be verified as follows: - Added unit tests for `MetricDef`, `MetricSpec` and `AbstractMetrics` ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (no) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no) - The serializers: (no) - The runtime per-record code paths (performance sensitive): (no) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no) - The S3 file system connector: (no) ## Documentation - Does this pull request introduce a new feature? (no) - If yes, how is the feature documented? (not applicable)
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