[jira] [Created] (FLINK-15314) To refactor duplicated code in TaskManagerDetailsHandler#createTaskManagerMetricsInfo

[Shang Yuanchun (Jira)]

lining created FLINK-15314:
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             Summary: To refactor duplicated code in TaskManagerDetailsHandler#createTaskManagerMetricsInfo
                 Key: FLINK-15314
                 URL: https://issues.apache.org/jira/browse/FLINK-15314
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Metrics, Runtime / REST
            Reporter: lining


As [code|[https://github.com/apache/flink/blob/master/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/taskmanager/TaskManagerDetailsHandler.java#L123-L140]] show,  use hard codes to define metrics' name. Could we unify where to register and get metrics? 
 * propose
 ** move  metrics'name define in MetricUtils to MetricNames
 ** the all get the name form MetricNames



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