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Aljoscha Krettek commented on FLINK-4064: ----------------------------------------- Technically, that can be a problem yes. In the {{WindowOperator}}, however, we ensure that nothing is called concurrently by using locks. The other option I see is to extends the Trigger API with {{open()/close()}} methods. I'd like to avoid that, if possible. > Allow calling MetricGroup methods multiple times > ------------------------------------------------ > > Key: FLINK-4064 > URL: https://issues.apache.org/jira/browse/FLINK-4064 > Project: Flink > Issue Type: Sub-task > Components: Metrics > Affects Versions: 1.1.0 > Reporter: Aljoscha Krettek > > Right now, the methods on {{MetricGroup}} can only be called once, i.e. I > have to keep the result of {{MetricGroup.counter(name)}} and use that to > report metrics. For some cases, such as adding metrics support in triggers, > it is necessary to allow calling a method multiple times and return the same > metric object. On the first call, a new metric object would be created, > subsequent calls would return that metric object. -- This message was sent by Atlassian JIRA (v6.3.4#6332)