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https://issues.apache.org/jira/browse/APEXCORE-78?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Weise updated APEXCORE-78:
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Issue Type: New Feature (was: Improvement)
> Pre-Checkpoint Operator Callback
> --------------------------------
>
> Key: APEXCORE-78
> URL: https://issues.apache.org/jira/browse/APEXCORE-78
> Project: Apache Apex Core
> Issue Type: New Feature
> Reporter: Thomas Weise
> Assignee: Pramod Immaneni
> Fix For: 3.3.0
>
>
> There are situations when the operator developer would like to implement
> certain logic to be executed just before the operator gets checkpointed. For
> example, flush file to HDFS. This can be done in endWindow, but then it
> executes unnecessarily even when it's not a checkpoint window. This can be a
> significant optimization for expensive operations such as HDFS flush.
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