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Posted to dev@apex.apache.org by "Sandesh (JIRA)" <ji...@apache.org> on 2016/05/25 20:48:12 UTC

[jira] [Updated] (APEXCORE-247) Implement DefaultDelayOperator

     [ https://issues.apache.org/jira/browse/APEXCORE-247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sandesh updated APEXCORE-247:
-----------------------------
    Assignee:     (was: Sandesh)

> Implement DefaultDelayOperator
> ------------------------------
>
>                 Key: APEXCORE-247
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-247
>             Project: Apache Apex Core
>          Issue Type: Sub-task
>            Reporter: David Yan
>
> This class should extend SimpleDelayOperator.  It writes the tuples in the window before each checkpoint to a DFS-backed WAL, and it overrides firstWindow() to read from the WAL and emits the tuples at recovery.
> Thomas has suggested leveraging IdempotentStorageManager in Malhar for the WAL implementation.



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