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From "Davor Bonaci (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-1461) duplication with StartBundle and prepareForProcessing in DoFn
Date Mon, 13 Feb 2017 22:38:41 GMT

    [ https://issues.apache.org/jira/browse/BEAM-1461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864604#comment-15864604
] 

Davor Bonaci commented on BEAM-1461:
------------------------------------

I think what [~tgroh] did make sense. [~tgroh], can you please expand?

> duplication with StartBundle and prepareForProcessing in DoFn
> -------------------------------------------------------------
>
>                 Key: BEAM-1461
>                 URL: https://issues.apache.org/jira/browse/BEAM-1461
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>            Reporter: Xu Mingmin
>            Assignee: Davor Bonaci
>
> There're one annotation `StartBundle`, and one public function `prepareForProcessing`
in DoFn, which are called both before `ProcessElement`. It's confused which one should be
implemented in a subclass.
> The call sequence seems as:
> prepareForProcessing -> StartBundle -> processElement



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