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https://issues.apache.org/jira/browse/BEAM-1316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15937767#comment-15937767
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Kenneth Knowles edited comment on BEAM-1316 at 3/23/17 5:42 AM:
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I'm going to abuse existing issues to describe this:
1. {{@StartBundle}} should not be able to output
2. New {{DoFn}} should have a way to output to a specific window
3. {{@FinishBundle}} should be required to specify the window (or be unable to
output)
Otherwise we have a bunch of quasi-dupes.
was (Author: kenn):
I'm going to abuse existing issues to describe this:
1. {{@StartBundle}} should not be able to output
2. New {{DoFn}} should have a way to output to a specific window
3. {{@FinishBundle}} should be required to specify the window
Otherwise we have a bunch of quasi-dupes.
> DoFn#startBundle should not be able to output
> ---------------------------------------------
>
> Key: BEAM-1316
> URL: https://issues.apache.org/jira/browse/BEAM-1316
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Reporter: Thomas Groh
>
> While within startBundle and finishBundle, the window in which elements are
> output is not generally defined. Elements must always be output from within a
> windowed context, or the {{WindowFn}} used by the {{PCollection}} may not
> operate appropriately.
> startBundle and finishBundle are suitable for operational duties, similarly
> to {{setup}} and {{teardown}}, but within the scope of some collection of
> input elements. This includes actions such as clearing field state within a
> DoFn and ensuring all live RPCs complete successfully before committing
> inputs.
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