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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-310) Exercise splitIntoBundles/generateInitialSplits in the Direct Runner
Date Fri, 23 Sep 2016 23:38:21 GMT

    [ https://issues.apache.org/jira/browse/BEAM-310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15517886#comment-15517886
] 

ASF GitHub Bot commented on BEAM-310:
-------------------------------------

GitHub user tgroh opened a pull request:

    https://github.com/apache/incubator-beam/pull/996

    [BEAM-310] Add RootTransformEvaluatorFactory, Use for Reads

    Be sure to do all of the following to help us incorporate your contribution
    quickly and easily:
    
     - [ ] Make sure the PR title is formatted like:
       `[BEAM-<Jira issue #>] Description of pull request`
     - [ ] Make sure tests pass via `mvn clean verify`. (Even better, enable
           Travis-CI on your fork and ensure the whole test matrix passes).
     - [ ] Replace `<Jira issue #>` in the title with the actual Jira issue
           number, if there is one.
     - [ ] If this contribution is large, please file an Apache
           [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.txt).
    
    ---
    
    This is an extension of TransformEvaluatorFactory that applies to
    transforms that can be the root transform of a Pipeline. They produce
    bundles which provide an impulse to the PTransforms that are at the root
    of the Pipeline.
    
    Add an ImpulseBundle implementation to represent this impulse as a
    bundle that is not part of a PCollection.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/tgroh/incubator-beam root_initial_splits

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/incubator-beam/pull/996.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #996
    
----
commit 8670bf7995639a95a3f2c3205b063f9c64ff18b9
Author: Thomas Groh <tgroh@google.com>
Date:   2016-09-23T15:52:47Z

    Add RootTransformEvaluatorFactory, Use for Reads
    
    This is an extension of TransformEvaluatorFactory that applies to
    transforms that can be the root transform of a Pipeline. They produce
    bundles which provide an impulse to the PTransforms that are at the root
    of the Pipeline.
    
    Add an ImpulseBundle implementation to represent this impulse as a
    bundle that is not part of a PCollection.

----


> Exercise splitIntoBundles/generateInitialSplits in the Direct Runner
> --------------------------------------------------------------------
>
>                 Key: BEAM-310
>                 URL: https://issues.apache.org/jira/browse/BEAM-310
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-direct
>            Reporter: Thomas Groh
>            Assignee: Thomas Groh
>
> BoundedSource#splitIntoBundles and UnboundedSource#generateInitialSplits are the methods
by which sources can be accessed in parallel. Exercising these methods allows reads (and all
transforms downstream) to be executed in parallel both pre and post a GroupByKey



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