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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-646) Get runners out of the apply()
Date Mon, 13 Feb 2017 17:59:41 GMT

    [ https://issues.apache.org/jira/browse/BEAM-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864094#comment-15864094
] 

ASF GitHub Bot commented on BEAM-646:
-------------------------------------

GitHub user tgroh opened a pull request:

    https://github.com/apache/beam/pull/1995

    [BEAM-646] Add ReplaceOutputs to PTransformOverrideFactory

    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 maps the outputs produced by applying a Replacement PTransform to
    the outputs produced by the original PTransform.

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

    $ git pull https://github.com/tgroh/beam replacement_output

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

    https://github.com/apache/beam/pull/1995.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 #1995
    
----
commit f46459d3179c7d3aaa675bff2f88e15fca1ae883
Author: Thomas Groh <tgroh@google.com>
Date:   2017-02-09T19:11:23Z

    Add ReplaceOutputs to PTransformOverrideFactory
    
    This maps the outputs produced by applying a Replacement PTransform to
    the outputs produced by the original PTransform.

----


> Get runners out of the apply()
> ------------------------------
>
>                 Key: BEAM-646
>                 URL: https://issues.apache.org/jira/browse/BEAM-646
>             Project: Beam
>          Issue Type: Improvement
>          Components: beam-model-runner-api, sdk-java-core
>            Reporter: Kenneth Knowles
>            Assignee: Thomas Groh
>
> Right now, the runner intercepts calls to apply() and replaces transforms as we go. This
means that there is no "original" user graph. For portability and misc architectural benefits,
we would like to build the original graph first, and have the runner override later.
> Some runners already work in this manner, but we could integrate it more smoothly, with
more validation, via some handy APIs on e.g. the Pipeline object.



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