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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-646) Get runners out of the apply()
Date Wed, 08 Feb 2017 22:39:42 GMT

    [ https://issues.apache.org/jira/browse/BEAM-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15858639#comment-15858639
] 

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

GitHub user tgroh opened a pull request:

    https://github.com/apache/beam/pull/1953

    [BEAM-646] Add Input Reconstruction 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).
    
    ---
    Inputs are only ever provided as expanded representations. Overrides,
    however, may be applied to compressed inputs. Add a method to
    reconstruct the language-specific composite input.

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

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

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

    https://github.com/apache/beam/pull/1953.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 #1953
    
----
commit 024eaca3424705ec0b7bfebb2dea2c9b174b891f
Author: Thomas Groh <tgroh@google.com>
Date:   2017-02-07T17:42:32Z

    Add Input Reconstruction to PTransformOverrideFactory
    
    Inputs are only ever provided as expanded representations. Overrides,
    however, may be applied to compressed inputs. Add a method to
    reconstruct the language-specific composite input.

----


> 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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