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From kennknowles <...@git.apache.org>
Subject [GitHub] incubator-beam pull request: Port batch Flink GroupByKey to GroupB...
Date Tue, 03 May 2016 19:00:34 GMT
GitHub user kennknowles opened a pull request:

    https://github.com/apache/incubator-beam/pull/277

    Port batch Flink GroupByKey to GroupByKeyViaGroupByKeyOnly

    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).
    
    ---
    
    These are some moderately useful preliminaries that came out of a quick attempt to try
out the `RunnableOnService` tests with the Flink runner. The attempt got a bit stuck, but
I figured these alteration might be useful either way.
    
    If you are curious, translation seems to just not be invoked in my configuration, which
you can see in the next couple commits on my branch [flink-integration] (https://github.com/kennknowles/incubator-beam/commits/flink-integration)

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

    $ git pull https://github.com/kennknowles/incubator-beam flink-GBK

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

    https://github.com/apache/incubator-beam/pull/277.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 #277
    
----
commit b1774d02e35737128e99730538c448f1ef3e955b
Author: Kenneth Knowles <klk@google.com>
Date:   2016-05-02T21:28:05Z

    Port Flink batch translator to GroupByKeyViaGroupByKeyOnly
    
    The current Flink batch translation ignores windows. This is consistent
    with the requirements of GroupByKeyOnly. This change ports the runner
    to the expansion of GroupByKey to a GroupByKeyOnly operation followed
    by a GroupAlsoByWindow operation.

commit 343638763aa3d6ebe2441d442d8ef99c52326a31
Author: Kenneth Knowles <klk@google.com>
Date:   2016-05-02T21:29:30Z

    Add temporary Window.Bound translator to Flink batch
    
    This adds a Window.Bound translator that matches Flink streaming. It
    depends on deprecated privileged methods of DoFn.ProcessContext. But
    this is the status quo for most runners anyhow, and we have a plan
    for migrating everything away from it.
    
    This restores windowing support to the batch runner, and opens
    the door to using GroupByKeyViaGroupByKeyOnly, for which Flink already
    has the needed capabilities.

----


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