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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (BEAM-53) PubSubIO: reimplement in Java
Date Fri, 20 May 2016 20:05:12 GMT


ASF GitHub Bot commented on BEAM-53:

GitHub user dhalperi opened a pull request:

    [BEAM-53] PubSub: build fixups

    * Always RunWith on a unit test
    * Mockito bugfix for Java 9

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

    $ git pull build-fixups

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

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

    This closes #367
commit 30c3c3b5f6c95c9d9a6febde391558023ccf73bd
Author: Dan Halperin <>
Date:   2016-05-20T20:04:12Z

    PubSub: build fixups
    * Always RunWith on a unit test
    * Mockito bugfix for Java 9


> PubSubIO: reimplement in Java
> -----------------------------
>                 Key: BEAM-53
>                 URL:
>             Project: Beam
>          Issue Type: New Feature
>          Components: runner-core
>            Reporter: Daniel Halperin
>            Assignee: Mark Shields
> PubSubIO is currently only partially implemented in Java: the DirectPipelineRunner uses
a non-scalable API in a single-threaded manner.
> In contrast, the DataflowPipelineRunner uses an entirely different code path implemented
in the Google Cloud Dataflow service.
> We need to reimplement PubSubIO in Java in order to support other runners in a scalable
> Additionally, we can take this opportunity to add new features:
> * getting timestamp from an arbitrary lambda in arbitrary formats rather than from a
message attribute in only 2 formats.
> * exposing metadata and attributes in the elements produced by PubSubIO.Read
> * setting metadata and attributes in the messages written by PubSubIO.Write

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