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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (BEAM-2899) Universal Local Runner
Date Thu, 30 Nov 2017 03:50:00 GMT


ASF GitHub Bot commented on BEAM-2899:

tgroh opened a new pull request #4197: [BEAM-2899] Port DataBufferingOutboundObserver
   Move to sdks/java/fn-execution. The outbound observers are generally the
   same on both ends.
   Introduce a CloseableFnDataReceiver, and remove 'Closeable' from the
   default FnDataReceiver.
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> Universal Local Runner
> ----------------------
>                 Key: BEAM-2899
>                 URL:
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-core
>            Reporter: Henning Rohde
>            Assignee: Thomas Groh
>              Labels: portability
> To make the portability effort tractable, we should implement a Universal Local Runner
(ULR) in Java that runs in a single server process plus docker containers for the SDK harness
containers. It would serve multiple purposes:
>   (1) A reference implementation for other runners. Ideally, any new feature should be
implemented in the ULR first.
>   (2) A fully-featured test runner for SDKs who participate in the portability framework.
It thus complements the direct runners.
>   (3) A test runner for user code that depends on or customizes the runtime environment.
For example, a DoFn that shells out has a dependency that may be satisfied on the user's desktop
(and thus works fine on the direct runner), but perhaps not by the container harness image.
The ULR allows for an easy way to find out.
> The Java direct runner presumably has lots of pieces that can be reused.

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