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https://issues.apache.org/jira/browse/BEAM-2899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257845#comment-16257845
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ASF GitHub Bot commented on BEAM-2899:
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Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/4133
> Universal Local Runner
> ----------------------
>
> Key: BEAM-2899
> URL: https://issues.apache.org/jira/browse/BEAM-2899
> 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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