ASF GitHub Bot commented on BEAM-646:

Github user asfgit closed the pull request at:


> Get runners out of the apply()
> ------------------------------
>                 Key: BEAM-646
>                 URL: https://issues.apache.org/jira/browse/BEAM-646
>             Project: Beam
>          Issue Type: Improvement
>          Components: 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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