GitHub user kennknowles opened a pull request:
https://github.com/apache/beam/pull/2847
[BEAM-818,BEAM-828] Make tempLocation an inaccessible ValueProvider
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This is my first foray into `ValueProvider` and `PipelineOptions`
excitement. The goal: allow users to access the `tempLocation` that they
specify but make it inaccessible to `PTransform.expand(..)` implementations.
The natural way to do this would be to clone and alter the pipeline
options, something that runners also ought to be doing when they tweak them
like `TestDataflowRunner` does. I am informed this is not possible or feasible
in a short timeframe.
So this is a hack that might not actually work that lets `get()` succeed
but makes `isAccessible()` false. Throwing it out there as a strawman as I
don't see a way to do this correctly given today's constraints.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kennknowles/beam runtime-ValueProvider
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/beam/pull/2847.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 #2847
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commit ebfb87a93448b05d1bdac1e919d2d83d41f00405
Author: Kenneth Knowles <k...@google.com>
Date: 2017-05-02T21:36:52Z
Make tempLocation an inaccessible ValueProvider
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