GitHub user kennknowles opened a pull request:
https://github.com/apache/incubator-beam/pull/697
[BEAM-362] [BEAM-25] Implement GroupAlsoByWindows by directly providing
StateInternals
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This PR adds `StateInternalsFactory` which is a map from a key to
`StateInternals`. Since `GroupAlsoByWindow` is now truly an implementation
detail of `GroupByKey`(`ViaGroupByKeyOnly`), we can just provide it the state
access that it needs.
This is a step both in the progress of moving runner implementation details
out of the SDK and also in providing a better user-facing state API.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kennknowles/incubator-beam GABW-stateInternals
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-beam/pull/697.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 #697
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commit 04b1ca8e1caf1105e30c90d649c9ba92985684dd
Author: Kenneth Knowles <[email protected]>
Date: 2016-07-18T20:56:22Z
Introduce StateInternalsFactory
This class vends a StateInternals for a particular key.
Various DoFns that access StateInternals via ProcessContext
will be ported to instead accept a StateInternalsFactory.
The StateInternalsFatory must be provided by the runner
to enable provisioning of the appropriate run-time
StateInternals.
commit 24d9309f952548edc5b0669306bef2347274e2e8
Author: Kenneth Knowles <[email protected]>
Date: 2016-07-18T21:33:58Z
Port runners to use GroupAlsoByWindows via StateInternalsFactory
commit 7ebde3816dc021057507229ff736305f0c2956df
Author: Kenneth Knowles <[email protected]>
Date: 2016-07-20T02:16:13Z
Tidy WriteWithShardingFactory
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