Thomas Groh created BEAM-4240:
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Summary: Implement the limited set of portable primitives in the
Java DirectRunner
Key: BEAM-4240
URL: https://issues.apache.org/jira/browse/BEAM-4240
Project: Beam
Issue Type: New Feature
Components: runner-direct
Reporter: Thomas Groh
Assignee: Thomas Groh
This is Flatten, Impulse, GroupByKeyOnly, GroupAlsoByWindow (for the
implementation of the DirectRunner), and {{ExecutableStage}}
{{Flatten}} and {{Impulse}} are straightforwards. {{GroupByKeyOnly}} requires
extracting the runner-implementation of the PCollection's {{KeyCoder}}, and
{{GroupAlsoByWindow}} and {{ExecutableStage}} both have specific concerns and
are tracked independently
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