apache / apache/beam

The DirectRunner should interact more directly with SplittableDoFn

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direct improvement P3 runners
Dominant language
Java
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Description

The runner has the capability to more accurately use the available interactions with SplittableDoFn. It should implement the transform as a primitive rather than using state and timers to emulate one.

Imported from Jira [BEAM-1710](https://issues.apache.org/jira/browse/BEAM-1710). Original Jira may contain additional context.
Reported by: tgroh.

Contributor guide

Open the contributing guide

Research direction

Start by reading the DirectRunner handling for SplittableDoFn and how it currently uses state and timers to emulate the transform. Determine the primitive interaction required and verify that DirectRunner uses it directly without the emulation path.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
data-engineering
Issue type
Refactor
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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