apache/beam

ValueState could use an initial/default value

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#18,174 opened on Jun 3, 2022

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Description

In writing example state code with ValueState there is almost always a use of firstNonNull(state.read(), defaultValue). It would be nice to bake this into the declaration.

Imported from Jira BEAM-1335. Original Jira may contain additional context. Reported by: kenn.

Contributor guide

Research direction
Study the ValueState interface and its implementations, then propose a way to add an initial/default value parameter to the declaration.
Tech stack
java
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaApache Beam SDK
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70