yigit/android-priority-jobqueue

Class UUID doesnt match - Handling app updates

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#280 opened on Nov 10, 2016

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help wanted

Description

Just trying to wrap my head around the following scenario:

User uses my app while offline, creates different system entities which in turn create jobs which require network and are therefore persisted to storage to wait until we get network access.

User turns off app.

User enables network, receives an app update. Update includes changed class files. User opens app, now triggering the jobs to run but now fail due to the Class UUID no longer matching to what was initially there when it was persisted.

What is the correct way to handle a situation like that?

Contributor guide

Tech stack
javaandroid
Domain
mobile
Issue type
research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
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.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Android job queue basicsSerialization conceptsApp update lifecycle
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate how android priority jobqueue persists jobs and handles serialization, specifically the class UUID used for each job class. The issue describes a scenario where an app update changes class files, causing a UUID mismatch for persisted jobs. To resolve, a versioning or migration mechanism is needed. Look into the library's Job serialization code and consider proposing a solution like adding a version field to job data or implementing a job deserialization fallback. Also review any existing documentation or comments (the single comment may provide insight) and check if the maintainer has addressed similar questions.