Bound workshop hold cleanup batches and expose progress
Cleanup scans every historical hold on each tick. Add bounded cursor batches with repeat-safe transitions.
- Focused work estimate
- 2h + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Batch processing · Recovery
Estimated field mix
- Database engineering50%
- Data engineering30%
- Performance engineering20%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
Fictional craft studio Maple offers workshop seats. Implement synthetic reservations without payments or real booking services.
Setup prerequisites
- Create synthetic workshops with small capacities.
- Implement local transactional hold storage and injected clocks.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- CAUCT-101 · Specify workshop seat counts without negative availability
- CAUCT-102 · Validate workshop hold quantities before storage
- CAUCT-103 · Create workshop holds atomically under contention
- CAUCT-104 · Scope workshop hold lookup and cancellation to its owner
- CAUCT-105 · Confirm workshop holds only before the expiry boundary
- CAUCT-106 · Replay workshop hold requests with the same idempotency key
- CAUCT-107 · Publish workshop availability changes only after commit
- CAUCT-108 · Rebuild workshop availability after a missed realtime update
Acceptance criteria
- Each batch has fixed limit
- Concurrent confirms are preserved
- Restart resumes without skipping eligible rows
Implementation constraints
- Use indexed expiry selection in the adapter design.
Verification to include
- Clean several batches
- Confirm a selected hold concurrently
Deliverables
- Cleanup worker contract and restart cases
Rollout and recovery
Pause cleanup and rely on read-time expiry until repaired.
Value of the work
For the engineer: Practice contention, expiry and truthful realtime projections.
For the team: Inspect whether concurrent clients avoid overselling and recover uncertain results.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.