Specify transactional report admission with deterministic job identities
A scheduler creates report rows but loses queue publication, leaving accepted work with no execution path.
- Focused work estimate
- 4h + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Transactional outbox · Idempotency
Estimated field mix
- System design40%
- Distributed systems40%
- Database 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
A fictional analytics product lets customers schedule expensive reports at the top of the hour. The API remains available only if report work is admitted and cancelled predictably.
Setup prerequisites
- Create a local scheduler model and synthetic report jobs.
- Use fake execution providers; no customer queries or candidate code run on worker hosts.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Commit admission and outbox fact atomically.
- Bind job identity to schedule occurrence or request key.
- Make repeated dispatch resolve one logical job.
Implementation constraints
- Keep lifecycle authority in the durable service boundary.
Verification to include
- Crash after admission commit and recover dispatch.
- Replay the same scheduled occurrence and count one report.
Deliverables
- Admission/outbox contract and crash probe
Rollout and recovery
Prototype with a fake executor; stop new admission if durable dispatch cannot be recorded.
Value of the work
For the engineer: Practice workload modeling, fairness and cancellation architecture.
For the team: Review controllable operating costs and predictable customer-facing overload behavior.
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.