Queue Processing Patterns

Purpose

Design safe queue consumers and retries.

Inputs to request

• Queue system and delivery semantics.
• Idempotency requirements.
• Failure modes and retry limits.

Workflow

1. Define idempotency and retry policy.
2. Set visibility timeout and dead-letter routing.
3. Add metrics for lag and failure rates.

Output

• Queue handling checklist.

Quality bar

• Ensure retries do not amplify failures.
• Document poison message handling.