idempotent_handler

Overview ¶

Package main demonstrates idempotent handler patterns for dureq.

dureq provides duplicate-suppressed execution (per-run lock), but external side effects (API calls, DB writes, emails) can still execute more than once if a worker crashes after the side effect but before completion.

This example shows three idempotency strategies:

1. UniqueKey — prevent duplicate enqueue at the source
2. RequestID — idempotent enqueue (same request returns cached job)
3. Handler-level idempotency — use a business key inside the handler