عرض عملي: تقسيم OrderPlaced إلى حدثين عبر خمسة مستهلكين

خطوة بخطوة

1. Map the five consumers and what each reads from OrderPlaced.
2. Define the new events (for example OrderAccepted and PaymentRequested) and the compatibility mode.
3. Planned mistake: announce and remove the old event in one release. Fix: dual-publish both forms and track the old subject's consumer lag to zero.
4. Sequence the consumer migrations with owners, dates, and contract tests.
5. Define rollback for each step.
6. Verify no consumers remain, then retire the old event.