التنسيق الذاتي (Choreography)

في هذا الدرس

coordinate a saga through events only.

الموضوعات المخطط لها

• Each service reacts to events and emits its own: OrderPlaced → StockReserved → PaymentAuthorized.
• No central owner, low coupling, easy for 2 to 3 steps.
• The process lives nowhere in code: it is hard to see, test, and change as it grows.
• Risk of cyclic dependencies and "who handles the failure?" confusion.
• Add a correlation id (order id) to every event for tracing.