Event-Driven Microservices
This event-driven microservices diagram separates catalog, order and inventory concerns behind an API gateway. Each service can publish activity to an event bus rather than requiring every downstream function to call it directly. An analytics service receives order information for reporting or operational analysis. The diagram is a compact way to discuss service boundaries and asynchronous communication without representing deployment details, topics or individual message schemas.
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Scenario
Designing a service boundary for an order-oriented product.
Key decisions
- Single entry: Route clients through an API gateway.
- Independent services: Separate catalog, orders and inventory.
- Event sharing: Publish service activity to an event bus.
- Analytics feed: Send order data to analytics.
When to reuse this
Use it to discuss service ownership and event flows before documenting APIs.
Frequently asked questions
What is event-driven microservices architecture?
Why use an event bus?
Should every service use events?
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