Software Architecture Concepts
Event-Driven Architecture
Entity | Description |
---|---|
Events | Notification of an action |
Producers | Components/Services that generate or publish messages |
Consumers | Components/Services that subscribe or consume messages |
Event Bus | Central hub that facilitates communication |
PROS | CONS |
---|---|
Loose Coupling | Higher Complexity |
Easier Scalability | Harder Testing and Debugging |
Service Resilience | Possible eventual Inconsistency |
Retriable Process | Challenging Obersavability |
Real-time data flow | Need mindset shift |
Use Cases
- e-commerce : order place, inventory update, trigger shipping, log analytics
- social media :
Best Practices
- Define clear event schemas
- Make consumer idempotent - receive same event more than once, In distributed systems - duplicate can and will happen
- if consumer processes order event twice and ships 2 packages then its a costly bug
- Implement Robust Error Handling - use retries, dead-letter queue or fallback logic to prevent cascading failures
- Monitor and log your events - track flow of events, how long things take and capture failures
- helps indebugging, performance tuning and even security monitoring