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Learning Objectives & Key Takeaways
0 / 4 Completed- Understand Event-Driven Architecture core architecture and runtime execution model
- Audit real-world latency, throughput benchmarks, and memory footprint
- Implement zero-downtime deployment patterns with resilience guards
- Verify code snippets and architect blueprints against production SLOs
Practise it next
Event-Driven Architecture interview questions, quiz and handbook in your Learning Dashboard
What you will learn
- Queues spread work over time; pub/sub fans one event out to many consumers.
- Most systems deliver at least once, so consumers must be idempotent.
- The outbox pattern publishes events reliably with database changes.
Why send messages instead of calling services
When an order is placed, you may need to send an email, update analytics, issue an invoice and notify the warehouse. Calling each service in the request makes checkout slow and fragile: one slow service delays everyone.
Publishing an 'order placed' event lets each consumer react in its own time, retry on failure and scale independently.
In the rest of this story
- Queues, topics and delivery guarantees
- Outbox plus an idempotent consumer
- Trade-offs to discuss
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