AWS Event‑Driven Architecture Guide
Implement event‑driven architecture with SNS/SQS and Lambda.
Set up EventBridge and Lambda functions.
Summary
The guide outlines core AWS patterns: Event‑Driven, Microservices, Monolithic, Choreography vs Orchestration, and Fanout. It explains how to use EventBridge, SNS, SQS, and Kinesis for event routing, and how to design stateless vs stateful services with Lambda, DynamoDB, and ElastiCache.
It includes tables comparing services, best practices for long polling, exponential backoff with jitter, circuit breakers, and idempotency. The final section walks through building an order‑processing system with API Gateway, Lambda, EventBridge, and consumer Lambdas.
The article is a practical reference for teams building scalable, resilient serverless applications on AWS.
Key takeaways include using SQS long polling, implementing exponential backoff, and externalizing state.
Key changes
- Use EventBridge for complex routing
- Use SNS for fan‑out pub/sub
- Use SQS for point‑to‑point queues
- Apply long polling to reduce costs
- Implement exponential backoff with jitter
- Use circuit breakers for resilience
- Externalize state to DynamoDB or Redis