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AWS offers multiple services for event-driven communication, and choosing the right one — or the right combination — is one of the most important architectural decisions you will make. Each service solves a different problem, and production systems often use several of them together. In this lesson, we provide a comprehensive decision framework.
| Service | Pattern | Core Purpose |
|---|---|---|
| Amazon SQS | Point-to-point queue | Decouple producer from consumer with a buffer |
| Amazon SNS | Publish-subscribe | Broadcast one message to many subscribers |
| Amazon EventBridge | Event bus with routing | Intelligent content-based routing with native AWS integration |
| AWS Step Functions | Workflow orchestration | Coordinate multi-step processes with state management |
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