Domain 3 of 4 · Chapter 8 of 8

Other In-Scope Services

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Included in this chapter:

  • Application integration: SNS, SQS, EventBridge, Step Functions
  • Business apps, developer tools, and X-Ray
  • End-user computing, frontend/mobile, and IoT
  • Exam-pattern recognition: pick the service by the keyword

Which application-integration service: SNS vs SQS vs EventBridge

Decision axisAmazon SNSAmazon SQSAmazon EventBridge
PatternPub/sub fan-out (push)Message queue (pull/poll)Event bus with routing rules
Delivery directionPushed to subscribersConsumer polls and deletesPushed to matched targets
Typical signal in a stemNotify many subscribers at onceBuffer / decouple work for laterRoute by event content or schedule
SourcesYour app / services publishYour app / services sendAWS services, custom apps, SaaS partners
Content filteringSubscription message filteringNone (consumer reads all)Rules match the event body
Built-in schedulingNoNoYes (EventBridge Scheduler / cron)

Decision tree

noyesnoyesnoyesCoordinate a multi-stepworkflow with branching?One message pushed tomany subscribers at once?Route by event content,SaaS source, or schedule?AWS Step FunctionsAmazon SNSAmazon EventBridgeAmazon SQS(buffer / decouple work)
Cheat sheet

Cheat sheet

  • SNS is push-based pub/sub fan-out
  • SNS delivers to many endpoint types
  • SQS is a pull-based queue that decouples components
  • SQS Standard vs FIFO queues
  • Fan-out pattern combines SNS and SQS
  • EventBridge routes events with rules
  • EventBridge can trigger tasks on a schedule
  • Step Functions orchestrates multi-step workflows
  • Step Functions Standard vs Express
  • Amazon Connect is a cloud contact center
  • Amazon SES sends bulk and transactional email
  • CodeBuild builds; CodePipeline automates the release
  • X-Ray traces distributed applications
  • WorkSpaces vs AppStream 2.0 vs Secure Browser
  • Amplify hosts full-stack web and mobile apps
  • AppSync is a managed GraphQL API
  • IoT Core connects devices over MQTT
  • AWS Organizations centralizes accounts and billing
  • Service control policies set the permission ceiling
  • Control Tower sets up a governed landing zone

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Also tested in

References

  1. https://aws.amazon.com/sns/faqs/
  2. https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-quotas.html
  3. https://aws.amazon.com/eventbridge/faqs/
  4. https://docs.aws.amazon.com/step-functions/latest/dg/concepts-standard-vs-express.html
  5. https://aws.amazon.com/ses/faqs/
  6. https://docs.aws.amazon.com/codebuild/latest/userguide/welcome.html
  7. https://docs.aws.amazon.com/codepipeline/latest/userguide/welcome.html
  8. https://docs.aws.amazon.com/xray/latest/devguide/aws-xray.html
  9. https://docs.aws.amazon.com/amplify/latest/userguide/welcome.html
  10. https://aws.amazon.com/appsync/
  11. https://aws.amazon.com/iot-core/faqs/