Cross-Domain Events with AsyncAPI and AWS
summary
A cross‑domain event distribution service at The LEGO Group runs on AWS and replaces poll-based checkout checks with push events, handling massive global e‑commerce volume. It uses EventBridge with rules and Step Functions to transform EventBridge messages into CloudEvents payloads, applies enrichment via JSON Patch, signs and encrypts payloads with nested JSON Web Tokens, issues ULID event IDs, provides idempotency via an MD5 content hash, and publishes AsyncAPI specs (Modelina/Generator) into Backstage for discovery — production proven at scale.
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chapters (26)
- 0:00Introduction
- 0:22Eventdriven architectures
- 1:07Crossdomain events
- 2:15CrossDomain Domains
- 4:02Poolbased solution
- 4:49Pullbased solution
- 5:44desirable properties
- 10:15AsyncAPI
- 11:54AWS Event Bridge
- 14:54Cloud Events
- 17:31Commonality Map
- 19:24Event Flow Diagram
- 22:33Discovery
- 24:16Backstage
- 25:16Event Hierarchy
- 27:04Evolution
- 29:48Enrichment
- 33:47Event IDs
- 35:08Event potency
- 37:18Event security
- 39:57Testing
- 41:14testing integration points
- 41:43contract testing
- 42:55observability
- 43:48custom metrics
- 44:11recap
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