GraphQL and CQRS, a Perfect Fit
summary
A demo gift‑card system implements create, redeem and cancel using event‑sourced CQRS and shows practical GraphQL mutation patterns: commands go through Axon Server and Axon Framework, projections live in MongoDB, the GraphQL layer runs on Deno with Yoga and uses server-sent events for subscriptions and webhooks. Mutations return a union of success, command error, or fetch/timeout; timeouts are configurable. The pipeline reliably rebuilds projections and serves fast eventual consistency in practice.
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chapters (7)
- 0:00Introduction and context
- 2:15Understanding CQRS basics
- 5:08Gift card application demo
- 6:57Architecture and data flow
- 8:37Mutations and handling errors
- 12:33Querying and subscriptions
- 13:58Demo and Q&A
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