Hexagonal Architecture in Practice That Will Make Your Applications More Sustainable
summary
Live coding builds a hexagonal Java app (Maven, JUnit) with a pure domain module and a Spring Boot infrastructure module that adapts a public Swappy REST API via a Swappy client and mock server. Features: API/SPI interfaces, a fleet assembler that passes an acceptance test for 150 passengers and a demo case of five survivors (Millennium Falcon capacity 6), stubs-in-production for early client feedback, conversion/anti-corruption logic to turn Swappy strings into ints, and controller resources to avoid breaking consumers — tests pass, Swappy certs fail.
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chapters (8)
- 0:00Introduction and rescue mission
- 7:28Problems with layered architecture
- 10:16Hexagonal architecture explained
- 13:03Live coding domain layer
- 22:39Adding controller and integration
- 33:07Integrating external service
- 42:27Refactoring and API versioning
- 45:41Q&A and conclusion
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