Functional Core for a Side-Effect-Free Application Core
summary
The talk explains how to apply the Functional Core / Imperative Shell architecture in Java to get functional-programming benefits (pure functions, immutability, easier testing) without switching to a purely functional language. It describes separating a pure, immutable application core from an imperative outer layer that handles side effects like persistence and service calls, and shares pros and cons based on experiences building and deploying ES/CQRS microservices with this approach.
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chapters (7)
- 0:00Start
- 11:31Let's get to work... Talk
- 12:39Agenda
- 18:52Usage in the Imperative Shell
- 20:31Testing the Functional Core
- 21:41Testing the Imperative Shell
- 24:03Testing Imperative Shell
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