Spring Boot Revisited with KoFu and JaFu
summary
Compares Kotlin KoFu and Java JaFu DSLs from the Spring Fu incubator and shows concrete gains: same PetClinic app built with KoFu/Jafu runs with explicit bean wiring, compiles with GraalVM native-image via the Maven plugin, and produces an 81 MB native image vs ~400 MB on the JVM; startup drops from ~2.6 s to near-instant and memory falls by 3x–5x. Demo runs end-to-end (web, JDBC, Thymeleaf), native build is slow so run in CI, and Spring Fu 0.4.x adds MVC/Flux, converters, and coroutine support.
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chapters (15)
- 0:00Introduction
- 1:58Modern JVM and Spring
- 3:14Why Kotlin for Spring
- 6:50Kotlin Support in Spring
- 9:22Java's Functional Evolution
- 11:26Introducing SpringFu
- 13:37Configuration Models
- 16:18Jafu and Kofu Examples
- 19:00SpringFu Features and Team
- 22:29Native Applications
- 25:32Native Efficiency Metrics
- 26:37Pet Clinic Demo
- 36:39Roadmap and Future
- 39:09Sustainability Strategy
- 45:23Q&A and Conclusion
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