Bootiful Spring Boot 3.x
summary
Spring Boot 3.x targets a Java 21 baseline and adds Spring AOT, observability, declarative HTTP/RSocket clients, and built-in support for GraalVM native images; a demo-native image starts in ~0.1s and runs at about 117 MB RSS in production. Developer workflow uses Docker Compose, DevTools and Testcontainers for fast reloads, and spring.threads.virtual.enabled=true flips on Java 21 virtual threads for nonblocking IO. The stack integrates Spring AI for RAG (vector stores + LLM clients) and the native build works but requires longer compile time.
AI-written summary · about
chapters (6)
- 0:00Introduction
- 3:36Building Spring Boot app
- 18:37AI with Spring AI
- 27:16Java 21 virtual threads
- 38:27GraalVM for production
- 49:38Summary








