Spring Boot 2.2.0 Released with Performance Boosts, Lazy Initialization, Java 13 Support, Immutable @ConfigurationProperties, and RSocket Integration

Spring Boot 2.2.0 is now officially available and can be downloaded from the Spring release repository or Maven Central.

Performance improvements : The new version starts up noticeably faster and consumes less memory, which is especially beneficial in environments with strict memory constraints.

Lazy initialization : Global lazy initialization can be enabled by setting the spring.main.lazy-initialization property, reducing startup time. However, this may increase request latency for lazily initialized beans and defer some startup‑time failures to runtime.

Java 13 support : Spring Boot 2.2 adds official support for Java 13 while maintaining compatibility with Java 11 and Java 8.

Immutable @ConfigurationProperties binding : Configuration properties now support constructor‑based binding, making @ConfigurationProperties classes immutable. Developers can annotate the class or a constructor with @ConstructorBinding and use annotations such as @DefaultValue and @DateTimeFormat on constructor parameters.

RSocket support : Comprehensive auto‑configuration for RSocket has been added, along with a new starter spring-boot-starter-rsocket. When spring-security-rsocket is on the classpath, Spring Security’s RSocket integration is also auto‑configured.

For the full list of changes, see the official release announcement: https://spring.io/blog/2019/10/16/spring-boot-2-2-0

Author: xplanet Source: oschina.net/news/110615/spring-boot-2-2-0-released