301-frameworks-spring-boot-core
Spring Boot Core Guidelines
Apply Spring Boot Core guidelines for annotations, bean management, configuration, and dependency injection.
What is covered in this Skill?
- @SpringBootApplication and main application class
- Component annotations: @RestController, @Service, @Repository
- Bean definition, scoping, lifecycle
- Configuration classes and @ConfigurationProperties (with @Validated for fail-fast startup)
- Component scanning and package organization
- Conditional configuration and profiles (@Profile, @ConditionalOn*)
- Constructor dependency injection
- @Primary and @Qualifier for disambiguation when multiple beans share a type
- Bean minimization and composition
- Graceful shutdown for in-flight work
- Virtual threads on supported stacks for concurrency-bound workloads
- Jakarta EE namespace consistency (jakarta.* preferred; avoid mixing legacy javax.annotation / javax.validation)
- Scheduled tasks and background processing
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