Features

This section documents cross-cutting capabilities — concepts that span multiple modules and that you typically encounter as features rather than as packages.

For a single-module focus, see modules/. For the architectural view of how modules connect, see overview/architecture.

Pages in this section

• Dependency injection — How @Component, @Configuration, @Bean, and @Autowired work end-to-end.
• AOP (Aspect-Oriented Programming) — Proxy-based and AspectJ-woven advice; how @Transactional, @Async, and @Cacheable are implemented.
• Data access — JDBC, JPA, R2DBC, transactions, and exception translation.
• Web MVC — The Servlet-stack request lifecycle.
• Reactive stack — End-to-end reactive: WebFlux + R2DBC + reactive messaging.
• Testing support — TestContext framework, MockMvc, WebTestClient, mocks.