framework-microprofile-jakarta

# MicroProfile & Jakarta EE Server Engineering This skill guides the construction of microservices and enterprise applications in compliance with the open **Eclipse MicroProfile 6.x+** and **Jakarta EE 10/11+** specifications (Payara, Open Liberty, WildFly, Helidon). --- ## 🧭 1. Pillars of the MicroProfile Specification 1. **JAX-RS (Jakarta RESTful Web Services)**: Definition of HTTP endpoints with `@Path`, `@GET`, `@POST`, `@Produces(MediaType.APPLICATION_JSON)` annotations. 2. **CDI (Contexts and Dependency Injection)**: Life-cycle management with strict scopes (`@ApplicationScoped`, `@RequestScoped`). 3. **MicroProfile Config**: Decoupled parameterization via `microprofile-config.properties` and environment variables with `@ConfigProperty`. 4. **MicroProfile Fault Tolerance**: Native resilience with `@Timeout`, `@Retry`, `@CircuitBreaker`, `@Bulkhead`, and `@Fallback`. 5. **Health & Metrics**: Standardized liveness/readiness endpoints (`/health/live`, `/health/ready`) and open telemetry with MicroProfile Telemetry / Metrics. --- ## 🏢 2. Architectural Isolation Rules - Keep domain rules pure and decoupled from JAX-RS transport annotations. - Use Bean Validation (`@Valid`) at the application boundary for early rejection of invalid payloads. - In projects that use the Boundary-Control-Entity (BCE) architecture, the boundary implements the JAX-RS resources and injects them into the business controls.