Backend Javaee

Jakarta EE Backend Patterns

Critical: This is NOT Spring Boot

This backend uses Jakarta EE conventions:

• WAR packaging deployed to WildFly 26.1 application server
• Dependency injection via @Inject (CDI) and @EJB
• REST endpoints via @Path, @GET, @POST (JAX-RS / RESTEasy)
• Persistence via persistence.xml + @Entity (JPA/Hibernate 5.6)
• Transaction management via @Transactional (CDI) or container-managed (EJB)

Do NOT suggest Spring Boot patterns (no @Autowired, no @SpringBootApplication, no application.properties).

Tech Stack

• Language: Java 8 | Platform: Jakarta EE 8 / WildFly 26.1
• REST: JAX-RS via RESTEasy | ORM: Hibernate 5.6
• Databases: PostgreSQL + MongoDB | Build: Maven
• Microprofile: Eclipse MicroProfile 4.1

Conventions

• Package structure: no.epost.<module>.<layer> (rest, service, dao, model, dto)
• REST: JAX-RS @Path classes, return Response objects
• Services: CDI @ApplicationScoped beans or @Stateless EJBs
• DAOs: JPA EntityManager via @PersistenceContext
• DTOs: Separate from entities, manual mapping or MapStruct
• Validation: Bean Validation (@NotNull, @Size, etc.)
• Error handling: Exception mappers (@Provider + ExceptionMapper<T>)

Build Commands

mvn clean package            # Build WAR
mvn test                     # Unit tests
mvn verify -Parquillian      # Integration tests

Sub-Skill Routing

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Aspects