Agent skill

backend-javaee

(ePost) Use when working with Jakarta EE — JAX-RS endpoints, CDI/EJB services, JPA/Hibernate, WildFly deployment

View SKILL.md on GitHub Repository
Stars 163
Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/backend-javaee

Metadata

Additional technical details for this skill

keywords
javaee jakarta jax-rs hibernate ejb cdi wildfly jpa
platforms 
[
    "backend"
]
agent affinity 
[
    "epost-fullstack-developer",
    "epost-tester",
    "epost-debugger",
    "epost-code-reviewer"
]

SKILL.md

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

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

Sub-Skill Routing

When this skill is active and user intent matches a sub-skill, delegate:

Intent Sub-Skill When
Database work backend-databases PostgreSQL, MongoDB, persistence

Aspects

Aspect File Purpose
REST references/rest-patterns.md JAX-RS endpoint patterns
Services references/service-patterns.md CDI/EJB service layer
Persistence references/persistence-patterns.md JPA/Hibernate + MongoDB
Testing references/testing-patterns.md JUnit 4, Mockito, Arquillian

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