Jersey + HK2 + Grizzly: Proper way to inject EntityManager?

Question

I\'ve managed to set up injection (into resource classes) of my own service classes in Jersey, HK2 and a plain GrizzlyServer. (Basically followed this example.)

I\'m

Answer 1

In place of Factory<T>.dispose(T), registering with the injectable CloseableService may do most of what you want. A Closeable adapter will be required. CloseableService closes() all registered resources upon exiting the request scope.

class MyEntityManagerFactory implements Factory<EntityManager> {
    private final CloseableService closeableService;
    EntityManagerFactory emf;

    @Inject
    public MyEntityManagerFactory(CloseableService closeableService) {
        this.closeableService = checkNotNull(closeableService);
        emf = Persistence.createEntityManagerFactory("manager1");
    }

    @Override
    public void dispose(EntityManager em) {
        em.close();
    }

    @Override
    public EntityManager provide() {
        final EntityManager em = emf.createEntityManager();
        closeableService.add(new Closeable() {
            public final void close() {
                em.close();
            }
        });
        return em;
    }
}