EntityManagerProducer.java

@ApplicationScoped
public class EntityManagerProducer {
	
	private static EntityManagerFactory factory;
	private static final String namePu = "Persistence-Unit";
	
	public EntityManagerProducer() {
		EntityManagerProducer.factory = Persistence.createEntityManagerFactory(namePu);  
	}
	
	public static EntityManagerFactory getFactory() {
		return factory;
	}

	public static void setFactory(EntityManagerFactory factory) {
		EntityManagerProducer.factory = factory;
	}
	
	@Produces 
	@RequestScoped
	public EntityManager createEntityManager(){
		return EntityManagerProducer.getFactory().createEntityManager();
	}
	
	public void closeEntityManager(@Disposes  EntityManager emf){
		emf.close();
	}
}