@Transactional
public class CustomerService {

  @Inject
  private EntityManager em;
  @Inject
  private Logger logger;

  public void createCustomer(Customer customer) {
    em.persist(customer);
  }

  public Customer findCustomerById(Long id) {
    return em.find(Customer.class, id);
  }

  @AroundInvoke
private Object logMethod( InvocationContext ic ) throws Exception {
    logger.entering( ic .getTarget().toString(), ic .getMethod().getName());
    try {
      return ic.proceed() ;
    } finally {
      logger.exiting( ic .getTarget().toString(), ic .getMethod().getName());
    }
  }
}