Stateless EJB not injected in message driven bean (MDB) - dependency-injection

Question

I have a message driven bean (MDB) that implements MessageListener and has several EJB attributes but non of them are injected so I have to inject them manually. The MDB also has a resource and a CDI bean that are injected fine.
Why the EJBs are not injected automatically? I use NotificationService EJB at other parts of the application and they are injected. Any clue about how to figure out the problem?
I don't get any error from Weblogic 12.1.3, so I can't figure out what's happening here. My code is (full of traces for debugging purposes). I've removed javadocs and method implementations that are not relevant to the problem:
#MessageDriven(name = "MailMessageConsumer", description = "JMS consumer", mappedName = MailJndiConfiguration.JNDI_QUEUE,
activationConfig = {
#ActivationConfigProperty(propertyName = "acknowledgeMode",
propertyValue = "Auto-acknowledge"),
#ActivationConfigProperty(propertyName = "destinationType",
propertyValue = "javax.jms.Queue")
})
#TransactionAttribute(TransactionAttributeType.REQUIRED)
#MessageReceiver(responsibility = "Consumes JMS messages of type MailMessage")
public class MailMessageConsumer implements MessageListener {
private static final Logger log = LoggerFactory.getLogger(MailMessageConsumer.class);
#Resource
private MessageDrivenContext messageDrivenContext;
#EJB
private NotificationService notificationService;
#EJB
private MailClient mailClient;
#Inject
private ApplicationInformation applicationInformation;
#Override
public void onMessage(Message message) {
if (mailClient == null) {
log.error("mailClient object is null");
try {
log.info("Instantiating MailClient manually...");
mailClient = BeanManagerHelper.getReference(MailClient.class);
} catch (Exception e) {
log.error("Cannot instantiate MailClient manually", e);
}
}
if (notificationService == null) {
log.error("notificationService object is null");
try {
log.info("Instantiating NotificationService manually...");
notificationService = BeanManagerHelper.getReference(NotificationService.class);
} catch (Exception e) {
log.error("Cannot instantiate NotificationService manually", e);
}
}
// This never happens
if (applicationInformation == null) {
log.error("applicationInformation object is null");
}
// This never happens
if (messageDrivenContext == null) {
log.error("messageDrivenContext object is null");
}
deliverMessage(message);
}
private void deliverMessage(Message message) {
// Not important
}
private MailMessage retrieveMessage(Message message) {
// Not important
}
private void sendEmail(MailMessage mailMessage) {
// Not important
}
}
MailClient EJB:
#Stateless
#LocalBean
#TransactionAttribute(TransactionAttributeType.MANDATORY)
#Service
public class MailClient {
private static final Logger logger = LoggerFactory.getLogger(MailClient.class);
#Resource(mappedName = MailJndiConfiguration.JNDI_MAIL_SESSION)
private Session mailSession;
#EJB
private NotificationService notificationService;
#Inject
private ApplicationInformation applicationInformation;
enum ValidationError {
NULL_OBJECT("Mail message is null"),
CONTENT_TYPE_EMPTY("Content type not initialized"),
BODY_EMPTY("Message body content is empty");
private static final String ERROR_MESSAGE_PREFIX = "Invalid mail message: ";
private String message = ERROR_MESSAGE_PREFIX;
ValidationError(String message) {
this.message += message;
}
public String getMessage() {
return message;
}
}
public void sendMail(MailMessage mailMessage) throws MailMessageSendingException {
// Not important
}
}
NotificationService EJB:
#Stateless
#LocalBean
#TransactionAttribute(TransactionAttributeType.MANDATORY)
#Service
public class NotificationService {
private static final Logger logger = LoggerFactory.getLogger(NotificationService.class);
#PersistenceContext(unitName = "myEntityManager")
private EntityManager entityManager;
#EJB
private NotificationPendingMessageValidator notificationPendingMessageValidator;
#EJB
private NotificationFinder notificationFinder;
#Inject
private ApplicationInformation applicationInformation;
public NotificationPendingMessageEntity saveNotificationMessageForDeferredMail(NotificationPendingMessageEntity notificationPendingMessageEntity) throws ValidationException {
// Not important
}
public List<NotificationPendingMessageEntity> findNotificationPendingMessageEntities(TimeSlot timeSlot) {
// Not important
}
#TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
public NotificationMailEntity createNewMailEntity() {
// Not important
}
#TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
public void updateMailEntity(NotificationMailEntity mailEntity) {
// Not important
}
public void createNotificationMessageProcessedEntity(NotificationProcessedMessageEntity notificationProcessedMessageEntity) {
// Not important
}
public void removeNotificationMessagePendingEntity(NotificationPendingMessageEntity notificationPendingMessageEntity) {
// Not important
}
public void reportMailFailure(NotificationMailEntity mailEntity, String failureNotice) {
// Not important
}
}

Answer 1

Using #Inject for injecting the EJBs instead of #EJB annotation works fine. So there should be a problem with some Weblogic's patches, because testing it in another Weblogic (same version, different patches) it worked as well