我有一个消息驱动的bean(MDB),它实现了MessageListener,并有几个EJB属性,但没有注入它们,所以我必须手动注入它们。MDB还有一个资源和一个CDIBean,它们被很好地注入。
为什么EJB不是自动注入的?我在应用程序的其他部分使用NotificationServiceEJB,它们被注入。有关于如何解决这个问题的线索吗?
我没有从Weblogic 12.1.3中得到任何错误,所以我不知道这里发生了什么。我的代码是(出于调试目的,充满了跟踪)。我已经删除了与问题无关的javadocs和方法实现:
@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
}
}
使用@Inject
而不是@EJB
注释来注入EJB效果良好。因此,一些Weblogic的补丁程序应该有问题,因为在另一个Weblogic(相同版本,不同的补丁程序)中测试它也能很好地进行