Sending a JMS message inside a PostPersist entity listener method

Question

Hi to all,
I have an entity called "Batch" that I want to persist. After the persist, I want to send a JMS message to notify batch insertion to the other clients.
So I created the "Batch" entity as following :
@Entity
@EntityListeners({BatchServiceBean.class})
@Table(name = "batch")The "BatchServiceBean" is a session bean which persists the batch and sends the JMS notification message.
Inside this class we have the following method :
@PostPersist
    private void sendInsertMessage(Batch insertedBatch) throws JMSException {
        AddBatchMessage message = new AddBatchMessage();
        message.setBatch(insertedBatch);
        try {
            messageSenderServiceBean.sendRefreshMessage(message);
        } catch (Exception oups) {
            oups.printStackTrace();
    }In the previous code, I recuperate the inserted batch and the "messageSenderServiceBean" facade to send a refresh message.
My problem is that I can get the inserted batch, but the object "messageSenderServiceBean" is null knowing that I have the following annotation to get the "messageSenderServiceBean" facade.
@EJB
    private MessageSenderServiceLocal                   messageSenderServiceBean;Whyhe object "messageSenderServiceBean" is null ??
Can any one help me ??
Thanks in advance.

Answer 1

Hello,
Injection only occurs on server managed objects, not JPA managed entities or other java objects such as the listeners registered with JPA. So your Listener class will need to look up the server objects or other resources directly from the context rather than rely on them being injected. I don't have any good examples handy, but similar to how you would look up an ejb/datasource etc before injection.
Best Regards,
Chris