Thread in message bean

[magicman]

Hope someone can help me with this, I have no idea what I'm doing. Anyway I'm working on jboss 2.4.3, win2k, jdk1.3.1, tomcat 4. I've created a Queue message bean and in the onMessage method I call the wait3minute() method which wait 3 minutes and then does an operation. here is the code

public void onMessage(Message message) {
  doStuff.......
  wait3min(message);
}

public static Object sync_obj;

public static void wait3min(BidAsk bidAsk) {
  sync_obj = bidAsk;
  Thread t = new Thread(new Runnable() {
   public void run() {
    System.out.println("Notifier-Thread: waiting for 4000ms");
    try {
    Thread.sleep(1000*60*4);
   } catch (InterruptedException e) {
  }
  System.out.println("Notifier-Thread: again up to work");
  synchronized (sync_obj) {
   System.out.println("Notifier-Thread: execute to notify");
   sync_obj.notifyAll();
  }
   System.out.println("Notifier-Thread: it's over now");
  }
  });
   synchronized (sync_obj) {
    System.out.println("main: start thread and wait for notify");
    t.start();
    try {
     sync_obj.wait();
    } catch (InterruptedException e) {
   }
  }
   System.out.println("main: notify received --> and bye ...");
  }

If anyone know what to do, please let me know

[parsonskerins]

The EJB specification specifically forbid the creation of threads within an EJB - thread control is the domain of the EJB container. Some application servers will allow you, perhaps, to start your own threads, but you will loose portability of the EJB.

[ahjulsta]

What will solve the problem, however, is using a Timer MBean or a Scheduler. Examples of this are can be found in the configuration files, (jboss-service.xml). It is also covered in the free doco.

[swingler]

easy! you can send an objectmessage to an MDB with an object of the type - Runnable & Serializable. MDB do the work in another thread and if you send many such message, MDB can concurrently do the job. With clustered environment, very high performance could be acheived. But I don't know how to control the thread number serving the MDB. Any solutions please let me know ([e-mail])

[joelvogt]

settings are in standardjboss.xml