How can I get all messages from a ActiveMQ broker?

So I have an ActiveMQ broker and some producers that puts some self made objects in the broker. I also have some consumers that receive those messages(serialized objects) without problem. But I want to create a tool that connects to the broker and displays all messages (serialized objects).

I tried to do that using and ActiveMQConnection :

Set<ActiveMQQueue> currentMessageQueues = activeMQConnection.getDestinationSource().getQueues();
Iterator<ActiveMQQueue> messageQueueIterator = currentMessageQueues.iterator();

while (messageQueueIterator.hasNext()) {
    ActiveMQQueue currentQueue = messageQueueIterator.next();
    QueueSession queueSession = activeMQConnection.createQueueSession(true, Session.AUTO_ACKNOWLEDGE);
    QueueBrowser browser = queueSession.createBrowser(currentQueue);
    Enumeration<?> messagesInQueue = browser.getEnumeration();

    while (messagesInQueue.hasMoreElements()) {
       Message queueMessage = (Message) messagesInQueue.nextElement();

       if (queueMessage instanceof ActiveMQObjectMessage) {
          ActiveMQObjectMessage objectMessage = (ActiveMQObjectMessage) queueMessage;
          objectMessage.getObject();
       }
    }
 }

With this code I get an exception on objectMessage.getObject():

javax.jms.JMSException: Failed to build body from content. Serializable class not available to broker. Reason: java.lang.ClassNotFoundException: MyMessage

I used debug mode and ActiveMQObjectMessage has the object set to null.

Is this approach good and If yes what I am doing wrong? How can I also receive the object from the broker?