public void onMessage(javax.jms.Message msg) {
  try {
    if (msg instanceof javax.jms.TextMessage) {
            System.out.println("+++ SAMPLE MDB: Text Message => " + ((javax.jms.TextMessage)msg).getText());
    }
    else if (msg instanceof javax.jms.BytesMessage) {
            System.out.println("+++ SAMPLE MDB: Bytes Message ");
    }
    else if (msg instanceof javax.jms.StreamMessage) {
            System.out.println("+++ SAMPLE MDB: Stream Message ");
    }
    else if (msg instanceof javax.jms.ObjectMessage) {
            System.out.println("+++ SAMPLE MDB: Object Message ");
    }
    else if (msg instanceof javax.jms.MapMessage) {
            System.out.println("+++ SAMPLE MDB: Map Message ");
    }
    else {
            System.out.println("+++ SAMPLE MDB: Unknown Message Type ");
    }
  }
  catch(javax.jms.JMSException e) {
    System.out.println("+++ SAMPLE MDB: Error occurred ");
    e.printStackTrace();
  }
}