Message driven bean and message style web service

Question

Hi,
I'm trying to deploy a message style web service with a message driven EJB as
the receiver and am getting the following exception:
<Jan 22, 2002 10:51:06 AM PST> <Warning> <EJB> <MessageDrivenBean threw an Exception
in onMessage(). The exception was:
java.lang.ClassCastException: weblogic.jms.common.ObjectMessageImpl
java.lang.ClassCastException: weblogic.jms.common.ObjectMessageImpl
at credit.message.PostDefaultPayment.onMessage(PostDefaultPayment.java:24)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:254)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
public void onMessage(Message message) {
System.out.println("onMessage");
TextMessage textmessage = (TextMessage)message. // It is throwing
the exception on this line --looks pretty normal
Has anyone seen this before? Am I missing something?
Thanks,
Tim

Answer 1

Hi Tim,
I think the problem is that you are assuming that the data type, of the message
argument to the onMessage(Message message) method in your MDB, is of type TextMessage.
I agree that this seems logical, especially since you passed "a string" to the
Message-style Web Service. However, this is not the case, because the WSDL uses
the "xsd:anyType" as the data type for any argument you pass to the send() method
;-) This maps to a java.lang.Object in the WebLogic Web Services implementation,
which is why you get the casting error. Try this instead:
public void onMessage(Message msg)
     try
          String msgText;
          ObjectMessage objMessage = (ObjectMessage)msg;
          msgText = (String)objMessage.getObject();
System.out.println("[PostDefaultPayment.onMessage(Message)] msgText=" + msgText);
System.out.println("[PostDefaultPayment.onMessage(Message)] msg.getJMSType()="
+ msg.getJMSType());
System.out.println("[PostDefaultPayment.onMessage(Message)] msg.getJMSCorrelationID()="
+ msg.getJMSCorrelationID());
System.out.println("[PostDefaultPayment.onMessage(Message)] msg.getJMSMessageID()="
+ msg.getJMSMessageID());
     catch(Exception e)
e.printStackTrace();
Regards,
Mike Wooten
"Tim Uy" <[email protected]> wrote:
>
Hi,
I'm trying to deploy a message style web service with a message driven
EJB as
the receiver and am getting the following exception:
<Jan 22, 2002 10:51:06 AM PST> <Warning> <EJB> <MessageDrivenBean threw
an Exception
in onMessage(). The exception was:
java.lang.ClassCastException: weblogic.jms.common.ObjectMessageImpl
java.lang.ClassCastException: weblogic.jms.common.ObjectMessageImpl
at credit.message.PostDefaultPayment.onMessage(PostDefaultPayment.java:24)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:254)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
public void onMessage(Message message) {
System.out.println("onMessage");
TextMessage textmessage = (TextMessage)message. // It
is throwing
the exception on this line --looks pretty normal
Has anyone seen this before? Am I missing something?
Thanks,
Tim