Best way to call web service from Message Driven Bean

Question

I'm q'ing msgs up and would like to use a message driven bean to forward them to
an external web service. Weblogic workshop does not seem to support web service
controls in an EJB project. Any suggestions?
Thanks,
Paul

Answer 1

Paul,
A non-trivial alternative, since you have the WSDL, would be to forget about trying
to use generated client code and just use JAX-RPC dynamic invocation instead.
That's how I call external web services from within an EJB in situations in which
generated client code cannot be incorporated prior to deployment. Minimally all
that is required is the WSDL and the service name, port name, and operation name,
although if non-builtin parameter types are used then you will have to manipulate
the service's type mapping registry.
Mark
"Paul" <[email protected]> wrote:
>
I've taken our wsdl and generated a web service in Workshop 8.1 using
XMLBeans.
This produces a web page that contains a link"Java Proxy" for downloading
generated
client code. I assume this is the same as clientgen. It's interesting
that
it does not
use XMLBeans like the web service that generated it. It uses a different
serialization
method.
I've used this generated code to call the web service. Although the
client seems
to run
successfully to completion, I get the following error in the weblogic
server console:
<Sep 29, 2003 7:46:24 AM EDT> <Error> <WLW> <000000> <Failure=com.bea.wlw.runtim
e.core.request.ResponseValidationException: java.lang.RuntimeException:
Protocol
'http-soap' not available on this operation. [ServiceException]>
<Sep 29, 2003 7:46:24 AM EDT> <Warning> <WLW> <000000> <Returning HTTP
500 due
t
o SOAP fault occurring on DispFile=pjm.srcm.webservices.face.Receptor>
Frustrating...
Bruce Stephens <[email protected]> wrote:
Hi Paul,
Could you not first use clientgen on the external webservice, then take
the stubs it created, then add these to your code along with the
onMessage(Message msg) and roll it into the MBean?
We don't have exactly that example, but you might take a look at this
one to get some ideas:
http://webservice.bea.com/message.zip
Hope this helps,
Bruce
Paul wrote:
Bruce,
Don't think this will work for us. We are receiving data internallythrough
a JMS queue. We need to pull it off the queue (MDB), massage it alittle and
send it to an external web service. The link you sent me was howto implement
a web service with JMS.
I started out by trying to use the Web Service and JMS controls butit doesn't
seem like I can use a JMS control because that requires a conversationID,
which we don't have because nothing is comming in through a web services.
Paul
Bruce Stephens <[email protected]> wrote:
Hi Paul,
There is a chapter in the docs on this. See if this helps,
http://edocs.bea.com/wls/docs81/webserv/jms.html#1067060
Thanks,
Bruce
Paul wrote:
I'm q'ing msgs up and would like to use a message driven bean to
forward
them to
an external web service. Weblogic workshop does not seem to supportweb service
controls in an EJB project. Any suggestions?
Thanks,
Paul