WSDL for asynch service with error message

Question

Hi,
can anybody provide a example of a wsdl which is asynchronous and defines a fault message, if the service fails?
Thanks...

Answer 1

In principle, the way you define a SOAP Fault is by adding the faults that could be emitted for a given operation at the binding and portType level. Here is an example:
<wsdl:message name="echoFaultMessage">
     <wsdl:part name="fault" element="xsd1:EchoFault"></wsdl:part>
</wsdl:message>
<wsdl:portType name="EchoWithFault">
     <wsdl:operation name="echo">
          <wsdl:input message="tns:echoWithFault" />
                <wsdl:fault name="fault" message="tns:echoFaultMessage"></wsdl:fault>
       </wsdl:operation>
</wsdl:portType>
...That said, it may not be wise to try to convey error back to the caller using SOAP Fault for async processing, as you have no guaranty that the client calling the one-way service will process the fault, as they may be using the "fire & forget" style of invocation.
It's better to convey any processing error to the caller on the back channel.
Hope it helps,
-Eric