Async Web service with two port types

[Håkon Sagehaug]

Hi all,

I'm explaoring the async field of web services and have developed one using
ws-addressing, and have my service when a request comes in, reply with HTTP
202 message, and the sending the actual result to a new endpoint, this works
fine.

In the end I maybe want to compose a BPEL process with these services and in
BPEL examples and sites I looked at all talk about a service with two port
types, on for kicking of the service and the other one for a call back, I've
not grasped this fully so was wondering if anyone have done something
similar before and/or can provide an example. In the BPEL world I typically
see something like this

<portType name="LoanService">
        <operation name="initiate">
            <input message="tns:LoanServiceRequestMessage"/>
        </operation>
    </portType>

    <!-- portType implemented by the requester of LoanService BPEL process
         for asynchronous callback purposes
         -->
    <portType name="LoanServiceCallback">
        <operation name="onResult">
            <input message="tns:LoanServiceResultMessage"/>
        </operation>
    </portType>

Also not entierly sure how the service then should be implemented. Any
tips or hint on this matter??

cheers, Håkon



-- 
Håkon Sagehaug, Scientific Programmer
Parallab, Bergen Center for Computational Science (BCCS)
UNIFOB AS (University of Bergen Research Company)