Accumulating SOAP responses together with SOAP requests through wso2esb mediation - soap

Question

I have a SOAP web service which can be accessed like:
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
xmlns:sys="system">
<soap:Body>
<sys:getAccountInfo>
<account id="132456"/>
</sys:getAccountInfo>
</soap:Body>
</soap:Envelope>
This web service would provide the following response:
<S:Envelope xmlns:S="http://www.w3.org/2003/05/soap-envelope">
<S:Body>
<ns1:getAccountInfoResponse xmlns:ns1="system">
<balance value="555">
</ns1:getAccountInfoResponse>
</S:Body>
</S:Envelope>
My challenge is to provide a proxyfying service which can accept multiple accounts as an input and respond with balance for each one like the following:
Request into proxy:
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
xmlns:sys="systemProxy" xmlns:inner="innerProxyNamespace">
<soap:Body>
<sys:getAccountInfo>
<inner:account id="123456"/>
<inner:account id="123457"/>
<inner:account id="123458"/>
</sys:getAccountInfo>
</soap:Body>
</soap:Envelope>
Proxy response:
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
xmlns:sys="systemProxy" xmlns:inner="innerProxyNamespace">
<soap:Body>
<sys:getAccountInfoResponse>
<inner:account id="123456">
<inner:balance value="555"/>
</inner:account>
<inner:account id="123457">
<inner:balance value="666"/>
</inner:account>
<inner:account id="123458">
<inner:balance value="777"/>
</inner:account>
</sys:getAccountInfoResponse>
</soap:Body>
<soap:Envelope>
I am using Iterate and Aggregate mediator for splitting incoming request into multiple requests to backend and accumulating responses from backend into single message. The problem is I can not find the right way to include account id into proxy response even with Enrich mediator.
I do iteration sequence like this:
<!-- it is correct proxy incoming message format -->
<iterate attachPath="soap:Body/sys:getAccountInfo"
expression="$body/sys:getAccountInfo/account"
preservePayload="true"
xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:sys="systemProxy">
<target>
<sequence>
<payloadFactory>
<!-- payloadFactory configuration skipped -->
</payloadFactory>
<enrich>
<source clone="true" type="body"/>
<target property="originalRequest" type="property"/>
</enrich>
<send>
<endpoint key="BackendEndpoint"/>
</send>
</sequence>
</target>
</iterate>
So the question is - what is the right way to aggregate all response messages from backend into one preserving data from the original request?

Answer 1

I used Propetry and PayloadFactory mediators before the Aggregate mediator. It let me include request into response before aggregation. Then I aggregated them all together.