Question

Right now, I have a service called ProcessPayment that calls a billing system. As we can see here, I want to make a call to another billing service from my payment service. The response from PaymentService has 3 data elements. One of them is required in BillingService.

How do I configure the flow for two or more services in Mule? I have tried various permutations but it just does not work!

Mule-config.xml

 <?xml version="1.0" encoding="UTF-8"?>
<mule xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:cxf="http://www.mulesoft.org/schema/mule/cxf"
    xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
    xmlns:spring="http://www.springframework.org/schema/beans" xmlns:core="http://www.mulesoft.org/schema/mule/core"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:http="http://www.mulesoft.org/schema/mule/http"
    xmlns:ognl="http://www.mulesoft.org/schema/mule/ognl" xmlns:servlet="http://www.mulesoft.org/schema/mule/servlet"
    xmlns:vm="http://www.mulesoft.org/schema/mule/vm" xmlns:pattern="http://www.mulesoft.org/schema/mule/pattern"
    xsi:schemaLocation="
        http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/3.1/mule.xsd
        http://www.mulesoft.org/schema/mule/pattern http://www.mulesoft.org/schema/mule/pattern/3.1/mule-pattern.xsd
        http://www.mulesoft.org/schema/mule/cxf http://www.mulesoft.org/schema/mule/cxf/current/mule-cxf.xsd 
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
        http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd 
        http://www.mulesoft.org/schema/mule/ognl http://www.mulesoft.org/schema/mule/ognl/current/mule-ognl.xsd 
        http://www.mulesoft.org/schema/mule/vm http://www.mulesoft.org/schema/mule/vm/current/mule-vm.xsd">

    <!-- <flow name="parallelservices"> <all enableCorrelation="ALWAYS"> <cxf:proxy-service 
        wsdlLocation="classpath:billingservice.wsdl" bindingId="BillingServiceServiceSoapBinding" 
        port="BillingServicePort" service="BillingServiceService" payload="body" 
        namespace="http://com.myapp.demo/" /> </all> </flow> -->

    <flow name="initpayment">
        <inbound-endpoint address="http://localhost:8585/services/processpayment">
            <cxf:proxy-service wsdlLocation="classpath:processpaymentservice.wsdl"
                bindingId="ProcessPaymentServiceServiceSoapBinding" service="ProcessPaymentServiceService"
                payload="body" namespace="http://com.myapp.demo/" />
        </inbound-endpoint>
        <outbound-endpoint address="http://localhost:8081/BillingEntry/services/BillingServicePort">
            <!-- <flow-ref name="parallelservices" /> -->
            <cxf:proxy-client/>
        </outbound-endpoint>
    </flow>

</mule>

Process Payment wsdl

<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions name="ProcessPaymentServiceService" targetNamespace="http://processpayment.icp.sf/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:tns="http://com.myapp.demo/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/">
  <wsdl:types>
    <schema xmlns="http://www.w3.org/2001/XMLSchema">
<import namespace="http://processpayment.icp.sf/" schemaLocation="processpaymentservice_schema1.xsd"/>
</schema>
  </wsdl:types>
  <wsdl:message name="processPayment">
    <wsdl:part name="parameters" element="tns:processPayment">
    </wsdl:part>
  </wsdl:message>
  <wsdl:message name="processPaymentResponse">
    <wsdl:part name="parameters" element="tns:processPaymentResponse">
    </wsdl:part>
  </wsdl:message>
  <wsdl:portType name="IProcessPayment">
    <wsdl:operation name="processPayment">
      <wsdl:input name="processPayment" message="tns:processPayment">
    </wsdl:input>
      <wsdl:output name="processPaymentResponse" message="tns:processPaymentResponse">
    </wsdl:output>
    </wsdl:operation>
  </wsdl:portType>
  <wsdl:binding name="ProcessPaymentServiceServiceSoapBinding" type="tns:IProcessPayment">
    <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
    <wsdl:operation name="processPayment">
      <soap:operation soapAction="" style="document"/>
      <wsdl:input name="processPayment">
        <soap:body use="literal"/>
      </wsdl:input>
      <wsdl:output name="processPaymentResponse">
        <soap:body use="literal"/>
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>
  <wsdl:service name="ProcessPaymentServiceService">
    <wsdl:port name="ProcessPaymentServicePort" binding="tns:ProcessPaymentServiceServiceSoapBinding">
      <soap:address location="http://localhost:8081/ProcessPayment/services/ProcessPaymentServicePort"/>
    </wsdl:port>
  </wsdl:service>
</wsdl:definitions>

Billing Service wsdl

<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions name="BillingServiceService" targetNamespace="http://com.myapp.demo2/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:tns="http://billing.icp.sf/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/">
  <wsdl:types>
    <schema xmlns="http://www.w3.org/2001/XMLSchema">
<import namespace="http://billing.icp.sf/" schemaLocation="billingservice_schema1.xsd"/>
</schema>
  </wsdl:types>
  <wsdl:message name="billingEntryResponse">
    <wsdl:part name="parameters" element="tns:billingEntryResponse">
    </wsdl:part>
  </wsdl:message>
  <wsdl:message name="billingEntry">
    <wsdl:part name="parameters" element="tns:billingEntry">
    </wsdl:part>
  </wsdl:message>
  <wsdl:portType name="IBillingService">
    <wsdl:operation name="billingEntry">
      <wsdl:input name="billingEntry" message="tns:billingEntry">
    </wsdl:input>
      <wsdl:output name="billingEntryResponse" message="tns:billingEntryResponse">
    </wsdl:output>
    </wsdl:operation>
  </wsdl:portType>
  <wsdl:binding name="BillingServiceServiceSoapBinding" type="tns:IBillingService">
    <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
    <wsdl:operation name="billingEntry">
      <soap:operation soapAction="" style="document"/>
      <wsdl:input name="billingEntry">
        <soap:body use="literal"/>
      </wsdl:input>
      <wsdl:output name="billingEntryResponse">
        <soap:body use="literal"/>
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>
  <wsdl:service name="BillingServiceService">
    <wsdl:port name="BillingServicePort" binding="tns:BillingServiceServiceSoapBinding">
      <soap:address location="http://localhost:8081/BillingEntry/services/BillingServicePort"/>
    </wsdl:port>
  </wsdl:service>
</wsdl:definitions>

Immediate Problems

I am able to generate the wsdl for ProcessPayment service when I hit the Mule config inbound URL. But it is showing modified values for

   <import schemaLocation="".../>

and

   <wsdl:port><soap:address>*****</soap:address></wsdl:port>

Using this URL, I am not able to test the service on SOAPui. But when I hit the service original address, and not the Mule inbound address, I get my actual service. It s running in SOAP UI too.

Quick question:

How do I execute a flow? Simply invoking the inbound URL from the browser or SOAPui won’t work right?

Answer 1

Here we go, I have created an example that demonstrates how to perform SOAP envelope level manipulations with CXF proxies. From there I’m sure you can expand and build whatever you need.

Please note that:

• No code generation is needed, I actually had to remove the classes you’ve generated otherwise it is not working. This single XML configuration with the WSDLs+XSDs is enough.
• I’ve qualified Mule core elements in order to avoid elements XSL-T generated in the default namespace to end up in Mule core namespace. This is not required if you externalize the XSL fragments.
• The (contrived) example exposes processpaymentservice.wsdl. It takes the value of paymentType_req, pretends it’s an IP address and uses it to call http://www.webservicex.net/geoipservice.asmx. The geolocated coutry name is then used as the value for the paymentType_res element of the process payment response (the other 2 values are faked).
• Tested with soapUI 4.5 and Mule 3.2.1.

Enjoy!

<mule:flow name="processPaymentServiceOrchestration">
    <http:inbound-endpoint address="http://localhost:8080/ppso"
        exchange-pattern="request-response">
        <cxf:proxy-service wsdlLocation="classpath:processpaymentservice.wsdl"
            service="ProcessPaymentServiceService" namespace="http://processpayment.icp.sf/" />
    </http:inbound-endpoint>

    <!-- Transform input of ProcessPayment to input of GetGeoIP -->
    <mulexml:xslt-transformer>
        <mulexml:xslt-text>
            <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
              xmlns:web="http://www.webservicex.net/">
              <xsl:template match="/">
                <web:GetGeoIP>
                   <web:IPAddress><xsl:value-of select="//paymentType_req" /></web:IPAddress>
                </web:GetGeoIP>
              </xsl:template>
            </xsl:stylesheet>
        </mulexml:xslt-text>
    </mulexml:xslt-transformer>

    <mule:message-properties-transformer>
        <mule:add-message-property key="SOAPAction" value="http://www.webservicex.net/GetGeoIP" />
    </mule:message-properties-transformer>

    <http:outbound-endpoint address="http://www.webservicex.net/geoipservice.asmx"
        exchange-pattern="request-response">
        <cxf:proxy-client soapVersion="1.2" />
    </http:outbound-endpoint>

    <!-- Transform response of GetGeoIP in response of ProcessPayment -->
    <mulexml:xslt-transformer>
        <mulexml:xslt-text>
            <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
              xmlns:pp="http://processpayment.icp.sf/" xmlns:web="http://www.webservicex.net/">
              <xsl:template match="/">
                <pp:return>
                   <billingID_res>fake billingID_res</billingID_res>
                   <paymentID_res>fake paymentID_res</paymentID_res>
                   <paymentType_res><xsl:value-of select="//web:CountryName"/></paymentType_res>
                </pp:return>
              </xsl:template>
            </xsl:stylesheet>
        </mulexml:xslt-text>
    </mulexml:xslt-transformer>
</mule:flow>