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1. Download and install the ESB profile of WSO2 Enterprise Integrator (EI). For a list of prerequisites and step-by-step installation instructions, go to Installing the Product in WSO2 EI Documentation.
2. Start an instance of Sample Axis2 server. For instructions, go to Starting the Axis2 server in WSO2 EI Documentation.
3. Deploy the back-end service SimpleStockQuoteService. For instructions on deploying sample back-end services, go to Deploying sample back-end services in WSO2 EI Documentation.
4. Download the Request-Reply.zip file.

ESB configuration

Start the ESB profile and log into its Management Console. For instructions, see Starting the ESB profile in WSO2 EI Documentation.

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<?xml version="1.0" encoding="UTF-8"?> 
 <definitions xmlns="http://ws.apache.org/ns/synapse">
  <proxy name="ProxyServiceRequestReplyProxy" transports="http https" startOnLoad="true">
        <target>
           <inSequence>
              <send>
                 <endpoint>
                    <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
                 </endpoint>
              </send>
           </inSequence>
           <outSequence>
              <send/>
           </outSequence>
        </target>
     </proxy>
 </definitions>

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Use a SOAP client like SoapUI to invoke the above proxy service. The following image illustrates how a response is generated to a request made by the client.Image Removed

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://services.samples"
xmlns:xsd="http://services.samples/xsd">
   <soapenv:Header>
   </soapenv:Header> 
   <soapenv:Body>
      <ser:getQuote>
         <ser:request>
            <xsd:symbol>IBM</xsd:symbol>
         </ser:request>
      </ser:getQuote>
   </soapenv:Body>
</soapenv:Envelope>

Image Added

How the implementation works

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