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languagehtml/xml
<?xml version="1.0" encoding="UTF-8"?>

<!-- Service Integration with specifying the receiving sequence -->
<definitions xmlns="http://ws.apache.org/ns/synapse">
     <localEntry key="sec_policy" src="file:repository/conf/sample/resources/policy/policy_3.xml"/>
     <proxy name="StockQuoteProxy">
        <target>
            <inSequence>
                <enrich>
                    <source type="body"/>
                    <target type="property" property="REQUEST"/>
                </enrich>

                <send receive="SimpleServiceSeq">
                    <endpoint name="secure">
                        <address uri="http://localhost:9000/services/SecureStockQuoteService">
                            <enableSec policy="sec_policy"/>
                        </address>
                    </endpoint>
                </send>
            </inSequence>
            <outSequence>
                <drop/>
            </outSequence>
        </target>
    </proxy>
      <sequence name="SimpleServiceSeq">
        <property name="SECURE_SER_AMT" expression="//ns:getQuoteResponse/ns:return/ax21:last"
                xmlns:ns="http://services.samples" xmlns:ax21="http://services.samples/xsd"/>
        <log level="custom">
            <property name="SecureStockQuoteService-Amount" expression="get-property('SECURE_SER_AMT')"/>
        </log>
        <enrich>
            <source type="body"/>
            <target type="property" property="SecureService_Res"/>
        </enrich>
        <enrich>
            <source type="property" property="REQUEST"/>
            <target type="body"/>
        </enrich>
        <send receive="ClientOutSeq">
            <endpoint name="SimpleStockQuoteService">
                <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
            </endpoint>
        </send>
    </sequence>

    <sequence name="ClientOutSeq">
        <property name="SIMPLE_SER_AMT" expression="//ns:getQuoteResponse/ns:return/ax21:last"
                       xmlns:ns="http://services.samples" xmlns:ax21="http://services.samples/xsd"/>
        <log level="custom">
            <property name="SimpleStockQuoteService-Amount" expression="get-property('SIMPLE_SER_AMT')"/>
        </log>
        <enrich>
            <source type="body"/>
            <target type="property" property="SimpleService_Res"/>
        </enrich>

        <filter xpath="fn:number(get-property('SIMPLE_SER_AMT')) > fn:number(get-property('SECURE_SER_AMT'))">
            <then>
                <log>
                    <property name="StockQuote" value="SecureStockQuoteService"/>
                </log>
                <enrich>
                    <source type="property" property="SecureService_Res"/>
                    <target type="body"/>
                </enrich>
            </then>
            <else>
                <log>
                    <property name="StockQuote" value="SimpleStockQuoteService"/>
                </log>
            </else>
        </filter>
         <send/>
    </sequence>

</definitions>

Prerequisites:
We will be using two services in this sample; i.e. SimpleStockQuoteService and SecureStockQuoteService. Therefore the prerequisites of sample 100 is also applied here.

  • Start the Synapse configuration numbered 156: i.e. wso2esb-samples.sh -sn 156
  • Start the Axis2 server and deploy the SimpleStockQuoteService if not already done.

This sample contains a proxy service which provides the seamless integration of SimpleStockQuoteService and SecureStockQuoteService. Once a client send a request to this proxy service, it sends the same request to both these services and resolve the service with cheapest stock quote price.

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