Sample 600 : Simple Message Transformation - Rule Mediator for Message Transformation

Objective: Simple message transformation - Rule mediator for message transformation.

<!-- Simple rule based transformation (changing message )  -->
<definitions xmlns="http://ws.apache.org/ns/synapse">

    <sequence name="main">
        <in>

            <rule xmlns="http://wso2.org/carbon/rules">
                <source>soapBody</source>
                <target action="replace" xmlns:m0="http://services.samples" resultXpath="//m0:symbol"
                        xpath="//m0:getQuote/m0:request/m0:symbol">soapBody</target>
                <ruleSet>
                    <properties/>
                    <rule resourceType="regular" sourceType="inline">
                        <![CDATA[ package SimpleRoutingRules;

                        rule InvokeIBM
                        when
                        symbol: String()
                        eval( symbol.equals("MSFT") || symbol.equals("SUN") )
                        then
                        update(drools.getWorkingMemory().getFactHandle(symbol),"IBM");
                        end
                        ]]>
                    </rule>
                </ruleSet>
                <input namespace="http://services.samples" wrapperElementName="getQuote">
                    <fact xmlns:m0="http://services.samples" elementName="symbol" namespace="http://services.samples"
                          type="java.lang.String" xpath="//m0:getQuote/m0:request/m0:symbol/child::text()"/>
                </input>
                <output namespace="http://services.samples" wrapperElementName="getQuote">
                    <fact elementName="symbol" namespace="http://services.samples" type="java.lang.String"/>
                </output>
            </rule>
            <send>
                <endpoint>
                    <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
                </endpoint>
            </send>

        </in>
        <out>
            <send/>
        </out>
    </sequence>

</definitions>

Prerequisites:

Start the Synapse configuration numbered 600: (i.e. ./wso2esb-samples.sh -sn 600)
Start the Axis2 server and deploy the SimpleStockQuoteService if not already deployed
In this sample , a simple transformation is happened . If the symbol is either SUN or MSFT , then it will changed into IBM in the SOAP envelope and then invoke the external service.

Run the client as

ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=MSFT

Or as

ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=SUN

Then check the axis2server log or console

Wed July 04 16:33:05 IST 2012 samples.services.SimpleStockQuoteService :: Generating quote for : IBM