repository/conf/sample/synapse_sample_2.xml

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<synapse xmlns="http://ws.apache.org/ns/synapse">

    <!-- switch-case mediator and setting and reading of local properties on a message -->
    <rules>

        <!-- introduction to switch-case-default mediator -->
        <switch source="//m0:getQuote/m0:request/m0:symbol" xmlns:m0="http://services.samples/xsd">
            <case regex="IBM">
                <!-- the set-property sets a local property on the current message-->
                <!-- its value could be set as a static string as follows -->
                <set-property name="symbol" value="Great stock - IBM"/>
            </case>
            <case regex="MSFT">
                <set-property name="symbol" value="Are you sure? - MSFT"/>
            </case>
            <default>
                <!-- it is possible to assign the result of an XPath expression as the value of a message property -->
                <set-property name="symbol"
                              expression="fn:concat('Normal Stock - ', //m0:CheckPriceRequest/m0:Code)"
                              xmlns:m0="http://www.apache-synapse.org/test"/>
            </default>
        </switch>

        <log level="custom">
            <!-- the get-property() XPath extension function allows the lookup of local message properties -->
            <property name="symbol" expression="get-property('symbol')"/>
            <!-- the get-property() function supports the implicit message headers To/From/Action/FaultTo/ReplyTo -->
            <property name="epr" expression="get-property('To')"/>
        </log>

        <!-- Send the messages where they are destined to (i.e. the 'To' EPR of the message) -->
        <send/>

    </rules>

</synapse>