repository/conf/sample/synapse_sample_2.xml

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<!-- switch-case mediator and setting and reading of local properties on a message -->
<definitions xmlns="http://ws.apache.org/ns/synapse">
    <switch source="//m0:getQuote/m0:request/m0:symbol" xmlns:m0="http://services.samples/xsd">
        <case regex="IBM">
            <!-- the property mediator sets a local property on the *current* message -->
            <property name="symbol" value="Great stock - IBM"/>
        </case>
        <case regex="MSFT">
            <property name="symbol" value="Are you sure? - MSFT"/>
        </case>
        <default>
            <!-- it is possible to assign the result of an XPath expression as well -->
            <property name="symbol"
                  expression="fn:concat('Normal Stock - ', //m0:getQuote/m0:request/m0:symbol)"
                  xmlns:m0="http://services.samples/xsd"/>
        </default>
    </switch>

    <log level="custom">
        <!-- the get-property() XPath extension function allows the lookup of local message properties
            as well as properties from the Axis2 or Transport contexts (i.e. transport headers) -->
        <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/>
</definitions>