How do I log the original message sent into a camel route?

문제

How do I store the original message that came into the route in order to log it?

For example, I'd like to replace "I'M IN SLAVE MODE - DO NOTHING" with the actual message:

 <route>
        <from uri="direct:processOrders"/>
        <bean method="isMaster" ref="hasingleton"/>
        <choice>
            <when>
                <simple>${body} == true</simple>
                <to uri="file:c:/out/messages/?fileExist=Append&amp;fileName=messages.txt"/>
            </when>
            <otherwise>
                <log message="********* I'M IN SLAVE MODE - DO NOTHING"/>
            </otherwise>
        </choice>
    </route>