gistfile1.txt

    <custom-transformer name="StringToNameString" class="org.mule.example.hello.StringToNameString"/>
    <custom-transformer name="NameStringToChatString" class="org.mule.example.hello.NameStringToChatString"/>
    <custom-transformer name="ChatStringToString" class="org.mule.example.hello.ChatStringToString"/>
    <custom-transformer name="HttpRequestToNameString" class="org.mule.example.hello.HttpRequestToNameString"/>
    <custom-transformer name="ExceptionToString" class="org.mule.example.hello.ExceptionToString"/>
    <custom-transformer name="HttpRequestToParameter" class="org.mule.transport.servlet.transformers.HttpRequestToParameter"/>
    <custom-transformer name="ObjectToString" class="org.mule.transformer.simple.ObjectToString"/>

    <flow name="Hello World">
        <composite-source>
            <!-- Incoming HTTP requests -->
            <inbound-endpoint address="http://localhost:8888" transformer-refs="HttpRequestToNameString" exchange-pattern="request-response"/>

            <!-- Incoming Servlet requests -->
            <inbound-endpoint address="servlet://name" transformer-refs="HttpRequestToNameString" exchange-pattern="request-response"/>

            <!-- Incoming VM requests -->
            <vm:inbound-endpoint path="greeter" transformer-refs="StringToNameString" exchange-pattern="request-response"/>
        </composite-source>

        <message-filter>
            <not-filter>
                <wildcard-filter pattern="/favicon.ico"/>
            </not-filter>
        </message-filter>

        <component class="org.mule.example.hello.Greeter"/>

        <choice>
            <when expression="payload instanceof org.mule.example.hello.NameString" evaluator="groovy">
                <vm:outbound-endpoint path="chitchatter" exchange-pattern="request-response"/>
            </when>
            <when expression="payload instanceof java.lang.Exception" evaluator="groovy">
                <vm:outbound-endpoint path="userErrorHandler" exchange-pattern="request-response"/>
            </when>
        </choice>

        <!-- Route unexpected errors to separate error handler -->
        <default-exception-strategy>
            <vm:outbound-endpoint path="systemErrorHandler" exchange-pattern="one-way"/>
        </default-exception-strategy>
    </flow>