http://ricston.com/blog/?p=2607

mule-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns="http://www.mulesoft.org/schema/mule/core"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:spring="http://www.springframework.org/schema/beans"
      xmlns:http="http://www.mulesoft.org/schema/mule/http"
      xmlns:jdbc="http://www.mulesoft.org/schema/mule/jdbc"
      xmlns:rest="http://www.mulesoft.org/schema/mule/rest"
      xsi:schemaLocation="
        http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
        http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
        http://www.mulesoft.org/schema/mule/jdbc http://www.mulesoft.org/schema/mule/jdbc/current/mule-jdbc.xsd
        http://www.mulesoft.org/schema/mule/rest http://www.mulesoft.org/schema/mule/rest/current/mule-rest.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
 
    ...
 
    <rest:config/>
 
    <flow name="RestFlow">
        <http:inbound-endpoint address="http://localhost:8080"/>
 
        <rest:router templateUri="/task/{taskId}">
            <rest:get>
                <expression-transformer evaluator="variable" expression="taskId"/>
                <jdbc:outbound-endpoint exchange-pattern="request-response" queryKey="getTask"/>
                <custom-transformer class="com.ricston.TaskTransformer"/>
            </rest:get>
            <rest:post>
                <expression-transformer evaluator="variable" expression="taskId"/>
                <jdbc:outbound-endpoint queryKey="writeTask"/>
                <expression-transformer evaluator="string" expression="Task #[payload] saved"/>
            </rest:post>
        </rest:router>
 
        <rest:router templateUri="/tasks">
            <rest:get>
                <jdbc:outbound-endpoint exchange-pattern="request-response" queryKey="getTaskList"/>
                <custom-transformer class="com.ricston.TaskListTransformer"/>
            </rest:get>
        </rest:router>
    </flow>
</mule>