GETのQuery ParameterをForEachで回しながら、ログに出力するサンプル

mule-config_output_parameters.xml

<?xml version="1.0" encoding="UTF-8"?>
<mule
  xmlns="http://www.mulesoft.org/schema/mule/core"
  xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
  xmlns:http="http://www.mulesoft.org/schema/mule/http"
  xmlns:json="http://www.mulesoft.org/schema/mule/json"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.mulesoft.org/schema/mule/json
  http://www.mulesoft.org/schema/mule/json/current/mule-json.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/db
  http://www.mulesoft.org/schema/mule/db/current/mule-db.xsd
  http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-current.xsd
  http://www.mulesoft.org/schema/mule/core
  http://www.mulesoft.org/schema/mule/core/current/mule.xsd
  http://www.mulesoft.org/schema/mule/ee/tracking
  http://www.mulesoft.org/schema/mule/ee/tracking/current/mule-tracking-ee.xsd">

  <flow name="GetFlow">
  <http:listener config-ref="HTTP_Listener_Configuration" path="/output_queries" doc:name="Recieve HTTP request" allowedMethods="GET">
  </http:listener>

    <logger doc:name="Log the payload" level="INFO" message="About to echo #[message.inboundProperties.'http.query.params']"/>

    <!-- Query Parameter分ループする -->
    <foreach collection="#[message.inboundProperties.'http.query.params'.entrySet()]" doc:name="For Each">

      <!-- payload変数にQuery Parameterの１つ分が入っている -->
      <logger doc:name="Log the payload" level="INFO" message="payload(#[counter]): #[payload]"/>
      <logger doc:name="Log the payload" level="INFO" message="payload(#[counter]).key: #[payload.key]"/>
      <logger doc:name="Log the payload" level="INFO" message="payload(#[counter]).value: #[payload.value]"/>
  </foreach>
  </flow>
</mule>