Sample 353: Using Ruby Scripts for Mediation

<definitions xmlns="http://ws.apache.org/ns/synapse">

    <localEntry key="stockquoteScript" src="file:repository/samples/resources/script/stockquoteTransform.rb"/>
    <in>
        <!-- transform the custom quote request into a standard quote request expected by the service -->
        <script language="rb" key="stockquoteScript" function="transformRequest"/>

        <!-- send message to real endpoint referenced by name "stockquote" and stop -->
        <send>
            <endpoint name="stockquote">
                <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
            </endpoint>
        </send>
    </in>
    <out>
        <!-- transform the standard response back into the custom format the client expects -->
        <script language="rb" key="stockquoteScript" function="transformResponse"/>
        <send/>
    </out>
</definitions> 

<x><![CDATA[
require 'rexml/document'
include REXML

def transformRequest(mc)
   newRequest= Document.new '<m:getQuote xmlns:m="http://services.samples/xsd">'<<
      '<m:request><m:symbol></m:symbol></m:request></m:getQuote>'
   newRequest.root.elements[1].elements[1].text = mc.getPayloadXML().root.elements[1].get_text
   mc.setPayloadXML(newRequest)
end

def transformResponse(mc)
   newResponse = Document.new '<m:CheckPriceResponse xmlns:m="http://services.samples/xsd"><m:Code>' <<
      '</m:Code><m:Price></m:Price></m:CheckPriceResponse>'
   newResponse.root.elements[1].text = mc.getPayloadXML().root.elements[1].elements[1].get_text
   newResponse.root.elements[2].text = mc.getPayloadXML().root.elements[1].elements[2].get_text
   mc.setPayloadXML(newResponse)
end
]]></x>