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<document>
<properties>
<title>Apache Synapse - Sample 390</title>
</properties>
<body>
<section name="Sample 390: Introduction to the XQuery Mediator">
<div class="xmlConf"><![CDATA[<definitions xmlns="http://ws.apache.org/ns/synapse">
<!-- the SimpleURLRegistry allows access to a URL based registry (e.g. file:/// or http://) -->
<registry provider="org.apache.synapse.registry.url.SimpleURLRegistry">
<!-- the root property of the simple URL registry helps resolve a resource URL as root + key -->
<parameter name="root">file:repository/conf/sample/resources/</parameter>
<!-- all resources loaded from the URL registry would be cached for this number of milli seconds -->
<parameter name="cachableDuration">15000</parameter>
</registry>
<localEntry key="xquery-key-req"
src="file:repository/conf/sample/resources/xquery/xquery_req.xq"/>
<proxy name="StockQuoteProxy">
<target>
<inSequence>
<property name="body" expression="$body/child::*[position()=1]"/>
<xquery key="xquery-key-req">
<variable name="payload" type="ELEMENT"/>
</xquery>
<send>
<endpoint>
<address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
</endpoint>
</send>
</inSequence>
<outSequence>
<out>
<xquery key="xquery/xquery_res.xq">
<variable name="payload" type="ELEMENT"/>
<variable xmlns:m0="http://services.samples"
name="code" type="STRING"
expression="self::node()//m0:return/m0:symbol/child::text()"/>
<variable xmlns:m0="http://services.samples"
name="price" type="DOUBLE"
expression="self::node()//m0:return/m0:last/child::text()"/>
</xquery>
<send/>
</out>
</outSequence>
</target>
<publishWSDL uri="file:repository/conf/sample/resources/proxy/sample_proxy_1.wsdl"/>
</proxy>
</definitions>]]></div>
<subsection name="Objective">
<p>
Demonstrate how to use the XQuery mediator for message content transformations
</p>
</subsection>
<subsection name="Pre-requisites">
<p>
<ul>
<li>
Deploy the SimpleStockQuoteService in the sample Axis2 server and start Axis2
</li>
<li>
Start Synapse using the configuration numbered 390 (repository/conf/sample/synapse_sample_390.xml)
<div class="command">
Unix/Linux: sh synapse.sh -sample 390<br/>
Windows: synapse.bat -sample 390
</div>
</li>
</ul>
</p>
</subsection>
<subsection name="Executing the Client">
<p>
This example uses the XQuery mediator to perform transformations. This sample
behaves the same as <a href="sample8.html">sample 8</a> and the only difference
is that this sample uses XQuery instead of XSLT for transformation.
</p>
<p>
Send a custom quote request to Synapse as follows.
</p>
<div class="command">ant stockquote -Daddurl=http://localhost:8280/services/StockQuoteProxy -Dmode=customquote</div>
<p>
Request is transformed into a standard stock quote request by the XPery mediator.
The XQuery definition is loaded through a local entry. The response from Axis2
is transformed back to a custom quote response. In this case the XQuery definition
is loaded from the registry.
</p>
</subsection>
</section>
<p><a href="../samples.html">Back to Catalog</a></p>
</body>
</document>