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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"><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" |
| xmlns:ax21="http://services.samples/xsd" name="code" type="STRING" |
| expression="self::node()//m0:return/ax21:symbol/child::text()"/> |
| <variable xmlns:m0="http://services.samples" |
| xmlns:ax21="http://services.samples/xsd" name="price" |
| type="DOUBLE" |
| expression="self::node()//m0:return/ax21: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> |
