Sample 391: Using Data from an External XML Document within XQuery

Note that WSO2 EI is shipped with the following changes to what is mentioned in this documentation:

<PRODUCT_HOME>/repository/samples/ directory that includes all Integration profile samples is changed to <EI_HOME>/samples/service-bus/.
<PRODUCT_HOME>/repository/samples/resources/ directory that includes all artifacts related to the Integration profile samples is changed to <EI_HOME>/samples/service-bus/resources/.

Objective: Demonstrate the use of XQuery mediator to import external XML documents to the XQuery engine

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

    <!-- the SimpleURLRegistry allows access to  URL based registry (e.g. file:/// or http://) -->
    <registry provider="org.wso2.carbon.mediation.registry.ESBRegistry">
        <!-- the root property of the simple URL registry helps resolve a resource URL as root + key -->
        <parameter name="root">file:repository/samples/resources/</parameter>
        <!-- all resources loaded from the URL registry would be cached for this number of milli seconds -->
        <parameter name="cachableDuration">15000</parameter>
    </registry>

    <proxy name="StockQuoteProxy">
        <target>
            <inSequence>
                <send>
                    <endpoint>
                        <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
                    </endpoint>
                </send>
            </inSequence>
            <outSequence>
                <out>
                    <xquery key="xquery/xquery_commisson.xq">
                        <variable name="payload" type="ELEMENT"></variable>
                            <variable name="commission" type="ELEMENT" key="misc/commission.xml"></variable>
                    </xquery>
                    <send/>
                </out>
            </outSequence>
        </target>
        <publishWSDL uri="file:repository/samples/resources/proxy/sample_proxy_1.wsdl"/>
    </proxy>
</definitions>

Prerequisites:

Deploy the SimpleStockQuoteService in sample Axis2 server and start it on port 9000.
Start ESB with the sample configuration 391 (i.e. wso2ei-samples -sn 391).

In this sample, data from commission.xml document is used inside XQUERY document. The stock quote price from the response and commission from the commission.xml document will be added and given as a new price .

Invoke the client as follows.

ant stockquote -Daddurl=http://localhost:8280/services/StockQuoteProxy