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This sample demonstrates how to use the Validate Mediator for XML schema validation and how to use the usage of the local registry (local entries) for storing to store configuration metadata.  Here you will send a message is sent from the sample client to the back-end service through the ESB and shows how a static XML fragment could be made available to the ESB's local registry. It is assumed that the resources defined in the local registry are static (never changes over the lifetime of the configuration) and may be specified as a source URL, inline text or inline XML.

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

    <localEntry key="validate_schema">
        <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://services.samples"
                   elementFormDefault="qualified" attributeFormDefault="unqualified"
                   targetNamespace="http://services.samples">
            <xs:element name="getQuote">
                <xs:complexType>
                    <xs:sequence>
                        <xs:element name="request">
                            <xs:complexType>
                                <xs:sequence>
                                    <xs:element name="stocksymbol" type="xs:string"/>
                                </xs:sequence>
                            </xs:complexType>
                        </xs:element>
                    </xs:sequence>
                </xs:complexType>
            </xs:element>
        </xs:schema>
    </localEntry>

    <sequence name="main">
        <in>
            <validate>
                <schema key="validate_schema"/>
                <on-fail>
                    <!-- if the request does not validate againt schema throw a fault -->
                    <makefault>
                        <code value="tns:Receiver" xmlns:tns="http://www.w3.org/2003/05/soap-envelope"/>
                        <reason value="Invalid custom quote request"/>
                    </makefault>
                </on-fail>
            </validate>
        </in>
        <send/>
    </sequence>
</definitions>

This configuration file  synapse_sample_7.xml is available in the <ESB<EI_HOME>/repository/samples directorysamples/service-bus directory.

To build the sample

1. Start the ESB Profile with the sample 7 configuration. For instructions on starting a sample ESB configuration, see Starting the ESB with a sample configuration.
   
   The operation log keeps running until the server starts, which usually takes several seconds. Wait until the server has fully booted up and displays a message similar to "WSO2 Carbon started in n seconds."

2. Start the Axis2 server. For instructions on starting the Axis2 server, see Starting the Axis2 server.

3. Deploy the back-end service SimpleStockQuoteService. For instructions on deploying sample back-end services, see Deploying sample back-end services.

   Now you have a running ESB instance and a back-end service deployed. In the next section, we will send a message to the back-end service through the ESB using a sample client.

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• Run the following command from the <ESB<EI_HOME>/samples/axis2Client directory.

  Code Block
  language bash
  ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/

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