This section explains, through an example scenario, how the Messaging Gateway EIP can be implemented using WSO2 ESB. The following topics are covered:Table of Contents
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- Download and install WSO2 ESB from http://wso2.com/products/enterprise-service-bus. For a list of prerequisites and step-by-step installation instructions, refer to Getting Started Installation Guide in the WSO2 ESB documentation.
- Start the sample Axis2 server. For instructions, refer to the section Setting Up the ESB Samples Setup - Starting Sample Back-End Servicesthe Axis2 server in the WSO2 ESB documentation.
- Copy the sample_proxy_3.wsdl file into your
<ESB_HOME>/repository/samples/resources/proxydirectory.
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Start the ESB server and log into its management console UI (https://localhost:9443/carbon). In the management console, navigate to the Main Menu, click Service Bus and then Source View menu and click Source View in the Service Bus section. Next, copy and paste the following configuration, which helps you explore the example scenario, to the source view.
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Simulating the sample scenario
If you navigate to http://localhost:9000/services/SimpleStockQuoteService, you can see the WSDL file of the back-end server. There are five methods exposed externally, but the Proxy Service SimpleQuoteProxy exposes only four externally, filtering out the getFullQuote method. See the SimpleQuoteProxy WSDL file in http://localhost:8280/services/StockQuoteProxy?wsdl.
Send the following request using a SOAP client like SoapUI to the SimpleQuoteProxy service.
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After sending the above message to the server, you'll get a server error as 'The endpoint reference (EPR) for the Operation not found is /services/StockQuoteProxy and the WSA Action = urn:getFullQuote. ' The reason for this error is that the getFullQuote method is not exposed to SimpleQuoteProxy, although the back-end server supports it.
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