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CHAPTER 3 Quick Tour
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The wizard generates a WSDL file that describes the Web service, and then generates and updates all the configuration files The wizard starts or restarts the application server to complete the deployment step At this point you have a running Web service The next step is to generate client code to access it The wizard next creates a new project for the client Web application and generates a Java client proxy from the WSDL Using a separate project for the client application is highly advisable since you probably don t want to deploy the test client along with the Web service Also, using a separate project avoids potential name conflicts between the generated client code and the Web service code The wizard then generates a JSP test client application that accesses the Web service using the client proxy This client application is mainly for test purposes, but you can also look at the generated code for examples of how to invoke Web services using the client proxy The wizard configures and starts a TCP/IP monitor to forward requests to and responses from the Web service The TCP/IP monitor therefore behaves just like the Web service, but in addition it captures the SOAP messages and presents them in a handy view The wizard configures the JSP test client to use the URL of the monitor instead of the Web service Finally, the wizard runs the test client so you can begin exercising the Web service
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Use a Test Client
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The test client is created in the Web1Client Web project It consists of a set of generated JSP pages that use a Java proxy to access the Web service Unlike the general-purpose Web Service Explorer tool provided by WTP, it is designed specifically to test the Web service you just created Do the following to test your Web service: 1 WTP opens the generated JSP test client application in a Web browser (see Figure 333) The test client lists all the operations in the Web service in the Methods frame on the left-hand side of the Web browser The test client also lets you view and modify the URL of the Web service endpoint using the getEndpoint and setEndpoint methods 2 Your Web service has a single operation, lookupFullname, which takes as input a user id and returns as output the user s full name Click the lookupFullname link to open an input form in the Inputs frame in the top right corner of the Web browser Enter a valid user id, ryman for example, and click the Invoke button This sends the user id in a SOAP request message to the Web service The test client receives the SOAP response message and displays the result in the Results frame at the bottom right corner of the Web browser
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Iteration 4: Web Services
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Figure 333 Web Browser TestClientjsp
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Monitor SOAP Messages
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Do the following to monitor the SOAP messages: 1 When you invoked the lookupFullname operation, the request and response were captured and displayed by the TCP/IP monitor (see Figure 334) The TCP/IP monitor can be used to display general HTTP traffic in addition to Web services Web services use XML for both requests and responses, so select XML from the drop-down menus You can see the SOAP message envelopes used to send the user id and return the full name The TCP/IP monitor normally filters out the HTTP headers, but these can be displayed by selecting Headers from the drop-down menu at the top right corner of the view 2 Invoke the lookupFullname operation a few more times to generate more messages in the TCP/IP monitor Feel free to experiment with the other options in the TCP/IP Monitor view
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