Better Software - March 2008 - (Page 26)

Figure 1: Web services consumer-producer setup In addition, it produces the WSDL file that defines the Web service interface. This file provides all the necessary information for the consumer, SOAPSonar, to send SOAP requests to the target Web service. SOAPSonar consumes and interprets the WSDL-based API published by the producer and invokes the Web service. BUILDING A SIMPLE WEB SERVICE Follow these steps to build your first Web service: 1. Download and install .NET WebMatrix from www.asp.net/Webmatrix/download.aspx?tabindex=4. 2. Go to: Start > All Programs > Microsoft ASP .NET Web Matrix > ASP .NET Web Matrix. 3. You will be prompted with the screen shown in figure 2. Fill in the information as shown. Select Web Services in the left panel and the Simple template in the right panel. You can create a C:\WebServices folder for your file location. Enter MathWS.asmx as the filename and pick C# as the language that the wizard will use to autogenerate the code. Also, declare the class as MathWS, and the namespace as math. 4. With the values selected and entered in step 3, WebMatrix auto-generates a Web service for you with the code in figure 3. 5. Click the Start button in the IDE and it will prompt you to start the Web application on port 9090, as shown in figure 4. Make sure your local firewall is turned off. 6. A Web browser with operation Add(int a, int b) will appear. You can click this and start experimenting with your first Web service. You are now ready to test your first Web service and determine its functional, performance, and interoperability characteristics. In the following sections, you will learn specific Web services-testing techniques. Figure 2: Inputs for generating a simple Web service MathWS.asmx REQUIRED SOFTWARE AND SETUP To illustrate building and testing your first Web service, one with a single operation Add(int a, int b), the following components are required: • Microsoft .NET WebMatrix: This installer includes an IDE for building Web services and a lightweight Web server. • Crosscheck Networks SOAPSonar Enterprise Edition: This is a .NET-based SOAP client used for comprehensive Web services testing. Both components can be installed on a Windows 2000/ XP/2003 machine with moderate resources. Figure 1 shows a typical Web service deployment with a consumer-producer interaction model. The producer is the .NET WebMatrix server that supplies a Web service with the Add(int a, int b) operation that applications can invoke, typically remotely, over HTTP(S). 26 BETTER SOFTWARE MARCH 2008 TEST CLIENT SETUP SOA testers must ensure that Web services deployed within www.StickyMinds.com http://www.asp.net/Webmatrix/download.aspx?tabindex=4 http://www.StickyMinds.com

Table of Contents Feed for the Digital Edition of Better Software - March 2008

Better Software - March 2008 Contents Mark Your Calendar Contributors eLightenment Technically Speaking Code Craft Test Connection Management Chronicles Cover Story: Breaking Ground On SOA Software Development Worst Practices Mind the Gap Product Announcements 10 Things You Might Not Know About... The Last Word Ad Index

Better Software - March 2008

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