Getting Started in Visual Studio .NET

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Getting Started
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A basic example is provided in this section to help you start using the Grinder The example is based on a web application, composed of three JSP pages: Q Q Q login j sp starts a new servlet session and stores a user name in it, which is retrieved as a parameter from the HTTP request status j sp checks the existence of the user name in the servlet session logout j sp also checks the user name in the session If it exists then it invalidates the current session
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The following listing shows the first page, login j sp:
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<% Systemoutprintln("Trace: <html> <body> login"); %>
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< % String user = requestgetParameter("user" ) ; if ((user == null) || (userequals( " " ) ) ) { user = "default"; } sessionsetAttribute("user", user); %> <p>User <b><%= user %></b> logged in!</p> <a href="statusjsp">status</a> </body> </html>
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We are interested in knowing the download time of each of the three pages for different numbers of concurrent users The download time of a page is also referred to as the response time, that is, the response time of the request for the page The Grinder configuration is established in a properties file called grinder properties, which must be present in the JVM classpath We set up the properties for the Grinder to request the URLs of the JSP pages, including the request parameters, as shown in this excerpt from the grinder properties file:
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grindercycleParams= \ [keepSession]true,\ [logHtml]false,\ [urlO]http://localhost:7001/loginjsp user=fofito&password=bond007,\ [urlllhttp://local host: 7001/stat usjsp,\ [ur!2]http://localhost:7001/logoutjsp,\ [okO]User <b>fofito</b> logged i n ! , \ [okl]User <b>fofito</b> in session,\ [ok2]User <b>fofito</b> logged out!
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The grinder cycleParams property holds the URLs of the JSP pages in strings delimited between the [urln] string and the comma The property also has other parameters such as the validation string, the session, and the log These and other properties will be fully explained in the next few sections Two other properties, grinderjvms and grinder threads, configure the number of users The result of multiplying both properties gives the number of concurrent users simulated by the Grinder The length of the test is set up with the grinder times property This property indicates the number of times the Grinder will iterate through the URLs
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The time between requests is specified in the grinder sleepMillis property This property improves the mimicking of the browser user accessing the URLs, and is also known as 'user think time' The properties just described have the following values in the properties file provided:
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grinderjvms=2 grinderthreads=3 grindertimes=5 grindersleepMillis=5000
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These define the execution of two instances of the Grinder, each with three threads, effectively simulating six users Each thread will execute the test script five times with a think time of five seconds The steps for running the WebLogic server with the JSP pages and the Grinder are described next Both programs will be started in their own command windows 1 2 Open two command line windows The first will run the WebLogic server with the sample JSP pages, while the second will run the Grinder In the Grinder window, change directory to the source for 10, and set the environment:
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cd \wlsbook\src\clO
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C:\>
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C:\wlsbook\src\clO> setenv Current settings: Java Home = c:\j dkl3 WebLogic Home = c:\weblogic Grinder Home = c:\wlsbook\src\clO CLASSPATH = ;c:\weblogic\lib\weblogic510sp5bootjar;c:\weblogic\ classes\boot;c:Xweblogic\lib\weblogic510sp5jar;c:\weblogic\1icense;c:\weblogic\cl asses ,-c: \weblogic\lib\weblogicaux jar;c: \wlsbook\src\clO\lib\grinderl_6_0 jar PATH =
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c:\wlsbook\bin;c:\jdkl3\bin;C:\WINNT\system32;C:\WINNT C:\wlsbook\src\clO>
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Staying in the Grinder window, deploy the Web application to the server directory by typing the following:
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C:\wlsbook\src\clO> make all C:\wlsbook\src\clO> make deploy deploying JSPs xcopy /E c:\wlsbook\src\clO\jsp\\*jsp c:\wlsbook\srv\clO-srv\public_html C:\wlsbook\src\clO\jsp\loginjsp C:\wlsbook\src\clO\jsp\logoutjsp C:\wlsbook\src\clO\jsp\statusjsp 3 File(s) copied copy c:\wlsbook\src\clO\ejb\\*jar c:\wlsbook\srv\clO-srv\ejb c:\wlsbook\src\clO\ejb\\ejb_basic_statelessSessionjar 1 file(s) copied
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In the WebLogic window, change to the wlsbook directory, set the environment for 10 and start the server as in the previous chapters, by typing the startwls command: