Tomcat and ServletsTutorial OverviewTomcat OverviewTomcat SystemSetting Up Tomcat on CDFStart Tomcat ServerStop Tomcat ServerDirectory StructureInstalling and Compiling ServletsHelloWorld InterfaceAdding a Servlet to a Web ApplicationPrintEnv InterfaceSysdeo Eclipse Tomcat Launcher pluginSoftware PrerequisiteSetup Tomcat in EclipseHelloWorld ExampleHelloServletWeb.xmlTomcat and ServletsHaifeng LiuTutorial Overview Tomcat Overview Setting Up and Running Tomcat on CDF Installing and Running Servlets on CDF Setting up Sysdeo Eclipse Tomcat Launcher plugin FAQ?Tomcat Overview Tomcat is the servlet container History: ASF: JServ – performance  Sun: Servlet Engine -- specification Requirements and Quality Goals: Strict adherence to Sun’s JSP/Servlet specification, Interoperability, Modifiability, Performance, Scalability, High-Availability, Security, …--- Jakarta TomcatTomcat SystemSetting Up Tomcat on CDF Status: Installed with user privileges in /u/csc309h/lib/brad/tomcat-5.0.27 Step 1 – go to website, read instructionshttp://www.cs.toronto.edu/~delara/courses/csc309/resources/csc309guide.html#WebServer Step 2 – download the tar file tomcat.tar.gz Step 3 – untar it (tar xvz tomcat.tar.gz) and copy the files into a working directory which is refered ase.g. ~/csc309/ Inside tomcat:Bin, conf, logs, webapps, workStart Tomcat Server Step 1 -- cd ~/csc309/tomcat/bin Step 2 -- Run the script start.sh (may need to chmod a+x *.sh ) ./start.sh Step 3 -- Enter the port number. Tomcat will use 3 ports, the number entered and the next two (e.g., if you are assigned port 32000, tomcat will use 32000, 32001, 32002).  Step 4 – check /bin/ps -ef | grep your_user_id Step 5 – view http://localhost:your_port_numberStop Tomcat Server To stop your server, run bin/stop.sh.  Always remember to stop your server before logging off CDF.Directory Structure Bin – Startup/shutdown scripts and other useful files.  Conf – Configuration files, including modules.xml, server.xml, and a number of apps-<name>.xml.  Logs – event log file for each day Webapps – web application files Wok -- intermediate files (such as compiled JSP files) during its work. If you delete this directory while Tomcat is running you will not be able to execute JSP pages!Installing and Compiling Servlets Step 1 -- Download the sample files, untar it, put into webapps Step 2 -- Compile the Java class  Include the following jar file in your CLASSPATH /u/csc309h/lib/tomcat-5.0.27/common/lib/servlet-api.jar. setenv CLASSPATH ${CLASSPATH}: /u/csc309h/lib/tomcat-5.0.27/common/lib/servlet-api.jar cd ~/csc309/tomcat/webapps/csc309/WEB-INF/classes Compile the servlet javac HelloWorld.java Step 3 -- Start Tomcat  Step 4 – Start Browser: http://127.0.0.1:yourPortNumber/csc309/servlet/HelloWorldHelloWorld InterfaceAdding a Servlet to a Web Application Step 1 – Download PrintEnv.java and copy it to ~/csc309/tomcat/webapps/csc309/WEB-INF/classes Step 2 -- Compile PrintEnv.java Step 3 – Add the following entries to the application descriptor located at ~/csc309/tomcat/webapps/csc309/WEB-INF/web.xml. <servlet> <servlet-name>PrintEnv</servlet-name> <servlet-class>PrintEnv</servlet-class> </servlet> <servlet-mapping> <servlet-name>PrintEnv</servlet-name> <url-pattern>/servlet/PrintEnv</url-pattern> </servlet-mapping> Step 4 -- Restart Tomcat  Step 5 – Open browser to http://127.0.0.1:yourPortNumber/csc309/servlet/PrintEnvPrintEnv InterfaceSysdeo Eclipse Tomcat Launcher plugin Starting, stopping and restarting Tomcat 4.x, 5.0.x, 3.3  Registering Tomcat process to Eclipse debugger  Creating a WAR project (wizard can update server.xml file)  Adding Java Projects to Tomcat classpath Setting Tomcat JVM parameters, classpath and bootclasspath Exporting a Tomcat project to a WAR File  Choosing Tomcat configuration file  Capability to use a special Tomcat classloader to have classes in several java projects loaded at the same classloader level than classes in a Tomcat project, see readmeDevLoader.html(Thanks Martin Kahr)Software Prerequisite Tomcat Server –”http://jakarta.apache.org/tomcat/” Eclipse 3.X –“http://www.eclipse.org/downloads/index.php ” Sysdeo Eclipse tomcat Launcher plugin --”http://www.sysdeo.com/eclipse/tomcatPlugin.html”Setup Tomcat in Eclipse Enable tomcat Go to the menu "Window-> Preferences"  go to "Tomcat" and select your Tomcat version  adjust the field "Tomcat Home" to point to the install directory  Add a new user scroll down the menu point "Tomcat" and click the item "Tomcat Manager App"  add a username and a password  click on "Add user to tomcat-users.xml" Test Start Tomcat ServerHelloWorld Example Open a new project select "Tomcat Project"..., click Next button call our new project "Hello World"  adjust URI http://localhost:8080/HelloWorld/hello  create a new class named HelloServlet in the directory WEB-INF/src create the file web.xml in the directory WEB-INF (Note: not in WEB-INF/src!!!)  Start browser "http://localhost:8080/HelloWorld/hello"HelloServletimport java.io.*;import javax.servlet.http.*;import javax.servlet.*;public class HelloServlet extends HttpServlet {public void doGet (HttpServletRequest req,HttpServletResponse res) throws ServletException, IOException {PrintWriter out = res.getWriter();out.println("Hello, Brave new World!");out.close();}}Web.xml<!DOCTYPE web-app PUBLIC'-//Sun Microsystems, Inc.//DTD Web Application