Examples of javax.servlet.ServletContext.addServlet()

javax.servlet.ServletContext.addServlet()
@param servletName @param className @return TODO @throws IllegalStateException If the context has already been initialised @throws UnsupportedOperationException If called from a{@link ServletContextListener#contextInitialized(ServletContextEvent)}method of a {@link ServletContextListener} that was not defined in aweb.xml file, a web-fragment.xml file nor annotated with {@link javax.servlet.annotation.WebListener}. For example, a {@link ServletContextListener} defined in a TLD would not be able touse this method. @since Servlet 3.0 TODO SERVLET3 - Add comments

public class CviewerServletListener implements ServletContextListener {


    public void contextInitialized(ServletContextEvent sce) {
        ServletContext sc = sce.getServletContext();
        // Regist servlet
        ServletRegistration sr = sc.addServlet("ClassViewer",
                "org.apache.geronimo.testsuite.servlet3.app.CViewerServlet");
        sr.addMapping("/ClassViewer");


        // Register Filter
        FilterRegistration fr = sc.addFilter("CViewerFilter",

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    public void contextInitialized(ServletContextEvent arg0) {
        ServletContext servletContext = arg0.getServletContext();
        try {
            // addServlet takes instance created by ServletContext.createServlet()
            Servlet servlet5_1 = servletContext.createServlet(SampleServlet5.class);
            Dynamic dynamic5_1 = servletContext.addServlet("Sample Servlet 5_1", servlet5_1);
            dynamic5_1.addMapping("/SampleServlet5_1", "/SampleServlet5_1/*");


            // addServlet takes instance which is not created by ServletContext.createServlet()
            Dynamic dynamic5_2 = servletContext.addServlet("Sample Servlet 5_2", new SampleServlet5());
            dynamic5_2.addMapping("/SampleServlet5_2", "/SampleServlet5_2/*");

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            Servlet servlet5_1 = servletContext.createServlet(SampleServlet5.class);
            Dynamic dynamic5_1 = servletContext.addServlet("Sample Servlet 5_1", servlet5_1);
            dynamic5_1.addMapping("/SampleServlet5_1", "/SampleServlet5_1/*");


            // addServlet takes instance which is not created by ServletContext.createServlet()
            Dynamic dynamic5_2 = servletContext.addServlet("Sample Servlet 5_2", new SampleServlet5());
            dynamic5_2.addMapping("/SampleServlet5_2", "/SampleServlet5_2/*");


            // addServlet takes className
            Dynamic dynamic5_3 = servletContext.addServlet("Sample Servlet 5_3", SampleServlet5.class);
            dynamic5_3.addMapping("/SampleServlet5_3", "/SampleServlet5_3/*");

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            // addServlet takes instance which is not created by ServletContext.createServlet()
            Dynamic dynamic5_2 = servletContext.addServlet("Sample Servlet 5_2", new SampleServlet5());
            dynamic5_2.addMapping("/SampleServlet5_2", "/SampleServlet5_2/*");


            // addServlet takes className
            Dynamic dynamic5_3 = servletContext.addServlet("Sample Servlet 5_3", SampleServlet5.class);
            dynamic5_3.addMapping("/SampleServlet5_3", "/SampleServlet5_3/*");


            //
            Servlet servlet6 = servletContext.createServlet(SampleServlet6.class);
            Dynamic dynamic6 = servletContext.addServlet("Sample Servlet 6", servlet6);

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            Dynamic dynamic5_3 = servletContext.addServlet("Sample Servlet 5_3", SampleServlet5.class);
            dynamic5_3.addMapping("/SampleServlet5_3", "/SampleServlet5_3/*");


            //
            Servlet servlet6 = servletContext.createServlet(SampleServlet6.class);
            Dynamic dynamic6 = servletContext.addServlet("Sample Servlet 6", servlet6);
            dynamic6.addMapping("/SampleServlet6_1");


        } catch (ServletException e) {
            e.printStackTrace();
        }

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    public void contextInitialized(ServletContextEvent servletContextEvent) {


        ServletContext servletContext = servletContextEvent.getServletContext();


        //dynamic register /SampleServlet3Dynamic and security constraint
        Dynamic servlet3Dynamic = servletContext.addServlet("SampleServlet3Dynamic", SampleServlet3.class);
        servlet3Dynamic.addMapping("/SampleServlet3Dynamic", "/TestDynamic");
        HttpConstraintElement httpConstraintElement = new HttpConstraintElement();
        List<HttpMethodConstraintElement> httpMethodConstraintElements = new ArrayList<HttpMethodConstraintElement>();
        httpMethodConstraintElements.add(new HttpMethodConstraintElement("GET", new HttpConstraintElement(ServletSecurity.TransportGuarantee.NONE, "RoleC")));
        ServletSecurityElement servletSecurityElement = new ServletSecurityElement(httpConstraintElement, httpMethodConstraintElements);

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        sc.addListener("com.sishuok.chapter2.web.listener.DynamicServletContextListener");


        sc.addFilter("dynamicFilter", DynamicFilter.class);


        ServletRegistration.Dynamic dynamic1 = sc.addServlet("dynamicServlet1", DynamicServlet.class);
        dynamic1.setLoadOnStartup(1);
        dynamic1.addMapping("/dynamic1");


        ServletRegistration.Dynamic dynamic2 = sc.addServlet("dynamicServlet2", "com.sishuok.chapter2.web.servlet.DynamicServlet");
        dynamic2.addMapping("/dynamic2");

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        ServletRegistration.Dynamic dynamic1 = sc.addServlet("dynamicServlet1", DynamicServlet.class);
        dynamic1.setLoadOnStartup(1);
        dynamic1.addMapping("/dynamic1");


        ServletRegistration.Dynamic dynamic2 = sc.addServlet("dynamicServlet2", "com.sishuok.chapter2.web.servlet.DynamicServlet");
        dynamic2.addMapping("/dynamic2");


        ServletRegistration.Dynamic dynamic3 = sc.addServlet("dynamicServlet3", new DynamicServlet());
        dynamic3.addMapping("/dynamic3");

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        dynamic1.addMapping("/dynamic1");


        ServletRegistration.Dynamic dynamic2 = sc.addServlet("dynamicServlet2", "com.sishuok.chapter2.web.servlet.DynamicServlet");
        dynamic2.addMapping("/dynamic2");


        ServletRegistration.Dynamic dynamic3 = sc.addServlet("dynamicServlet3", new DynamicServlet());
        dynamic3.addMapping("/dynamic3");


    }


    @Override

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    @Override
    public void contextInitialized(ServletContextEvent event) {
        ServletContext context = event.getServletContext();
        socketManager = new DefaultSocketManager();
        socketIOServlet = new BaseSocketIOServlet(socketManager);
        ServletRegistration.Dynamic registration = context.addServlet("socket.io", socketIOServlet);
        registration.addMapping("/socket.io/*");
        registration.setAsyncSupported(true);
        registration.setLoadOnStartup(1);
        chatManager = new ChatManager(socketManager.of(SocketManager.DEFAULT_NAMESPACE_NAME));
        chatManager.setup();

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