List of usage examples for javax.servlet ServletContext createServlet
public <T extends Servlet> T createServlet(Class<T> clazz) throws ServletException;
From source file:com.jsmartframework.web.manager.ContextControl.java
@Override @SuppressWarnings("unchecked") public void contextInitialized(ServletContextEvent event) { try {//from w ww.ja v a 2 s . c o m ServletContext servletContext = event.getServletContext(); CONFIG.init(servletContext); if (CONFIG.getContent() == null) { throw new RuntimeException("Configuration file " + Constants.WEB_CONFIG_XML + " was not found in WEB-INF resources folder!"); } String contextConfigLocation = "com.jsmartframework.web.manager"; if (CONFIG.getContent().getPackageScan() != null) { contextConfigLocation += "," + CONFIG.getContent().getPackageScan(); } // Configure necessary parameters in the ServletContext to set Spring configuration without needing an XML file AnnotationConfigWebApplicationContext configWebAppContext = new AnnotationConfigWebApplicationContext(); configWebAppContext.setConfigLocation(contextConfigLocation); CONTEXT_LOADER = new ContextLoader(configWebAppContext); CONTEXT_LOADER.initWebApplicationContext(servletContext); TagEncrypter.init(); TEXTS.init(); IMAGES.init(servletContext); HANDLER.init(servletContext); // ServletControl -> @MultipartConfig @WebServlet(name = "ServletControl", displayName = "ServletControl", loadOnStartup = 1) Servlet servletControl = servletContext.createServlet( (Class<? extends Servlet>) Class.forName("com.jsmartframework.web.manager.ServletControl")); ServletRegistration.Dynamic servletControlReg = (ServletRegistration.Dynamic) servletContext .addServlet("ServletControl", servletControl); servletControlReg.setAsyncSupported(true); servletControlReg.setLoadOnStartup(1); // ServletControl Initial Parameters InitParam[] initParams = CONFIG.getContent().getInitParams(); if (initParams != null) { for (InitParam initParam : initParams) { servletControlReg.setInitParameter(initParam.getName(), initParam.getValue()); } } // MultiPart to allow file upload on ServletControl MultipartConfigElement multipartElement = getServletMultipartElement(); if (multipartElement != null) { servletControlReg.setMultipartConfig(multipartElement); } // Security constraint to ServletControl ServletSecurityElement servletSecurityElement = getServletSecurityElement(servletContext); if (servletSecurityElement != null) { servletControlReg.setServletSecurity(servletSecurityElement); } // TODO: Fix problem related to authentication by container to use SSL dynamically (Maybe create more than one servlet for secure and non-secure patterns) // Check also the use of request.login(user, pswd) // Check the HttpServletRequest.BASIC_AUTH, CLIENT_CERT_AUTH, FORM_AUTH, DIGEST_AUTH // servletReg.setRunAsRole("admin"); // servletContext.declareRoles("admin"); // ServletControl URL mapping String[] servletMapping = getServletMapping(); servletControlReg.addMapping(servletMapping); // ErrorFilter -> @WebFilter(urlPatterns = {"/*"}) Filter errorFilter = servletContext.createFilter( (Class<? extends Filter>) Class.forName("com.jsmartframework.web.filter.ErrorFilter")); FilterRegistration.Dynamic errorFilterReg = (FilterRegistration.Dynamic) servletContext .addFilter("ErrorFilter", errorFilter); errorFilterReg.setAsyncSupported(true); errorFilterReg.addMappingForUrlPatterns( EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.ERROR), true, "/*"); // EncodeFilter -> @WebFilter(urlPatterns = {"/*"}) Filter encodeFilter = servletContext.createFilter( (Class<? extends Filter>) Class.forName("com.jsmartframework.web.filter.EncodeFilter")); FilterRegistration.Dynamic encodeFilterReg = (FilterRegistration.Dynamic) servletContext .addFilter("EncodeFilter", encodeFilter); encodeFilterReg.setAsyncSupported(true); encodeFilterReg.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST, DispatcherType.ERROR), true, "/*"); // CacheFilter -> @WebFilter(urlPatterns = {"/*"}) Filter cacheFilter = servletContext.createFilter( (Class<? extends Filter>) Class.forName("com.jsmartframework.web.filter.CacheFilter")); FilterRegistration.Dynamic cacheFilterReg = (FilterRegistration.Dynamic) servletContext .addFilter("CacheFilter", cacheFilter); cacheFilterReg.setAsyncSupported(true); cacheFilterReg.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST, DispatcherType.ERROR), true, "/*"); // Add custom filters defined by client for (String filterName : sortCustomFilters()) { Filter customFilter = servletContext .createFilter((Class<? extends Filter>) HANDLER.webFilters.get(filterName)); HANDLER.executeInjection(customFilter); WebFilter webFilter = customFilter.getClass().getAnnotation(WebFilter.class); FilterRegistration.Dynamic customFilterReg = (FilterRegistration.Dynamic) servletContext .addFilter(filterName, customFilter); if (webFilter.initParams() != null) { for (WebInitParam initParam : webFilter.initParams()) { customFilterReg.setInitParameter(initParam.name(), initParam.value()); } } customFilterReg.setAsyncSupported(webFilter.asyncSupported()); customFilterReg.addMappingForUrlPatterns(EnumSet.copyOf(Arrays.asList(webFilter.dispatcherTypes())), true, webFilter.urlPatterns()); } // FilterControl -> @WebFilter(servletNames = {"ServletControl"}) Filter filterControl = servletContext.createFilter( (Class<? extends Filter>) Class.forName("com.jsmartframework.web.manager.FilterControl")); FilterRegistration.Dynamic filterControlReg = (FilterRegistration.Dynamic) servletContext .addFilter("FilterControl", filterControl); filterControlReg.setAsyncSupported(true); filterControlReg.addMappingForServletNames(EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.ERROR, DispatcherType.INCLUDE), true, "ServletControl"); // OutputFilter -> @WebFilter(servletNames = {"ServletControl"}) Filter outputFilter = servletContext.createFilter( (Class<? extends Filter>) Class.forName("com.jsmartframework.web.manager.OutputFilter")); FilterRegistration.Dynamic outputFilterReg = (FilterRegistration.Dynamic) servletContext .addFilter("OutputFilter", outputFilter); outputFilterReg.setAsyncSupported(true); outputFilterReg.addMappingForServletNames(EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.ERROR, DispatcherType.INCLUDE), true, "ServletControl"); // AsyncFilter -> @WebFilter(servletNames = {"ServletControl"}) // Filter used case AsyncContext is dispatched internally by AsyncBean implementation Filter asyncFilter = servletContext.createFilter( (Class<? extends Filter>) Class.forName("com.jsmartframework.web.manager.AsyncFilter")); FilterRegistration.Dynamic asyncFilterReg = (FilterRegistration.Dynamic) servletContext .addFilter("AsyncFilter", asyncFilter); asyncFilterReg.setAsyncSupported(true); asyncFilterReg.addMappingForServletNames(EnumSet.of(DispatcherType.ASYNC), true, "ServletControl"); // SessionControl -> @WebListener EventListener sessionListener = servletContext.createListener((Class<? extends EventListener>) Class .forName("com.jsmartframework.web.manager.SessionControl")); servletContext.addListener(sessionListener); // RequestControl -> @WebListener EventListener requestListener = servletContext.createListener((Class<? extends EventListener>) Class .forName("com.jsmartframework.web.manager.RequestControl")); servletContext.addListener(requestListener); // Custom WebServlet -> Custom Servlets created by application for (String servletName : HANDLER.webServlets.keySet()) { Servlet customServlet = servletContext .createServlet((Class<? extends Servlet>) HANDLER.webServlets.get(servletName)); HANDLER.executeInjection(customServlet); WebServlet webServlet = customServlet.getClass().getAnnotation(WebServlet.class); ServletRegistration.Dynamic customReg = (ServletRegistration.Dynamic) servletContext .addServlet(servletName, customServlet); customReg.setLoadOnStartup(webServlet.loadOnStartup()); customReg.setAsyncSupported(webServlet.asyncSupported()); WebInitParam[] customInitParams = webServlet.initParams(); if (customInitParams != null) { for (WebInitParam customInitParam : customInitParams) { customReg.setInitParameter(customInitParam.name(), customInitParam.value()); } } // Add mapping url for custom servlet customReg.addMapping(webServlet.urlPatterns()); if (customServlet.getClass().isAnnotationPresent(MultipartConfig.class)) { customReg.setMultipartConfig(new MultipartConfigElement( customServlet.getClass().getAnnotation(MultipartConfig.class))); } } // Controller Dispatcher for Spring MVC Set<String> requestPaths = HANDLER.requestPaths.keySet(); if (!requestPaths.isEmpty()) { ServletRegistration.Dynamic mvcDispatcherReg = servletContext.addServlet("DispatcherServlet", new DispatcherServlet(configWebAppContext)); mvcDispatcherReg.setLoadOnStartup(1); mvcDispatcherReg.addMapping(requestPaths.toArray(new String[requestPaths.size()])); // RequestPathFilter -> @WebFilter(servletNames = {"DispatcherServlet"}) Filter requestPathFilter = servletContext.createFilter((Class<? extends Filter>) Class .forName("com.jsmartframework.web.manager.RequestPathFilter")); FilterRegistration.Dynamic reqPathFilterReg = (FilterRegistration.Dynamic) servletContext .addFilter("RequestPathFilter", requestPathFilter); reqPathFilterReg.addMappingForServletNames(EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.ERROR, DispatcherType.INCLUDE, DispatcherType.ASYNC), true, "DispatcherServlet"); } } catch (Exception ex) { throw new RuntimeException(ex); } }