001 package org.apache.myfaces.tobago.servlet; 002 003 /* 004 * Licensed to the Apache Software Foundation (ASF) under one or more 005 * contributor license agreements. See the NOTICE file distributed with 006 * this work for additional information regarding copyright ownership. 007 * The ASF licenses this file to You under the Apache License, Version 2.0 008 * (the "License"); you may not use this file except in compliance with 009 * the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, software 014 * distributed under the License is distributed on an "AS IS" BASIS, 015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 016 * See the License for the specific language governing permissions and 017 * limitations under the License. 018 */ 019 020 import org.slf4j.Logger; 021 import org.slf4j.LoggerFactory; 022 023 import javax.faces.FactoryFinder; 024 import javax.faces.application.Application; 025 import javax.faces.application.NavigationHandler; 026 import javax.faces.application.ViewHandler; 027 import javax.faces.component.UIViewRoot; 028 import javax.faces.context.FacesContext; 029 import javax.faces.context.FacesContextFactory; 030 import javax.faces.lifecycle.Lifecycle; 031 import javax.faces.lifecycle.LifecycleFactory; 032 import javax.servlet.ServletException; 033 import javax.servlet.http.HttpServlet; 034 import javax.servlet.http.HttpServletRequest; 035 import javax.servlet.http.HttpServletResponse; 036 import java.io.IOException; 037 038 public abstract class NonFacesRequestServlet extends HttpServlet { 039 040 private static final long serialVersionUID = -7448621953821447997L; 041 042 private static final Logger LOG = LoggerFactory.getLogger(NonFacesRequestServlet.class); 043 044 @Override 045 protected void service(HttpServletRequest request, HttpServletResponse response) 046 throws ServletException, IOException { 047 048 LifecycleFactory lFactory = (LifecycleFactory) FactoryFinder.getFactory(FactoryFinder.LIFECYCLE_FACTORY); 049 Lifecycle lifecycle = lFactory.getLifecycle(LifecycleFactory.DEFAULT_LIFECYCLE); 050 FacesContextFactory fcFactory = (FacesContextFactory) FactoryFinder.getFactory(FactoryFinder.FACES_CONTEXT_FACTORY); 051 FacesContext facesContext = fcFactory.getFacesContext(getServletContext(), request, response, lifecycle); 052 try { 053 054 // invoke application 055 String outcome = invokeApplication(facesContext); 056 057 if (facesContext.getResponseComplete()) { 058 return; 059 } 060 if (LOG.isDebugEnabled()) { 061 LOG.debug("outcome = '" + outcome + "'"); 062 } 063 064 Application application = facesContext.getApplication(); 065 if (facesContext.getViewRoot() == null) { 066 ViewHandler viewHandler = application.getViewHandler(); 067 String viewId = getFromViewId(); 068 UIViewRoot view = viewHandler.createView(facesContext, viewId); 069 facesContext.setViewRoot(view); 070 } 071 072 NavigationHandler navigationHandler = application.getNavigationHandler(); 073 navigationHandler.handleNavigation(facesContext, null, outcome); 074 075 076 lifecycle.render(facesContext); 077 } finally { 078 facesContext.release(); 079 } 080 } 081 082 public abstract String invokeApplication(FacesContext facesContext); 083 084 /** 085 * will be called to initialize the first ViewRoot, 086 * may be overwritten by extended classes 087 */ 088 public String getFromViewId() { 089 return ""; 090 } 091 }