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