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.apache.commons.logging.Log;
021 import org.apache.commons.logging.LogFactory;
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 Log LOG = LogFactory.getLog(NonFacesRequestServlet.class);
043
044 protected void service(HttpServletRequest request,
045 HttpServletResponse response) throws ServletException,
046 IOException {
047
048 LifecycleFactory lFactory = (LifecycleFactory)
049 FactoryFinder.getFactory(FactoryFinder.LIFECYCLE_FACTORY);
050 Lifecycle lifecycle =
051 lFactory.getLifecycle(LifecycleFactory.DEFAULT_LIFECYCLE);
052 FacesContextFactory fcFactory = (FacesContextFactory)
053 FactoryFinder.getFactory(FactoryFinder.FACES_CONTEXT_FACTORY);
054 FacesContext facesContext =
055 fcFactory.getFacesContext(getServletContext(), request, response, lifecycle);
056 try {
057 Application application = facesContext.getApplication();
058 ViewHandler viewHandler = application.getViewHandler();
059 String viewId = getFromViewId();
060 UIViewRoot view = viewHandler.createView(facesContext, viewId);
061 facesContext.setViewRoot(view);
062
063 // ExternalContext externalContext = facesContext.getExternalContext();
064 // externalContext.getRequestMap().put("com.sun.faces.INVOCATION_PATH", "/faces");
065
066 // invoke application
067 String outcome = invokeApplication(facesContext);
068
069 if (facesContext.getResponseComplete()) {
070 return;
071 }
072 if (LOG.isDebugEnabled()) {
073 LOG.debug("outcome = '" + outcome + "'");
074 }
075 NavigationHandler navigationHandler = application.getNavigationHandler();
076 navigationHandler.handleNavigation(facesContext, null, outcome);
077 lifecycle.render(facesContext);
078 } finally {
079 facesContext.release();
080 }
081 }
082
083 public abstract String invokeApplication(FacesContext facesContext);
084
085 /**
086 * will be called to initilize the first ViewRoot,
087 * may be overwritten by extended classes
088 */
089 public String getFromViewId() {
090 return "";
091 }
092 }