001 package org.apache.myfaces.tobago.webapp;
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 import org.apache.myfaces.tobago.config.TobagoConfig;
023
024 import javax.faces.FactoryFinder;
025 import javax.faces.lifecycle.LifecycleFactory;
026 import javax.servlet.ServletContextEvent;
027 import javax.servlet.ServletContextListener;
028 import javax.servlet.ServletException;
029 import javax.servlet.http.HttpServlet;
030
031 /**
032 * Workaround: Weblogic 8.1 calls the ContextListeners after calling
033 * Servlet.init() but, JSF assume it does it before.
034 * Maybe weblogic doesn't call ContextListeners from *.jar!
035 *
036 * @see <a href="http://forum.java.sun.com/thread.jsp?forum=427&thread=499690">
037 * WLS8.1 & JSF 1.0 Final: "Faces Servlet" failed to preload</a>
038 */
039 public class WeblogicWorkaroundServlet extends HttpServlet {
040
041 private static final long serialVersionUID = -8636608446986072719L;
042
043 private static final Log LOG = LogFactory.getLog(WeblogicWorkaroundServlet.class);
044
045 public void init() throws ServletException {
046 if (LOG.isDebugEnabled()) {
047 LOG.debug("1st");
048 }
049 LifecycleFactory factory = (LifecycleFactory)
050 FactoryFinder.getFactory(FactoryFinder.LIFECYCLE_FACTORY);
051
052 if (factory == null) { // Faces ConfigureListener is not called until now!
053 final String className = "com.sun.faces.config.ConfigureListener";
054 if (LOG.isDebugEnabled()) {
055 LOG.debug("Init of " + className + " by servlet!");
056 }
057 callInit(className);
058 }
059
060 if (LOG.isDebugEnabled()) {
061 LOG.debug("2nd");
062 }
063 TobagoConfig tobagoConfig = (TobagoConfig)
064 getServletContext().getAttribute(TobagoConfig.TOBAGO_CONFIG);
065
066 if (tobagoConfig == null) { // TobagoServletContextListener is not called until now!
067 final String className = TobagoServletContextListener.class.getName();
068 if (LOG.isDebugEnabled()) {
069 LOG.debug("Init of " + className + " by servlet!");
070 }
071 callInit(className);
072 }
073
074 if (LOG.isDebugEnabled()) {
075 LOG.debug("3rd");
076 }
077 }
078
079 private void callInit(String className) {
080 try {
081 Class aClass = Class.forName(className);
082 ServletContextListener listener = (ServletContextListener) aClass.newInstance();
083 listener.contextInitialized(new ServletContextEvent(getServletContext()));
084 } catch (ClassNotFoundException e) {
085 LOG.error("", e);
086 } catch (IllegalAccessException e) {
087 LOG.error("", e);
088 } catch (InstantiationException e) {
089 LOG.error("", e);
090 }
091 }
092 }
093