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.webapp;
021    
022    /*
023     * Created 25.10.2004 17:57:53.
024     * $Id: LogoutActionListener.java 1368577 2012-08-02 16:20:31Z lofwyr $
025     */
026    
027    import org.apache.commons.logging.Log;
028    import org.apache.commons.logging.LogFactory;
029    
030    import javax.faces.FacesException;
031    import javax.faces.context.ExternalContext;
032    import javax.faces.context.FacesContext;
033    import javax.faces.event.AbortProcessingException;
034    import javax.faces.event.ActionEvent;
035    import javax.faces.event.ActionListener;
036    import javax.servlet.http.HttpSession;
037    import java.io.IOException;
038    
039    public class LogoutActionListener implements ActionListener {
040    
041      private static final Log LOG = LogFactory.getLog(LogoutActionListener.class);
042    
043      public void processAction(ActionEvent event) throws AbortProcessingException {
044        FacesContext facesContext = FacesContext.getCurrentInstance();
045        ExternalContext externalContext = facesContext.getExternalContext();
046        Object session = externalContext.getSession(false);
047        if (session != null) {
048          if (session instanceof HttpSession) {
049            ((HttpSession) session).invalidate();
050          }
051          // TODO: PortletRequest ??
052        }
053        String forward = externalContext.getRequestContextPath() + "/";
054        try {
055          externalContext.redirect(forward);
056        } catch (IOException e) {
057          LOG.error("", e);
058          // TODO: may do error handling
059          throw new FacesException("Can't redirect to '" + forward + "'");
060        }
061        facesContext.responseComplete();
062      }
063    
064    }