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    /*
021     * Created 25.10.2004 17:57:53.
022     * $Id: LogoutActionListener.java 939978 2010-05-01 11:30:00Z bommel $
023     */
024    
025    import org.slf4j.Logger;
026    import org.slf4j.LoggerFactory;
027    
028    import javax.faces.FacesException;
029    import javax.faces.context.ExternalContext;
030    import javax.faces.context.FacesContext;
031    import javax.faces.event.AbortProcessingException;
032    import javax.faces.event.ActionEvent;
033    import javax.faces.event.ActionListener;
034    import javax.servlet.http.HttpSession;
035    import java.io.IOException;
036    
037    public class LogoutActionListener implements ActionListener {
038    
039      private static final Logger LOG = LoggerFactory.getLogger(LogoutActionListener.class);
040    
041      public void processAction(ActionEvent event) throws AbortProcessingException {
042        FacesContext facesContext = FacesContext.getCurrentInstance();
043        ExternalContext externalContext = facesContext.getExternalContext();
044        Object session = externalContext.getSession(false);
045        if (session != null) {
046          if (session instanceof HttpSession) {
047            ((HttpSession) session).invalidate();
048          }
049          // TODO: PortletRequest ??
050        }
051        String forward = externalContext.getRequestContextPath() + "/";
052        try {
053          externalContext.redirect(forward);
054        } catch (IOException e) {
055          LOG.error("", e);
056          // TODO: may do error handling
057          throw new FacesException("Can't redirect to '" + forward + "'");
058        }
059        facesContext.responseComplete();
060      }
061    
062    }