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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.tobago.webapp;
21  
22  import org.apache.myfaces.tobago.portlet.PortletUtils;
23  import org.slf4j.Logger;
24  import org.slf4j.LoggerFactory;
25  
26  import javax.faces.FacesException;
27  import javax.faces.context.ExternalContext;
28  import javax.faces.context.FacesContext;
29  import javax.faces.event.AbortProcessingException;
30  import javax.faces.event.ActionEvent;
31  import javax.faces.event.ActionListener;
32  import javax.portlet.PortletSession;
33  import javax.servlet.http.HttpSession;
34  import java.io.IOException;
35  
36  public class LogoutActionListener implements ActionListener {
37  
38    private static final Logger LOG = LoggerFactory.getLogger(LogoutActionListener.class);
39  
40    public void processAction(ActionEvent event) throws AbortProcessingException {
41      FacesContext facesContext = FacesContext.getCurrentInstance();
42      ExternalContext externalContext = facesContext.getExternalContext();
43      Object session = externalContext.getSession(false);
44      if (session != null) {
45        if (session instanceof HttpSession) {
46          ((HttpSession) session).invalidate();
47        }
48        if (PortletUtils.isPortletApiAvailable() && session instanceof PortletSession) {
49          ((PortletSession) session).invalidate();
50        }
51      }
52      String forward = externalContext.getRequestContextPath() + "/";
53      try {
54        externalContext.redirect(forward);
55      } catch (IOException e) {
56        LOG.error("", e);
57        // TODO: may do error handling
58        throw new FacesException("Can't redirect to '" + forward + "'");
59      }
60      facesContext.responseComplete();
61    }
62  
63  }