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Java > Open Source Codes > org > mortbay > j2ee > session > ActivationInterceptor


1 // ========================================================================
2 // $Id: ActivationInterceptor.java,v 1.4 2004/05/09 20:30:47 gregwilkins Exp $
3 // Copyright 2002-2004 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 // ========================================================================
15
16 package org.mortbay.j2ee.session;
17
18 //----------------------------------------
19
20 import java.rmi.RemoteException JavaDoc;
21
22 import javax.servlet.http.HttpSessionActivationListener JavaDoc;
23 import javax.servlet.http.HttpSessionEvent JavaDoc;
24
25 import org.jfox.ioc.logger.Logger;
26
27 //----------------------------------------
28
29 public class ActivationInterceptor
30   extends StateInterceptor
31 {
32   protected static final Logger _log=Logger.getLogger(ActivationInterceptor.class);
33   protected final HttpSessionEvent JavaDoc _event;
34
35   public
36     ActivationInterceptor()
37   {
38     _event=new HttpSessionEvent JavaDoc(getSession()); // cache an event ready for use...
39 }
40
41   public Object JavaDoc
42     getAttribute(String JavaDoc name)
43     throws IllegalArgumentException JavaDoc, RemoteException JavaDoc
44   {
45     try
46     {
47       Object JavaDoc tmp=super.getAttribute(name);
48       if (tmp!=null && tmp instanceof HttpSessionActivationListener JavaDoc)
49     ((HttpSessionActivationListener JavaDoc)tmp).sessionDidActivate(_event);
50
51       return tmp;
52     }
53     catch (Exception JavaDoc e)
54     {
55       _log.error("could not get Attribute: "+name, e);
56       throw new IllegalArgumentException JavaDoc("could not get Attribute");
57     }
58   }
59
60   public Object JavaDoc
61     setAttribute(String JavaDoc name, Object JavaDoc value, boolean returnValue)
62     throws IllegalArgumentException JavaDoc
63   {
64     try
65     {
66       Object JavaDoc tmp=value;
67       if (tmp!=null && tmp instanceof HttpSessionActivationListener JavaDoc)
68     ((HttpSessionActivationListener JavaDoc)tmp).sessionWillPassivate(_event);
69
70       tmp=super.setAttribute(name, tmp, returnValue);
71
72       if (tmp!=null && tmp instanceof HttpSessionActivationListener JavaDoc)
73     ((HttpSessionActivationListener JavaDoc)tmp).sessionDidActivate(_event);
74
75       return tmp;
76     }
77     catch (Exception JavaDoc e)
78     {
79       _log.error("could not set Attribute: "+name+":"+value, e);
80       throw new IllegalArgumentException JavaDoc("could not set Attribute");
81     }
82   }
83
84   // should an attribute be activated before it is removed ? How do we deal with the bind/unbind events... - TODO
85 public Object JavaDoc
86     removeAttribute(String JavaDoc name, boolean returnValue)
87     throws IllegalArgumentException JavaDoc
88   {
89     try
90     {
91       Object JavaDoc tmp=super.removeAttribute(name, returnValue);
92
93       if (tmp!=null && tmp instanceof HttpSessionActivationListener JavaDoc)
94     ((HttpSessionActivationListener JavaDoc)tmp).sessionDidActivate(_event);
95
96       return tmp;
97     }
98     catch (Exception JavaDoc e)
99     {
100       _log.error("could not remove Attribute: "+name, e);
101       throw new IllegalArgumentException JavaDoc("could not remove Attribute");
102     }
103   }
104
105   // public Object clone() { return null; } // Stateful
106 }
107
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