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Java > Open Source Codes > org > apache > tester > ContextListener01


1 /*
2  * Copyright 1999, 2000, 2001 ,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.tester;
18
19
20 import java.io.*;
21 import javax.servlet.*;
22 import javax.servlet.http.*;
23
24 /**
25  * Application event listener for context events. All events that occur
26  * are logged appropriately to the static logger..
27  *
28  * @author Craig R. McClanahan
29  * @version $Revision: 1.2 $ $Date: 2004/02/27 14:58:56 $
30  */
31
32 public class ContextListener01
33     implements ServletContextAttributeListener, ServletContextListener {
34
35
36     public void attributeAdded(ServletContextAttributeEvent event) {
37         StaticLogger.write("ContextListener01: attributeAdded(" +
38                            event.getName() + "," + event.getValue() + ")");
39         ServletContext context = (ServletContext) event.getSource();
40         context.log("ContextListener01: attributeAdded(" +
41                     event.getName() + "," + event.getValue() + ")");
42         if (event.getValue() instanceof ContextBean) {
43             ContextBean bean = (ContextBean) event.getValue();
44             bean.setLifecycle(bean.getLifecycle() + "/add");
45         }
46     }
47
48     public void attributeRemoved(ServletContextAttributeEvent event) {
49         StaticLogger.write("ContextListener01: attributeRemoved(" +
50                            event.getName() + "," + event.getValue() + ")");
51         ServletContext context = (ServletContext) event.getSource();
52         context.log("ContextListener01: attributeRemoved(" +
53                     event.getName() + "," + event.getValue() + ")");
54         if (event.getValue() instanceof ContextBean) {
55             ContextBean bean = (ContextBean) event.getValue();
56             bean.setLifecycle(bean.getLifecycle() + "/rem");
57         }
58     }
59
60     public void attributeReplaced(ServletContextAttributeEvent event) {
61         StaticLogger.write("ContextListener01: attributeReplaced(" +
62                            event.getName() + "," + event.getValue() + ")");
63         ServletContext context = (ServletContext) event.getSource();
64         context.log("ContextListener01: attributeReplaced(" +
65                     event.getName() + "," + event.getValue() + ")");
66         if (event.getValue() instanceof ContextBean) {
67             ContextBean bean = (ContextBean) event.getValue();
68             bean.setLifecycle(bean.getLifecycle() + "/rep");
69         }
70     }
71
72     public void contextDestroyed(ServletContextEvent event) {
73         StaticLogger.write("ContextListener01: contextDestroyed()");
74         ServletContext context = (ServletContext) event.getSource();
75         context.log("ContextListener01: contextDestroyed()");
76         context.removeAttribute("contextListener01");
77     }
78
79     public void contextInitialized(ServletContextEvent event) {
80         StaticLogger.write("ContextListener01: contextInitialized()");
81         ServletContext context = (ServletContext) event.getSource();
82         context.log("ContextListener01: contextInitialized()");
83         ContextBean bean = new ContextBean();
84         bean.setStringProperty("ContextListener01");
85         context.setAttribute("contextListener01", bean);
86     }
87
88
89 }
90
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