ServletContextListener


1   /*
2   * Licensed to the Apache Software Foundation (ASF) under one or more
3   * contributor license agreements.  See the NOTICE file distributed with
4   * this work for additional information regarding copyright ownership.
5   * The ASF licenses this file to You under the Apache License, Version 2.0
6   * (the "License"); you may not use this file except in compliance with
7   * the License.  You may obtain a copy of the License at
8   *
9   *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17  package javax.servlet;
18  
19  import java.util.EventListener  ;
20  
21      /** 
22       * Implementations of this interface receive notifications about
23       * changes to the servlet context of the web application they are
24       * part of.
25       * To receive notification events, the implementation class
26       * must be configured in the deployment descriptor for the web
27       * application.
28       * @see ServletContextEvent
29       * @since   v 2.3
30       */
31  
32  public interface ServletContextListener extends EventListener   {
33      /**
34       ** Notification that the web application initialization
35       ** process is starting.
36       ** All ServletContextListeners are notified of context
37       ** initialization before any filter or servlet in the web
38       ** application is initialized.
39       */
40  
41      public void contextInitialized ( ServletContextEvent   sce );
42  
43      /**
44       ** Notification that the servlet context is about to be shut down.
45       ** All servlets and filters have been destroy()ed before any
46       ** ServletContextListeners are notified of context
47       ** destruction.
48       */
49      public void contextDestroyed ( ServletContextEvent   sce );
50  }
51  
52
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