1 /*
2 * $Id: AbstractTilesListener.java 952763 2010-06-08 18:28:16Z apetrelli $
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21 package org.apache.tiles.web.startup;
22
23 import javax.servlet.ServletContext;
24 import javax.servlet.ServletContextEvent;
25 import javax.servlet.ServletContextListener;
26
27 import org.apache.tiles.request.servlet.ServletApplicationContext;
28 import org.apache.tiles.startup.TilesInitializer;
29
30 /**
31 * Listener for the initialization of the Tiles container.
32 *
33 * @version $Rev: 952763 $ $Date: 2010-06-09 04:28:16 +1000 (Wed, 09 Jun 2010) $
34 */
35 public abstract class AbstractTilesListener implements ServletContextListener {
36
37 /**
38 * The initializer object.
39 *
40 * @since 2.1.2
41 */
42 protected TilesInitializer initializer;
43
44 /**
45 * Initialize the TilesContainer and place it
46 * into service.
47 *
48 * @param event The intercepted event.
49 */
50 public void contextInitialized(ServletContextEvent event) {
51 ServletContext servletContext = event.getServletContext();
52 initializer = createTilesInitializer();
53 initializer.initialize(new ServletApplicationContext(
54 servletContext));
55 }
56
57 /**
58 * Destroys the initializer.
59 *
60 * @param event The intercepted event.
61 */
62 public void contextDestroyed(ServletContextEvent event) {
63 initializer.destroy();
64 }
65
66 /**
67 * Creates a new instance of {@link TilesInitializer}. Implement it to use a
68 * different initializer.
69 *
70 * @return The Tiles servlet-based initializer.
71 * @since 2.2.0
72 */
73 protected abstract TilesInitializer createTilesInitializer();
74 }