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Java > Open Source Codes > org > riotfamily > common > xml > BeanConfigurationWatcher


1 /* ***** BEGIN LICENSE BLOCK *****
2  * Version: MPL 1.1
3  * The contents of this file are subject to the Mozilla Public License Version
4  * 1.1 (the "License"); you may not use this file except in compliance with
5  * the License. You may obtain a copy of the License at
6  * http://www.mozilla.org/MPL/
7  *
8  * Software distributed under the License is distributed on an "AS IS" basis,
9  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
10  * for the specific language governing rights and limitations under the
11  * License.
12  *
13  * The Original Code is Riot.
14  *
15  * The Initial Developer of the Original Code is
16  * Neteye GmbH.
17  * Portions created by the Initial Developer are Copyright (C) 2006
18  * the Initial Developer. All Rights Reserved.
19  *
20  * Contributor(s):
21  * Felix Gnass [fgnass at neteye dot de]
22  *
23  * ***** END LICENSE BLOCK ***** */
24 package org.riotfamily.common.xml;
25
26 import java.io.File JavaDoc;
27 import java.io.IOException JavaDoc;
28 import java.util.ArrayList JavaDoc;
29 import java.util.Iterator JavaDoc;
30 import java.util.List JavaDoc;
31
32 import org.springframework.core.io.Resource;
33
34 /**
35  *
36  */
37 public class BeanConfigurationWatcher {
38
39     private ConfigurableBean bean;
40     
41     private List JavaDoc files;
42     
43     private long lastModified;
44     
45     private ArrayList JavaDoc listeners = new ArrayList JavaDoc();
46     
47     public BeanConfigurationWatcher(ConfigurableBean bean) {
48         this.bean = bean;
49         this.lastModified = System.currentTimeMillis();
50     }
51
52     public void setFiles(List JavaDoc files) {
53         this.files = files;
54     }
55
56     public void setResources(List JavaDoc resources) {
57         files = new ArrayList JavaDoc();
58         Iterator JavaDoc it = resources.iterator();
59         while (it.hasNext()) {
60             Resource res = (Resource) it.next();
61             try {
62                 files.add(res.getFile());
63             }
64             catch (IOException JavaDoc e) {
65             }
66         }
67     }
68
69     public void addListener(ConfigurationEventListener listener) {
70         listeners.add(listener);
71     }
72     
73     public synchronized void checkForModifications() {
74         if (bean.isReloadable()) {
75             long mtime = 0;
76             Iterator JavaDoc it = files.iterator();
77             while (it.hasNext()) {
78                 File JavaDoc file = (File JavaDoc) it.next();
79                 mtime = Math.max(mtime, file.lastModified());
80             }
81             if (mtime > lastModified) {
82                 lastModified = System.currentTimeMillis();
83                 bean.configure();
84                 it = listeners.iterator();
85                 while (it.hasNext()) {
86                     ConfigurationEventListener listener = (ConfigurationEventListener) it.next();
87                     listener.beanReconfigured(bean);
88                 }
89             }
90         }
91     }
92     
93 }
94
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