01: /* ***** BEGIN LICENSE BLOCK *****
02: * Version: MPL 1.1
03: * The contents of this file are subject to the Mozilla Public License Version
04: * 1.1 (the "License"); you may not use this file except in compliance with
05: * the License. You may obtain a copy of the License at
06: * http://www.mozilla.org/MPL/
07: *
08: * Software distributed under the License is distributed on an "AS IS" basis,
09: * 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;
27: import java.io.IOException;
28: import java.util.ArrayList;
29: import java.util.Iterator;
30: import java.util.List;
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 files;
42:
43: private long lastModified;
44:
45: private ArrayList listeners = new ArrayList();
46:
47: public BeanConfigurationWatcher(ConfigurableBean bean) {
48: this .bean = bean;
49: this .lastModified = System.currentTimeMillis();
50: }
51:
52: public void setFiles(List files) {
53: this .files = files;
54: }
55:
56: public void setResources(List resources) {
57: files = new ArrayList();
58: Iterator it = resources.iterator();
59: while (it.hasNext()) {
60: Resource res = (Resource) it.next();
61: try {
62: files.add(res.getFile());
63: } catch (IOException e) {
64: }
65: }
66: }
67:
68: public void addListener(ConfigurationEventListener listener) {
69: listeners.add(listener);
70: }
71:
72: public synchronized void checkForModifications() {
73: if (bean.isReloadable()) {
74: long mtime = 0;
75: Iterator it = files.iterator();
76: while (it.hasNext()) {
77: File file = (File) it.next();
78: mtime = Math.max(mtime, file.lastModified());
79: }
80: if (mtime > lastModified) {
81: lastModified = mtime;
82: bean.configure();
83: it = listeners.iterator();
84: while (it.hasNext()) {
85: ConfigurationEventListener listener = (ConfigurationEventListener) it
86: .next();
87: listener.beanReconfigured(bean);
88: }
89: }
90: }
91: }
92:
93: }
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