1 /***
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Exoffice Technologies. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Exoffice Technologies. Exolab is a registered
23 * trademark of Exoffice Technologies.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2004 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: CallbackServiceImpl.java,v 1.1 2004/11/26 01:51:07 tanderson Exp $
44 */
45 package org.exolab.jms.net;
46
47 import java.util.ArrayList;
48 import java.util.Iterator;
49 import java.util.List;
50
51
52 /***
53 * Service which allows clients to register a callback
54 *
55 * @version $Revision: 1.1 $ $Date: 2004/11/26 01:51:07 $
56 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
57 */
58 public class CallbackServiceImpl implements CallbackService {
59
60 /***
61 * The set of callbacks
62 */
63 private List _callbacks = new ArrayList();
64
65 /***
66 * Register a callback
67 *
68 * @param callback the callback to register
69 */
70 public synchronized void addCallback(Callback callback) {
71 _callbacks.add(callback);
72 }
73
74 /***
75 * De-register a callback
76 *
77 * @param callback the callback to remove
78 */
79 public synchronized void removeCallback(Callback callback) {
80 _callbacks.remove(callback);
81 }
82
83 /***
84 * Returns a list of the registered callbacks
85 *
86 * @return a list of the registered callbacks
87 */
88 public synchronized List getCallbacks() {
89 return _callbacks;
90 }
91
92 /***
93 * Invokes each callback
94 *
95 * @param object the object to pass to the callback
96 */
97 public void invoke(Object object) {
98 Iterator iterator = _callbacks.iterator();
99 while (iterator.hasNext()) {
100 Callback callback = (Callback) iterator.next();
101 callback.invoke(object);
102 }
103 }
104
105 }