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Java > Open Source Codes > org > exolab > jms > net > CallbackServiceImpl


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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 JavaDoc;
48 import java.util.Iterator JavaDoc;
49 import java.util.List JavaDoc;
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 JavaDoc _callbacks = new ArrayList JavaDoc();
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 JavaDoc 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 JavaDoc object) {
98         Iterator JavaDoc iterator = _callbacks.iterator();
99         while (iterator.hasNext()) {
100             Callback callback = (Callback) iterator.next();
101             callback.invoke(object);
102         }
103     }
104
105 }
106
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