KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > jcorporate > expresso > core > misc > SysEventHub


1 /* ====================================================================
2  * The Jcorporate Apache Style Software License, Version 1.2 05-07-2002
3  *
4  * Copyright (c) 1995-2002 Jcorporate Ltd. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in
15  * the documentation and/or other materials provided with the
16  * distribution.
17  *
18  * 3. The end-user documentation included with the redistribution,
19  * if any, must include the following acknowledgment:
20  * "This product includes software developed by Jcorporate Ltd.
21  * (http://www.jcorporate.com/)."
22  * Alternately, this acknowledgment may appear in the software itself,
23  * if and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. "Jcorporate" and product names such as "Expresso" must
26  * not be used to endorse or promote products derived from this
27  * software without prior written permission. For written permission,
28  * please contact info@jcorporate.com.
29  *
30  * 5. Products derived from this software may not be called "Expresso",
31  * or other Jcorporate product names; nor may "Expresso" or other
32  * Jcorporate product names appear in their name, without prior
33  * written permission of Jcorporate Ltd.
34  *
35  * 6. No product derived from this software may compete in the same
36  * market space, i.e. framework, without prior written permission
37  * of Jcorporate Ltd. For written permission, please contact
38  * partners@jcorporate.com.
39  *
40  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
41  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
42  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
43  * DISCLAIMED. IN NO EVENT SHALL JCORPORATE LTD OR ITS CONTRIBUTORS
44  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
45  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
46  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
47  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
48  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
49  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
50  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * ====================================================================
53  *
54  * This software consists of voluntary contributions made by many
55  * individuals on behalf of the Jcorporate Ltd. Contributions back
56  * to the project(s) are encouraged when you make modifications.
57  * Please send them to support@jcorporate.com. For more information
58  * on Jcorporate Ltd. and its products, please see
59  * <http://www.jcorporate.com/>.
60  *
61  * Portions of this software are based upon other open source
62  * products and are subject to their respective licenses.
63  */

64
65 package com.jcorporate.expresso.core.misc;
66
67 import org.apache.log4j.Logger;
68
69
70 public class SysEventHub {
71     public static SysEventHubImpl myImpl = null;
72     private static Logger log = Logger.getLogger(SysEventHub.class);
73
74     private static SysEventHubImpl getImpl() {
75         if (myImpl == null) {
76             String JavaDoc className = ConfigManager.getClassHandler("sysEventHub");
77
78             if (className == null || className.length() < 0) {
79                 log.warn("Unable to get 'sysEventHub' class handler. Using default");
80                 className = "com.jcorporate.expresso.core.misc.DefaultSysEventHubImpl";
81             } else {
82                 try {
83                     myImpl = (SysEventHubImpl) Class.forName(className).newInstance();
84                 } catch (Exception JavaDoc e) {
85                     log.error("Error loading sys event hub " + className, e);
86                 }
87             }
88         }
89
90         return myImpl;
91     }
92
93     public static void addListener(SysEventListener listener,
94                                    String JavaDoc newTriggeringClass, String JavaDoc newCode) {
95         getImpl().addListener(listener, newTriggeringClass, newCode);
96     } /* addListener */
97
98
99     public static void trigger(SysEvent theEvent) {
100         getImpl().trigger(theEvent);
101     }
102
103     public static void removeListener(SysEventListener listener,
104                                       String JavaDoc newTriggeringClass,
105                                       String JavaDoc newCode) {
106         getImpl().removeListener(listener, newTriggeringClass, newCode);
107     }
108
109 }
Popular Tags