001 /* AttributeChangeNotification.java -- Notification for attribute changes
002 Copyright (C) 2007 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package javax.management;
040
041 /**
042 * Defines the notification used to let listeners know of
043 * an attribute change. The bean itself is responsible
044 * for creating and transmitting the notification when the
045 * attribute changes, by implementing
046 * {@link NotificationBroadcaster}. For example, if a
047 * bean increments the integer, <code>count</code>, it
048 * should send a notification with the
049 * <code>attributeName</code>, <code>"count"</code>,
050 * the <code>attributeType</code>, <code>"Integer"</code>
051 * and the old and new values of the attribute.
052 *
053 * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
054 * @since 1.5
055 */
056 public class AttributeChangeNotification
057 extends Notification
058 {
059
060 /**
061 * Compatible with JDK 1.5
062 */
063 private static final long serialVersionUID = 535176054565814134L;
064
065 /**
066 * The attribute type for attribute change
067 * notifications.
068 */
069 public static final String ATTRIBUTE_CHANGE = "jmx.attribute.change";
070
071 /**
072 * The name of the attribute that changed.
073 */
074 private String attributeName;
075
076 /**
077 * The type of the attribute that changed.
078 */
079 private String attributeType;
080
081 /**
082 * The old value of the attribute.
083 */
084 private Object oldValue;
085
086 /**
087 * The new value of the attribute.
088 */
089 private Object newValue;
090
091 /**
092 * Constructs a new {@link AttributeChangeNotification}
093 * with the specified source, sequence number, timestamp,
094 * message, and the attribute name, type, old value and
095 * new value.
096 *
097 * @param source the producer of the notification, which
098 * is usually the bean that changed the
099 * attribute.
100 * @param sequenceNumber the sequence number of the
101 * notification.
102 * @param timeStamp the date and time of the notification.
103 * @param msg the message content of the notification.
104 * @param name the name of the attribute.
105 * @param type the type of the attribute.
106 * @param oldVal the old value of the attribute.
107 * @param newVal the new value of the attribute.
108 */
109 public AttributeChangeNotification(Object source,
110 long sequenceNumber,
111 long timeStamp,
112 String msg, String name,
113 String type, Object oldVal,
114 Object newVal)
115 {
116 super(ATTRIBUTE_CHANGE, source, sequenceNumber,
117 timeStamp, msg);
118 attributeName = name;
119 attributeType = type;
120 oldValue = oldVal;
121 newValue = newVal;
122 }
123
124 /**
125 * Returns the name of the attribute that changed.
126 *
127 * @return the name of the attribute.
128 */
129 public String getAttributeName()
130 {
131 return attributeName;
132 }
133
134 /**
135 * Returns the type of the attribute that changed.
136 *
137 * @return the type of the attribute.
138 */
139 public String getAttributeType()
140 {
141 return attributeType;
142 }
143
144 /**
145 * Returns the old value of the attribute.
146 *
147 * @return the old value.
148 */
149 public Object getOldValue()
150 {
151 return oldValue;
152 }
153
154 /**
155 * Returns the new value of the attribute.
156 *
157 * @return the new value.
158 */
159 public Object getNewValue()
160 {
161 return newValue;
162 }
163
164 }