/* * Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package javax.management;/** * Represents a notification emitted by the MBean Server through the MBeanServerDelegate MBean. * The MBean Server emits the following types of notifications: MBean registration, MBean * unregistration. * <P> * To receive MBeanServerNotifications, you need to register a listener with * the {@link MBeanServerDelegate MBeanServerDelegate} MBean * that represents the MBeanServer. The ObjectName of the MBeanServerDelegate is * {@link MBeanServerDelegate#DELEGATE_NAME}, which is * <CODE>JMImplementation:type=MBeanServerDelegate</CODE>. * * <p>The following code prints a message every time an MBean is registered * or unregistered in the MBean Server {@code mbeanServer}:</p> * * <pre> * private static final NotificationListener printListener = new NotificationListener() { * public void handleNotification(Notification n, Object handback) { * if (!(n instanceof MBeanServerNotification)) { * System.out.println("Ignored notification of class " + n.getClass().getName()); * return; * } * MBeanServerNotification mbsn = (MBeanServerNotification) n; * String what; * if (n.getType().equals(MBeanServerNotification.REGISTRATION_NOTIFICATION)) * what = "MBean registered"; * else if (n.getType().equals(MBeanServerNotification.UNREGISTRATION_NOTIFICATION)) * what = "MBean unregistered"; * else * what = "Unknown type " + n.getType(); * System.out.println("Received MBean Server notification: " + what + ": " + * mbsn.getMBeanName()); * } * }; * * ... * mbeanServer.addNotificationListener( * MBeanServerDelegate.DELEGATE_NAME, printListener, null, null); * </pre> * * <p id="group"> * An MBean which is not an {@link MBeanServerDelegate} may also emit * MBeanServerNotifications. In particular, there is a convention for * MBeans to emit an MBeanServerNotification for a group of MBeans.</p> * * <p>An MBeanServerNotification emitted to denote the registration or * unregistration of a group of MBeans has the following characteristics: * <ul><li>Its {@linkplain Notification#getType() notification type} is * {@code "JMX.mbean.registered.group"} or * {@code "JMX.mbean.unregistered.group"}, which can also be written {@link * MBeanServerNotification#REGISTRATION_NOTIFICATION}{@code + ".group"} or * {@link * MBeanServerNotification#UNREGISTRATION_NOTIFICATION}{@code + ".group"}. * </li> * <li>Its {@linkplain #getMBeanName() MBean name} is an ObjectName pattern * that selects the set (or a superset) of the MBeans being registered * or unregistered</li> * <li>Its {@linkplain Notification#getUserData() user data} can optionally * be set to an array of ObjectNames containing the names of all MBeans * being registered or unregistered.</li> * </ul> * </p> * <p> * MBeans which emit these group registration/unregistration notifications will * declare them in their {@link MBeanInfo#getNotifications() * MBeanNotificationInfo}. * </p> * * @since 1.5 */public class MBeanServerNotification extends Notification { /* Serial version */ private static final long serialVersionUID = 2876477500475969677L; /** * Notification type denoting that an MBean has been registered. * Value is "JMX.mbean.registered". */ public static final String REGISTRATION_NOTIFICATION = "JMX.mbean.registered"; /** * Notification type denoting that an MBean has been unregistered. * Value is "JMX.mbean.unregistered". */ public static final String UNREGISTRATION_NOTIFICATION = "JMX.mbean.unregistered"; /** * @serial The object names of the MBeans concerned by this notification */ private final ObjectName objectName; /** * Creates an MBeanServerNotification object specifying object names of * the MBeans that caused the notification and the specified notification * type. * * @param type A string denoting the type of the * notification. Set it to one these values: {@link * #REGISTRATION_NOTIFICATION}, {@link * #UNREGISTRATION_NOTIFICATION}. * @param source The MBeanServerNotification object responsible * for forwarding MBean server notification. * @param sequenceNumber A sequence number that can be used to order * received notifications. * @param objectName The object name of the MBean that caused the * notification. * */ public MBeanServerNotification(String type, Object source, long sequenceNumber, ObjectName objectName) { super(type, source, sequenceNumber); this.objectName = objectName; } /** * Returns the object name of the MBean that caused the notification. * * @return the object name of the MBean that caused the notification. */ public ObjectName getMBeanName() { return objectName; } @Override public String toString() { return super.toString() + "[mbeanName=" + objectName + "]"; } }
/*
* Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.management;
/**
* Represents a notification emitted by the MBean Server through the MBeanServerDelegate MBean.
* The MBean Server emits the following types of notifications: MBean registration, MBean
* unregistration.
* <P>
* To receive MBeanServerNotifications, you need to register a listener with
* the {@link MBeanServerDelegate MBeanServerDelegate} MBean
* that represents the MBeanServer. The ObjectName of the MBeanServerDelegate is
* {@link MBeanServerDelegate#DELEGATE_NAME}, which is
* <CODE>JMImplementation:type=MBeanServerDelegate</CODE>.
*
* <p>The following code prints a message every time an MBean is registered
* or unregistered in the MBean Server {@code mbeanServer}:</p>
*
* <pre>
* private static final NotificationListener printListener = new NotificationListener() {
* public void handleNotification(Notification n, Object handback) {
* if (!(n instanceof MBeanServerNotification)) {
* System.out.println("Ignored notification of class " + n.getClass().getName());
* return;
* }
* MBeanServerNotification mbsn = (MBeanServerNotification) n;
* String what;
* if (n.getType().equals(MBeanServerNotification.REGISTRATION_NOTIFICATION))
* what = "MBean registered";
* else if (n.getType().equals(MBeanServerNotification.UNREGISTRATION_NOTIFICATION))
* what = "MBean unregistered";
* else
* what = "Unknown type " + n.getType();
* System.out.println("Received MBean Server notification: " + what + ": " +
* mbsn.getMBeanName());
* }
* };
*
* ...
* mbeanServer.addNotificationListener(
* MBeanServerDelegate.DELEGATE_NAME, printListener, null, null);
* </pre>
*
* <p id="group">
* An MBean which is not an {@link MBeanServerDelegate} may also emit
* MBeanServerNotifications. In particular, there is a convention for
* MBeans to emit an MBeanServerNotification for a group of MBeans.</p>
*
* <p>An MBeanServerNotification emitted to denote the registration or
* unregistration of a group of MBeans has the following characteristics:
* <ul><li>Its {@linkplain Notification#getType() notification type} is
* {@code "JMX.mbean.registered.group"} or
* {@code "JMX.mbean.unregistered.group"}, which can also be written {@link
* MBeanServerNotification#REGISTRATION_NOTIFICATION}{@code + ".group"} or
* {@link
* MBeanServerNotification#UNREGISTRATION_NOTIFICATION}{@code + ".group"}.
* </li>
* <li>Its {@linkplain #getMBeanName() MBean name} is an ObjectName pattern
* that selects the set (or a superset) of the MBeans being registered
* or unregistered</li>
* <li>Its {@linkplain Notification#getUserData() user data} can optionally
* be set to an array of ObjectNames containing the names of all MBeans
* being registered or unregistered.</li>
* </ul>
* </p>
* <p>
* MBeans which emit these group registration/unregistration notifications will
* declare them in their {@link MBeanInfo#getNotifications()
* MBeanNotificationInfo}.
* </p>
*
* @since 1.5
*/
public class MBeanServerNotification extends Notification {
/* Serial version */
private static final long serialVersionUID = 2876477500475969677L;
/**
* Notification type denoting that an MBean has been registered.
* Value is "JMX.mbean.registered".
*/
public static final String REGISTRATION_NOTIFICATION =
"JMX.mbean.registered";
/**
* Notification type denoting that an MBean has been unregistered.
* Value is "JMX.mbean.unregistered".
*/
public static final String UNREGISTRATION_NOTIFICATION =
"JMX.mbean.unregistered";
/**
* @serial The object names of the MBeans concerned by this notification
*/
private final ObjectName objectName;
/**
* Creates an MBeanServerNotification object specifying object names of
* the MBeans that caused the notification and the specified notification
* type.
*
* @param type A string denoting the type of the
* notification. Set it to one these values: {@link
* #REGISTRATION_NOTIFICATION}, {@link
* #UNREGISTRATION_NOTIFICATION}.
* @param source The MBeanServerNotification object responsible
* for forwarding MBean server notification.
* @param sequenceNumber A sequence number that can be used to order
* received notifications.
* @param objectName The object name of the MBean that caused the
* notification.
*
*/
public MBeanServerNotification(String type, Object source,
long sequenceNumber, ObjectName objectName) {
super(type, source, sequenceNumber);
this.objectName = objectName;
}
/**
* Returns the object name of the MBean that caused the notification.
*
* @return the object name of the MBean that caused the notification.
*/
public ObjectName getMBeanName() {
return objectName;
}
@Override
public String toString() {
return super.toString() + "[mbeanName=" + objectName + "]";
}
}