ModelMBeanNotificationBroadcaster.java

/*
 * Copyright (c) 2000, 2006, 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
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/*
 * @author    IBM Corp.
 *
 * Copyright IBM Corp. 1999-2000.  All rights reserved.
 */

package javax.management.modelmbean;

import javax.management.Attribute;
import javax.management.AttributeChangeNotification;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanException;
import javax.management.Notification;
import javax.management.NotificationBroadcaster;
import javax.management.NotificationListener;
import javax.management.RuntimeOperationsException;

/**
 * This interface must be implemented by the ModelMBeans. An implementation of this interface
 * must be shipped with every JMX Agent.
 * <P>
 * Java resources wishing to be manageable instantiate the ModelMBean using the MBeanServer's
 * createMBean method.  The resource then sets the ModelMBeanInfo (with Descriptors) for the ModelMBean
 * instance. The attributes and operations exposed via the ModelMBeanInfo for the ModelMBean are accessible
 * from MBeans, connectors/adaptors like other MBeans. Through the ModelMBeanInfo Descriptors, values and methods in
 * the managed application can be defined and mapped to attributes and operations of the ModelMBean.
 * This mapping can be defined during development in an XML formatted file or dynamically and
 * programmatically at runtime.
 * <P>
 * Every ModelMBean which is instantiated in the MBeanServer becomes manageable:
 * its attributes and operations
 * become remotely accessible through the connectors/adaptors connected to that MBeanServer.
 * A Java object cannot be registered in the MBeanServer unless it is a JMX compliant MBean.
 * By instantiating a ModelMBean, resources are guaranteed that the MBean is valid.
 * <P>
 * MBeanException and RuntimeOperationsException must be thrown on every public method.  This allows
 * for wrapping exceptions from distributed communications (RMI, EJB, etc.).  These exceptions do
 * not have to be thrown by the implementation except in the scenarios described in the specification
 * and javadoc.
 *
 * @since 1.5
 */

public interface ModelMBeanNotificationBroadcaster extends NotificationBroadcaster
{

        /**
         * Sends a Notification which is passed in to the registered
         * Notification listeners on the ModelMBean as a
         * jmx.modelmbean.generic notification.
         *
         * @param ntfyObj The notification which is to be passed to
         * the 'handleNotification' method of the listener object.
         *
         * @exception MBeanException Wraps a distributed communication Exception.
         * @exception RuntimeOperationsException Wraps an IllegalArgumentException:
         *       The Notification object passed in parameter is null.
         *
         */

        public void sendNotification(Notification ntfyObj)
        throws MBeanException, RuntimeOperationsException;

        /**
         * Sends a Notification which contains the text string that is passed in
         * to the registered Notification listeners on the ModelMBean.
         *
         * @param ntfyText The text which is to be passed in the Notification to the 'handleNotification'
         * method of the listener object.
         * the constructed Notification will be:
         *   type        "jmx.modelmbean.generic"
         *   source      this ModelMBean instance
         *   sequence    1
         *
         *
         * @exception MBeanException Wraps a distributed communication Exception.
         * @exception RuntimeOperationsException Wraps an IllegalArgumentException:
         *       The Notification text string passed in parameter is null.
         *
         */
        public void sendNotification(String ntfyText)
        throws MBeanException, RuntimeOperationsException;

        /**
         * Sends an attributeChangeNotification which is passed in to
         * the registered attributeChangeNotification listeners on the
         * ModelMBean.
         *
         * @param notification The notification which is to be passed
         * to the 'handleNotification' method of the listener object.
         *
         * @exception MBeanException Wraps a distributed communication Exception.
         * @exception RuntimeOperationsException Wraps an IllegalArgumentException: The AttributeChangeNotification object passed in parameter is null.
         *
         */
        public void sendAttributeChangeNotification(AttributeChangeNotification notification)
        throws MBeanException, RuntimeOperationsException;


        /**
         * Sends an attributeChangeNotification which contains the old value and new value for the
         * attribute to the registered AttributeChangeNotification listeners on the ModelMBean.
         * <P>
         * @param oldValue The original value for the Attribute
         * @param newValue The current value for the Attribute
         * <PRE>
         * The constructed attributeChangeNotification will be:
         *   type        "jmx.attribute.change"
         *   source      this ModelMBean instance
         *   sequence    1
         *   attributeName oldValue.getName()
         *   attributeType oldValue's class
         *   attributeOldValue oldValue.getValue()
         *   attributeNewValue newValue.getValue()
         * </PRE>
         *
         * @exception MBeanException Wraps a distributed communication Exception.
         * @exception RuntimeOperationsException Wraps an IllegalArgumentException: An Attribute object passed in parameter is null
         * or the names of the two Attribute objects in parameter are not the same.
         */
        public void sendAttributeChangeNotification(Attribute oldValue, Attribute newValue)
        throws MBeanException, RuntimeOperationsException;


        /**
         * Registers an object which implements the NotificationListener interface as a listener.  This
         * object's 'handleNotification()' method will be invoked when any attributeChangeNotification is issued through
         * or by the ModelMBean.  This does not include other Notifications.  They must be registered
         * for independently. An AttributeChangeNotification will be generated for this attributeName.
         *
         * @param listener The listener object which will handles notifications emitted by the registered MBean.
         * @param attributeName The name of the ModelMBean attribute for which to receive change notifications.
         *      If null, then all attribute changes will cause an attributeChangeNotification to be issued.
         * @param handback The context to be sent to the listener with the notification when a notification is emitted.
         *
         * @exception IllegalArgumentException The listener cannot be null.
         * @exception MBeanException Wraps a distributed communication Exception.
         * @exception RuntimeOperationsException Wraps an IllegalArgumentException The attribute name passed in parameter does not exist.
         *
         * @see #removeAttributeChangeNotificationListener
         */
        public void addAttributeChangeNotificationListener(NotificationListener listener,
                                                           String attributeName,
                                                           Object handback)
        throws MBeanException, RuntimeOperationsException, IllegalArgumentException;


        /**
         * Removes a listener for attributeChangeNotifications from the RequiredModelMBean.
         *
         * @param listener The listener name which was handling notifications emitted by the registered MBean.
         * This method will remove all information related to this listener.
         * @param attributeName The attribute for which the listener no longer wants to receive attributeChangeNotifications.
         * If null the listener will be removed for all attributeChangeNotifications.
         *
         * @exception ListenerNotFoundException The listener is not registered in the MBean or is null.
         * @exception MBeanException Wraps a distributed communication Exception.
         * @exception RuntimeOperationsException Wraps an IllegalArgumentException If the inAttributeName parameter does not
         * correspond to an attribute name.
         *
         * @see #addAttributeChangeNotificationListener
         */

        public void removeAttributeChangeNotificationListener(NotificationListener listener,
                                                              String attributeName)
        throws MBeanException, RuntimeOperationsException, ListenerNotFoundException;

}