Hibernate example source code file (BaseEmitterBean.java)

This example Hibernate source code file (BaseEmitterBean.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

atomiclong, baseemitterbean, emitter, emitter, listenernotfoundexception, listenernotfoundexception, management, mbeannotificationinfo, notification, notificationemitter, notificationfilter, notificationfilter, object, object, t, threading, threads, util

The Hibernate BaseEmitterBean.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */

package org.hibernate.cache.ehcache.management.impl;

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicLong;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanNotificationInfo;
import javax.management.NotCompliantMBeanException;
import javax.management.Notification;
import javax.management.NotificationBroadcasterSupport;
import javax.management.NotificationEmitter;
import javax.management.NotificationFilter;
import javax.management.NotificationListener;
import javax.management.StandardMBean;

/**
 * @author gkeim
 */
public abstract class BaseEmitterBean extends StandardMBean implements NotificationEmitter {
	/**
	 * emitter
	 */
	protected final Emitter emitter = new Emitter();

	/**
	 * sequenceNumber
	 */
	protected final AtomicLong sequenceNumber = new AtomicLong();


	private final List<NotificationListener> notificationListeners = new CopyOnWriteArrayList();

	/**
	 * BaseEmitterBean
	 *
	 * @param <T>
	 * @param mbeanInterface
	 *
	 * @throws javax.management.NotCompliantMBeanException
	 */
	protected <T> BaseEmitterBean(Class mbeanInterface) throws NotCompliantMBeanException {
		super( mbeanInterface );
	}

	/**
	 * sendNotification
	 *
	 * @param eventType
	 */
	public void sendNotification(String eventType) {
		sendNotification( eventType, null, null );
	}

	/**
	 * sendNotification
	 *
	 * @param eventType
	 * @param data
	 */
	public void sendNotification(String eventType, Object data) {
		sendNotification( eventType, data, null );
	}

	/**
	 * sendNotification
	 *
	 * @param eventType
	 * @param data
	 * @param msg
	 */
	public void sendNotification(String eventType, Object data, String msg) {
		Notification notif = new Notification(
				eventType,
				this,
				sequenceNumber.incrementAndGet(),
				System.currentTimeMillis(),
				msg
		);
		if ( data != null ) {
			notif.setUserData( data );
		}
		emitter.sendNotification( notif );
	}

	/**
	 * Dispose of this SampledCacheManager and clean up held resources
	 */
	public final void dispose() {
		doDispose();
		removeAllNotificationListeners();
	}

	/**
	 * Dispose callback of subclasses
	 */
	protected abstract void doDispose();

	/**
	 * @author gkeim
	 */
	private class Emitter extends NotificationBroadcasterSupport {
		/**
		 * @see javax.management.NotificationBroadcasterSupport#getNotificationInfo()
		 */
		@Override
		public MBeanNotificationInfo[] getNotificationInfo() {
			return BaseEmitterBean.this.getNotificationInfo();
		}
	}

	/**
	 * @see javax.management.NotificationBroadcaster#addNotificationListener(javax.management.NotificationListener,
	 *	  javax.management.NotificationFilter, java.lang.Object)
	 */
	public void addNotificationListener(NotificationListener notif, NotificationFilter filter, Object callBack) {
		emitter.addNotificationListener( notif, filter, callBack );
		notificationListeners.add( notif );
	}

	/**
	 * remove all added notification listeners
	 */
	private void removeAllNotificationListeners() {
		for ( NotificationListener listener : notificationListeners ) {
			try {
				emitter.removeNotificationListener( listener );
			}
			catch ( ListenerNotFoundException e ) {
				// ignore
			}
		}
		notificationListeners.clear();
	}

	/**
	 * @see javax.management.NotificationBroadcaster#getNotificationInfo()
	 */
	public abstract MBeanNotificationInfo[] getNotificationInfo();


	/**
	 * @see javax.management.NotificationBroadcaster#removeNotificationListener(javax.management.NotificationListener)
	 */
	public void removeNotificationListener(NotificationListener listener) throws ListenerNotFoundException {
		emitter.removeNotificationListener( listener );
		notificationListeners.remove( listener );
	}

	/**
	 * @see javax.management.NotificationEmitter#removeNotificationListener(javax.management.NotificationListener,
	 *	  javax.management.NotificationFilter, java.lang.Object)
	 */
	public void removeNotificationListener(NotificationListener notif, NotificationFilter filter, Object callBack)
			throws ListenerNotFoundException {
		emitter.removeNotificationListener( notif, filter, callBack );
		notificationListeners.remove( notif );
	}
}