/* * Copyright (c) 2004, 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 sun.jvmstat.monitor.event; import java.util.Set;import sun.jvmstat.monitor.MonitoredHost; /** * Provides a description of a change in status of the Java Virtual Machines * associated with a MonitoredHost. * * @author Brian Doherty * @since 1.5 */public class VmStatusChangeEvent extends HostEvent {     /**     * The set of currently active Java Virtual Machines for the MonitoredHost.     * The set contains an Integer object holding the <em>lvmid</em> for each     * active Java Virtual Machine on the MonitoredHost. This Set will only     * contain Integer objects.     */    protected Set active;     /**     * The set of Java Virtual Machines started on MonitoredHost since the     * previous event. The set contains an Integer object holding the     * <em>lvmid</em> for each Java Virtual Machine started on the     * MonitoredHost. This Set will only contain Integer objects.     */    protected Set started;     /**     * The set of Java Virtual Machines terminated on MonitoredHost since the     * previous event. The set contains an Integer object holding the     * <em>lvmid</em> for each Java Virtual Machine started on the     * MonitoredHost. This Set will only contain Integer objects.     */    protected Set terminated;     /**     * Construct a new VmStatusChangeEvent instance.     *     * @param host the MonitoredHost that is the source of the event.     * @param active the set of currently active Java Virtual Machines     * @param started the set of Java Virtual Machines started since the     *                last event.     * @param terminated the set of Java Virtual Machines terminated since     *                   the last event.     */    public VmStatusChangeEvent(MonitoredHost host, Set active,                               Set started, Set terminated) {        super(host);        this.active = active;        this.started = started;        this.terminated = terminated;    }     /**     * Return the set of currently active Java Virtual Machines.     * The set contains an Integer object holding the <em>lvmid</em> for each     * active Java Virtual Machine on the MonitoredHost.     *     * @return Set - a set of Integer objects containing the <em>lvmid</em>     *               of each active Java Virtual Machine on the host. If     *               there are no active Java Virtual Machines on the host,     *               an empty Set is returned.     */    public Set getActive() {        return active;    }     /**     * Return the set of Java Virtual Machines started since the last     * event notification. The set contains an Integer object holding     * the <em>lvmid</em> for each Java Virtual Machine started on the     * MonitoredHost since the last event notification.     *     * @return Set - a set of Integer objects containing the <em>lvmid</em>     *               of each Java Virtual Machine started on the host. If     *               no Java Virtual Machines were recently started on the     *               host, an empty Set is returned.     */    public Set getStarted() {        return started;    }     /**     * Return the set of Java Virtual Machines terminated since the last     * event notification. The set contains an Integer object holding     * the <em>lvmid</em> for each Java Virtual Machine terminated on the     * MonitoredHost since the last event notification.     *     * @return Set - a set of Integer objects containing the <em>lvmid</em>     *               of each Java Virtual Machine terminated on the host. If     *               no Java Virtual Machines were recently terminated on the     *               host, an empty Set is returned.     */    public Set getTerminated() {        return terminated;    }}