001: /*
002: * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
003: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004: *
005: * This code is free software; you can redistribute it and/or modify it
006: * under the terms of the GNU General Public License version 2 only, as
007: * published by the Free Software Foundation. Sun designates this
008: * particular file as subject to the "Classpath" exception as provided
009: * by Sun in the LICENSE file that accompanied this code.
010: *
011: * This code is distributed in the hope that it will be useful, but WITHOUT
012: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014: * version 2 for more details (a copy is included in the LICENSE file that
015: * accompanied this code).
016: *
017: * You should have received a copy of the GNU General Public License version
018: * 2 along with this work; if not, write to the Free Software Foundation,
019: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020: *
021: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022: * CA 95054 USA or visit www.sun.com if you need additional information or
023: * have any questions.
024: */
025:
026: package sun.jvmstat.monitor.event;
027:
028: import java.util.Set;
029: import sun.jvmstat.monitor.MonitoredHost;
030:
031: /**
032: * Provides a description of a change in status of the Java Virtual Machines
033: * associated with a MonitoredHost.
034: *
035: * @author Brian Doherty
036: * @version 1.8, 05/05/07
037: * @since 1.5
038: */
039: public class VmStatusChangeEvent extends HostEvent {
040:
041: /**
042: * The set of currently active Java Virtual Machines for the MonitoredHost.
043: * The set contains an Integer object holding the <em>lvmid</em> for each
044: * active Java Virtual Machine on the MonitoredHost. This Set will only
045: * contain Integer objects.
046: */
047: protected Set active;
048:
049: /**
050: * The set of Java Virtual Machines started on MonitoredHost since the
051: * previous event. The set contains an Integer object holding the
052: * <em>lvmid</em> for each Java Virtual Machine started on the
053: * MonitoredHost. This Set will only contain Integer objects.
054: */
055: protected Set started;
056:
057: /**
058: * The set of Java Virtual Machines terminated on MonitoredHost since the
059: * previous event. The set contains an Integer object holding the
060: * <em>lvmid</em> for each Java Virtual Machine started on the
061: * MonitoredHost. This Set will only contain Integer objects.
062: */
063: protected Set terminated;
064:
065: /**
066: * Construct a new VmStatusChangeEvent instance.
067: *
068: * @param host the MonitoredHost that is the source of the event.
069: * @param active the set of currently active Java Virtual Machines
070: * @param started the set of Java Virtual Machines started since the
071: * last event.
072: * @param terminated the set of Java Virtual Machines terminated since
073: * the last event.
074: */
075: public VmStatusChangeEvent(MonitoredHost host, Set active,
076: Set started, Set terminated) {
077: super (host);
078: this .active = active;
079: this .started = started;
080: this .terminated = terminated;
081: }
082:
083: /**
084: * Return the set of currently active Java Virtual Machines.
085: * The set contains an Integer object holding the <em>lvmid</em> for each
086: * active Java Virtual Machine on the MonitoredHost.
087: *
088: * @return Set - a set of Integer objects containing the <em>lvmid</em>
089: * of each active Java Virtual Machine on the host. If
090: * there are no active Java Virtual Machines on the host,
091: * an empty Set is returned.
092: */
093: public Set getActive() {
094: return active;
095: }
096:
097: /**
098: * Return the set of Java Virtual Machines started since the last
099: * event notification. The set contains an Integer object holding
100: * the <em>lvmid</em> for each Java Virtual Machine started on the
101: * MonitoredHost since the last event notification.
102: *
103: * @return Set - a set of Integer objects containing the <em>lvmid</em>
104: * of each Java Virtual Machine started on the host. If
105: * no Java Virtual Machines were recently started on the
106: * host, an empty Set is returned.
107: */
108: public Set getStarted() {
109: return started;
110: }
111:
112: /**
113: * Return the set of Java Virtual Machines terminated since the last
114: * event notification. The set contains an Integer object holding
115: * the <em>lvmid</em> for each Java Virtual Machine terminated on the
116: * MonitoredHost since the last event notification.
117: *
118: * @return Set - a set of Integer objects containing the <em>lvmid</em>
119: * of each Java Virtual Machine terminated on the host. If
120: * no Java Virtual Machines were recently terminated on the
121: * host, an empty Set is returned.
122: */
123: public Set getTerminated() {
124: return terminated;
125: }
126: }
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