1/*
2 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package sun.jvmstat.monitor.event;
27
28import java.util.EventListener;
29
30/**
31 * Interface for listeners of MonitoredVm events.
32 *
33 * @author Brian Doherty
34 * @since 1.5
35 * @see sun.jvmstat.monitor.MonitoredVm
36 */
37public interface VmListener extends EventListener {
38
39    /**
40     * Invoked when instrumentation objects are inserted into or removed
41     * from the MonitoredVm.
42     *
43     * @param event the object describing the event.
44     */
45    void monitorStatusChanged(MonitorStatusChangeEvent event);
46
47    /**
48     * Invoked when instrumentation objects are updated. This event is
49     * generated at a fixed interval as determined by the polling rate
50     * of the MonitoredVm that the VmListener is registered with.
51     *
52     * @param event the object describing the event.
53     */
54    void monitorsUpdated(VmEvent event);
55
56    /**
57     * Invoked when the connection to the MonitoredVm has disconnected
58     * due to communication errors.
59     *
60     * @param event the object describing the event.
61     */
62    void disconnected(VmEvent event);
63}
64