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| 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 | |||
| 26 | package sun.jvmstat.perfdata.monitor; | ||
| 27 | |||
| 28 | import java.util.List; | ||
| 29 | import java.lang.reflect.*; | ||
| 30 | import java.io.*; | ||
| 31 | |||
| 32 | import sun.jvmstat.monitor.*; | ||
| 33 | import sun.jvmstat.monitor.remote.*; | ||
| 34 | import sun.jvmstat.monitor.event.VmListener; | ||
| 35 | |||
| 36 | /** | ||
| 37 | * Base class for all MonitoredVm implementations that utilize the | ||
| 38 | * HotSpot PerfData instrumentation buffer as the communications | ||
| 39 | * mechanism to the target Java Virtual Machine. | ||
| 40 | * | ||
| 41 | * @author Brian Doherty | ||
| 42 | * @since 1.5 | ||
| 43 | */ | ||
| 44 | public abstract class AbstractMonitoredVm implements BufferedMonitoredVm { | ||
| 45 | |||
| 46 | /** | ||
| 47 | * The VmIdentifier for the target. | ||
| 48 | */ | ||
| 49 | protected VmIdentifier vmid; | ||
| 50 | |||
| 51 | /** | ||
| 52 | * The shared memory instrumentation buffer for the target. | ||
| 53 | */ | ||
| 54 | protected AbstractPerfDataBuffer pdb; | ||
| 55 | |||
| 56 | /** | ||
| 57 | * The sampling interval, if the instrumentation buffer is acquired | ||
| 58 | * by sampling instead of shared memory mechanisms. | ||
| 59 | */ | ||
| 60 | protected int interval; | ||
| 61 | |||
| 62 | /** | ||
| 63 | * Create an AbstractMonitoredVm instance. | ||
| 64 | * | ||
| 65 | * @param vmid the VmIdentifier for the target | ||
| 66 | * @param interval the initial sampling interval | ||
| 67 | */ | ||
| 68 | public AbstractMonitoredVm(VmIdentifier vmid, int interval) | ||
| 69 | throws MonitorException { | ||
| 70 | this.vmid = vmid; | ||
| 71 | this.interval = interval; | ||
| 72 | } | ||
| 73 | |||
| 74 | /** | ||
| 75 | * {@inheritDoc} | ||
| 76 | */ | ||
| 77 | public VmIdentifier getVmIdentifier() { | ||
| 78 | return vmid; | ||
| 79 | } | ||
| 80 | |||
| 81 | /** | ||
| 82 | * {@inheritDoc} | ||
| 83 | */ | ||
| 84 | public Monitor findByName(String name) throws MonitorException { | ||
| 85 | return pdb.findByName(name); | ||
| 86 | } | ||
| 87 | |||
| 88 | /** | ||
| 89 | * {@inheritDoc} | ||
| 90 | */ | ||
| 91 | public List<Monitor> findByPattern(String patternString) throws MonitorException { | ||
| 92 | return pdb.findByPattern(patternString); | ||
| 93 | } | ||
| 94 | |||
| 95 | /** | ||
| 96 | * {@inheritDoc} | ||
| 97 | */ | ||
| 98 | public void detach() { | ||
| 99 | /* | ||
| 100 | * no default action required because the detach operation for the | ||
| 101 | * native byte buffer is managed by the sun.misc.Perf class. | ||
| 102 | */ | ||
| 103 | } | ||
| 104 | |||
| 105 | |||
| 106 | /* ---- Methods to support polled MonitoredVm Implementations ----- */ | ||
| 107 | |||
| 108 | /** | ||
| 109 | * {@inheritDoc} | ||
| 110 | */ | ||
| 111 | public void setInterval(int interval) { | ||
| 112 | this.interval = interval; | ||
| 113 | } | ||
| 114 | |||
| 115 | /** | ||
| 116 | * {@inheritDoc} | ||
| 117 | */ | ||
| 118 | public int getInterval() { | ||
| 119 | return interval; | ||
| 120 | } | ||
| 121 | |||
| 122 | /** | ||
| 123 | * {@inheritDoc} | ||
| 124 | */ | ||
| 125 | public void setLastException(Exception e) { | ||
| 126 | // XXX: implement | ||
| 127 | } | ||
| 128 | |||
| 129 | /** | ||
| 130 | * {@inheritDoc} | ||
| 131 | */ | ||
| 132 | public Exception getLastException() { | ||
| 133 | // XXX: implement | ||
| 134 | return null; | ||
| 135 | } | ||
| 136 | |||
| 137 | /** | ||
| 138 | * {@inheritDoc} | ||
| 139 | */ | ||
| 140 | public void clearLastException() { | ||
| 141 | // XXX: implement | ||
| 142 | } | ||
| 143 | |||
| 144 | /** | ||
| 145 | * {@inheritDoc} | ||
| 146 | */ | ||
| 147 | public boolean isErrored() { | ||
| 148 | // XXX: implement | ||
| 149 | return false; | ||
| 150 | } | ||
| 151 | |||
| 152 | /** | ||
| 153 | * Get a list of the inserted and removed monitors since last called. | ||
| 154 | * | ||
| 155 | * @return MonitorStatus - the status of available Monitors for the | ||
| 156 | * target Java Virtual Machine. | ||
| 157 | * @throws MonitorException Thrown if communications errors occur | ||
| 158 | * while communicating with the target. | ||
| 159 | */ | ||
| 160 | public MonitorStatus getMonitorStatus() throws MonitorException { | ||
| 161 | return pdb.getMonitorStatus(); | ||
| 162 | } | ||
| 163 | |||
| 164 | |||
| 165 | /* --------------- Methods to support VmListeners ----------------- */ | ||
| 166 | |||
| 167 | /** | ||
| 168 | * {@inheritDoc} | ||
| 169 | */ | ||
| 170 | public abstract void addVmListener(VmListener l); | ||
| 171 | |||
| 172 | /** | ||
| 173 | * {@inheritDoc} | ||
| 174 | */ | ||
| 175 | public abstract void removeVmListener(VmListener l); | ||
| 176 | |||
| 177 | |||
| 178 | /* ---- Methods to support BufferedMonitoredVm Implementations ---- */ | ||
| 179 | |||
| 180 | /** | ||
| 181 | * {@inheritDoc} | ||
| 182 | */ | ||
| 183 | public byte[] getBytes() { | ||
| 184 | return pdb.getBytes(); | ||
| 185 | } | ||
| 186 | |||
| 187 | /** | ||
| 188 | * {@inheritDoc} | ||
| 189 | */ | ||
| 190 | public int getCapacity() { | ||
| 191 | return pdb.getCapacity(); | ||
| 192 | } | ||
| 193 | } | ||