1 /* RuntimeMXBeanImpl.java - Implementation of an runtime bean 2 Copyright (C) 2006 Free Software Foundation 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 package gnu.java.lang.management; 39 40 import gnu.classpath.SystemProperties; 41 42 import java.lang.management.RuntimeMXBean; 43 44 import java.util.Arrays; 45 import java.util.Date; 46 import java.util.HashMap; 47 import java.util.Iterator; 48 import java.util.List; 49 import java.util.Map; 50 import java.util.Properties; 51 52 import javax.management.NotCompliantMBeanException; 53 54 /** 55 * Provides access to information about the virtual machine. 56 * 57 * @author Andrew John Hughes (gnu_andrew@member.fsf.org) 58 * @since 1.5 59 */ 60 public final class RuntimeMXBeanImpl 61 extends BeanImpl 62 implements RuntimeMXBean 63 { 64 65 private static final String SUN_BOOT_CLASS_PATH = "sun.boot.class.path"; 66 private static final String JAVA_BOOT_CLASS_PATH = "java.boot.class.path"; 67 68 private long startTime = -1; 69 70 private String bootClassPath = null; 71 72 private boolean bootClassPathSupported = true; 73 74 /** 75 * Constructs a new <code>RuntimeMXBeanImpl</code>. 76 * 77 * @throws NotCompliantMBeanException if this class doesn't implement 78 * the interface or a method appears 79 * in the interface that doesn't comply 80 * with the naming conventions. 81 */ RuntimeMXBeanImpl()82 public RuntimeMXBeanImpl() 83 throws NotCompliantMBeanException 84 { 85 super(RuntimeMXBean.class); 86 } 87 getBootClassPath()88 public String getBootClassPath() 89 { 90 checkMonitorPermissions(); 91 if (isBootClassPathSupported()) 92 return bootClassPath; 93 else 94 throw 95 new UnsupportedOperationException("Retrieving the boot " + 96 "classpath is not supported."); 97 } 98 getClassPath()99 public String getClassPath() 100 { 101 return System.getProperty("java.class.path"); 102 } 103 getInputArguments()104 public List getInputArguments() 105 { 106 checkMonitorPermissions(); 107 return Arrays.asList(VMRuntimeMXBeanImpl.getInputArguments()); 108 } 109 getLibraryPath()110 public String getLibraryPath() 111 { 112 return System.getProperty("java.library.path"); 113 } 114 getManagementSpecVersion()115 public String getManagementSpecVersion() 116 { 117 return "1.0"; 118 } 119 getName()120 public String getName() 121 { 122 return VMRuntimeMXBeanImpl.getName(); 123 } 124 getSpecName()125 public String getSpecName() 126 { 127 return System.getProperty("java.vm.specification.name"); 128 } 129 getSpecVendor()130 public String getSpecVendor() 131 { 132 return System.getProperty("java.vm.specification.vendor"); 133 } 134 getSpecVersion()135 public String getSpecVersion() 136 { 137 return System.getProperty("java.vm.specification.version"); 138 } 139 getStartTime()140 public long getStartTime() 141 { 142 if (startTime == -1) 143 startTime = VMRuntimeMXBeanImpl.getStartTime(); 144 return startTime; 145 } 146 getSystemProperties()147 public Map getSystemProperties() 148 { 149 Map map = new HashMap(); 150 Properties props = System.getProperties(); 151 Iterator entries = props.entrySet().iterator(); 152 while (entries.hasNext()) 153 { 154 Map.Entry next = (Map.Entry) entries.next(); 155 Object key = next.getKey(); 156 Object value = next.getValue(); 157 if (key instanceof String && 158 value instanceof String) 159 map.put(key, value); 160 } 161 return map; 162 } 163 getUptime()164 public long getUptime() 165 { 166 return new Date().getTime() - getStartTime(); 167 } 168 getVmName()169 public String getVmName() 170 { 171 return System.getProperty("java.vm.name"); 172 } 173 getVmVendor()174 public String getVmVendor() 175 { 176 return System.getProperty("java.vm.vendor"); 177 } 178 getVmVersion()179 public String getVmVersion() 180 { 181 return System.getProperty("java.vm.version"); 182 } 183 isBootClassPathSupported()184 public boolean isBootClassPathSupported() 185 { 186 if (bootClassPath == null) 187 { 188 bootClassPath = SystemProperties.getProperty(JAVA_BOOT_CLASS_PATH); 189 if (bootClassPath == null) 190 bootClassPath = SystemProperties.getProperty(SUN_BOOT_CLASS_PATH); 191 if (bootClassPath == null) 192 bootClassPathSupported = false; 193 } 194 return bootClassPathSupported; 195 } 196 197 } 198