Source for gnu.java.lang.management.RuntimeMXBeanImpl

   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:    */
  82:   public RuntimeMXBeanImpl()
  83:     throws NotCompliantMBeanException
  84:   {
  85:     super(RuntimeMXBean.class);
  86:   }
  87: 
  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: 
  99:   public String getClassPath()
 100:   {
 101:     return System.getProperty("java.class.path");
 102:   }
 103: 
 104:   public List getInputArguments()
 105:   {
 106:     checkMonitorPermissions();
 107:     return Arrays.asList(VMRuntimeMXBeanImpl.getInputArguments());
 108:   }
 109: 
 110:   public String getLibraryPath()
 111:   {
 112:     return System.getProperty("java.library.path");
 113:   }
 114: 
 115:   public String getManagementSpecVersion()
 116:   {
 117:     return "1.0";
 118:   }
 119: 
 120:   public String getName()
 121:   {
 122:     return VMRuntimeMXBeanImpl.getName();
 123:   }
 124: 
 125:   public String getSpecName()
 126:   {
 127:     return System.getProperty("java.vm.specification.name");
 128:   }
 129: 
 130:   public String getSpecVendor()
 131:   {
 132:     return System.getProperty("java.vm.specification.vendor");
 133:   }
 134: 
 135:   public String getSpecVersion()
 136:   {
 137:     return System.getProperty("java.vm.specification.version");
 138:   }
 139: 
 140:   public long getStartTime()
 141:   {
 142:     if (startTime == -1)
 143:       startTime = VMRuntimeMXBeanImpl.getStartTime();
 144:     return startTime;
 145:   }
 146: 
 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: 
 164:   public long getUptime()
 165:   {
 166:     return new Date().getTime() - getStartTime();
 167:   }
 168: 
 169:   public String getVmName()
 170:   {
 171:     return System.getProperty("java.vm.name");
 172:   }
 173: 
 174:   public String getVmVendor()
 175:   {
 176:     return System.getProperty("java.vm.vendor");
 177:   }
 178: 
 179:   public String getVmVersion()
 180:   {
 181:     return System.getProperty("java.vm.version");
 182:   }
 183: 
 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: }