1 /* RuntimeMXBeanImpl.java - Implementation of an runtime bean
2 Copyright (C) 2006 Free Software Foundation
4 This file is part of GNU Classpath.
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)
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.
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
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
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. */
38 package gnu.java.lang.management;
40 import gnu.classpath.SystemProperties;
42 import java.lang.management.RuntimeMXBean;
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;
50 import java.util.Properties;
52 import javax.management.NotCompliantMBeanException;
55 * Provides access to information about the virtual machine.
57 * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
60 public final class RuntimeMXBeanImpl
62 implements RuntimeMXBean
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";
68 private long startTime = -1;
70 private String bootClassPath = null;
72 private boolean bootClassPathSupported = true;
75 * Constructs a new <code>RuntimeMXBeanImpl</code>.
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.
82 public RuntimeMXBeanImpl()
83 throws NotCompliantMBeanException
85 super(RuntimeMXBean.class);
88 public String getBootClassPath()
90 checkMonitorPermissions();
91 if (isBootClassPathSupported())
95 new UnsupportedOperationException("Retrieving the boot " +
96 "classpath is not supported.");
99 public String getClassPath()
101 return System.getProperty("java.class.path");
104 public List getInputArguments()
106 checkMonitorPermissions();
107 return Arrays.asList(VMRuntimeMXBeanImpl.getInputArguments());
110 public String getLibraryPath()
112 return System.getProperty("java.library.path");
115 public String getManagementSpecVersion()
120 public String getName()
122 return VMRuntimeMXBeanImpl.getName();
125 public String getSpecName()
127 return System.getProperty("java.vm.specification.name");
130 public String getSpecVendor()
132 return System.getProperty("java.vm.specification.vendor");
135 public String getSpecVersion()
137 return System.getProperty("java.vm.specification.version");
140 public long getStartTime()
143 startTime = VMRuntimeMXBeanImpl.getStartTime();
147 public Map getSystemProperties()
149 Map map = new HashMap();
150 Properties props = System.getProperties();
151 Iterator entries = props.entrySet().iterator();
152 while (entries.hasNext())
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)
164 public long getUptime()
166 return new Date().getTime() - getStartTime();
169 public String getVmName()
171 return System.getProperty("java.vm.name");
174 public String getVmVendor()
176 return System.getProperty("java.vm.vendor");
179 public String getVmVersion()
181 return System.getProperty("java.vm.version");
184 public boolean isBootClassPathSupported()
186 if (bootClassPath == null)
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;
194 return bootClassPathSupported;