--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/lang/management/OperatingSystemMXBean.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2003-2005 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.lang.management;
+
+/**
+ * The management interface for the operating system on which
+ * the Java virtual machine is running.
+ *
+ * <p> A Java virtual machine has a single instance of the implementation
+ * class of this interface.  This instance implementing this interface is
+ * an <a href="ManagementFactory.html#MXBean">MXBean</a>
+ * that can be obtained by calling
+ * the {@link ManagementFactory#getOperatingSystemMXBean} method or
+ * from the {@link ManagementFactory#getPlatformMBeanServer
+ * platform <tt>MBeanServer</tt>} method.
+ *
+ * <p>The <tt>ObjectName</tt> for uniquely identifying the MXBean for
+ * the operating system within an MBeanServer is:
+ * <blockquote>
+ *    {@link ManagementFactory#OPERATING_SYSTEM_MXBEAN_NAME
+ *      <tt>java.lang:type=OperatingSystem</tt>}
+ * </blockquote>
+ *
+ * <p> This interface defines several convenient methods for accessing
+ * system properties about the operating system on which the Java
+ * virtual machine is running.
+ *
+ * @see <a href="../../../javax/management/package-summary.html">
+ *      JMX Specification.</a>
+ * @see <a href="package-summary.html#examples">
+ *      Ways to Access MXBeans</a>
+ *
+ * @author  Mandy Chung
+ * @since   1.5
+ */
+public interface OperatingSystemMXBean {
+    /**
+     * Returns the operating system name.
+     * This method is equivalent to <tt>System.getProperty("os.name")</tt>.
+     *
+     * @return the operating system name.
+     *
+     * @throws  java.lang.SecurityException
+     *     if a security manager exists and its
+     *     <code>checkPropertiesAccess</code> method doesn't allow access
+     *     to this system property.
+     * @see java.lang.SecurityManager#checkPropertyAccess(java.lang.String)
+     * @see java.lang.System#getProperty
+     */
+    public String getName();
+
+    /**
+     * Returns the operating system architecture.
+     * This method is equivalent to <tt>System.getProperty("os.arch")</tt>.
+     *
+     * @return the operating system architecture.
+     *
+     * @throws  java.lang.SecurityException
+     *     if a security manager exists and its
+     *     <code>checkPropertiesAccess</code> method doesn't allow access
+     *     to this system property.
+     * @see java.lang.SecurityManager#checkPropertyAccess(java.lang.String)
+     * @see java.lang.System#getProperty
+     */
+    public String getArch();
+
+    /**
+     * Returns the operating system version.
+     * This method is equivalent to <tt>System.getProperty("os.version")</tt>.
+     *
+     * @return the operating system version.
+     *
+     * @throws  java.lang.SecurityException
+     *     if a security manager exists and its
+     *     <code>checkPropertiesAccess</code> method doesn't allow access
+     *     to this system property.
+     * @see java.lang.SecurityManager#checkPropertyAccess(java.lang.String)
+     * @see java.lang.System#getProperty
+     */
+    public String getVersion();
+
+    /**
+     * Returns the number of processors available to the Java virtual machine.
+     * This method is equivalent to the {@link Runtime#availableProcessors()}
+     * method.
+     * <p> This value may change during a particular invocation of
+     * the virtual machine.
+     *
+     * @return  the number of processors available to the virtual
+     *          machine; never smaller than one.
+     */
+    public int getAvailableProcessors();
+
+    /**
+     * Returns the system load average for the last minute.
+     * The system load average is the sum of the number of runnable entities
+     * queued to the {@linkplain #getAvailableProcessors available processors}
+     * and the number of runnable entities running on the available processors
+     * averaged over a period of time.
+     * The way in which the load average is calculated is operating system
+     * specific but is typically a damped time-dependent average.
+     * <p>
+     * If the load average is not available, a negative value is returned.
+     * <p>
+     * This method is designed to provide a hint about the system load
+     * and may be queried frequently.
+     * The load average may be unavailable on some platform where it is
+     * expensive to implement this method.
+     *
+     * @return the system load average; or a negative value if not available.
+     *
+     * @since 1.6
+     */
+    public double getSystemLoadAverage();
+}