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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/lang/management/OperatingSystemMXBean.java | |
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Diffstat (limited to 'libjava/classpath/java/lang/management/OperatingSystemMXBean.java')
-rw-r--r-- | libjava/classpath/java/lang/management/OperatingSystemMXBean.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libjava/classpath/java/lang/management/OperatingSystemMXBean.java b/libjava/classpath/java/lang/management/OperatingSystemMXBean.java new file mode 100644 index 000000000..dcc963ef1 --- /dev/null +++ b/libjava/classpath/java/lang/management/OperatingSystemMXBean.java @@ -0,0 +1,119 @@ +/* OperatingSystemMXBean.java - Interface for an operating system bean + Copyright (C) 2006 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package java.lang.management; + +/** + * Provides access to information about the underlying operating + * system. An instance of this bean is obtained by calling + * {@link ManagementFactory#getOperatingSystemMXBean()}. + * + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.5 + */ +public interface OperatingSystemMXBean +{ + + /** + * Returns the name of the underlying system architecture. This + * is equivalent to obtaining the <code>os.arch</code> property + * via {@link System#getProperty(String)}. + * + * @return the name of the underlying system architecture on which + * the VM is running. + * @throws SecurityException if a security manager exists which + * prevents access to the name property. + * @see java.lang.System#getProperty(String) + * @see java.lang.SecurityManager#checkPropertyAccess(String) + */ + String getArch(); + + /** + * Returns the number of processors currently available to the + * virtual machine. This number is subject to change during + * execution of the virtual machine, and will always be >= 1. + * The call is equivalent to {@link Runtime#availableProcessors()}. + * + * @return the number of processors available to the VM. + */ + int getAvailableProcessors(); + + /** + * Returns the name of the underlying operating system. This + * is equivalent to obtaining the <code>os.name</code> property + * via {@link System#getProperty(String)}. + * + * @return the name of the operating system on which the VM + * is running. + * @throws SecurityException if a security manager exists which + * prevents access to the name property. + * @see java.lang.System#getProperty(String) + * @see java.lang.SecurityManager#checkPropertyAccess(String) + */ + String getName(); + + /** + * Returns the system load average for the last minute, or -1 + * if this is unavailable. The availability and calculation + * of the load average is system-dependent, but is usually + * a damped time-dependent average obtained by monitoring the + * number of queued and running processes. It is expected + * that this method will be called frequently to monitor the + * average over time, so it may not be implemented on systems + * where such a call is expensive. + * + * @return the system load average for the last minute, or -1 + * if this is unavailable. + * @since 1.6 + */ + double getSystemLoadAverage(); + + /** + * Returns the version of the underlying operating system. This + * is equivalent to obtaining the <code>os.version</code> property + * via {@link System#getProperty(String)}. + * + * @return the version of the operating system on which the VM + * is running. + * @throws SecurityException if a security manager exists which + * prevents access to the name property. + * @see java.lang.System#getProperty(String) + * @see java.lang.SecurityManager#checkPropertyAccess(String) + */ + String getVersion(); + +} |