mirror of git://gcc.gnu.org/git/gcc.git
120 lines
4.7 KiB
Java
120 lines
4.7 KiB
Java
/* OperatingSystemMXBean.java - Interface for an operating system bean
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Copyright (C) 2006 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.lang.management;
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/**
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* Provides access to information about the underlying operating
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* system. An instance of this bean is obtained by calling
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* {@link ManagementFactory#getOperatingSystemMXBean()}.
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*
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* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
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* @since 1.5
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*/
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public interface OperatingSystemMXBean
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{
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/**
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* Returns the name of the underlying system architecture. This
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* is equivalent to obtaining the <code>os.arch</code> property
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* via {@link System#getProperty(String)}.
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*
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* @return the name of the underlying system architecture on which
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* the VM is running.
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* @throws SecurityException if a security manager exists which
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* prevents access to the name property.
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* @see java.lang.System#getProperty(String)
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* @see java.lang.SecurityManager#checkPropertyAccess(String)
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*/
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String getArch();
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/**
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* Returns the number of processors currently available to the
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* virtual machine. This number is subject to change during
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* execution of the virtual machine, and will always be >= 1.
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* The call is equivalent to {@link Runtime#availableProcessors()}.
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*
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* @return the number of processors available to the VM.
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*/
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int getAvailableProcessors();
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/**
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* Returns the name of the underlying operating system. This
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* is equivalent to obtaining the <code>os.name</code> property
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* via {@link System#getProperty(String)}.
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*
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* @return the name of the operating system on which the VM
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* is running.
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* @throws SecurityException if a security manager exists which
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* prevents access to the name property.
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* @see java.lang.System#getProperty(String)
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* @see java.lang.SecurityManager#checkPropertyAccess(String)
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*/
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String getName();
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/**
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* Returns the system load average for the last minute, or -1
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* if this is unavailable. The availability and calculation
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* of the load average is system-dependent, but is usually
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* a damped time-dependent average obtained by monitoring the
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* number of queued and running processes. It is expected
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* that this method will be called frequently to monitor the
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* average over time, so it may not be implemented on systems
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* where such a call is expensive.
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*
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* @return the system load average for the last minute, or -1
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* if this is unavailable.
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* @since 1.6
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*/
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double getSystemLoadAverage();
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/**
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* Returns the version of the underlying operating system. This
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* is equivalent to obtaining the <code>os.version</code> property
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* via {@link System#getProperty(String)}.
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*
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* @return the version of the operating system on which the VM
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* is running.
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* @throws SecurityException if a security manager exists which
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* prevents access to the name property.
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* @see java.lang.System#getProperty(String)
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* @see java.lang.SecurityManager#checkPropertyAccess(String)
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*/
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String getVersion();
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}
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