138 lines
5.3 KiB
Java
138 lines
5.3 KiB
Java
/*
|
|
* Copyright (c) 2003, 2019, Oracle and/or its affiliates. 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. Oracle designates this
|
|
* particular file as subject to the "Classpath" exception as provided
|
|
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
package com.sun.management;
|
|
|
|
/**
|
|
* Platform-specific management interface for the operating system
|
|
* on which the Java virtual machine is running.
|
|
*
|
|
* <p>
|
|
* This interface provides information about the operating environment
|
|
* on which the Java virtual machine is running. That might be a native
|
|
* operating system, a virtualized operating system environment, or a
|
|
* container-managed environment.
|
|
*
|
|
* <p>
|
|
* The <tt>OperatingSystemMXBean</tt> object returned by
|
|
* {@link java.lang.management.ManagementFactory#getOperatingSystemMXBean()}
|
|
* is an instance of the implementation class of this interface
|
|
* or {@link UnixOperatingSystemMXBean} interface depending on
|
|
* its underlying operating system.
|
|
*
|
|
* @author Mandy Chung
|
|
* @since 1.5
|
|
*/
|
|
@jdk.Exported
|
|
public interface OperatingSystemMXBean extends
|
|
java.lang.management.OperatingSystemMXBean {
|
|
|
|
/**
|
|
* Returns the amount of virtual memory that is guaranteed to
|
|
* be available to the running process in bytes,
|
|
* or <tt>-1</tt> if this operation is not supported.
|
|
*
|
|
* @return the amount of virtual memory that is guaranteed to
|
|
* be available to the running process in bytes,
|
|
* or <tt>-1</tt> if this operation is not supported.
|
|
*/
|
|
public long getCommittedVirtualMemorySize();
|
|
|
|
/**
|
|
* Returns the total amount of swap space in bytes.
|
|
*
|
|
* @return the total amount of swap space in bytes.
|
|
*/
|
|
public long getTotalSwapSpaceSize();
|
|
|
|
/**
|
|
* Returns the amount of free swap space in bytes.
|
|
*
|
|
* @return the amount of free swap space in bytes.
|
|
*/
|
|
public long getFreeSwapSpaceSize();
|
|
|
|
/**
|
|
* Returns the CPU time used by the process on which the Java
|
|
* virtual machine is running in nanoseconds. The returned value
|
|
* is of nanoseconds precision but not necessarily nanoseconds
|
|
* accuracy. This method returns <tt>-1</tt> if the
|
|
* the platform does not support this operation.
|
|
*
|
|
* @return the CPU time used by the process in nanoseconds,
|
|
* or <tt>-1</tt> if this operation is not supported.
|
|
*/
|
|
public long getProcessCpuTime();
|
|
|
|
/**
|
|
* Returns the amount of free physical memory in bytes.
|
|
*
|
|
* @return the amount of free physical memory in bytes.
|
|
*/
|
|
public long getFreePhysicalMemorySize();
|
|
|
|
/**
|
|
* Returns the total amount of physical memory in bytes.
|
|
*
|
|
* @return the total amount of physical memory in bytes.
|
|
*/
|
|
public long getTotalPhysicalMemorySize();
|
|
|
|
/**
|
|
* Returns the "recent cpu usage" for the whole system. This value is a
|
|
* double in the [0.0,1.0] interval. A value of 0.0 means that all CPUs
|
|
* were idle during the recent period of time observed, while a value
|
|
* of 1.0 means that all CPUs were actively running 100% of the time
|
|
* during the recent period being observed. All values betweens 0.0 and
|
|
* 1.0 are possible depending of the activities going on in the system.
|
|
* If the system recent cpu usage is not available, the method returns a
|
|
* negative value.
|
|
*
|
|
* @return the "recent cpu usage" for the whole system; a negative
|
|
* value if not available.
|
|
* @since 1.7
|
|
*/
|
|
public double getSystemCpuLoad();
|
|
|
|
/**
|
|
* Returns the "recent cpu usage" for the Java Virtual Machine process.
|
|
* This value is a double in the [0.0,1.0] interval. A value of 0.0 means
|
|
* that none of the CPUs were running threads from the JVM process during
|
|
* the recent period of time observed, while a value of 1.0 means that all
|
|
* CPUs were actively running threads from the JVM 100% of the time
|
|
* during the recent period being observed. Threads from the JVM include
|
|
* the application threads as well as the JVM internal threads. All values
|
|
* betweens 0.0 and 1.0 are possible depending of the activities going on
|
|
* in the JVM process and the whole system. If the Java Virtual Machine
|
|
* recent CPU usage is not available, the method returns a negative value.
|
|
*
|
|
* @return the "recent cpu usage" for the Java Virtual Machine process;
|
|
* a negative value if not available.
|
|
* @since 1.7
|
|
*/
|
|
public double getProcessCpuLoad();
|
|
|
|
}
|