Interface UnixOperatingSystemMXBean

All Superinterfaces:

OperatingSystemMXBean, OperatingSystemMXBean, OperatingSystemMXBean, PlatformManagedObject, UnixOperatingSystemMXBean

public interface UnixOperatingSystemMXBean
extends UnixOperatingSystemMXBean, OperatingSystemMXBean

Interface provides platform-specific management utilities on Unix and Unix-like operating systems.

Since:

1.8

Method Summary

Modifier and Type	Method	Description
long	getMaxFileDescriptorCount()	Returns the maximum number of file descriptors that can be opened in a process.
long	getOpenFileDescriptorCount()	Returns the current number of file descriptors that are in opened state.

Methods declared in interface OperatingSystemMXBean

getCommittedVirtualMemorySize, getFreeSwapSpaceSize, getHardwareModel, getProcessCpuLoad, getProcessCpuTime, getProcessingCapacity, getProcessPhysicalMemorySize, getProcessPrivateMemorySize, getTotalSwapSpaceSize, isHardwareEmulated, isProcessRunning, retrieveMemoryUsage, retrieveMemoryUsage, retrieveProcessorUsage, retrieveProcessorUsage, retrieveTotalProcessorUsage, retrieveTotalProcessorUsage

Modifier and Type	Method	Description
long	getCommittedVirtualMemorySize()	Returns the amount of virtual memory used by the process in bytes.
long	getFreeSwapSpaceSize()	Returns the amount of free swap space in bytes.
String	getHardwareModel()	Instantiates and returns an instance of a String object containing hardware model information
double	getProcessCpuLoad()	Returns the recent CPU usage for the Java Virtual Machine process.
long	getProcessCpuTime()	Returns total amount of time the process has been scheduled or executed so far in both kernel and user modes.
int	getProcessingCapacity()	Returns the collective capacity of the virtual processors in the partition the VM is running in.
long	getProcessPhysicalMemorySize()	Returns the amount of physical memory being used by the process in bytes.
long	getProcessPrivateMemorySize()	Returns the amount of private memory used by the process in bytes.
long	getTotalSwapSpaceSize()	Returns the total amount of swap space in bytes.
boolean	isHardwareEmulated()	Identify whether the underlying hardware is being emulated
boolean	isProcessRunning(long pid)	Indicates if the specified process is running
MemoryUsage	retrieveMemoryUsage()	Instantiates and returns an instance of MemoryUsage object that represents the current snapshot of Memory usage statistics.
MemoryUsage	retrieveMemoryUsage(MemoryUsage memObj)	Returns an updated MemoryUsage object that represents the current snapshot of Memory usage statistics.
ProcessorUsage[]	retrieveProcessorUsage()	Instantiates and returns an array of ProcessorUsage objects that represent the current snapshot of individual Processor usage times.
ProcessorUsage[]	retrieveProcessorUsage(ProcessorUsage[] procArray)	Returns an updated array of ProcessorUsage objects that represent the current snapshot of individual Processor usage times.
ProcessorUsage	retrieveTotalProcessorUsage()	Instantiate and return a new ProcessorUsage object that represents the current snapshot of Processor usage statistics.
ProcessorUsage	retrieveTotalProcessorUsage(ProcessorUsage procObj)	Returns an updated ProcessorUsage object that represents the current snapshot of Processor usage statistics.

Methods declared in interface OperatingSystemMXBean

getCpuLoad, getFreeMemorySize, getFreePhysicalMemorySize, getSystemCpuLoad, getTotalMemorySize, getTotalPhysicalMemorySize

Modifier and Type	Method	Description
double	getCpuLoad()	Returns the "recent CPU usage" for the operating environment.
long	getFreeMemorySize()	Returns the amount of free memory in bytes.
default long	getFreePhysicalMemorySize()	Deprecated. Use OperatingSystemMXBean.getFreeMemorySize() instead of this historically named method.
default double	getSystemCpuLoad()	Deprecated. Use OperatingSystemMXBean.getCpuLoad() instead of this historically named method.
long	getTotalMemorySize()	Returns the total amount of memory in bytes.
default long	getTotalPhysicalMemorySize()	Deprecated. Use OperatingSystemMXBean.getTotalMemorySize() instead of this historically named method.

Methods declared in interface OperatingSystemMXBean

getArch, getAvailableProcessors, getName, getSystemLoadAverage, getVersion

Modifier and Type	Method	Description
String	getArch()	Returns the operating system architecture.
int	getAvailableProcessors()	Returns the number of processors available to the Java virtual machine.
String	getName()	Returns the operating system name.
double	getSystemLoadAverage()	Returns the system load average for the last minute.
String	getVersion()	Returns the operating system version.

Methods declared in interface PlatformManagedObject

getObjectName

Modifier and Type	Method	Description
ObjectName	getObjectName()	Returns an ObjectName instance representing the object name of this platform managed object.

Method Details

getMaxFileDescriptorCount

long getMaxFileDescriptorCount()

Returns the maximum number of file descriptors that can be opened in a process.

Specified by:

getMaxFileDescriptorCount in interface UnixOperatingSystemMXBean

Returns:

The maximum number of file descriptors that can be opened in a process or -1, if an error occurred while obtaining this. If the operating system doesn't have any limits configured, Long.MAX_VALUE is returned.

Since:

1.8

getOpenFileDescriptorCount

long getOpenFileDescriptorCount()

Returns the current number of file descriptors that are in opened state.

Specified by:

getOpenFileDescriptorCount in interface UnixOperatingSystemMXBean

Returns:

The current number of file descriptors that are in opened state or -1, if an error occurred while obtaining this.

Since:

1.8