Class UnixExtendedOperatingSystem

java.lang.Object

com.ibm.java.lang.management.internal.OperatingSystemMXBeanImpl

com.ibm.lang.management.internal.ExtendedOperatingSystemMXBeanImpl

com.ibm.lang.management.internal.UnixExtendedOperatingSystem

All Implemented Interfaces:

OperatingSystemMXBean, UnixOperatingSystemMXBean, OperatingSystemMXBean, UnixOperatingSystemMXBean, OperatingSystemMXBean, PlatformManagedObject, NotificationBroadcaster, NotificationEmitter

public final class UnixExtendedOperatingSystem
extends ExtendedOperatingSystemMXBeanImpl
implements UnixOperatingSystemMXBean

Method Summary

Modifier and Type	Method	Description
void	addNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)	Adds a listener to this MBean.
static UnixExtendedOperatingSystem	getInstance()
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.
final void	removeNotificationListener(NotificationListener listener)	Removes a listener from this MBean.
final void	removeNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)	Removes a listener from this MBean.
final void	sendNotification(Notification notification)	Send notifications to registered listeners.

Methods declared in class com.ibm.lang.management.internal.ExtendedOperatingSystemMXBeanImpl

getCommittedVirtualMemorySize, getCpuLoad, getFreeMemorySize, getFreeSwapSpaceSize, getHardwareModel, getNotificationInfo, getProcessCpuLoad, getProcessCpuTime, getProcessingCapacity, getProcessPhysicalMemorySize, getProcessPrivateMemorySize, getTotalMemorySize, getTotalSwapSpaceSize, isHardwareEmulated, isProcessRunning, retrieveMemoryUsage, retrieveMemoryUsage, retrieveProcessorUsage, retrieveProcessorUsage, retrieveTotalProcessorUsage, retrieveTotalProcessorUsage

Methods declared in class com.ibm.java.lang.management.internal.OperatingSystemMXBeanImpl

getArch, getAvailableProcessors, getName, getObjectName, getSystemLoadAverage, getVersion

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods declared in interface com.ibm.lang.management.OperatingSystemMXBean

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

Methods declared in interface com.sun.management.OperatingSystemMXBean

getCpuLoad, getFreeMemorySize, getFreePhysicalMemorySize, getSystemCpuLoad, getTotalMemorySize, getTotalPhysicalMemorySize

Methods declared in interface java.lang.management.OperatingSystemMXBean

getArch, getAvailableProcessors, getName, getSystemLoadAverage, getVersion

Methods declared in interface java.lang.management.PlatformManagedObject

getObjectName

Method Details

getInstance

public static UnixExtendedOperatingSystem getInstance()

getMaxFileDescriptorCount

public long getMaxFileDescriptorCount()

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

Specified by:

getMaxFileDescriptorCount in interface UnixOperatingSystemMXBean

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.

getOpenFileDescriptorCount

public long getOpenFileDescriptorCount()

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

Specified by:

getOpenFileDescriptorCount in interface UnixOperatingSystemMXBean

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.

addNotificationListener

public void addNotificationListener(NotificationListener listener,
 NotificationFilter filter,
 Object handback)
                             throws IllegalArgumentException

Adds a listener to this MBean.

Specified by:

addNotificationListener in interface NotificationBroadcaster

Parameters:

listener - The listener object which will handle the notifications emitted by the broadcaster.

filter - The filter object. If filter is null, no filtering will be performed before handling notifications.

handback - An opaque object to be sent back to the listener when a notification is emitted. This object cannot be used by the Notification broadcaster object. It should be resent unchanged with the notification to the listener.

Throws:

IllegalArgumentException - Listener parameter is null.

See Also:

• NotificationBroadcaster.removeNotificationListener(javax.management.NotificationListener)

removeNotificationListener

public final void removeNotificationListener(NotificationListener listener)
                                      throws ListenerNotFoundException

Removes a listener from this MBean. If the listener has been registered with different handback objects or notification filters, all entries corresponding to the listener will be removed.

Specified by:

removeNotificationListener in interface NotificationBroadcaster

Parameters:

listener - A listener that was previously added to this MBean.

Throws:

ListenerNotFoundException - The listener is not registered with the MBean.

See Also:

• NotificationBroadcaster.addNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)
• NotificationEmitter.removeNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)

removeNotificationListener

public final void removeNotificationListener(NotificationListener listener,
 NotificationFilter filter,
 Object handback)
                                      throws ListenerNotFoundException

Removes a listener from this MBean. The MBean must have a listener that exactly matches the given listener, filter, and handback parameters. If there is more than one such listener, only one is removed.

The filter and handback parameters may be null if and only if they are null in a listener to be removed.

Specified by:

removeNotificationListener in interface NotificationEmitter

Parameters:

listener - A listener that was previously added to this MBean.

filter - The filter that was specified when the listener was added.

handback - The handback that was specified when the listener was added.

Throws:

ListenerNotFoundException - The listener is not registered with the MBean, or it is not registered with the given filter and handback.

sendNotification

public final void sendNotification(Notification notification)

Send notifications to registered listeners.

Parameters:

notification - a notification to be sent