gnu.java.lang.management
Class MemoryMXBeanImpl
- DynamicMBean, MemoryMXBean, NotificationBroadcaster, NotificationEmitter
Provides access to information about the memory
management of the current invocation of the virtual
machine. Instances of this bean are obtained by calling
ManagementFactory.getMemoryMXBean().
cacheMBeanInfo, getAttribute, getAttributes, getCachedMBeanInfo, getClassName, getConstructors, getDescription, getDescription, getDescription, getDescription, getDescription, getDescription, getDescription, getImpact, getImplementation, getImplementationClass, getMBeanInfo, getMBeanInterface, getParameterName, getParameterName, invoke, setAttribute, setAttributes, setImplementation |
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
addNotificationListener
public void addNotificationListener(NotificationListener listener,
NotificationFilter filter,
Object passback) Registers the specified listener as a new recipient of
notifications from this bean. If non-null, the filter
argument will be used to select which notifications are
delivered. The supplied object will also be passed to
the recipient with each notification. This should not
be modified by the broadcaster, but instead should be
passed unmodified to the listener.
- addNotificationListener in interface NotificationBroadcaster
listener - the new listener, who will receive
notifications from this broadcasting bean.filter - a filter to determine which notifications are
delivered to the listener, or null
if no filtering is required.passback - an object to be passed to the listener with
each notification.
gc
public void gc()
Instigates a garbage collection cycle. The virtual
machine's garbage collector should make the best
attempt it can at reclaiming unused memory. This
is equivalent to invoking java.lang.System.gc().
- gc in interface MemoryMXBean
getObjectPendingFinalizationCount
public int getObjectPendingFinalizationCount()
Returns the number of objects which are waiting to
be garbage collected (finalized). An object is
finalized when the garbage collector determines that
there are no more references to that object are in
use.
- getObjectPendingFinalizationCount in interface MemoryMXBean
- the number of objects awaiting finalization.
isVerbose
public boolean isVerbose()
Returns true if the virtual machine will emit additional
information when memory is allocated and deallocated. The
format of the output is left up to the virtual machine.
- isVerbose in interface MemoryMXBean
- true if verbose memory output is on.
removeNotificationListener
public void removeNotificationListener(NotificationListener listener,
NotificationFilter filter,
Object passback)
throws ListenerNotFoundException Removes the specified listener from the list of recipients
of notifications from this bean. Only the first instance with
the supplied filter and passback object is removed.
null is used as a valid value for these parameters,
rather than as a way to remove all registration instances for
the specified listener; for this behaviour instead, see the details
of the same method in
NotificationBroadcaster.
- removeNotificationListener in interface NotificationEmitter
listener - the listener to remove.filter - the filter of the listener to remove.passback - the passback object of the listener to remove.
addNotificationListener(NotificationListener, NotificationFilter,
java.lang.Object)
setVerbose
public void setVerbose(boolean verbose)
Turns on or off the emission of additional information
when memory is allocated and deallocated. The format of the
output is left up to the virtual machine. This method
may be called by multiple threads concurrently, but there
is only one global setting of verbosity that is affected.
- setVerbose in interface MemoryMXBean
verbose - the new setting for verbose memory output.
SecurityException - if a security manager exists and
denies ManagementPermission("control").
MemoryMXBeanImpl.java - Implementation of a memory bean
Copyright (C) 2006 Free Software Foundation
This file is part of GNU Classpath.
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