sun.jvmstat.perfdata.monitor.protocol.local

Class LocalMonitoredVm

java.lang.Object

sun.jvmstat.perfdata.monitor.AbstractMonitoredVm

sun.jvmstat.perfdata.monitor.protocol.local.LocalMonitoredVm

All Implemented Interfaces:

MonitoredVm, BufferedMonitoredVm

public class LocalMonitoredVm
extends AbstractMonitoredVm

Concrete implementation of the AbstractMonitoredVm class for the local: protocol for the HotSpot PerfData monitoring implementation.

This class provides the ability to attach to the instrumentation buffer of a live target Java Virtual Machine through a HotSpot specific attach mechanism.

Since:

1.5

Author:

Brian Doherty

Field Summary

Fields inherited from class sun.jvmstat.perfdata.monitor.AbstractMonitoredVm

interval, pdb, vmid

Constructor Summary

Constructors

Constructor and Description
LocalMonitoredVm(VmIdentifier vmid, int interval) Create a LocalMonitoredVm instance.

Method Summary

Modifier and Type	Method and Description
void	addVmListener(VmListener l) Add a VmListener.
void	detach() Detach from target Java Virtual Machine.
void	removeVmListener(VmListener l) Remove a VmListener.
void	setInterval(int newInterval) Set the polling interval to interval milliseconds.

Methods inherited from class sun.jvmstat.perfdata.monitor.AbstractMonitoredVm

clearLastException, findByName, findByPattern, getBytes, getCapacity, getInterval, getLastException, getMonitorStatus, getVmIdentifier, isErrored, setLastException

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalMonitoredVm

public LocalMonitoredVm(VmIdentifier vmid,
                        int interval)
                 throws MonitorException

Create a LocalMonitoredVm instance.

Parameters:

vmid - the vm identifier specifying the target JVM

interval - the sampling interval

Throws:

MonitorException

Method Detail

detach

public void detach()

Detach from target Java Virtual Machine. After calling this method, updates of the instrumentation data values may be halted. All event notifications are halted. Further interactions with this object should be avoided..

Specified by:

detach in interface MonitoredVm

Overrides:

detach in class AbstractMonitoredVm

addVmListener

public void addVmListener(VmListener l)

Add a VmListener. The given listener is added to the list of VmListener objects to be notified of MonitoredVm related events..

Specified by:

addVmListener in interface MonitoredVm

Specified by:

addVmListener in class AbstractMonitoredVm

Parameters:

l - the VmListener to add.

removeVmListener

public void removeVmListener(VmListener l)

Remove a VmListener. The given listener is removed from the list of VmListener objects to be notified of MonitoredVm related events..

Specified by:

removeVmListener in interface MonitoredVm

Specified by:

removeVmListener in class AbstractMonitoredVm

Parameters:

l - the VmListener to be removed.

setInterval

public void setInterval(int newInterval)

Set the polling interval to interval milliseconds. Polling based monitoring implementations need to refresh the instrumentation data on a periodic basis. This interface allows the interval to override the implementation specific default interval..

Specified by:

setInterval in interface MonitoredVm

Overrides:

setInterval in class AbstractMonitoredVm

Parameters:

newInterval - the polling interval in milliseconds