sun.jvmstat.perfdata.monitor.protocol.file

Class MonitoredHostProvider

java.lang.Object

sun.jvmstat.monitor.MonitoredHost

sun.jvmstat.perfdata.monitor.protocol.file.MonitoredHostProvider

public class MonitoredHostProvider
extends MonitoredHost

Concrete implementation of the MonitoredHost interface for the file: protocol of the HotSpot PerfData monitoring implementation.

Since:

1.5

Author:

Brian Doherty

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_POLLING_INTERVAL The default polling interval.

Fields inherited from class sun.jvmstat.monitor.MonitoredHost

hostId, interval, lastException

Constructor Summary

Constructors

Constructor and Description
MonitoredHostProvider(HostIdentifier hostId) Create a MonitoredHostProvider instance using the given HostIdentifier.

Method Summary

Modifier and Type	Method and Description
Set<Integer>	activeVms() Return the current set of active Java Virtual Machines for this MonitoredHost.
void	addHostListener(HostListener listener) Add a HostListener.
void	detach(MonitoredVm vm) Detach from the indicated MonitoredVm.
MonitoredVm	getMonitoredVm(VmIdentifier vmid) Get the MonitoredVm for the given Java Virtual Machine.
MonitoredVm	getMonitoredVm(VmIdentifier vmid, int interval) Get the MonitoredVm for the given Java Virtual Machine.
void	removeHostListener(HostListener listener) Remove a HostListener.

Methods inherited from class sun.jvmstat.monitor.MonitoredHost

clearLastException, getHostIdentifier, getInterval, getLastException, getMonitoredHost, getMonitoredHost, getMonitoredHost, isErrored, resolveHostId, setInterval, setLastException

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_POLLING_INTERVAL

public static final int DEFAULT_POLLING_INTERVAL

The default polling interval. Not used by the file: protocol.

See Also:

Constant Field Values

Constructor Detail

MonitoredHostProvider

public MonitoredHostProvider(HostIdentifier hostId)

Create a MonitoredHostProvider instance using the given HostIdentifier.

Parameters:

hostId - the host identifier for this MonitoredHost

Method Detail

getMonitoredVm

public MonitoredVm getMonitoredVm(VmIdentifier vmid)
                           throws MonitorException

Get the MonitoredVm for the given Java Virtual Machine. The default sampling interval is used for the MonitoredVm instance.

Specified by:

getMonitoredVm in class MonitoredHost

Parameters:

vmid - the VmIdentifier specifying the target Java Virtual Machine.

Returns:

MonitoredVm - the MonitoredVm instance for the target Java Virtual Machine.

Throws:

MonitorException - Thrown if monitoring errors occur.

getMonitoredVm

public MonitoredVm getMonitoredVm(VmIdentifier vmid,
                                  int interval)
                           throws MonitorException

Get the MonitoredVm for the given Java Virtual Machine. The sampling interval is set to the given interval..

Note - the file: protocol silently ignores the interval parameter.

Specified by:

getMonitoredVm in class MonitoredHost

Parameters:

vmid - the VmIdentifier specifying the target Java Virtual Machine.

interval - the sampling interval for the target Java Virtual Machine.

Returns:

MonitoredVm - the MonitoredVm instance for the target Java Virtual Machine.

Throws:

MonitorException - Thrown if monitoring errors occur.

detach

public void detach(MonitoredVm vm)

Detach from the indicated MonitoredVm.

Specified by:

detach in class MonitoredHost

Parameters:

vm - the monitored Java Virtual Machine.

addHostListener

public void addHostListener(HostListener listener)

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

Note - the file: protocol currenly does not support registration or notification of event listeners. This method silently ignores the add request.

Specified by:

addHostListener in class MonitoredHost

Parameters:

listener - the HostListener to add.

removeHostListener

public void removeHostListener(HostListener listener)

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

Note - the file: protocol currenly does not support registration or notification of event listeners. This method silently ignores the remove request.

Specified by:

removeHostListener in class MonitoredHost

Parameters:

listener - the HostListener to add.

activeVms

public Set<Integer> activeVms()

Return the current set of active Java Virtual Machines for this MonitoredHost. The returned Set contains Integer instances holding the local virtual machine identifier, or lvmid for each instrumented Java Virtual Machine currently available..

Note - the file: protocol currently does not support the notion of tracking active or inactive Java Virtual Machines. This method currently returns an empty set.

Specified by:

activeVms in class MonitoredHost

Returns:

Set - the current set of active Java Virtual Machines associated with this MonitoredHost, or the empty set of none.