gov.sns.ca
Class Monitor

java.lang.Object
  |
  +--gov.sns.ca.Monitor

Direct Known Subclasses:

JcaMonitor

public abstract class Monitor

extends java.lang.Object

Monitor

Field Summary

static int	ALARM The monitor is triggered when the PV alarm state change.
static int	LOG The monitor is triggered when the PV log value change.
protected boolean	m_bolMonitoring
protected int	m_intMaskEvent
protected Channel	m_xalChan
static int	VALUE The monitor is triggered when the PV value change.

Constructor Summary

protected

Monitor(Channel chan, int intMaskEvent) Creates new Monitor

Method Summary

protected abstract void	begin() Start the channel monitoring
abstract void	clear() Stop the monitoring of PV
protected void	finalize() Make sure monitoring is shut down before destruction
Channel	getChannel() Return the associated Channel object
protected void	post(IEventSinkValStatus listener, StatusAdaptor adaptor) Post the value-status record to the listener.
protected void	post(IEventSinkValTime listener, TimeAdaptor adaptor) Post the value-status-timestamp record to the listener.
protected void	post(IEventSinkValue listener, ValueAdaptor adaptor) Post the value record to the listener.

Methods inherited from class java.lang.Object

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

Field Detail

VALUE

public static final int VALUE

The monitor is triggered when the PV value change.

See Also:

Constant Field Values

LOG

public static final int LOG

The monitor is triggered when the PV log value change.

See Also:

Constant Field Values

ALARM

public static final int ALARM

The monitor is triggered when the PV alarm state change.

See Also:

Constant Field Values

m_bolMonitoring

protected boolean m_bolMonitoring

m_intMaskEvent

protected int m_intMaskEvent

m_xalChan

protected Channel m_xalChan

Constructor Detail

Monitor

protected Monitor(Channel chan,
                  int intMaskEvent)
           throws ConnectionException

Creates new Monitor

Parameters:

chan - Channel object to monitor

intMaskEvent - code specifying when monitor event is fired

Throws:

ConnectionException - Channel is not connected

Method Detail

clear

public abstract void clear()

Stop the monitoring of PV

getChannel

public Channel getChannel()

Return the associated Channel object

Returns:

channel being monitored

begin

protected abstract void begin()
                       throws MonitorException

Start the channel monitoring

Throws:

MonitorException - unable to setup the channel access monitor

finalize

protected void finalize()

Make sure monitoring is shut down before destruction

Overrides:

finalize in class java.lang.Object

post

protected final void post(IEventSinkValue listener,
                          ValueAdaptor adaptor)

Post the value record to the listener.

Parameters:

listener - The object receiving the monitor record.

adaptor - The adaptor to the internal data record.

post

protected final void post(IEventSinkValStatus listener,
                          StatusAdaptor adaptor)

Post the value-status record to the listener.

Parameters:

listener - The object receiving the monitor record.

adaptor - The adaptor to the internal data record.

post

protected final void post(IEventSinkValTime listener,
                          TimeAdaptor adaptor)

Post the value-status-timestamp record to the listener.

Parameters:

listener - The object receiving the monitor record.

adaptor - The adaptor to the internal data record.