gov.sns.jca
Class JcaMonitor

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

All Implemented Interfaces:

java.util.EventListener, gov.aps.jca.event.MonitorListener

public abstract class JcaMonitor

extends Monitor

implements gov.aps.jca.event.MonitorListener

Field Summary

protected gov.aps.jca.Channel	_jcaChannel
protected gov.aps.jca.Monitor	_jcaMonitor
protected int	_type

Fields inherited from class gov.sns.ca.Monitor

ALARM, LOG, m_bolMonitoring, m_intMaskEvent, m_xalChan, VALUE

Constructor Summary

protected

JcaMonitor(Channel chan, int type, int intMaskEvent) Creates new Monitor

Method Summary

protected void	begin() Start the channel monitoring
void	clear() Stop the monitoring of PV
abstract void	monitorChanged(gov.aps.jca.event.MonitorEvent event) Derived monitor objects must override this event hook.

Methods inherited from class gov.sns.ca.Monitor

finalize, getChannel, post, post, post

Methods inherited from class java.lang.Object

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

Field Detail

_type

protected int _type

_jcaChannel

protected gov.aps.jca.Channel _jcaChannel

_jcaMonitor

protected gov.aps.jca.Monitor _jcaMonitor

Constructor Detail

JcaMonitor

protected JcaMonitor(Channel chan,
                     int type,
                     int intMaskEvent)
              throws ConnectionException

Creates new Monitor

Parameters:

chan - Channel object to monitor

type - The type of data being monitored

Method Detail

monitorChanged

public abstract void monitorChanged(gov.aps.jca.event.MonitorEvent event)

Derived monitor objects must override this event hook. Derived class will catch the jca.MonitorEvent, convert to appropriate data type, and forward to the appropriate data sink interface (IEventSinkXxxXxx).

Specified by:

monitorChanged in interface gov.aps.jca.event.MonitorListener

clear

public void clear()

Stop the monitoring of PV

Specified by:

clear in class Monitor

begin

protected void begin()
              throws MonitorException

Start the channel monitoring

Specified by:

begin in class Monitor

Throws:

MonitorException - unable to setup the channel access monitor