gov.sns.ca
Class PendDaemon

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

All Implemented Interfaces:

java.lang.Runnable

public class PendDaemon

extends java.lang.Object

implements java.lang.Runnable

This class maintains a single instance of a daemon thread that continually polls channel access. This is primarily useful for process variable monitors where channel access needs to be polled to catch incoming events. Since there need only be only daemon running to do this for any number of monitors PendDaemon maintains a reference count on the number of processes requesting polling. Any process desiring polling should call the static start() method; once polling is not longer needed the process must then call the release() method, which decrements the reference count.

Field Summary

static double	s_dblDefDurPoll
static long	s_lngDefInterval

Method Summary

static void	release() Remove dependency reference and terminate daemon if final reference
void	run() Periodically poll channel access until run flag clears
static void	setInterval(long lngInterval) Set the interval between channel access polling (PendEvent)
static void	start() Start the polling daemon and/or add a dependency reference

Methods inherited from class java.lang.Object

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

Field Detail

s_lngDefInterval

public static long s_lngDefInterval

s_dblDefDurPoll

public static double s_dblDefDurPoll

Method Detail

start

public static void start()

Start the polling daemon and/or add a dependency reference

release

public static void release()

Remove dependency reference and terminate daemon if final reference

setInterval

public static void setInterval(long lngInterval)

Set the interval between channel access polling (PendEvent)

Parameters:

lngInterval - polling interval in milliseconds

run

public void run()

Periodically poll channel access until run flag clears

Specified by:

run in interface java.lang.Runnable