org.abraracourcix.alipes.monitors
Class PollingMonitor

java.lang.Object
  org.abraracourcix.alipes.monitors.AbstractMonitor
      org.abraracourcix.alipes.monitors.PollingMonitor

All Implemented Interfaces:

Monitor, java.lang.Runnable

Direct Known Subclasses:

AbstractFileStateMonitor, URLMonitor

public abstract class PollingMonitor

extends AbstractMonitor

implements java.lang.Runnable

adds the threaded stuff required to do the polling of the resource Clients of subclasses need to call start() to kick off the class.

Author:

jdt

Constructor Summary

PollingMonitor(Listener listener, long pollingFrequency)
Constructor

Method Summary

long	getPollingFrequency() getter
abstract void	pole() For subclasses to implement.
void	run() Standard Thread run method
void	setPollingFrequency(long seconds) Setter
void	start() Start polling.

Methods inherited from class org.abraracourcix.alipes.monitors.AbstractMonitor

signalListener

Methods inherited from class java.lang.Object

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

Constructor Detail

PollingMonitor

public PollingMonitor(Listener listener,
                      long pollingFrequency)

Constructor

Parameters:

listener - who's listening to me?

pollingFrequency - in seconds

Method Detail

start

public final void start()

Start polling. Should be called after the class is created. Cannot stick this in the ctor, because it calls nonfinal methods (EJS rule #81) and has the potential to access partially constructed classes.

pole

public abstract void pole()

For subclasses to implement. Executed every pollingFrequency seconds.

setPollingFrequency

public final void setPollingFrequency(long seconds)

Setter

Parameters:

seconds - between polls

getPollingFrequency

public final long getPollingFrequency()

getter

Returns:

polling frequency in seconds

run

public final void run()

Standard Thread run method

Specified by:

run in interface java.lang.Runnable