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/*
* Copyright (c) 2010 Remko Tronçon
* Licensed under the GNU General Public License v3.
* See Documentation/Licenses/GPLv3.txt for more information.
*/
/*
* Copyright (c) 2010, Isode Limited, London, England.
* All rights reserved.
*/
package com.isode.stroke.network;
import java.util.Date;
import com.isode.stroke.eventloop.Event;
import com.isode.stroke.eventloop.EventLoop;
class JavaTimer extends Timer {
private class TimerRunnable implements Runnable {
boolean running_ = true;
private final EventLoop eventLoop_;
private final long milliseconds_;
public TimerRunnable(EventLoop eventLoop, long milliseconds) {
eventLoop_ = eventLoop;
milliseconds_ = milliseconds;
}
public void run() {
long endTime = new Date().getTime() + milliseconds_;
while (shouldEmit() && new Date().getTime() < endTime) {
try {
long timeToWait = endTime - new Date().getTime();
if (timeToWait > 0) {
Thread.sleep(milliseconds_);
}
} catch (InterruptedException ex) {
// Needs to be caught, but won't break out of the loop
// unless end time reached or stop() has been called.
}
}
if (shouldEmit()) {
eventLoop_.postEvent(new Event.Callback() {
public void run() {
onTick.emit();
}
});
}
}
synchronized boolean shouldEmit() {
return running_;
}
public synchronized void stop() {
running_ = false;
}
}
/**
* Create a new JavaTimer
* @param eventLoop the caller's EventLoop. Should not be null.
* @param milliseconds length of delay.
*/
public JavaTimer(EventLoop eventLoop, long milliseconds) {
timer_ = new TimerRunnable(eventLoop, milliseconds);
}
/**
* Start the timer running. The timer will expire and generate a signal
* after the specified delay, unless {@link #stop()} has been called.
*/
@Override
public void start() {
Thread thread = (new Thread(timer_));
thread.setDaemon(true);
thread.start();
}
/**
* Cancel the timer. No signal will be generated.
*/
@Override
public void stop() {
timer_.stop();
//FIXME: This needs to clear any remaining events out of the EventLoop queue.
}
@Override
public String toString() {
return "JavaTimer for " + timer_.milliseconds_ +
" milliseconds " +
(timer_.running_ ? "running" : "not running");
}
private final TimerRunnable timer_;
}
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