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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) 2011-2016, Isode Limited, London, England.
* All rights reserved.
*/
package com.isode.stroke.streamstack;
import java.util.logging.Logger;
import com.isode.stroke.base.SafeByteArray;
import com.isode.stroke.network.Timer;
import com.isode.stroke.network.TimerFactory;
import com.isode.stroke.signals.SignalConnection;
import com.isode.stroke.signals.Slot;
public class WhitespacePingLayer extends StreamLayer {
private static final int TIMEOUT_MILLISECONDS = 60000;
private final Logger logger = Logger.getLogger(this.getClass().getName());
public WhitespacePingLayer(TimerFactory timerFactory) {
isActive = false;
timer = timerFactory.createTimer(TIMEOUT_MILLISECONDS);
onTickConnection = timer.onTick.connect(new Slot() {
public void call() {
handleTimerTick();
}
});
}
@Override
protected void finalize() throws Throwable {
try {
destroy();
}
finally {
super.finalize();
}
}
/**
* This replaces the C++ destructor. After calling this object should not be used again.
* If any methods are called after they may throw {@link NullPointerException}
*/
public void destroy() {
if (isActive && timer != null) {
logger.finer("WhitespacePingLayer still active at destruction");
timer.stop();
}
onTickConnection.disconnect();
timer = null;
isActive = false;
}
public void writeData(SafeByteArray data) {
writeDataToChildLayer(data);
}
public void handleDataRead(SafeByteArray data) {
writeDataToParentLayer(data);
}
private void handleTimerTick() {
if (timer == null) {
return;
}
timer.stop();
writeDataToChildLayer(new SafeByteArray(" "));
timer.start();
}
public void setActive() {
isActive = true;
timer.start();
}
public void setInactive() {
timer.stop();
isActive = false;
}
public boolean getIsActive() {
return isActive;
}
private boolean isActive;
private Timer timer;
private final SignalConnection onTickConnection;
}
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