/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.cs.internal;
import com.db4o.cs.internal.messages.*;
import com.db4o.foundation.*;
import com.db4o.internal.*;
/**
* @exclude
*/
public class ClientHeartbeat implements Runnable {
private SimpleTimer _timer;
private final ClientObjectContainer _container;
public ClientHeartbeat(ClientObjectContainer container) {
_container = container;
_timer = new SimpleTimer(this, frequency(container.configImpl()));
}
private int frequency(Config4Impl config){
return Math.min(config.timeoutClientSocket(), config.timeoutServerSocket()) / 4;
}
public void run() {
_container.writeMessageToSocket(Msg.PING);
}
public void start(){
_container.threadPool().start("db4o client heartbeat", _timer);
}
public void stop() {
if (_timer == null){
return;
}
_timer.stop();
_timer = null;
}
}