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package jme3test.network;
import com.jme3.network.*;
import com.jme3.network.serializing.Serializable;
import com.jme3.network.serializing.Serializer;
import java.io.IOException;
public class TestLatency {
private static long startTime;
private static Client client;
private static MovingAverage average = new MovingAverage(100);
static {
startTime = System.currentTimeMillis();
}
private static long getTime(){
return System.currentTimeMillis() - startTime;
}
@Serializable
public static class TimestampMessage extends AbstractMessage {
long timeSent = 0;
long timeReceived = 0;
public TimestampMessage(){
setReliable(false);
}
public TimestampMessage(long timeSent, long timeReceived){
setReliable(false);
this.timeSent = timeSent;
this.timeReceived = timeReceived;
}
}
public static void main(String[] args) throws IOException, InterruptedException{
Serializer.registerClass(TimestampMessage.class);
Server server = Network.createServer(5110);
server.start();
client = Network.connectToServer("localhost", 5110);
client.start();
client.addMessageListener(new MessageListener<Client>(){
public void messageReceived(Client source, Message m) {
TimestampMessage timeMsg = (TimestampMessage) m;
long curTime = getTime();
//System.out.println("Time sent: " + timeMsg.timeSent);
//System.out.println("Time received by server: " + timeMsg.timeReceived);
//System.out.println("Time recieved by client: " + curTime);
long latency = (curTime - timeMsg.timeSent);
System.out.println("Latency: " + (latency) + " ms");
//long timeOffset = ((timeMsg.timeSent + curTime) / 2) - timeMsg.timeReceived;
//System.out.println("Approximate timeoffset: "+ (timeOffset) + " ms");
average.add(latency);
System.out.println("Average latency: " + average.getAverage());
long latencyOffset = latency - average.getAverage();
System.out.println("Latency offset: " + latencyOffset);
client.send(new TimestampMessage(getTime(), 0));
}
}, TimestampMessage.class);
server.addMessageListener(new MessageListener<HostedConnection>(){
public void messageReceived(HostedConnection source, Message m) {
TimestampMessage timeMsg = (TimestampMessage) m;
TimestampMessage outMsg = new TimestampMessage(timeMsg.timeSent, getTime());
source.send(outMsg);
}
}, TimestampMessage.class);
Thread.sleep(1);
client.send(new TimestampMessage(getTime(), 0));
Object obj = new Object();
synchronized(obj){
obj.wait();
}
}
}