1 /* 2 * Copyright (c) 2009-2010 jMonkeyEngine 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 package jme3test.network; 34 35 import com.jme3.network.*; 36 import com.jme3.network.serializing.Serializable; 37 import com.jme3.network.serializing.Serializer; 38 import java.io.IOException; 39 40 public class TestLatency { 41 42 private static long startTime; 43 private static Client client; 44 private static MovingAverage average = new MovingAverage(100); 45 46 static { 47 startTime = System.currentTimeMillis(); 48 } 49 getTime()50 private static long getTime(){ 51 return System.currentTimeMillis() - startTime; 52 } 53 54 @Serializable 55 public static class TimestampMessage extends AbstractMessage { 56 57 long timeSent = 0; 58 long timeReceived = 0; 59 TimestampMessage()60 public TimestampMessage(){ 61 setReliable(false); 62 } 63 TimestampMessage(long timeSent, long timeReceived)64 public TimestampMessage(long timeSent, long timeReceived){ 65 setReliable(false); 66 this.timeSent = timeSent; 67 this.timeReceived = timeReceived; 68 } 69 70 } 71 main(String[] args)72 public static void main(String[] args) throws IOException, InterruptedException{ 73 Serializer.registerClass(TimestampMessage.class); 74 75 Server server = Network.createServer(5110); 76 server.start(); 77 78 client = Network.connectToServer("localhost", 5110); 79 client.start(); 80 81 client.addMessageListener(new MessageListener<Client>(){ 82 public void messageReceived(Client source, Message m) { 83 TimestampMessage timeMsg = (TimestampMessage) m; 84 85 long curTime = getTime(); 86 //System.out.println("Time sent: " + timeMsg.timeSent); 87 //System.out.println("Time received by server: " + timeMsg.timeReceived); 88 //System.out.println("Time recieved by client: " + curTime); 89 90 long latency = (curTime - timeMsg.timeSent); 91 System.out.println("Latency: " + (latency) + " ms"); 92 //long timeOffset = ((timeMsg.timeSent + curTime) / 2) - timeMsg.timeReceived; 93 //System.out.println("Approximate timeoffset: "+ (timeOffset) + " ms"); 94 95 average.add(latency); 96 System.out.println("Average latency: " + average.getAverage()); 97 98 long latencyOffset = latency - average.getAverage(); 99 System.out.println("Latency offset: " + latencyOffset); 100 101 client.send(new TimestampMessage(getTime(), 0)); 102 } 103 }, TimestampMessage.class); 104 105 server.addMessageListener(new MessageListener<HostedConnection>(){ 106 public void messageReceived(HostedConnection source, Message m) { 107 TimestampMessage timeMsg = (TimestampMessage) m; 108 TimestampMessage outMsg = new TimestampMessage(timeMsg.timeSent, getTime()); 109 source.send(outMsg); 110 } 111 }, TimestampMessage.class); 112 113 Thread.sleep(1); 114 115 client.send(new TimestampMessage(getTime(), 0)); 116 117 Object obj = new Object(); 118 synchronized(obj){ 119 obj.wait(); 120 } 121 } 122 123 } 124