1 files changed, 123 insertions, 0 deletions
diff --git a/engine/src/test/jme3test/network/TestLatency.java b/engine/src/test/jme3test/network/TestLatency.java
new file mode 100644
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+++ b/engine/src/test/jme3test/network/TestLatency.java
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+/*
+ * Copyright (c) 2009-2010 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+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();
+        }
+    }
+
+}