Added empty data sources, to be used by VisualiserRace.

Created FrameRateTracker which can be used to track framerate.
Updated RequestToJoinEnum and JoinAcceptanceEnum to match the agreed connection API.
Added AssignPlayerBoat message, which is used internally on the client to assign the player a source ID once they have connected.
Fixed some race conditions in the MessageRouter.
Updated ConnectionAcceptor.CheckClientConnection to wait slightly longer before removing connection (there was a slight race condition before).
Race no longer has a reference to LatestMessages. LatestMessages no longer has specific messages types in it.
Created RaceState class, which contains the state that is shared between VisualiserRaceState and MockRaceState (currently only used on visualiser).
Split VisualiserRace into VisualiserRaceState and VisualiserRaceService.
Added the VisualiserRace commands (BoatLocatonCommand, RaceStatusCommand, etc...).
Slightly increased the preferred width of race.fxml table columns.
issues #27 #37 #35
#story[1095]

racevisionGame/src/main/java/mock/app/ConnectionAcceptor.java

@@ -13,7 +13,12 @@ import java.net.InetAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
 import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.BlockingQueue;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -36,7 +41,7 @@ public class ConnectionAcceptor implements Runnable {
     /**
      * List of client connections.
      */
-    private ArrayBlockingQueue<ClientConnection> clientConnections = new ArrayBlockingQueue<>(16, true);
+    private BlockingQueue<ClientConnection> clientConnections = new ArrayBlockingQueue<>(16, true);
 
     /**
      * Snapshot of the race.
@@ -137,13 +142,13 @@ public class ConnectionAcceptor implements Runnable {
      */
     class CheckClientConnection implements Runnable{
 
-        private ArrayBlockingQueue<ClientConnection> connections;
+        private BlockingQueue<ClientConnection> connections;
 
         /**
          * Constructor
          * @param connections Clients "connected"
          */
-        public CheckClientConnection(ArrayBlockingQueue<ClientConnection> connections){
+        public CheckClientConnection(BlockingQueue<ClientConnection> connections){
             this.connections = connections;
         }
 
@@ -153,13 +158,29 @@ public class ConnectionAcceptor implements Runnable {
         @Override
         public void run() {
 
-            while(true) {
-                //System.out.println(connections.size());//used to see current amount of visualisers connected.
-                ArrayBlockingQueue<ClientConnection> clientConnections = new ArrayBlockingQueue<>(16, true, connections);
+            //We track the number of times each connection fails the !isAlive() test.
+            //This is to give a bit of lee-way in case the connection checker checks a connection before its thread has actually started.
+            Map<ClientConnection, Integer> connectionDeadCount = new HashMap<>();
+
+            while(!Thread.interrupted()) {
+
+                //Make copy of connections.
+                List<ClientConnection> clientConnections = new ArrayList<>(connections);
+
 
                 for (ClientConnection client : clientConnections) {
+
+                    connectionDeadCount.put(client, connectionDeadCount.getOrDefault(client, 0));
+
                     if (!client.isAlive()) {
+                        //Add one to fail count.
+                        connectionDeadCount.put(client, connectionDeadCount.get(client) + 1);
+                    }
+
+                    //We only remove them if they fail 5 times.
+                    if (connectionDeadCount.get(client) > 5) {
                         connections.remove(client);
+                        connectionDeadCount.remove(client);
                         client.terminate();
 
                         Logger.getGlobal().log(Level.WARNING, "CheckClientConnection is removing the dead connection: " + client);

racevisionGame/src/main/java/mock/app/Event.java

@@ -127,7 +127,6 @@ public class Event {
                         boatDataSource,
                         raceDataSource,
                         regattaDataSource,
-                        this.latestMessages,
                         this.boatPolars,
                         Constants.RaceTimeScale,
                         windGenerator   ),