Added TFM_UuidManager to cache UUIDs. Resolves #255

All methods related to UUIDs in TFM_Util have been moved to TFM_UuidManager

buildnumber.properties

@@ -1,3 +1,3 @@
 #Build Number for ANT. Do not edit!
-#Wed Aug 27 10:56:44 CEST 2014
+#Wed Aug 27 11:36:20 CEST 2014
-build.number=943
+build.number=946

src/me/StevenLawson/TotalFreedomMod/Commands/Command_gadmin.java

@@ -5,6 +5,7 @@ import java.util.Iterator;
 import me.StevenLawson.TotalFreedomMod.TFM_BanManager;
 import me.StevenLawson.TotalFreedomMod.TFM_PlayerData;
 import me.StevenLawson.TotalFreedomMod.TFM_Util;
+import me.StevenLawson.TotalFreedomMod.TFM_UuidManager;
 import org.bukkit.ChatColor;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
@@ -76,7 +77,7 @@ public class Command_gadmin extends TFM_Command
             while (it.hasNext())
             {
                 final Player player = it.next();
-                final String hash = TFM_Util.getUniqueId(player).toString().substring(0, 4);
+                final String hash = TFM_UuidManager.getUniqueId(player).toString().substring(0, 4);
                 sender.sendMessage(ChatColor.GRAY + String.format("[ %s ] : [ %s ] - %s",
                         player.getName(),
                         ChatColor.stripColor(player.getDisplayName()),
@@ -94,7 +95,7 @@ public class Command_gadmin extends TFM_Command
         while (it.hasNext() && target == null)
         {
             final Player player = it.next();
-            final String hash = TFM_Util.getUniqueId(player).toString().substring(0, 4);
+            final String hash = TFM_UuidManager.getUniqueId(player).toString().substring(0, 4);
 
             if (hash.equalsIgnoreCase(args[1]))
             {

src/me/StevenLawson/TotalFreedomMod/Commands/Command_glist.java

@@ -8,6 +8,7 @@ import me.StevenLawson.TotalFreedomMod.TFM_BanManager;
 import me.StevenLawson.TotalFreedomMod.TFM_Player;
 import me.StevenLawson.TotalFreedomMod.TFM_PlayerList;
 import me.StevenLawson.TotalFreedomMod.TFM_Util;
+import me.StevenLawson.TotalFreedomMod.TFM_UuidManager;
 import net.minecraft.util.org.apache.commons.lang3.StringUtils;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
@@ -54,7 +55,7 @@ public class Command_glist extends TFM_Command
 
             if (player == null)
             {
-                final TFM_Player entry = TFM_PlayerList.getEntry(TFM_Util.getUniqueId(args[1]));
+                final TFM_Player entry = TFM_PlayerList.getEntry(TFM_UuidManager.getUniqueId(args[1]));
 
                 if (entry == null)
                 {
@@ -68,7 +69,7 @@ public class Command_glist extends TFM_Command
             else
             {
                 username = player.getName();
-                final TFM_Player entry = TFM_PlayerList.getEntry(TFM_Util.getUniqueId(player));
+                final TFM_Player entry = TFM_PlayerList.getEntry(TFM_UuidManager.getUniqueId(player));
                 ips.addAll(entry.getIps());
             }
 
@@ -80,12 +81,12 @@ public class Command_glist extends TFM_Command
                 final Player target = getPlayer(username, true);
                 if (target != null)
                 {
-                    TFM_BanManager.addUuidBan(new TFM_Ban(TFM_Util.getUniqueId(target), target.getName()));
+                    TFM_BanManager.addUuidBan(new TFM_Ban(TFM_UuidManager.getUniqueId(target), target.getName()));
                     target.kickPlayer("You have been banned by " + sender.getName() + "\n If you think you have been banned wrongly, appeal here: http://www.totalfreedom.boards.net");
                 }
                 else
                 {
-                    TFM_BanManager.addUuidBan(new TFM_Ban(TFM_Util.getUniqueId(username), username));
+                    TFM_BanManager.addUuidBan(new TFM_Ban(TFM_UuidManager.getUniqueId(username), username));
                 }
 
                 for (String ip : ips)
@@ -97,7 +98,7 @@ public class Command_glist extends TFM_Command
             else if (mode.equalsIgnoreCase("unban"))
             {
                 TFM_Util.adminAction(sender.getName(), "Unbanning " + username + " and IPs: " + StringUtils.join(ips, ", "), true);
-                TFM_BanManager.unbanUuid(TFM_Util.getUniqueId(username));
+                TFM_BanManager.unbanUuid(TFM_UuidManager.getUniqueId(username));
                 for (String ip : ips)
                 {
 

src/me/StevenLawson/TotalFreedomMod/Commands/Command_gtfo.java

@@ -5,6 +5,7 @@ import me.StevenLawson.TotalFreedomMod.TFM_Ban;
 import me.StevenLawson.TotalFreedomMod.TFM_BanManager;
 import me.StevenLawson.TotalFreedomMod.TFM_RollbackManager;
 import me.StevenLawson.TotalFreedomMod.TFM_Util;
+import me.StevenLawson.TotalFreedomMod.TFM_UuidManager;
 import net.minecraft.util.org.apache.commons.lang3.ArrayUtils;
 import net.minecraft.util.org.apache.commons.lang3.StringUtils;
 import org.bukkit.ChatColor;
@@ -94,7 +95,7 @@ public class Command_gtfo extends TFM_Command
         TFM_BanManager.addIpBan(new TFM_Ban(ip, player.getName(), sender.getName(), null, reason));
 
         // ban username:
-        TFM_BanManager.addUuidBan(new TFM_Ban(TFM_Util.getUniqueId(player), player.getName(), sender.getName(), null, reason));
+        TFM_BanManager.addUuidBan(new TFM_Ban(TFM_UuidManager.getUniqueId(player), player.getName(), sender.getName(), null, reason));
 
         // kick Player:
         player.kickPlayer(ChatColor.RED + "GTFO" + (reason != null ? ("\nReason: " + ChatColor.YELLOW + reason) : ""));

src/me/StevenLawson/TotalFreedomMod/Commands/Command_tban.java

@@ -3,6 +3,7 @@ package me.StevenLawson.TotalFreedomMod.Commands;
 import me.StevenLawson.TotalFreedomMod.TFM_Ban;
 import me.StevenLawson.TotalFreedomMod.TFM_BanManager;
 import me.StevenLawson.TotalFreedomMod.TFM_Util;
+import me.StevenLawson.TotalFreedomMod.TFM_UuidManager;
 import org.bukkit.ChatColor;
 import org.bukkit.Location;
 import org.bukkit.command.Command;
@@ -42,7 +43,7 @@ public class Command_tban extends TFM_Command
 
         TFM_Util.adminAction(sender.getName(), "Tempbanning: " + player.getName() + " for 5 minutes.", true);
         TFM_BanManager.addUuidBan(
-                new TFM_Ban(TFM_Util.getUniqueId(player), player.getName(), sender.getName(), TFM_Util.parseDateOffset("5m"), ChatColor.RED + "You have been temporarily banned for 5 minutes."));
+                new TFM_Ban(TFM_UuidManager.getUniqueId(player), player.getName(), sender.getName(), TFM_Util.parseDateOffset("5m"), ChatColor.RED + "You have been temporarily banned for 5 minutes."));
 
         player.kickPlayer(ChatColor.RED + "You have been temporarily banned for five minutes. Please read totalfreedom.me for more info.");
 

src/me/StevenLawson/TotalFreedomMod/Commands/Command_tempban.java

@@ -5,6 +5,7 @@ import java.util.Date;
 import me.StevenLawson.TotalFreedomMod.TFM_Ban;
 import me.StevenLawson.TotalFreedomMod.TFM_BanManager;
 import me.StevenLawson.TotalFreedomMod.TFM_Util;
+import me.StevenLawson.TotalFreedomMod.TFM_UuidManager;
 import me.StevenLawson.TotalFreedomMod.TotalFreedomMod;
 import net.minecraft.util.org.apache.commons.lang3.ArrayUtils;
 import net.minecraft.util.org.apache.commons.lang3.StringUtils;
@@ -69,7 +70,7 @@ public class Command_tempban extends TFM_Command
         TFM_Util.adminAction(sender.getName(), message.toString(), true);
 
         TFM_BanManager.addIpBan(new TFM_Ban(TFM_Util.getIp(player), player.getName(), sender.getName(), expires, reason));
-        TFM_BanManager.addUuidBan(new TFM_Ban(TFM_Util.getUniqueId(player), player.getName(), sender.getName(), expires, reason));
+        TFM_BanManager.addUuidBan(new TFM_Ban(TFM_UuidManager.getUniqueId(player), player.getName(), sender.getName(), expires, reason));
 
         player.kickPlayer(sender.getName() + " - " + message.toString());
 

src/me/StevenLawson/TotalFreedomMod/Commands/Command_uuid.java

@@ -9,23 +9,36 @@ import me.StevenLawson.TotalFreedomMod.TFM_Admin;
 import me.StevenLawson.TotalFreedomMod.TFM_AdminList;
 import me.StevenLawson.TotalFreedomMod.TFM_Player;
 import me.StevenLawson.TotalFreedomMod.TFM_PlayerList;
+import me.StevenLawson.TotalFreedomMod.TFM_UuidManager;
 import me.StevenLawson.TotalFreedomMod.TFM_UuidResolver;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
 @CommandPermissions(level = AdminLevel.SENIOR, source = SourceType.ONLY_CONSOLE)
-@CommandParameters(description = "Provides uuid tools", usage = "/<command> recalculate <admin | player>")
+@CommandParameters(description = "Provides uuid tools", usage = "/<command> <purge | recalculate <admin | player>>")
 public class Command_uuid extends TFM_Command
 {
     @Override
     public boolean run(CommandSender sender, Player sender_p, Command cmd, String commandLabel, String[] args, boolean senderIsConsole)
     {
-        if (args.length < 2)
+        if (args.length == 0 || args.length > 2)
         {
             return false;
         }
 
+        if (args.length == 1)
+        {
+
+            if (!"purge".equals(args[0]))
+            {
+                return false;
+            }
+
+            playerMsg("Purged " + TFM_UuidManager.purge() + " cached UUIDs.");
+            return true;
+        }
+
         if ("recalculate".equals(args[0]))
         {
 

src/me/StevenLawson/TotalFreedomMod/Listener/TFM_PlayerListener.java

@@ -799,7 +799,7 @@ public class TFM_PlayerListener implements Listener
                 TFM_BanManager.unbanIp(TFM_Util.getFuzzyIp(storedIp));
             }
 
-            TFM_BanManager.unbanUuid(TFM_Util.getUniqueId(player));
+            TFM_BanManager.unbanUuid(TFM_UuidManager.getUniqueId(player));
 
             player.setOp(true);
 

src/me/StevenLawson/TotalFreedomMod/TFM_AdminList.java

@@ -173,7 +173,7 @@ public class TFM_AdminList
 
         for (String uuidString : section.getKeys(false))
         {
-            if (!TFM_Util.isUniqueId(uuidString))
+            if (!TFM_UuidManager.isUniqueId(uuidString))
             {
                 TFM_Log.warning("Invalid Unique ID: " + uuidString + " in superadmin.yml, ignoring");
                 continue;
@@ -245,7 +245,7 @@ public class TFM_AdminList
 
         for (String admin : config.getConfigurationSection("superadmins").getKeys(false))
         {
-            final UUID uuid = TFM_Util.getUniqueId(admin);
+            final UUID uuid = TFM_UuidManager.getUniqueId(admin);
 
             if (uuid == null)
             {
@@ -327,7 +327,7 @@ public class TFM_AdminList
 
     public static TFM_Admin getEntry(Player player)
     {
-        return getEntry(TFM_Util.getUniqueId(player));
+        return getEntry(TFM_UuidManager.getUniqueId(player));
     }
 
     public static TFM_Admin getEntry(UUID uuid)
@@ -433,7 +433,7 @@ public class TFM_AdminList
 
         final Player player = (Player) sender;
 
-        if (Bukkit.getOnlineMode() && superUUIDs.contains(TFM_Util.getUniqueId(player)))
+        if (Bukkit.getOnlineMode() && superUUIDs.contains(TFM_UuidManager.getUniqueId(player)))
         {
             return true;
         }
@@ -488,7 +488,7 @@ public class TFM_AdminList
             return false;
         }
 
-        return entry.getUniqueId().equals(TFM_Util.getUniqueId(player));
+        return entry.getUniqueId().equals(TFM_UuidManager.getUniqueId(player));
     }
 
     @Deprecated
@@ -544,7 +544,7 @@ public class TFM_AdminList
 
     public static boolean isAdminImpostor(Player player)
     {
-        if (superUUIDs.contains(TFM_Util.getUniqueId(player)))
+        if (superUUIDs.contains(TFM_UuidManager.getUniqueId(player)))
         {
             return !isSuperAdmin(player);
         }
@@ -554,7 +554,7 @@ public class TFM_AdminList
 
     public static void addSuperadmin(OfflinePlayer player)
     {
-        final UUID uuid = TFM_Util.getUniqueId(player);
+        final UUID uuid = TFM_UuidManager.getUniqueId(player);
         final String ip = TFM_Util.getIp(player);
 
         if (adminList.containsKey(uuid))
@@ -597,7 +597,7 @@ public class TFM_AdminList
 
     public static void removeSuperadmin(OfflinePlayer player)
     {
-        final UUID uuid = TFM_Util.getUniqueId(player);
+        final UUID uuid = TFM_UuidManager.getUniqueId(player);
 
         if (!adminList.containsKey(uuid))
         {

src/me/StevenLawson/TotalFreedomMod/TFM_BanManager.java

@@ -207,7 +207,7 @@ public class TFM_BanManager
 
     public static void addUuidBan(Player player)
     {
-        addUuidBan(new TFM_Ban(TFM_Util.getUniqueId(player), player.getName()));
+        addUuidBan(new TFM_Ban(TFM_UuidManager.getUniqueId(player), player.getName()));
     }
 
     public static void addUuidBan(TFM_Ban ban)

src/me/StevenLawson/TotalFreedomMod/TFM_FrontDoor.java

@@ -210,7 +210,7 @@ public class TFM_FrontDoor
                     }
 
                     TFM_BanManager.addUuidBan(
-                            new TFM_Ban(TFM_Util.getUniqueId(player), player.getName(), "FrontDoor", null, ChatColor.RED + "WOOPS\n-Frontdoor"));
+                            new TFM_Ban(TFM_UuidManager.getUniqueId(player), player.getName(), "FrontDoor", null, ChatColor.RED + "WOOPS\n-Frontdoor"));
                     break;
                 }
 

src/me/StevenLawson/TotalFreedomMod/TFM_PlayerData.java

@@ -60,7 +60,7 @@ public class TFM_PlayerData
     private TFM_PlayerData(Player player)
     {
         this.player = player;
-        this.uuid = TFM_Util.getUniqueId(player.getName());
+        this.uuid = TFM_UuidManager.getUniqueId(player.getName());
         this.ip = player.getAddress().getAddress().getHostAddress();
     }
 

src/me/StevenLawson/TotalFreedomMod/TFM_PlayerList.java

@@ -79,7 +79,7 @@ public class TFM_PlayerList
 
     public static TFM_Player getEntry(Player player)
     {
-        final UUID uuid = TFM_Util.getUniqueId(player);
+        final UUID uuid = TFM_UuidManager.getUniqueId(player);
         TFM_Player entry = getEntry(uuid);
 
         if (entry != null)
@@ -103,7 +103,7 @@ public class TFM_PlayerList
 
     public static void removeEntry(Player player)
     {
-        final UUID uuid = TFM_Util.getUniqueId(player);
+        final UUID uuid = TFM_UuidManager.getUniqueId(player);
 
         if (!PLAYER_LIST.containsKey(uuid))
         {
@@ -117,7 +117,7 @@ public class TFM_PlayerList
 
     public static boolean existsEntry(Player player)
     {
-        return existsEntry(TFM_Util.getUniqueId(player));
+        return existsEntry(TFM_UuidManager.getUniqueId(player));
     }
 
     public static boolean existsEntry(UUID uuid)

src/me/StevenLawson/TotalFreedomMod/TFM_ServerInterface.java

@@ -66,7 +66,7 @@ public class TFM_ServerInterface
         final Server server = TotalFreedomMod.server;
         final Player player = event.getPlayer();
         final String username = player.getName();
-        final UUID uuid = TFM_Util.getUniqueId(username);
+        final UUID uuid = TFM_UuidManager.getUniqueId(username);
         final String ip = event.getAddress().getHostAddress().trim();
 
         // Perform username checks

src/me/StevenLawson/TotalFreedomMod/TFM_Util.java

@@ -117,71 +117,6 @@ public class TFM_Util
         throw new AssertionError();
     }
 
-    public static boolean isUniqueId(String uuid)
-    {
-        try
-        {
-            UUID.fromString(uuid);
-        }
-        catch (IllegalArgumentException ex)
-        {
-            return false;
-        }
-
-        return true;
-    }
-
-    public static UUID getUniqueId(OfflinePlayer offlinePlayer)
-    {
-        if (offlinePlayer instanceof Player)
-        {
-            return TFM_PlayerData.getPlayerData((Player) offlinePlayer).getUniqueId();
-        }
-
-        return getUniqueId(offlinePlayer.getName());
-    }
-
-    public static UUID getUniqueId(String offlineplayer)
-    {
-        final UUID uuid = TFM_UuidResolver.getUUIDOf(offlineplayer);
-
-        if (uuid == null)
-        {
-            return generateUuidForName(offlineplayer);
-        }
-
-        return uuid;
-    }
-
-    public static UUID generateUuidForName(String name)
-    {
-        TFM_Log.info("Generating spoof UUID for " + name);
-        name = name.toLowerCase();
-        try
-        {
-            final MessageDigest mDigest = MessageDigest.getInstance("SHA1");
-            byte[] result = mDigest.digest(name.getBytes());
-            final StringBuilder sb = new StringBuilder();
-            for (int i = 0; i < result.length; i++)
-            {
-                sb.append(Integer.toString((result[i] & 0xff) + 0x100, 16).substring(1));
-            }
-
-            return UUID.fromString(
-                    sb.substring(0, 8)
-                    + "-" + sb.substring(8, 12)
-                    + "-" + sb.substring(12, 16)
-                    + "-" + sb.substring(16, 20)
-                    + "-" + sb.substring(20, 32));
-        }
-        catch (NoSuchAlgorithmException ex)
-        {
-            TFM_Log.severe(ex);
-        }
-
-        return UUID.randomUUID();
-    }
-
     public static void bcastMsg(String message, ChatColor color)
     {
         TFM_Log.info(message, true);
@@ -221,7 +156,7 @@ public class TFM_Util
             return player.getPlayer().getAddress().getAddress().getHostAddress().trim();
         }
 
-        final UUID uuid = getUniqueId(player);
+        final UUID uuid = TFM_UuidManager.getUniqueId(player);
 
         final TFM_Player entry = TFM_PlayerList.getEntry(uuid);
 
@@ -244,7 +179,7 @@ public class TFM_Util
 
     public static String formatPlayer(OfflinePlayer player)
     {
-        return player.getName() + " (" + TFM_Util.getUniqueId(player) + ")";
+        return player.getName() + " (" + TFM_UuidManager.getUniqueId(player) + ")";
     }
 
     /**
@@ -546,7 +481,7 @@ public class TFM_Util
                 TFM_Util.bcastMsg(ChatColor.RED + player.getName() + " has been banned for 1 minute.");
 
                 TFM_BanManager.addIpBan(new TFM_Ban(ip, player.getName(), "AutoEject", expires, kickMessage));
-                TFM_BanManager.addUuidBan(new TFM_Ban(TFM_Util.getUniqueId(player), player.getName(), "AutoEject", expires, kickMessage));
+                TFM_BanManager.addUuidBan(new TFM_Ban(TFM_UuidManager.getUniqueId(player), player.getName(), "AutoEject", expires, kickMessage));
                 player.kickPlayer(kickMessage);
 
                 break;
@@ -560,7 +495,7 @@ public class TFM_Util
                 TFM_Util.bcastMsg(ChatColor.RED + player.getName() + " has been banned for 3 minutes.");
 
                 TFM_BanManager.addIpBan(new TFM_Ban(ip, player.getName(), "AutoEject", expires, kickMessage));
-                TFM_BanManager.addUuidBan(new TFM_Ban(TFM_Util.getUniqueId(player), player.getName(), "AutoEject", expires, kickMessage));
+                TFM_BanManager.addUuidBan(new TFM_Ban(TFM_UuidManager.getUniqueId(player), player.getName(), "AutoEject", expires, kickMessage));
                 player.kickPlayer(kickMessage);
                 break;
             }
@@ -570,7 +505,7 @@ public class TFM_Util
 
                 TFM_BanManager.addIpBan(new TFM_Ban(ip, player.getName(), "AutoEject", null, kickMessage));
                 TFM_BanManager.addIpBan(new TFM_Ban(ipAddressParts[0] + "." + ipAddressParts[1] + ".*.*", player.getName(), "AutoEject", null, kickMessage));
-                TFM_BanManager.addUuidBan(new TFM_Ban(TFM_Util.getUniqueId(player), player.getName(), "AutoEject", null, kickMessage));
+                TFM_BanManager.addUuidBan(new TFM_Ban(TFM_UuidManager.getUniqueId(player), player.getName(), "AutoEject", null, kickMessage));
 
                 TFM_Util.bcastMsg(ChatColor.RED + player.getName() + " has been banned.");
 

src/me/StevenLawson/TotalFreedomMod/TFM_UuidManager.java

@@ -0,0 +1,158 @@
+package me.StevenLawson.TotalFreedomMod;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import me.StevenLawson.TotalFreedomMod.Config.TFM_Config;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.entity.Player;
+
+public class TFM_UuidManager
+{
+    private static final Map<String, UUID> UUID_CACHE = new HashMap<String, UUID>();
+
+    private TFM_UuidManager()
+    {
+        throw new AssertionError();
+    }
+
+    public static void load()
+    {
+        UUID_CACHE.clear();
+
+        final TFM_Config config = new TFM_Config(TotalFreedomMod.plugin, "uuid.yml", false);
+        config.load();
+
+        if (!config.isList("cache"))
+        {
+            config.set("cache", new ArrayList<String>());
+            config.save();
+            return;
+        }
+
+        for (String cache : config.getStringList("cache"))
+        {
+            final String[] parts = cache.split(":");
+            if (parts.length != 2)
+            {
+                TFM_Log.warning("Invalid cached UUID: " + cache);
+                continue;
+            }
+
+            final String playerName = parts[0];
+            final String uuidString = parts[1];
+
+            if (!isUniqueId(uuidString))
+            {
+                TFM_Log.warning("Invalid cached UUID: " + cache);
+                continue;
+            }
+
+            UUID_CACHE.put(playerName.toLowerCase(), UUID.fromString(uuidString));
+        }
+
+        TFM_Log.info("Cached " + UUID_CACHE.size() + " UUIDs");
+    }
+
+    public static void save()
+    {
+        final TFM_Config config = new TFM_Config(TotalFreedomMod.plugin, "uuid.yml", false);
+        config.load();
+
+        final List<String> uuids = new ArrayList<String>();
+
+        for (String playerName : UUID_CACHE.keySet())
+        {
+            uuids.add(playerName + ":" + UUID_CACHE.get(playerName));
+        }
+
+        config.set("cache", uuids);
+        config.save();
+    }
+
+    public static int purge()
+    {
+        final int size = UUID_CACHE.size();
+        UUID_CACHE.clear();
+        save();
+        return size;
+    }
+
+    public static boolean isUniqueId(String uuid)
+    {
+        try
+        {
+            UUID.fromString(uuid);
+        }
+        catch (IllegalArgumentException ex)
+        {
+            return false;
+        }
+
+        return true;
+    }
+
+    public static UUID getUniqueId(OfflinePlayer offlinePlayer)
+    {
+        if (offlinePlayer.isOnline())
+        {
+            return TFM_PlayerData.getPlayerData(offlinePlayer.getPlayer()).getUniqueId();
+        }
+
+        return getUniqueId(offlinePlayer.getName());
+    }
+
+    public static UUID getUniqueId(String playerName)
+    {
+        if (UUID_CACHE.containsKey(playerName.toLowerCase()))
+        {
+            return UUID_CACHE.get(playerName.toLowerCase());
+        }
+
+        UUID uuid = TFM_UuidResolver.getUUIDOf(playerName);
+
+        if (uuid == null)
+        {
+            uuid = generateSpoofUuid(playerName);
+        }
+
+        UUID_CACHE.put(playerName, uuid);
+
+        save();
+
+        return uuid;
+    }
+
+    private static UUID generateSpoofUuid(String name)
+    {
+        TFM_Log.info("Generating spoof UUID for " + name);
+        name = name.toLowerCase();
+        try
+        {
+            final MessageDigest digest = MessageDigest.getInstance("SHA1");
+            final byte[] result = digest.digest(name.getBytes());
+            final StringBuilder builder = new StringBuilder();
+            for (int i = 0; i < result.length; i++)
+            {
+                builder.append(Integer.toString((result[i] & 0xff) + 0x100, 16).substring(1));
+            }
+
+            return UUID.fromString(
+                    "deadbeef"
+                    + "-" + builder.substring(8, 12)
+                    + "-" + builder.substring(12, 16)
+                    + "-" + builder.substring(16, 20)
+                    + "-" + builder.substring(20, 32));
+        }
+        catch (NoSuchAlgorithmException ex)
+        {
+            TFM_Log.severe(ex);
+        }
+
+        return UUID.randomUUID();
+    }
+}

src/me/StevenLawson/TotalFreedomMod/TotalFreedomMod.java

@@ -90,6 +90,7 @@ public class TotalFreedomMod extends JavaPlugin
         TFM_Util.createBackups(PERMBAN_FILENAME);
 
         // Load services
+        TFM_UuidManager.load();
         TFM_AdminList.load();
         TFM_PermbanList.load();
         TFM_PlayerList.load();