maplookup.patch

From 2dda94416930a1f2565127a51a5c53ac137e6f1e Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 23 Aug 2014 15:11:40 -0400
Subject: [PATCH] Improvements to Player Lookup

Minecraft and CraftBukkit both use Arrays to store online players,
and any time a player needs to be looked up by name the system iterates
all online players and does a name comparison.

This is very ineffecient and can reduce performance on servers with high player count.

By using a map based approach for player lookups, player lookup should
be consistent in performance regardless of how many players are online.

diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index ab1d9a5..f49ebce 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -49,6 +49,31 @@ public abstract class PlayerList {
     private static final SimpleDateFormat g = new SimpleDateFormat("yyyy-MM-dd \'at\' HH:mm:ss z");
     private final MinecraftServer server;
     public final List<EntityPlayer> players = new java.util.concurrent.CopyOnWriteArrayList(); // CraftBukkit - ArrayList -> CopyOnWriteArrayList: Iterator safety
+    // Spigot start
+    public final Map<String, EntityPlayer> playerMap = new java.util.HashMap<String, EntityPlayer>() {
+        @Override
+        public EntityPlayer put(String key, EntityPlayer value) {
+            return super.put(key.toLowerCase(), value);
+        }
+
+        @Override
+        public EntityPlayer get(Object key) {
+            // put the .playerConnection check done in other places here
+            EntityPlayer player = super.get(key instanceof String ? ((String)key).toLowerCase() : key);
+            return (player != null && player.playerConnection != null) ? player : null;
+        }
+
+        @Override
+        public boolean containsKey(Object key) {
+            return super.containsKey(key instanceof String ? ((String)key).toLowerCase() : key);
+        }
+
+        @Override
+        public EntityPlayer remove(Object key) {
+            return super.remove(key instanceof String ? ((String)key).toLowerCase() : key);
+        }
+    };
+    // Spigot end
     private final Map<UUID, EntityPlayer> j = Maps.newHashMap();
     private final GameProfileBanList k;
     private final IpBanList l;
@@ -289,6 +314,7 @@ public abstract class PlayerList {
         this.players.add(entityplayer);
         this.j.put(entityplayer.getUniqueID(), entityplayer);
         // this.sendAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, new EntityPlayer[] { entityplayer})); // CraftBukkit - replaced with loop below
+        this.playerMap.put(entityplayer.getName(), entityplayer); // Spigot
         WorldServer worldserver = this.server.getWorldServer(entityplayer.dimension);
 
         // CraftBukkit start
@@ -358,6 +384,7 @@ public abstract class PlayerList {
         worldserver.kill(entityplayer);
         worldserver.getPlayerChunkMap().removePlayer(entityplayer);
         this.players.remove(entityplayer);
+        this.playerMap.remove(entityplayer.getName()); // Spigot
         UUID uuid = entityplayer.getUniqueID();
         EntityPlayer entityplayer1 = (EntityPlayer) this.j.get(uuid);
 
@@ -393,8 +420,11 @@ public abstract class PlayerList {
         UUID uuid = EntityHuman.a(gameprofile);
         ArrayList arraylist = Lists.newArrayList();
 
-        EntityPlayer entityplayer;
-
+        // Spigot start
+        EntityPlayer entityplayer = a(uuid); // PAIL Rename getPlayer
+        if (entityplayer != null) {
+        /*
+        // Spigot end
         for (int i = 0; i < this.players.size(); ++i) {
             entityplayer = (EntityPlayer) this.players.get(i);
             if (entityplayer.getUniqueID().equals(uuid)) {
@@ -405,7 +435,7 @@ public abstract class PlayerList {
         Iterator iterator = arraylist.iterator();
 
         while (iterator.hasNext()) {
-            entityplayer = (EntityPlayer) iterator.next();
+            entityplayer = (EntityPlayer) iterator.next();*/ // Spigot
             savePlayerFile(entityplayer); // CraftBukkit - Force the player's inventory to be saved
             entityplayer.playerConnection.disconnect("You logged in from another location");
         }
@@ -1020,6 +1050,7 @@ public abstract class PlayerList {
     }
 
     public EntityPlayer getPlayer(String s) {
+        if (true) { return playerMap.get(s); } // Spigot
         Iterator iterator = this.players.iterator();
 
         EntityPlayer entityplayer;
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
index 8be0698..1bc684f 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java
@@ -144,14 +144,7 @@ public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializa
     }
 
     public Player getPlayer() {
-        for (Object obj : server.getHandle().players) {
-            EntityPlayer player = (EntityPlayer) obj;
-            if (player.getUniqueID().equals(getUniqueId())) {
-                return (player.playerConnection != null) ? player.playerConnection.getPlayer() : null;
-            }
-        }
-
-        return null;
+        return Bukkit.getServer().getPlayer(getUniqueId()); // Spigot - replace whole method
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index fd41124..54b81e9 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -401,7 +401,13 @@ public final class CraftServer implements Server {
     public Player getPlayer(final String name) {
         Validate.notNull(name, "Name cannot be null");
 
-        Player found = null;
+        // Spigot start
+        Player found = getPlayerExact(name);
+        if (found != null) {
+            return found;
+        }
+        // Spigot end
+
         String lowerName = name.toLowerCase();
         int delta = Integer.MAX_VALUE;
         for (Player player : getOnlinePlayers()) {
@@ -420,22 +426,15 @@ public final class CraftServer implements Server {
     @Override
     @Deprecated
     public Player getPlayerExact(String name) {
-        Validate.notNull(name, "Name cannot be null");
-
-        String lname = name.toLowerCase();
-
-        for (Player player : getOnlinePlayers()) {
-            if (player.getName().equalsIgnoreCase(lname)) {
-                return player;
-            }
-        }
-
-        return null;
+        // Spigot start - replace whole method
+        EntityPlayer player = playerList.playerMap.get(name);
+        return player != null ? player.getBukkitEntity() : null;
+        // Spigot end
     }
 
     @Override
     public Player getPlayer(UUID id) {
-        EntityPlayer player = playerList.a(id);
+        EntityPlayer player = playerList.a(id); // PAIL Rename getPlayer
 
         if (player != null) {
             return player.getBukkitEntity();
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 3162541..dba91c2 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -105,13 +105,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     }
 
     public boolean isOnline() {
-        for (Object obj : server.getHandle().players) {
-            EntityPlayer player = (EntityPlayer) obj;
-            if (player.getName().equalsIgnoreCase(getName())) {
-                return true;
-            }
-        }
-        return false;
+        return server.getPlayer(getUniqueId()) != null; // Spigot  - replace whole method
     }
 
     public InetSocketAddress getAddress() {
-- 
1.9.1