Update the player instance on login (LOWEST), not HIGHEST.

Should ensure that packet listeners recieve the most up-to-date player
instance, regardless of whether or not the main thread is blocked in the
player listener. No more temporary players.

ProtocolLib/src/main/java/com/comphenix/protocol/injector/PacketFilterManager.java

@@ -696,6 +696,7 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
 		try {
 			// Let's clean up the other injection first.
 			playerInjection.uninjectPlayer(event.getPlayer().getAddress());
+			playerInjection.updatePlayer(event.getPlayer());
 		} catch (Exception e) {
 			reporter.reportDetailed(PacketFilterManager.this, "Unable to uninject net handler for player.", e, event);
 		}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/PlayerInjectionHandler.java

@@ -129,6 +129,12 @@ public interface PlayerInjectionHandler {
 	public abstract void recieveClientPacket(Player player, Object mcPacket)
 			throws IllegalAccessException, InvocationTargetException;
 
+	/**
+	 * Ensure that packet readers are informed of this player reference.
+	 * @param player - the player to update.
+	 */
+	public abstract void updatePlayer(Player player);
+	
 	/**
 	 * Determine if the given listeners are valid.
 	 * @param version - the current Minecraft version, or NULL if unknown.

ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/PlayerInjector.java

@@ -642,10 +642,7 @@ abstract class PlayerInjector implements SocketInjector {
 		// Do nothing
 	}
 	
-	/**
-	 * Set the real Bukkit player that we will use.
-	 * @param updatedPlayer - the real Bukkit player.
-	 */
+	@Override
 	public void setUpdatedPlayer(Player updatedPlayer) {
 		this.updatedPlayer = updatedPlayer;
 	}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/player/ProxyPlayerInjectionHandler.java

@@ -42,6 +42,7 @@ import com.comphenix.protocol.injector.ListenerInvoker;
 import com.comphenix.protocol.injector.PlayerLoggedOutException;
 import com.comphenix.protocol.injector.PacketFilterManager.PlayerInjectHooks;
 import com.comphenix.protocol.injector.server.AbstractInputStreamLookup;
+import com.comphenix.protocol.injector.server.BukkitSocketInjector;
 import com.comphenix.protocol.injector.server.InputStreamLookupBuilder;
 import com.comphenix.protocol.injector.server.SocketInjector;
 import com.comphenix.protocol.utility.MinecraftReflection;
@@ -416,6 +417,18 @@ class ProxyPlayerInjectionHandler implements PlayerInjectionHandler {
 		}
 	}
 	
+	@Override
+	public void updatePlayer(Player player) {
+		SocketInjector injector = inputStreamLookup.peekSocketInjector(player.getAddress());
+		
+		if (injector != null) {
+			injector.setUpdatedPlayer(player);
+		} else {
+			inputStreamLookup.setSocketInjector(player.getAddress(), 
+					new BukkitSocketInjector(player));
+		}
+	}
+	
 	/**
 	 * Unregisters the given player.
 	 * @param player - player to unregister.

ProtocolLib/src/main/java/com/comphenix/protocol/injector/server/BukkitSocketInjector.java

@@ -0,0 +1,103 @@
+package com.comphenix.protocol.injector.server;
+
+import java.lang.reflect.InvocationTargetException;
+import java.net.Socket;
+import java.net.SocketAddress;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.bukkit.entity.Player;
+
+public class BukkitSocketInjector implements SocketInjector {
+	/**
+	 * Represents a single send packet command.
+	 * @author Kristian
+	 */
+	static class SendPacketCommand {
+		private final Object packet;
+		private final boolean filtered;
+		
+		public SendPacketCommand(Object packet, boolean filtered) {
+			this.packet = packet;
+			this.filtered = filtered;
+		}
+
+		public Object getPacket() {
+			return packet;
+		}
+
+		public boolean isFiltered() {
+			return filtered;
+		}
+	}
+	
+	private Player player;
+	
+	// Queue of server packets
+	private List<SendPacketCommand> syncronizedQueue = Collections.synchronizedList(new ArrayList<SendPacketCommand>());
+	
+	/**
+	 * Represents a temporary socket injector.
+	 * @param temporaryPlayer - 
+	 */
+	public BukkitSocketInjector(Player player) {
+		if (player == null)
+			throw new IllegalArgumentException("Player cannot be NULL.");
+		this.player = player;
+	}
+
+	@Override
+	public Socket getSocket() throws IllegalAccessException {
+		throw new UnsupportedOperationException("Cannot get socket from Bukkit player.");
+	}
+
+	@Override
+	public SocketAddress getAddress() throws IllegalAccessException {
+		return player.getAddress();
+	}
+
+	@Override
+	public void disconnect(String message) throws InvocationTargetException {
+		player.kickPlayer(message);
+	}
+
+	@Override
+	public void sendServerPacket(Object packet, boolean filtered)
+			throws InvocationTargetException {
+		SendPacketCommand command = new SendPacketCommand(packet, filtered);
+		
+		// Queue until we can find something better
+		syncronizedQueue.add(command);
+	}
+	
+	@Override
+	public Player getPlayer() {
+		return player;
+	}
+
+	@Override
+	public Player getUpdatedPlayer() {
+		return player;
+	}
+
+	@Override
+	public void transferState(SocketInjector delegate) {
+		// Transmit all queued packets to a different injector.
+		try {
+			synchronized(syncronizedQueue) {
+			    for (SendPacketCommand command : syncronizedQueue) {
+					delegate.sendServerPacket(command.getPacket(), command.isFiltered());
+			    }
+			    syncronizedQueue.clear();
+			}
+		} catch (InvocationTargetException e) {
+			throw new RuntimeException("Unable to transmit packets to " + delegate + " from old injector.", e);
+		}
+	}
+
+	@Override
+	public void setUpdatedPlayer(Player updatedPlayer) {
+		this.player = updatedPlayer;
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/server/SocketInjector.java

@@ -58,4 +58,10 @@ public interface SocketInjector {
 	 * @param delegate - the new injector.
 	 */
 	public abstract void transferState(SocketInjector delegate);
+
+	/**
+	 * Set the real Bukkit player that we will use.
+	 * @param updatedPlayer - the real Bukkit player.
+	 */
+	public abstract void setUpdatedPlayer(Player updatedPlayer);
 }

ProtocolLib/src/main/java/com/comphenix/protocol/injector/spigot/DummyPlayerHandler.java

@@ -119,4 +119,9 @@ class DummyPlayerHandler implements PlayerInjectionHandler {
 	public void postWorldLoaded() {
 		// Do nothing
 	}
+
+	@Override
+	public void updatePlayer(Player player) {
+		// Do nothing
+	}
 }