SpigotCore_Main/src/de/steamwar/comms/BungeeReceiver.java

@@ -36,18 +36,14 @@ import java.util.UUID;
 
 public class BungeeReceiver implements PluginMessageListener {
 
-    private static Map<Integer, BungeeHandler> handlerMap = new HashMap<>();
+    private static Map<Byte, BungeeHandler> handlerMap = new HashMap<>();
 
-    public static void registerHandler(int code, BungeeHandler handler) {
+    public static void registerHandler(Byte code, BungeeHandler handler) {
         handlerMap.put(code, handler);
     }
 
-    public static void registerHandler(String name, BungeeHandler handler) {
-        handlerMap.put(name.hashCode(), handler);
-    }
-
     static {
-        registerHandler("PingHandler", byteArrayDataInput -> {
+        registerHandler(PacketIdManager.PING_PACKET, byteArrayDataInput -> {
             UUID uuid = SteamwarUser.get(byteArrayDataInput.readInt()).getUUID();
             if(Bukkit.getPlayer(uuid).isOnline()) {
                 Player player = Bukkit.getPlayer(uuid);
@@ -55,8 +51,8 @@ public class BungeeReceiver implements PluginMessageListener {
             }
 
         });
-        registerHandler("InventoryHandler", new InventoryHandler());
-        registerHandler("CloseInventory", byteArrayDataInput -> {
+        registerHandler(PacketIdManager.INVENTORY_PACKET, new InventoryHandler());
+        registerHandler(PacketIdManager.INVENTORY_CLOSE_PACKET, byteArrayDataInput -> {
             Player player = Bukkit.getPlayer(SteamwarUser.get(byteArrayDataInput.readInt()).getUUID());
             player.closeInventory();
         });
@@ -65,6 +61,7 @@ public class BungeeReceiver implements PluginMessageListener {
     @Override
     public void onPluginMessageReceived(String s, Player player, byte[] bytes) {
         ByteArrayDataInput in = ByteStreams.newDataInput(bytes);
-        handlerMap.get(in.readInt()).handle(in);
+        Byte handler = in.readByte();
+        handlerMap.get(handler).handle(in);
     }
 }

SpigotCore_Main/src/de/steamwar/comms/PacketIdManager.java

@@ -0,0 +1,11 @@
+package de.steamwar.comms;
+
+public class PacketIdManager {
+
+    //0x0(X) Standalone Packets
+    public final static byte PING_PACKET = 0x01;
+    //0x1(X) Bungee Inventory
+    public final static byte INVENTORY_PACKET = 0x10;
+    public final static byte INVENTORY_CALLBACK_PACKET = 0x11;
+    public final static byte INVENTORY_CLOSE_PACKET = 0x12;
+}

SpigotCore_Main/src/de/steamwar/comms/packets/InventoryCallbackPacket.java

@@ -20,25 +20,26 @@
 package de.steamwar.comms.packets;
 
 import com.google.common.io.ByteArrayDataOutput;
+import de.steamwar.comms.PacketIdManager;
 import org.bukkit.event.inventory.ClickType;
 
 public class InventoryCallbackPacket extends SpigotPacket {
 
-    int position;
+    int position = -1;
     ClickType clickType;
     CallbackType callbackType;
     int owner;
 
     @Override
     public int getName() {
-        return "InventoryCallback".hashCode();
+        return PacketIdManager.INVENTORY_CALLBACK_PACKET;
     }
 
     @Override
     public void writeVars(ByteArrayDataOutput byteArrayDataOutput) {
         byteArrayDataOutput.writeInt(owner);
         byteArrayDataOutput.writeUTF(callbackType.name());
-        if(position != 0){
+        if(position != -1){
             byteArrayDataOutput.writeInt(position);
             byteArrayDataOutput.writeUTF(clickType.name());
         }

SpigotCore_Main/src/de/steamwar/comms/packets/SpigotPacket.java

@@ -28,7 +28,7 @@ public abstract class SpigotPacket {
 
     public void send(Player player) {
         ByteArrayDataOutput out = ByteStreams.newDataOutput();
-        out.writeInt(getName());
+        out.writeByte(getName());
         writeVars(out);
         player.sendPluginMessage(Core.getInstance(), "sw:bridge", out.toByteArray());
     }