Started work on using data-lock for database queries

src/main/java/com/alttd/events/LoginEvent.java

@@ -17,6 +17,7 @@ public class LoginEvent implements Listener {
     @EventHandler
     public void onPlayerJoin(PlayerJoinEvent event) {
         final Player player = event.getPlayer();
+        //TODO lock user
         new BukkitRunnable() {
             @Override
             public void run() {

src/main/java/com/alttd/events/PluginMessageListener.java

@@ -0,0 +1,22 @@
+package com.alttd.events;
+
+import com.alttd.util.Logger;
+import com.google.common.io.ByteArrayDataInput;
+import com.google.common.io.ByteStreams;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+public class PluginMessageListener implements org.bukkit.plugin.messaging.PluginMessageListener {
+
+    @Override
+    public void onPluginMessageReceived(@NotNull String channel, @NotNull Player player, @NotNull byte[] bytes) {
+        if (!channel.equals("VillagerUI:player-data")) {
+            Logger.warning("Received plugin message on invalid channel");
+            return;
+        }
+        ByteArrayDataInput in = ByteStreams.newDataInput(bytes);
+        switch (in.readUTF()) {
+
+        }
+    }
+}

src/main/java/com/alttd/events/VillagerEvents.java

@@ -7,7 +7,10 @@ import com.alttd.config.VillagerConfig;
 import com.alttd.objects.EconUser;
 import com.alttd.objects.LoadedVillagers;
 import com.alttd.objects.VillagerType;
+import com.alttd.util.Utilities;
+import jdk.jshell.execution.Util;
 import org.bukkit.entity.EntityType;
+import org.bukkit.entity.Player;
 import org.bukkit.entity.Villager;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
@@ -31,19 +34,25 @@ public class VillagerEvents implements Listener {
         if (loadedVillager == null)
             return;
 
+        Player player = event.getPlayer();
         event.setCancelled(true);
-        if (!event.getPlayer().hasPermission(loadedVillager.getPermission())) {
-            event.getPlayer().sendMiniMessage(Config.NO_PERMISSION, null); //TODO more specific message?
+        if (!player.hasPermission(loadedVillager.getPermission())) {
+            player.sendMiniMessage(Config.NO_PERMISSION, null); //TODO more specific message?
+            return;
+        }
+        EconUser user = EconUser.getUser(player.getUniqueId());
+        if (user == null) {
+            Utilities.econSyncingMessage(player);
             return;
         }
         new BukkitRunnable() {
             @Override
             public void run() {
-                OpenGUI openGUI = new OpenGUI(loadedVillager, EconUser.getUser(event.getPlayer().getUniqueId()));
+                OpenGUI openGUI = new OpenGUI(loadedVillager, user);
                 new BukkitRunnable() {
                     @Override
                     public void run() {
-                        openGUI.open(event.getPlayer());
+                        openGUI.open(player);
                     }
                 }.runTask(VillagerUI.getInstance());
             }