attempt to implement an event model of Player movement

core/src/main/java/mc/core/GameLoop.java

@@ -4,8 +4,12 @@
  */
 package mc.core;
 
+import com.google.common.eventbus.Subscribe;
 import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
+import mc.core.events.EventBusGetter;
+import mc.core.events.CS_PlayerMoveEvent;
+import mc.core.events.SC_PlayerMoveEvent;
 import mc.core.player.PlayerManager;
 import mc.core.time.TimeProcessor;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -38,10 +42,22 @@ public class GameLoop extends Thread {
         TPS_WATCHER.setTraceTPS(value);
     }
 
+    @Subscribe
+    public void playerMoveEventHandler(CS_PlayerMoveEvent event) {
+        log.trace("(GameLoop) playerMoveEventHandler()");
+        event.getPlayer().getLocation().setXYZ(event.getNewLocation());
+
+        SC_PlayerMoveEvent nextEvent = new SC_PlayerMoveEvent(event.getPlayer());
+        nextEvent.setNewLocation(event.getNewLocation());
+        EventBusGetter.INSTANCE.post(nextEvent);
+    }
+
     @Override
     public void run() {
         TPS_WATCHER.startWatch();
 
+        EventBusGetter.INSTANCE.register(this);
+
         while (!isInterrupted()) {
             TPS_WATCHER.check();
 

core/src/main/java/mc/core/events/CS_PlayerMoveEvent.java

@@ -0,0 +1,22 @@
+/*
+ * DmitriyMX <dimon550@gmail.com>
+ * 2018-05-02
+ */
+package mc.core.events;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.Setter;
+import mc.core.EntityLocation;
+import mc.core.Location;
+import mc.core.player.Player;
+
+@RequiredArgsConstructor
+@Getter
+public class CS_PlayerMoveEvent extends EventBase {
+    private final Player player;
+    private final EntityLocation oldLocation; // TODO сомнительное решение
+    // вообще нужно будет создать реализацию "иммутабл локейшен" для подобных ситуаций
+    @Setter
+    private EntityLocation newLocation;
+}

core/src/main/java/mc/core/events/SC_PlayerMoveEvent.java

@@ -1,19 +1,15 @@
-/*
- * DmitriyMX <dimon550@gmail.com>
- * 2018-05-02
- */
 package mc.core.events;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 import lombok.Setter;
-import mc.core.Location;
+import mc.core.EntityLocation;
 import mc.core.player.Player;
 
 @RequiredArgsConstructor
 @Getter
-@Setter
-public class PlayerPositionEvent extends EventBase {
+public class SC_PlayerMoveEvent extends EventBase {
     private final Player player;
-    private Location newPosition;
+    @Setter
+    private EntityLocation newLocation;
 }

proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/PlayerPositionAndLookPacket.java

@@ -16,10 +16,11 @@ import mc.core.network.SCPacket;
 
 @NoArgsConstructor
 @Getter
-@Setter
 @ToString
 public class PlayerPositionAndLookPacket implements SCPacket, CSPacket {
+    @Setter
     private EntityLocation location;
+    @Setter
     private int teleportId;
     private boolean onGround = false;
 

proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/NettyServer.java

@@ -14,6 +14,7 @@ import io.netty.channel.socket.nio.NioServerSocketChannel;
 import io.netty.util.AttributeKey;
 import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
+import mc.core.events.EventBusGetter;
 import mc.core.network.Server;
 import mc.core.network.StartServerException;
 import mc.core.network.proto_1_12_2.State;
@@ -62,6 +63,9 @@ public class NettyServer implements Server {
     @Override
     public void start() throws StartServerException {
         log.info("Use protocol {}", StatusResponsePacket.NAME);
+
+        EventBusGetter.INSTANCE.register(new PlayerEventListener());
+
         bossGroup = new NioEventLoopGroup(1);
         workerGroup = new NioEventLoopGroup(workerGroupCount);
 

proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PlayerEventListener.java

@@ -0,0 +1,21 @@
+package mc.core.network.proto_1_12_2.netty;
+
+import com.google.common.eventbus.Subscribe;
+import lombok.extern.slf4j.Slf4j;
+import mc.core.events.SC_PlayerMoveEvent;
+import mc.core.network.proto_1_12_2.TeleportManager;
+import mc.core.network.proto_1_12_2.packets.PlayerPositionAndLookPacket;
+
+@Slf4j
+class PlayerEventListener {
+    @Subscribe
+    public void playerMoveEventHandler(SC_PlayerMoveEvent event) {
+        log.debug("(SC) playerMoveEventHandler()");
+        PlayerPositionAndLookPacket packet = new PlayerPositionAndLookPacket();
+        packet.setLocation(event.getNewLocation());
+        int tpId = TeleportManager.getInstance().append(event.getPlayer(), event.getNewLocation());
+        packet.setTeleportId(tpId);
+
+        event.getPlayer().getChannel().writeAndFlush(packet);
+    }
+}

proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/handlers/PlayHandler.java

@@ -5,7 +5,12 @@
 package mc.core.network.proto_1_12_2.netty.handlers;
 
 import io.netty.channel.Channel;
+import lombok.extern.slf4j.Slf4j;
+import mc.core.EntityLocation;
+import mc.core.Location;
 import mc.core.chat.ChatProcessor;
+import mc.core.events.EventBusGetter;
+import mc.core.events.CS_PlayerMoveEvent;
 import mc.core.network.proto_1_12_2.TeleportManager;
 import mc.core.network.proto_1_12_2.packets.*;
 import mc.core.player.Player;
@@ -14,6 +19,7 @@ import org.springframework.stereotype.Component;
 
 import static mc.core.network.proto_1_12_2.netty.NettyServer.ATTR_PLAYER;
 
+@Slf4j
 @Component
 public class PlayHandler extends AbstractStateHandler implements PlayStateHandler {
     @Autowired
@@ -63,8 +69,23 @@ public class PlayHandler extends AbstractStateHandler implements PlayStateHandle
 
     @Handler
     public void onPlayerMove(Channel channel, PlayerPositionPacket packet) {
+        log.debug("(Netty) onPlayerMove()");
         Player player = channel.attr(ATTR_PLAYER).get();
-        player.getLocation().setXYZ(packet.getX(), packet.getY(), packet.getZ());
+
+        if (player.getLocation().getX() == packet.getX() &&
+                player.getLocation().getY() == packet.getY() &&
+                player.getLocation().getZ() == packet.getZ()) {
+            return;
+        }
+
+        CS_PlayerMoveEvent event = new CS_PlayerMoveEvent(player, player.getLocation().clone());
+        event.setNewLocation(new EntityLocation(
+                packet.getX(), packet.getY(), packet.getZ(),
+                player.getLocation().getYaw(),
+                player.getLocation().getPitch(),
+                null
+        ));
+        EventBusGetter.INSTANCE.post(event);
     }
 
     @Handler