Shut down the game server when Grasscutter is about to shut down

src/main/java/emu/grasscutter/Grasscutter.java

@@ -1,8 +1,5 @@
 package emu.grasscutter;
 
-import static emu.grasscutter.config.Configuration.SERVER;
-import static emu.grasscutter.utils.lang.Language.translate;
-
 import ch.qos.logback.classic.*;
 import emu.grasscutter.auth.*;
 import emu.grasscutter.command.*;
@@ -21,16 +18,20 @@ import emu.grasscutter.tools.Tools;
 import emu.grasscutter.utils.*;
 import emu.grasscutter.utils.lang.Language;
 import io.netty.util.concurrent.FastThreadLocalThread;
-import java.io.*;
-import java.util.Calendar;
-import java.util.concurrent.*;
-import javax.annotation.Nullable;
 import lombok.*;
 import org.jline.reader.*;
 import org.jline.terminal.*;
 import org.reflections.Reflections;
 import org.slf4j.LoggerFactory;
 
+import javax.annotation.Nullable;
+import java.io.*;
+import java.util.Calendar;
+import java.util.concurrent.*;
+
+import static emu.grasscutter.config.Configuration.SERVER;
+import static emu.grasscutter.utils.lang.Language.translate;
+
 public final class Grasscutter {
     public static final File configFile = new File("./config.json");
     public static final Reflections reflector = new Reflections("emu.grasscutter");
@@ -183,6 +184,8 @@ public final class Grasscutter {
     private static void onShutdown() {
         // Disable all plugins.
         if (pluginManager != null) pluginManager.disablePlugins();
+        // Shutdown the game server.
+        if (gameServer != null) gameServer.onServerShutdown();
 
         try {
             // Wait for Grasscutter's thread pool to finish.

src/main/java/emu/grasscutter/command/CommandMap.java

@@ -1,15 +1,15 @@
 package emu.grasscutter.command;
 
-import static emu.grasscutter.config.Configuration.SERVER;
-
 import emu.grasscutter.Grasscutter;
 import emu.grasscutter.database.DatabaseHelper;
 import emu.grasscutter.game.player.Player;
-import it.unimi.dsi.fastutil.objects.Object2IntMap;
+import it.unimi.dsi.fastutil.objects.*;
-import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
-import java.util.*;
 import org.reflections.Reflections;
 
+import java.util.*;
+
+import static emu.grasscutter.config.Configuration.SERVER;
+
 @SuppressWarnings({"UnusedReturnValue", "unused"})
 public final class CommandMap {
     private static final int INVALID_UID = Integer.MIN_VALUE;

src/main/java/emu/grasscutter/server/game/GameServer.java

@@ -1,8 +1,5 @@
 package emu.grasscutter.server.game;
 
-import static emu.grasscutter.config.Configuration.*;
-import static emu.grasscutter.utils.lang.Language.translate;
-
 import emu.grasscutter.*;
 import emu.grasscutter.Grasscutter.ServerRunMode;
 import emu.grasscutter.database.DatabaseHelper;
@@ -33,13 +30,17 @@ import emu.grasscutter.server.event.types.ServerEvent;
 import emu.grasscutter.server.scheduler.ServerTaskScheduler;
 import emu.grasscutter.task.TaskMap;
 import emu.grasscutter.utils.Utils;
+import kcp.highway.*;
+import lombok.*;
+import org.jetbrains.annotations.NotNull;
+
 import java.net.*;
 import java.time.*;
 import java.util.*;
 import java.util.concurrent.*;
-import kcp.highway.*;
+
-import lombok.*;
+import static emu.grasscutter.config.Configuration.*;
-import org.jetbrains.annotations.NotNull;
+import static emu.grasscutter.utils.lang.Language.translate;
 
 @Getter
 public final class GameServer extends KcpServer implements Iterable<Player> {
@@ -164,9 +165,6 @@ public final class GameServer extends KcpServer implements Iterable<Player> {
 
         // Chata manager
         this.chatManager = new ChatSystem(this);
-
-        // Hook into shutdown event.
-        Runtime.getRuntime().addShutdownHook(new Thread(this::onServerShutdown));
     }
 
     private static InetSocketAddress getAdapterInetSocketAddress() {
@@ -330,11 +328,12 @@ public final class GameServer extends KcpServer implements Iterable<Player> {
         var event = new ServerStopEvent(ServerEvent.Type.GAME, OffsetDateTime.now());
         event.call();
 
+        // Save players & the world.
         this.getPlayers().forEach((uid, player) -> player.getSession().close());
-
         this.getWorlds().forEach(World::save);
 
         Utils.sleep(1000L); // Wait 1 second for operations to finish.
+        this.stop(); // Stop the server.
 
         try {
             var threadPool = GameSessionManager.getLogicThread();