perf: 重写部分代码

hamster-ball-bungeecord/src/main/java/cn/hamster3/mc/plugin/core/bungee/HamsterBallPlugin.java

@@ -36,6 +36,10 @@ public class HamsterBallPlugin extends Plugin {
     @Override
     public void onEnable() {
         Logger logger = getLogger();
+        if (!BallAPI.getInstance().isConnected()) {
+            ProxyServer.getInstance().stop("由于 HamsterBall 未能成功连接, 服务器将立即关闭.");
+            return;
+        }
         ProxyServer.getInstance().getPluginManager().registerListener(this, BallBungeeCordListener.INSTANCE);
         logger.info("已注册 BallBungeeCordListener.");
         BallAPI.getInstance().sendBallMessage(
@@ -44,7 +48,8 @@ public class HamsterBallPlugin extends Plugin {
                 new ServerOnlineEvent(BallAPI.getInstance().getLocalServerInfo())
         );
         logger.info("HamsterBall 已启动.");
-        BallAPI.getInstance().getAllPlayerInfo().values().stream()
+        BallAPI.getInstance().getAllPlayerInfo().values()
+                .stream()
                 .filter(BallPlayerInfo::isOnline)
                 .filter(o -> BallAPI.getInstance().isLocalServer(o.getProxyServer()))
                 .forEach(playerInfo -> {