Fix #287 - TPSBarTask NPE (again)

patches/server/0154-Implement-TPSBar.patch

@@ -17,18 +17,10 @@ index a551636c2c59e68a5abb1cd5611c1d5c7e36f514..b7663a3d64ae5202abb93eabba6ec013
  
          if (commanddispatcher_servertype.d) {
 diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
-index 45cb8681fd0942084b56eb8d45390c2dbc8a4f3d..966b6e2f9b7c473d8dfcae205d8ef8f08912ded9 100644
+index 45cb8681fd0942084b56eb8d45390c2dbc8a4f3d..16c20b3e7dcbbdb08e8c2a15074495eacc001e70 100644
 --- a/src/main/java/net/minecraft/server/MinecraftServer.java
 +++ b/src/main/java/net/minecraft/server/MinecraftServer.java
-@@ -584,6 +584,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
-         this.serverConnection.acceptConnections();
-         // CraftBukkit end
- 
-+        net.pl3x.purpur.task.TPSBarTask.start(); // Purpur
-     }
- 
-     protected void updateWorldSettings() {}
-@@ -979,6 +980,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
+@@ -979,6 +979,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
          this.safeShutdown(flag, false);
      }
      public void safeShutdown(boolean flag, boolean isRestarting) {
@@ -36,6 +28,19 @@ index 45cb8681fd0942084b56eb8d45390c2dbc8a4f3d..966b6e2f9b7c473d8dfcae205d8ef8f0
          this.isRunning = false;
          this.isRestarting = isRestarting;
          this.hasLoggedStop = true; // Paper
+diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+index 28d47ef97939309ce26b6e4cae14925b510755fd..6d39b777a0f708d61f611d9c16c3b3c48f89d477 100644
+--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
++++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+@@ -323,6 +323,8 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
+                 MinecraftServerBeans.a((MinecraftServer) this);
+             }
+ 
++            net.pl3x.purpur.task.TPSBarTask.start(); // Purpur
++
+             return true;
+         }
+     }
 diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
 index c316b0468c53825f90d9bc2ad40d655d92857715..d710834422afa1d4336f68e2425aaffd64d444e2 100644
 --- a/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -84,10 +89,10 @@ index 0000000000000000000000000000000000000000..807f5709af7fd9497633ecfc9e932f0d
 +}
 diff --git a/src/main/java/net/pl3x/purpur/task/TPSBarTask.java b/src/main/java/net/pl3x/purpur/task/TPSBarTask.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..f9f75d96565ccee9437b7d39a98c9adf97446e51
+index 0000000000000000000000000000000000000000..a9d71d2b769b8e4e0f5039e997fc5ebc1cc9bfbb
 --- /dev/null
 +++ b/src/main/java/net/pl3x/purpur/task/TPSBarTask.java
-@@ -0,0 +1,112 @@
+@@ -0,0 +1,116 @@
 +package net.pl3x.purpur.task;
 +
 +import org.bukkit.Bukkit;
@@ -105,12 +110,18 @@ index 0000000000000000000000000000000000000000..f9f75d96565ccee9437b7d39a98c9adf
 +    private final NamespacedKey key;
 +    private BossBar bossbar;
 +
-+    public TPSBarTask() {
-+        instance = this;
++    private TPSBarTask() {
 +        this.key = new NamespacedKey("purpur", "tpsbar");
 +    }
 +
-+    public BossBar getBossBar() {
++    private static TPSBarTask instance() {
++        if (instance == null) {
++            instance = new TPSBarTask();
++        }
++        return instance;
++    }
++
++    private BossBar bossbar() {
 +        if (bossbar == null) {
 +            bossbar = Bukkit.getBossBar(key);
 +            if (bossbar == null) {
@@ -124,7 +135,7 @@ index 0000000000000000000000000000000000000000..f9f75d96565ccee9437b7d39a98c9adf
 +
 +    @Override
 +    public void run() {
-+        BossBar bossbar = getBossBar();
++        BossBar bossbar = bossbar();
 +        if (bossbar.getPlayers().isEmpty()) {
 +            return;
 +        }
@@ -167,19 +178,18 @@ index 0000000000000000000000000000000000000000..f9f75d96565ccee9437b7d39a98c9adf
 +    @Override
 +    public void cancel() {
 +        super.cancel();
-+        BossBar bossbar = getBossBar();
++        BossBar bossbar = bossbar();
 +        bossbar.setVisible(false);
 +        bossbar.removeAll();
 +        Bukkit.removeBossBar(key);
 +    }
 +
 +    public static void removePlayer(Player player) {
-+        BossBar bossbar = instance.getBossBar();
-+        bossbar.removePlayer(player);
++        instance().bossbar().removePlayer(player);
 +    }
 +
 +    public static void togglePlayer(Player player) {
-+        BossBar bossbar = instance.getBossBar();
++        BossBar bossbar = instance().bossbar();
 +        if (bossbar.getPlayers().contains(player)) {
 +            bossbar.removePlayer(player);
 +        } else {
@@ -190,8 +200,7 @@ index 0000000000000000000000000000000000000000..f9f75d96565ccee9437b7d39a98c9adf
 +
 +    public static void start() {
 +        stop();
-+        instance = new TPSBarTask();
-+        instance.runTaskTimerAsynchronously(new MinecraftInternalPlugin(), 20L, 20L);
++        instance().runTaskTimerAsynchronously(new MinecraftInternalPlugin(), 20L, 20L);
 +    }
 +
 +    public static void stop() {