Merge pull request WearBlackAllDay#16 from manugame/master

Fixes WearBlackAllDay#14

Author: KaptainWutax

src/main/java/dimthread/mixin/MinecraftServerMixin.java

@@ -77,5 +77,13 @@ public void tickWorlds(BooleanSupplier shouldKeepTicking, CallbackInfo ci) {
 			crash.get().crash("Exception ticking world");
 		}
 	}
-	
+
+	/**
+	 * Shutdown all threadpools when the server stop.
+	 * Prevent server hang when stopping the server.
+	 * */
+	@Inject(method = "shutdown", at = @At("HEAD"))
+	public void shutdownThreadpool(CallbackInfo ci) {
+		DimThread.MANAGER.threadPools.forEach((server, pool) -> pool.shutdown());
+	}
 }

src/main/java/dimthread/util/ServerManager.java

@@ -13,7 +13,7 @@
 public class ServerManager {
 
 	private final Map<MinecraftServer, Boolean> actives = Collections.synchronizedMap(new WeakHashMap<>());
-	private final Map<MinecraftServer, ThreadPool> threadPools = Collections.synchronizedMap(new WeakHashMap<>());
+	public final Map<MinecraftServer, ThreadPool> threadPools = Collections.synchronizedMap(new WeakHashMap<>());
 
 	public boolean isActive(MinecraftServer server) {
 		return this.actives.computeIfAbsent(server, s -> s.getGameRules().get(ModGameRules.ACTIVE.getKey()).get());