Don't use always exceptions

src/main/java/com/comphenix/protocol/ProtocolLib.java

@@ -33,6 +33,7 @@ import com.comphenix.protocol.utility.MinecraftVersion;
 import com.comphenix.protocol.utility.Util;
 import com.google.common.base.Splitter;
 import com.google.common.collect.Iterables;
+
 import java.io.File;
 import java.io.IOException;
 import java.util.HashSet;
@@ -44,6 +45,7 @@ import java.util.logging.LogRecord;
 import java.util.logging.Logger;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+
 import org.bukkit.Server;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.PluginCommand;
@@ -58,6 +60,8 @@ import org.bukkit.plugin.java.JavaPlugin;
  */
 public class ProtocolLib extends JavaPlugin {
 
+    public static boolean isFolia = false;
+
     // Every possible error or warning report type
     public static final ReportType REPORT_CANNOT_DELETE_CONFIG = new ReportType(
             "Cannot delete old ProtocolLib configuration.");
@@ -303,6 +307,13 @@ public class ProtocolLib extends JavaPlugin {
 
     @Override
     public void onEnable() {
+        try {
+            Class.forName("io.papermc.paper.threadedregions.RegionizedServer");
+            isFolia = true;
+        } catch (ClassNotFoundException e) {
+            isFolia = false;
+        }
+
         try {
             Server server = this.getServer();
             PluginManager manager = server.getPluginManager();
@@ -491,11 +502,10 @@ public class ProtocolLib extends JavaPlugin {
 
             // Attempt to create task
 
-			try {
+            if (isFolia) {
-				Class.forName("io.papermc.paper.threadedregions.RegionizedServer");
                 this.packetTask = 1;
                 server.getGlobalRegionScheduler().runAtFixedRate(this, task -> packetTaskRegistrator(), ASYNC_MANAGER_DELAY, ASYNC_MANAGER_DELAY);
-			} catch (ClassNotFoundException e) {
+            } else {
                 this.packetTask = server.getScheduler().scheduleSyncRepeatingTask(this, this::packetTaskRegistrator, ASYNC_MANAGER_DELAY, ASYNC_MANAGER_DELAY);
             }
         } catch (OutOfMemoryError e) {
@@ -575,10 +585,9 @@ public class ProtocolLib extends JavaPlugin {
 
         // Clean up
         if (this.packetTask >= 0) {
-			try {
+            if (isFolia) {
-				Class.forName("io.papermc.paper.threadedregions.RegionizedServer");
                 this.getServer().getGlobalRegionScheduler().cancelTasks(this);
-			} catch (ClassNotFoundException e) {
+            } else {
                 this.getServer().getScheduler().cancelTask(this.packetTask);
             }
             this.packetTask = -1;

src/main/java/com/comphenix/protocol/updater/SpigotUpdater.java

@@ -1,21 +1,22 @@
 /**
  * ProtocolLib - Bukkit server library that allows access to the Minecraft protocol.
  * Copyright (C) 2015 dmulloy2
- *
+ * <p>
  * This program is free software; you can redistribute it and/or modify it under the terms of the
  * GNU General Public License as published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
- *
+ * <p>
  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  * See the GNU General Public License for more details.
- *
+ * <p>
  * You should have received a copy of the GNU General Public License along with this program;
  * if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  * 02111-1307 USA
  */
 package com.comphenix.protocol.updater;
 
+import com.comphenix.protocol.ProtocolLib;
 import com.comphenix.protocol.ProtocolLibrary;
 import com.comphenix.protocol.error.Report;
 import com.comphenix.protocol.utility.Closer;
@@ -80,10 +81,9 @@ public final class SpigotUpdater extends Updater {
             } finally {
                 // Invoke the listeners on the main thread
                 for (Runnable listener : listeners) {
-					try {
+                    if (ProtocolLib.isFolia) {
-						Class.forName("io.papermc.paper.threadedregions.RegionizedServer");
                         plugin.getServer().getGlobalRegionScheduler().execute(plugin, listener);
-					} catch (ClassNotFoundException e) {
+                    } else {
                         plugin.getServer().getScheduler().scheduleSyncDelayedTask(plugin, listener);
                     }
                 }