Allow async ping to be toggled off as needed

src/main/java/com/imaginarycode/minecraft/redisbungee/RedisBungeeConfiguration.java

@@ -18,11 +18,14 @@ public class RedisBungeeConfiguration {
     private final boolean registerBungeeCommands;
     @Getter
     private final List<InetAddress> exemptAddresses;
+    @Getter
+    private final boolean useAsyncPing;
 
     public RedisBungeeConfiguration(JedisPool pool, Configuration configuration) {
         this.pool = pool;
         this.serverId = configuration.getString("server-id");
         this.registerBungeeCommands = configuration.getBoolean("register-bungee-commands", true);
+        this.useAsyncPing = configuration.getBoolean("use-async-ping", true);
 
         List<String> stringified = configuration.getStringList("exempt-ip-addresses");
         ImmutableList.Builder<InetAddress> addressBuilder = ImmutableList.builder();

src/main/java/com/imaginarycode/minecraft/redisbungee/RedisBungeeListener.java

@@ -45,8 +45,6 @@ public class RedisBungeeListener implements Listener {
     private final RedisBungee plugin;
     private final List<InetAddress> exemptAddresses;
 
-    private static final List<String> ASYNC_PING_EVENT_HOSTILE = ImmutableList.of("ServerListPlus", "SwiftMOTD");
-
     @EventHandler(priority = EventPriority.LOWEST)
     public void onLogin(final LoginEvent event) {
         event.registerIntent(plugin);
@@ -146,15 +144,7 @@ public class RedisBungeeListener implements Listener {
             return;
         }
 
-        boolean runAsync = true;
-        for (String s : ASYNC_PING_EVENT_HOSTILE) {
-            if (ProxyServer.getInstance().getPluginManager().getPlugin(s) != null) {
-                runAsync = false;
-                break;
-            }
-        }
-
-        if (runAsync) {
+        if (RedisBungee.getConfiguration().isUseAsyncPing()) {
             event.registerIntent(plugin);
             plugin.getProxy().getScheduler().runAsync(plugin, new Runnable() {
                 @Override
@@ -164,7 +154,6 @@ public class RedisBungeeListener implements Listener {
                 }
             });
         } else {
-            // Async ping event will not work as an async-hostile plugin was found, so perform the ping modification synchronously.
             event.getResponse().getPlayers().setOnline(plugin.getCount());
         }
     }

src/main/resources/example_config.yml

@@ -26,6 +26,10 @@ server-id: test1
 # modules, and these must be disabled or overridden yourself.
 register-bungee-commands: true
 
+# Whether or not to use asynchronous ping event handling. This will greatly reduce lag and issues when pinging servers,
+# but this isn't compatible with some MOTD plugins.
+use-async-ping: true
+
 # A list of IP addresses for which RedisBungee will not modify the response for, useful for automatic
 # restart scripts.
 exempt-ip-addresses: []