make async pls, also add back the server list ping player structure back as an option

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

@@ -6,7 +6,8 @@
  */
 package com.imaginarycode.minecraft.redisbungee;
 
-import com.google.common.collect.*;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.io.ByteStreams;
 import net.md_5.bungee.api.ServerPing;
 import net.md_5.bungee.api.config.ServerInfo;
@@ -82,11 +83,7 @@ public class RedisBungee extends Plugin implements Listener {
             try {
                 for (String i : getConfiguration().getLinkedServers()) {
                     if (i.equals(configuration.getServerId())) continue;
-                    for (String p : rsc.smembers("server:" + i + ":usersOnline")) {
+                    players.addAll(rsc.smembers("server:" + i + ":usersOnline"));
-                        if (!players.contains(p)) {
-                            players.add(p);
-                        }
-                    }
                 }
             } finally {
                 pool.returnResource(rsc);
@@ -141,9 +138,7 @@ public class RedisBungee extends Plugin implements Listener {
             Jedis tmpRsc = pool.getResource();
             try {
                 tmpRsc.set("server:" + configuration.getServerId() + ":playerCount", "0"); // reset
-                for (String i : tmpRsc.smembers("server:" + configuration.getServerId() + ":usersOnline")) {
+                tmpRsc.srem("server:" + configuration.getServerId() + ":usersOnline", (String[]) tmpRsc.smembers("server:" + configuration.getServerId() + ":usersOnline").toArray());
-                    tmpRsc.srem("server:" + configuration.getServerId() + ":usersOnline", i);
-                }
             } finally {
                 pool.returnResource(tmpRsc);
             }
@@ -177,9 +172,7 @@ public class RedisBungee extends Plugin implements Listener {
             Jedis tmpRsc = pool.getResource();
             try {
                 tmpRsc.set("server:" + configuration.getServerId() + ":playerCount", "0"); // reset
-                for (String i : tmpRsc.smembers("server:" + configuration.getServerId() + ":usersOnline")) {
+                tmpRsc.srem("server:" + configuration.getServerId() + ":usersOnline", (String[]) tmpRsc.smembers("server:" + configuration.getServerId() + ":usersOnline").toArray());
-                    tmpRsc.srem("server:" + configuration.getServerId() + ":usersOnline", i);
-                }
             } catch (JedisException | ClassCastException ignored) {
             } finally {
                 pool.returnResource(tmpRsc);
@@ -223,6 +216,10 @@ public class RedisBungee extends Plugin implements Listener {
             configuration.setCanonicalGlist((Boolean) rawYaml.get("canonical-glist"));
         } catch (NullPointerException ignored) {
         }
+        try {
+            configuration.setPlayerListInPing(((Boolean) rawYaml.get("player-list-in-ping")));
+        } catch (NullPointerException ignored) {
+        }
         List<?> tmp = (List<?>) rawYaml.get("linked-servers");
 
         List<String> servers = new ArrayList<>();
@@ -244,6 +241,9 @@ public class RedisBungee extends Plugin implements Listener {
 
     @EventHandler
     public void onPlayerConnect(final PostLoginEvent event) {
+        getProxy().getScheduler().runAsync(this, new Runnable() {
+            @Override
+            public void run() {
                 if (pool != null) {
                     Jedis rsc = pool.getResource();
                     try {
@@ -257,9 +257,14 @@ public class RedisBungee extends Plugin implements Listener {
                     // out to not be needed at all, since ServerConnectedEvent is called anyway.
                 }
             }
+        });
+    }
 
     @EventHandler
-    public void onPlayerDisconnect(PlayerDisconnectEvent event) {
+    public void onPlayerDisconnect(final PlayerDisconnectEvent event) {
+        getProxy().getScheduler().runAsync(this, new Runnable() {
+            @Override
+            public void run() {
                 if (pool != null) {
                     Jedis rsc = pool.getResource();
                     try {
@@ -271,9 +276,14 @@ public class RedisBungee extends Plugin implements Listener {
                     }
                 }
             }
+        });
+    }
 
     @EventHandler
-    public void onServerChange(ServerConnectedEvent event) {
+    public void onServerChange(final ServerConnectedEvent event) {
+        getProxy().getScheduler().runAsync(this, new Runnable() {
+            @Override
+            public void run() {
                 if (pool != null) {
                     Jedis rsc = pool.getResource();
                     try {
@@ -283,12 +293,25 @@ public class RedisBungee extends Plugin implements Listener {
                     }
                 }
             }
+        });
+    }
 
     @EventHandler
     public void onPing(ProxyPingEvent event) {
         ServerPing old = event.getResponse();
         ServerPing reply = new ServerPing();
+        if (configuration.isPlayerListInPing()) {
+            Set<String> players = getPlayers();
+            ServerPing.PlayerInfo[] info = new ServerPing.PlayerInfo[players.size()];
+            int idx = 0;
+            for (String player : players) {
+                info[idx] = new ServerPing.PlayerInfo(player, "");
+                idx++;
+            }
+            reply.setPlayers(new ServerPing.Players(old.getPlayers().getMax(), players.size(), info));
+        } else {
             reply.setPlayers(new ServerPing.Players(old.getPlayers().getMax(), getCount(), EMPTY_PLAYERINFO));
+        }
         reply.setDescription(old.getDescription());
         reply.setFavicon(old.getFavicon());
         reply.setVersion(old.getVersion());

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

@@ -24,5 +24,6 @@ import java.util.List;
 public class RedisBungeeConfiguration {
     private String serverId = "iluvbungee";
     private boolean canonicalGlist = true;
+    private boolean playerListInPing = false;
     private List<String> linkedServers = Collections.emptyList();
 }

src/main/resources/example_config.yml

@@ -8,6 +8,9 @@ server-id: iluvbungee
 # Whether or not /glist showall output should match vanilla BungeeCord.
 canonical-glist: true
 
+# Output all players in the server list. Recommended only for smaller networks.
+player-list-in-ping: false
+
 # All other RedisBungee server IDs in the network.
 linked-servers:
 - dastank