Add getPlayersOnServer method

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

@@ -6,7 +6,9 @@
  */
 package com.imaginarycode.minecraft.redisbungee;
 
+import com.google.common.collect.HashMultimap;
 import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Multimap;
 import com.google.common.io.ByteStreams;
 import net.md_5.bungee.api.ServerPing;
 import net.md_5.bungee.api.config.ServerInfo;
@@ -55,6 +57,16 @@ public final class RedisBungee extends Plugin implements Listener {
         return configuration;
     }
 
+    static Multimap<String, String> serversToPlayers() {
+        Multimap<String, String> serverToPlayers = HashMultimap.create();
+        for (String p : RedisBungee.getApi().getPlayersOnline()) {
+            ServerInfo si = RedisBungee.getApi().getServerFor(p);
+            if (si != null)
+                serverToPlayers.put(si.getName(), p);
+        }
+        return serverToPlayers;
+    }
+
     final int getCount() {
         int c = plugin.getProxy().getOnlineCount();
         if (pool != null) {
@@ -91,6 +103,10 @@ public final class RedisBungee extends Plugin implements Listener {
         return ImmutableSet.copyOf(players);
     }
 
+    final Set<String> getPlayersOnServer(String server) {
+        return new HashSet<>(serversToPlayers().get(server));
+    }
+
     final ServerInfo getServerFor(String name) {
         ServerInfo server = null;
         if (plugin.getProxy().getPlayer(name) != null) return plugin.getProxy().getPlayer(name).getServer().getInfo();

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

@@ -6,13 +6,12 @@
  */
 package com.imaginarycode.minecraft.redisbungee;
 
+import lombok.NonNull;
 import net.md_5.bungee.api.config.ServerInfo;
 
 import java.net.InetAddress;
 import java.util.Set;
 
-import lombok.NonNull;
-
 /**
  * This class exposes some internal RedisBungee functions. You obtain an instance of this object by invoking {@link RedisBungee#getApi()}.
  *
@@ -68,6 +67,15 @@ public class RedisBungeeAPI {
         return plugin.getPlayers();
     }
 
+    /**
+     * Get a list of players on the server with the given name.
+     * @param server a server name
+     * @return a Set with all players found on this server
+     */
+    public final Set<String> getPlayersOnServer(@NonNull String server) {
+        return plugin.getPlayersOnServer(server);
+    }
+
     /**
      * Convenience method: Checks if the specified player is online.
      *

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

@@ -7,7 +7,6 @@
 package com.imaginarycode.minecraft.redisbungee;
 
 import com.google.common.base.Joiner;
-import com.google.common.collect.HashMultimap;
 import com.google.common.collect.Multimap;
 import net.md_5.bungee.api.ChatColor;
 import net.md_5.bungee.api.CommandSender;
@@ -48,12 +47,7 @@ class RedisBungeeCommands {
                     .append(" player(s) are currently online.").create();
             if (args.length > 0 && args[0].equals("showall")) {
                 if (RedisBungee.getConfiguration().getBoolean("canonical-glist", true)) {
-                    Multimap<String, String> serverToPlayers = HashMultimap.create();
+                    Multimap<String, String> serverToPlayers = RedisBungee.serversToPlayers();
-                    for (String p : RedisBungee.getApi().getPlayersOnline()) {
-                        ServerInfo si = RedisBungee.getApi().getServerFor(p);
-                        if (si != null)
-                            serverToPlayers.put(si.getName(), p);
-                    }
                     for (String server : new TreeSet<>(serverToPlayers.keySet())) {
                         TextComponent serverName = new TextComponent();
                         serverName.setColor(ChatColor.GREEN);