Fix NullPointerException due plugin instance for jedis tasks in UUIDTranslator/AbstractDataManager (#57)

RedisBungee-API/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>RedisBungee</artifactId>
         <groupId>com.imaginarycode.minecraft</groupId>
-        <version>0.8.1-SNAPSHOT</version>
+        <version>0.10.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/AbstractDataManager.java

@@ -59,7 +59,7 @@ public abstract class AbstractDataManager<P, PL, PD, PS> {
             return plugin.isPlayerOnAServer(player) ? plugin.getPlayerServerName(player) : null;
 
         try {
-            return serverCache.get(uuid, new RedisTask<String>(plugin.getAbstractRedisBungeeApi()) {
+            return serverCache.get(uuid, new RedisTask<String>(plugin) {
                 @Override
                 public String unifiedJedisTask(UnifiedJedis unifiedJedis) {
                     return Objects.requireNonNull(unifiedJedis.hget("player:" + uuid, "server"), "user not found");
@@ -82,7 +82,7 @@ public abstract class AbstractDataManager<P, PL, PD, PS> {
             return plugin.getConfiguration().getProxyId();
 
         try {
-            return proxyCache.get(uuid, new RedisTask<String>(plugin.getAbstractRedisBungeeApi()) {
+            return proxyCache.get(uuid, new RedisTask<String>(plugin) {
                 @Override
                 public String unifiedJedisTask(UnifiedJedis unifiedJedis) {
                     return Objects.requireNonNull(unifiedJedis.hget("player:" + uuid, "proxy"), "user not found");
@@ -103,7 +103,7 @@ public abstract class AbstractDataManager<P, PL, PD, PS> {
             return plugin.getPlayerIp(player);
 
         try {
-            return ipCache.get(uuid, new RedisTask<InetAddress>(plugin.getAbstractRedisBungeeApi()) {
+            return ipCache.get(uuid, new RedisTask<InetAddress>(plugin) {
                 @Override
                 public InetAddress unifiedJedisTask(UnifiedJedis unifiedJedis) {
                     String result = unifiedJedis.hget("player:" + uuid, "ip");
@@ -127,7 +127,7 @@ public abstract class AbstractDataManager<P, PL, PD, PS> {
             return 0;
 
         try {
-            return lastOnlineCache.get(uuid, new RedisTask<Long>(plugin.getAbstractRedisBungeeApi()) {
+            return lastOnlineCache.get(uuid, new RedisTask<Long>(plugin) {
 
                 @Override
                 public Long unifiedJedisTask(UnifiedJedis unifiedJedis) {

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/AbstractRedisBungeeListener.java

@@ -23,10 +23,6 @@ import java.util.Map;
 
 public abstract class AbstractRedisBungeeListener<LE, PLE, PD, SC, PP, PM, PS> {
 
-    protected static final String ALREADY_LOGGED_IN = "§cYou are already logged on to this server. \n\nIt may help to try logging in again in a few minutes.\nIf this does not resolve your issue, please contact staff.";
-
-    protected static final String ONLINE_MODE_RECONNECT = "§cWhoops! You need to reconnect\n\nWe found someone online using your username. They were kicked and you may reconnect.\nIf this does not work, please contact staff.";
-
     protected final RedisBungeePlugin<?> plugin;
     protected final List<InetAddress> exemptAddresses;
     protected final Gson gson = new Gson();

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/RedisBungeePlugin.java

@@ -67,7 +67,7 @@ public interface RedisBungeePlugin<P> extends EventsPlatform {
                     String v = stringStringEntry.getValue();
 
                     long heartbeatTime = Long.parseLong(v);
-                    if (heartbeatTime + 30 >= redisTime) {
+                    if (heartbeatTime + RedisUtil.PROXY_TIMEOUT >= redisTime) {
                         total = total + unifiedJedis.scard("proxy:" + k + ":usersOnline");
                     }
                 }

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/config/ConfigLoader.java

@@ -11,6 +11,8 @@
 package com.imaginarycode.minecraft.redisbungee.api.config;
 
 
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
 import com.google.common.reflect.TypeToken;
 import com.imaginarycode.minecraft.redisbungee.api.RedisBungeeMode;
 import com.imaginarycode.minecraft.redisbungee.api.RedisBungeePlugin;
@@ -50,7 +52,8 @@ public interface ConfigLoader {
         final boolean useSSL = node.getNode("useSSL").getBoolean(false);
         final boolean overrideBungeeCommands = node.getNode("override-bungee-commands").getBoolean(false);
         final boolean registerLegacyCommands = node.getNode("register-legacy-commands").getBoolean(false);
-        String redisPassword = node.getNode("redis-password").getString(null);
+        final boolean restoreOldKickBehavior = node.getNode("disable-kick-when-online").getBoolean(false);
+        String redisPassword = node.getNode("redis-password").getString("");
         String proxyId = node.getNode("proxy-id").getString("test-1");
         final int maxConnections = node.getNode("max-redis-connections").getInt(10);
         List<String> exemptAddresses;
@@ -61,15 +64,12 @@ public interface ConfigLoader {
         }
 
         // check redis password
-        if (redisPassword != null && (redisPassword.isEmpty() || redisPassword.equals("none"))) {
+        if ((redisPassword.isEmpty() || redisPassword.equals("none"))) {
             redisPassword = null;
-            plugin.logWarn("INSECURE setup was detected Please set password for your redis instance.");
+            plugin.logWarn("password is empty");
         }
-        if (redisPassword == null) {
+        if (useSSL) {
-            plugin.logWarn("INSECURE setup was detected Please set password for your redis instance.");
+            plugin.logInfo("Using ssl");
-        }
-        if (!useSSL) {
-            plugin.logWarn("INSECURE setup was detected Please setup ssl for your redis instance.");
         }
         // Configuration sanity checks.
         if (proxyId == null || proxyId.isEmpty()) {
@@ -82,7 +82,7 @@ public interface ConfigLoader {
         } else {
             plugin.logInfo("Loaded proxy id " + proxyId);
         }
-        RedisBungeeConfiguration configuration = new RedisBungeeConfiguration(proxyId, exemptAddresses, registerLegacyCommands, overrideBungeeCommands);
+        RedisBungeeConfiguration configuration = new RedisBungeeConfiguration(proxyId, exemptAddresses, registerLegacyCommands, overrideBungeeCommands, getMessagesFromPath(createMessagesFile(dataFolder)), restoreOldKickBehavior);
         Summoner<?> summoner;
         RedisBungeeMode redisBungeeMode;
         if (node.getNode("cluster-mode-enabled").getBoolean(false)) {
@@ -130,6 +130,30 @@ public interface ConfigLoader {
 
     void onConfigLoad(RedisBungeeConfiguration configuration, Summoner<?> summoner, RedisBungeeMode mode);
 
+    default ImmutableMap<RedisBungeeConfiguration.MessageType, String> getMessagesFromPath(Path path) throws IOException {
+        final YAMLConfigurationLoader yamlConfigurationFileLoader = YAMLConfigurationLoader.builder().setPath(path).build();
+        ConfigurationNode node = yamlConfigurationFileLoader.load();
+        HashMap<RedisBungeeConfiguration.MessageType, String> messages = new HashMap<>();
+        messages.put(RedisBungeeConfiguration.MessageType.LOGGED_IN_OTHER_LOCATION, node.getNode("logged-in-other-location").getString("§cLogged in from another location."));
+        messages.put(RedisBungeeConfiguration.MessageType.ALREADY_LOGGED_IN, node.getNode("already-logged-in").getString("§cYou are already logged in!"));
+        return ImmutableMap.copyOf(messages);
+    }
+
+    default Path createMessagesFile(Path dataFolder) throws IOException {
+        if (Files.notExists(dataFolder)) {
+            Files.createDirectory(dataFolder);
+        }
+        Path file = dataFolder.resolve("messages.yml");
+        if (Files.notExists(file)) {
+            try (InputStream in = getClass().getClassLoader().getResourceAsStream("messages.yml")) {
+                Files.createFile(file);
+                assert in != null;
+                Files.copy(in, file, StandardCopyOption.REPLACE_EXISTING);
+            }
+        }
+        return file;
+    }
+
     default Path createConfigFile(Path dataFolder) throws IOException {
         if (Files.notExists(dataFolder)) {
             Files.createDirectory(dataFolder);
@@ -153,8 +177,6 @@ public interface ConfigLoader {
         Path oldConfigPath = dataFolder.resolve("config.yml");
         Files.move(oldConfigPath, oldConfigFolder.resolve(UUID.randomUUID() + "_config.yml"));
         createConfigFile(dataFolder);
-
     }
 
-
 }

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/config/RedisBungeeConfiguration.java

@@ -11,23 +11,33 @@
 package com.imaginarycode.minecraft.redisbungee.api.config;
 
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableMultimap;
 import com.google.common.net.InetAddresses;
 
 import java.net.InetAddress;
+import java.util.HashMap;
 import java.util.List;
 
 public class RedisBungeeConfiguration {
+
+    public enum MessageType {
+        LOGGED_IN_OTHER_LOCATION,
+        ALREADY_LOGGED_IN
+    }
+
+    private final ImmutableMap<MessageType, String> messages;
     public static final int CONFIG_VERSION = 1;
     private final String proxyId;
     private final List<InetAddress> exemptAddresses;
-
     private final boolean registerLegacyCommands;
-
     private final boolean overrideBungeeCommands;
 
-    public RedisBungeeConfiguration(String proxyId, List<String> exemptAddresses, boolean registerLegacyCommands, boolean overrideBungeeCommands) {
+    private final boolean restoreOldKickBehavior;
-        this.proxyId = proxyId;
 
+    public RedisBungeeConfiguration(String proxyId, List<String> exemptAddresses, boolean registerLegacyCommands, boolean overrideBungeeCommands, ImmutableMap<MessageType, String> messages, boolean restoreOldKickBehavior) {
+        this.proxyId = proxyId;
+        this.messages = messages;
         ImmutableList.Builder<InetAddress> addressBuilder = ImmutableList.builder();
         for (String s : exemptAddresses) {
             addressBuilder.add(InetAddresses.forString(s));
@@ -35,8 +45,8 @@ public class RedisBungeeConfiguration {
         this.exemptAddresses = addressBuilder.build();
         this.registerLegacyCommands = registerLegacyCommands;
         this.overrideBungeeCommands = overrideBungeeCommands;
+        this.restoreOldKickBehavior = restoreOldKickBehavior;
     }
-
     public String getProxyId() {
         return proxyId;
     }
@@ -52,4 +62,12 @@ public class RedisBungeeConfiguration {
     public boolean doOverrideBungeeCommands() {
         return overrideBungeeCommands;
     }
+
+    public ImmutableMap<MessageType, String> getMessages() {
+        return messages;
+    }
+
+    public boolean restoreOldKickBehavior() {
+        return restoreOldKickBehavior;
+    }
 }

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/tasks/InitialUtils.java

@@ -40,7 +40,7 @@ public class InitialUtils {
                         }
                         long uuidCacheSize = unifiedJedis.hlen("uuid-cache");
                         if (uuidCacheSize > 750000) {
-                            plugin.logInfo("Looks like you have a really big UUID cache! Run https://www.spigotmc.org/resources/redisbungeecleaner.8505/ as soon as possible.");
+                            plugin.logInfo("Looks like you have a really big UUID cache! Run https://github.com/ProxioDev/Brains");
                         }
                         break;
                     }

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/util/RedisUtil.java

@@ -4,7 +4,7 @@ import com.google.common.annotations.VisibleForTesting;
 
 @VisibleForTesting
 public class RedisUtil {
-    public static int PROXY_TIMEOUT = 30;
+    public final static int PROXY_TIMEOUT = 30;
     public static boolean isRedisVersionRight(String redisVersion) {
         String[] args = redisVersion.split("\\.");
         if (args.length < 2) {

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/util/player/PlayerUtils.java

@@ -14,28 +14,41 @@ import static com.imaginarycode.minecraft.redisbungee.api.util.payload.PayloadUt
 public class PlayerUtils {
 
     public static void cleanUpPlayer(String uuid, UnifiedJedis rsc, boolean firePayload) {
+        final long timestamp = System.currentTimeMillis();
+        final boolean isKickedFromOtherLocation = isKickedOtherLocation(uuid, rsc);
         rsc.srem("proxy:" + AbstractRedisBungeeAPI.getAbstractRedisBungeeAPI().getProxyId() + ":usersOnline", uuid);
-        rsc.hdel("player:" + uuid, "server", "ip", "proxy");
+        if (!isKickedFromOtherLocation) {
-        long timestamp = System.currentTimeMillis();
+            rsc.hdel("player:" + uuid, "server", "ip", "proxy");
-        rsc.hset("player:" + uuid, "online", String.valueOf(timestamp));
+            rsc.hset("player:" + uuid, "online", String.valueOf(timestamp));
-        if (firePayload) {
+        }
+        if (firePayload && !isKickedFromOtherLocation) {
             playerQuitPayload(uuid, rsc, timestamp);
         }
     }
 
+    public static void setKickedOtherLocation(String uuid, UnifiedJedis unifiedJedis) {
+        // set anything for sake of exists check. then expire it after 2 seconds. should be great?
+        unifiedJedis.set("kicked-other-location::" + uuid, "0");
+        unifiedJedis.expire("kicked-other-location::" + uuid, 2);
+    }
+
+    public static boolean isKickedOtherLocation(String uuid, UnifiedJedis unifiedJedis) {
+        return unifiedJedis.exists("kicked-other-location::" + uuid);
+    }
+
+
     public static void createPlayer(UUID uuid, UnifiedJedis unifiedJedis, String currentServer, InetAddress hostname, boolean fireEvent) {
-        if (currentServer != null) {
+        final boolean isKickedFromOtherLocation = isKickedOtherLocation(uuid.toString(), unifiedJedis);
-            unifiedJedis.hset("player:" + uuid, "server", currentServer);
-        }
         Map<String, String> playerData = new HashMap<>(4);
         playerData.put("online", "0");
         playerData.put("ip", hostname.getHostName());
         playerData.put("proxy", AbstractRedisBungeeAPI.getAbstractRedisBungeeAPI().getProxyId());
-
+        if (currentServer != null) {
+            playerData.put("server", currentServer);
+        }
         unifiedJedis.sadd("proxy:" + AbstractRedisBungeeAPI.getAbstractRedisBungeeAPI().getProxyId() + ":usersOnline", uuid.toString());
-        unifiedJedis.hmset("player:" + uuid, playerData);
+        unifiedJedis.hset("player:" + uuid, playerData);
-
+        if (fireEvent && !isKickedFromOtherLocation) {
-        if (fireEvent) {
             playerJoinPayload(uuid, unifiedJedis, hostname);
         }
     }

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/util/uuid/CachedUUIDEntry.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2013-present RedisBungee contributors
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ *
+ *  http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package com.imaginarycode.minecraft.redisbungee.api.util.uuid;
+
+import java.util.Calendar;
+import java.util.UUID;
+
+public class CachedUUIDEntry {
+    private final String name;
+    private final UUID uuid;
+    private final Calendar expiry;
+
+    public CachedUUIDEntry(String name, UUID uuid, Calendar expiry) {
+        this.name = name;
+        this.uuid = uuid;
+        this.expiry = expiry;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public UUID getUuid() {
+        return uuid;
+    }
+
+    public Calendar getExpiry() {
+        return expiry;
+    }
+
+    public boolean expired() {
+        return Calendar.getInstance().after(expiry);
+    }
+}

RedisBungee-API/src/main/java/com/imaginarycode/minecraft/redisbungee/api/util/uuid/UUIDTranslator.java

@@ -70,7 +70,7 @@ public final class UUIDTranslator {
         if (!plugin.isOnlineMode()) {
             return UUID.nameUUIDFromBytes(("OfflinePlayer:" + player).getBytes(Charsets.UTF_8));
         }
-        RedisTask<UUID> redisTask = new RedisTask<UUID>(plugin.getAbstractRedisBungeeApi()) {
+        RedisTask<UUID> redisTask = new RedisTask<UUID>(plugin) {
             @Override
             public UUID unifiedJedisTask(UnifiedJedis unifiedJedis) {
                 String stored = unifiedJedis.hget("uuid-cache", player.toLowerCase());
@@ -135,7 +135,7 @@ public final class UUIDTranslator {
                 uuidToNameMap.remove(player);
         }
 
-        RedisTask<String> redisTask = new RedisTask<String>(plugin.getAbstractRedisBungeeApi()) {
+        RedisTask<String> redisTask = new RedisTask<String>(plugin) {
             @Override
             public String unifiedJedisTask(UnifiedJedis unifiedJedis) {
                 String stored = unifiedJedis.hget("uuid-cache", player.toString());
@@ -191,34 +191,8 @@ public final class UUIDTranslator {
     public void persistInfo(String name, UUID uuid, UnifiedJedis unifiedJedis) {
         addToMaps(name, uuid);
         String json = gson.toJson(uuidToNameMap.get(uuid));
-        unifiedJedis.hmset("uuid-cache", ImmutableMap.of(name.toLowerCase(), json, uuid.toString(), json));
+        unifiedJedis.hset("uuid-cache", ImmutableMap.of(name.toLowerCase(), json, uuid.toString(), json));
     }
 
-    private static class CachedUUIDEntry {
-        private final String name;
-        private final UUID uuid;
-        private final Calendar expiry;
 
-        public CachedUUIDEntry(String name, UUID uuid, Calendar expiry) {
-            this.name = name;
-            this.uuid = uuid;
-            this.expiry = expiry;
-        }
-
-        public String getName() {
-            return name;
-        }
-
-        public UUID getUuid() {
-            return uuid;
-        }
-
-        public Calendar getExpiry() {
-            return expiry;
-        }
-
-        public boolean expired() {
-            return Calendar.getInstance().after(expiry);
-        }
-    }
 }

RedisBungee-API/src/main/resources/config.yml

@@ -68,5 +68,10 @@ override-bungee-commands: false
 # restart scripts.
 exempt-ip-addresses: []
 
+# restore old login when online behavior before 0.9.0 update
+# uncomment to enable it
+
+# disable-kick-when-online: true
+
 # Config version DO NOT CHANGE!!!!
 config-version: 1

RedisBungee-API/src/main/resources/messages.yml

@@ -0,0 +1,2 @@
+logged-in-other-location: "§cYou logged in from another location!"
+already-logged-in: "§cYou are already logged in!"

RedisBungee-Bungee/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>RedisBungee</artifactId>
         <groupId>com.imaginarycode.minecraft</groupId>
-        <version>0.8.1-SNAPSHOT</version>
+        <version>0.10.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

RedisBungee-Bungee/src/main/java/com/imaginarycode/minecraft/redisbungee/RedisBungeeBungeeListener.java

@@ -17,6 +17,7 @@ import com.google.common.io.ByteArrayDataInput;
 import com.google.common.io.ByteArrayDataOutput;
 import com.google.common.io.ByteStreams;
 import com.imaginarycode.minecraft.redisbungee.api.AbstractRedisBungeeListener;
+import com.imaginarycode.minecraft.redisbungee.api.config.RedisBungeeConfiguration;
 import com.imaginarycode.minecraft.redisbungee.api.util.player.PlayerUtils;
 import com.imaginarycode.minecraft.redisbungee.api.RedisBungeePlugin;
 import com.imaginarycode.minecraft.redisbungee.api.tasks.RedisTask;
@@ -47,7 +48,7 @@ public class RedisBungeeBungeeListener extends AbstractRedisBungeeListener<Login
     }
 
     @Override
-    @EventHandler (priority = HIGHEST)
+    @EventHandler(priority = HIGHEST)
     public void onLogin(LoginEvent event) {
         event.registerIntent((Plugin) plugin);
         plugin.executeAsync(new RedisTask<Void>(plugin) {
@@ -57,27 +58,17 @@ public class RedisBungeeBungeeListener extends AbstractRedisBungeeListener<Login
                     if (event.isCancelled()) {
                         return null;
                     }
-
+                    if (plugin.getConfiguration().restoreOldKickBehavior()) {
-                    // We make sure they aren't trying to use an existing player's name.
+                        for (String s : plugin.getProxiesIds()) {
-                    // This is problematic for online-mode servers as they always disconnect old clients.
+                            if (unifiedJedis.sismember("proxy:" + s + ":usersOnline", event.getConnection().getUniqueId().toString())) {
-                    if (plugin.isOnlineMode()) {
+                                event.setCancelled(true);
-                        ProxiedPlayer player = (ProxiedPlayer) plugin.getPlayer(event.getConnection().getName());
+                                event.setCancelReason(plugin.getConfiguration().getMessages().get(RedisBungeeConfiguration.MessageType.ALREADY_LOGGED_IN));
-
+                                return null;
-                        if (player != null) {
+                            }
-                            event.setCancelled(true);
-                            // TODO: Make it accept a BaseComponent[] like everything else.
-                            event.setCancelReason(ONLINE_MODE_RECONNECT);
-                            return null;
-                        }
-                    }
-
-                    for (String s : plugin.getProxiesIds()) {
-                        if (unifiedJedis.sismember("proxy:" + s + ":usersOnline", event.getConnection().getUniqueId().toString())) {
-                            event.setCancelled(true);
-                            // TODO: Make it accept a BaseComponent[] like everything else.
-                            event.setCancelReason(ALREADY_LOGGED_IN);
-                            return null;
                         }
+                    } else if (api.isPlayerOnline(event.getConnection().getUniqueId())) {
+                        PlayerUtils.setKickedOtherLocation(event.getConnection().getUniqueId().toString(), unifiedJedis);
+                        api.kickPlayer(event.getConnection().getUniqueId(), plugin.getConfiguration().getMessages().get(RedisBungeeConfiguration.MessageType.LOGGED_IN_OTHER_LOCATION));
                     }
                     return null;
                 } finally {

RedisBungee-Velocity/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>RedisBungee</artifactId>
         <groupId>com.imaginarycode.minecraft</groupId>
-        <version>0.8.1-SNAPSHOT</version>
+        <version>0.10.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

RedisBungee-Velocity/src/main/java/com/imaginarycode/minecraft/redisbungee/RedisBungeeVelocityListener.java

@@ -17,6 +17,7 @@ import com.google.common.io.ByteArrayDataInput;
 import com.google.common.io.ByteArrayDataOutput;
 import com.google.common.io.ByteStreams;
 import com.imaginarycode.minecraft.redisbungee.api.AbstractRedisBungeeListener;
+import com.imaginarycode.minecraft.redisbungee.api.config.RedisBungeeConfiguration;
 import com.imaginarycode.minecraft.redisbungee.api.util.player.PlayerUtils;
 import com.imaginarycode.minecraft.redisbungee.api.RedisBungeePlugin;
 import com.imaginarycode.minecraft.redisbungee.api.tasks.RedisTask;
@@ -36,6 +37,7 @@ import com.velocitypowered.api.event.proxy.ProxyPingEvent;
 import com.velocitypowered.api.proxy.Player;
 import com.velocitypowered.api.proxy.ServerConnection;
 import com.velocitypowered.api.proxy.server.ServerPing;
+import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
 import redis.clients.jedis.UnifiedJedis;
 
@@ -54,7 +56,7 @@ public class RedisBungeeVelocityListener extends AbstractRedisBungeeListener<Log
         super(plugin, exemptAddresses);
     }
 
-    @Subscribe (order = PostOrder.LAST)
+    @Subscribe(order = PostOrder.LAST)
     public void onLogin(LoginEvent event, Continuation continuation) {
         plugin.executeAsync(new RedisTask<Void>(plugin) {
             @Override
@@ -63,23 +65,18 @@ public class RedisBungeeVelocityListener extends AbstractRedisBungeeListener<Log
                     if (!event.getResult().isAllowed()) {
                         return null;
                     }
+                    if (plugin.getConfiguration().restoreOldKickBehavior()) {
 
-                    // We make sure they aren't trying to use an existing player's name.
+                        for (String s : plugin.getProxiesIds()) {
-                    // This is problematic for online-mode servers as they always disconnect old clients.
+                            if (unifiedJedis.sismember("proxy:" + s + ":usersOnline", event.getPlayer().getUniqueId().toString())) {
-                    if (plugin.isOnlineMode()) {
+                                event.setResult(ResultedEvent.ComponentResult.denied(serializer.deserialize(plugin.getConfiguration().getMessages().get(RedisBungeeConfiguration.MessageType.ALREADY_LOGGED_IN))));
-                        Player player = (Player) plugin.getPlayer(event.getPlayer().getUsername());
+                                return null;
-
+                            }
-                        if (player != null) {
-                            event.setResult(ResultedEvent.ComponentResult.denied(serializer.deserialize(ONLINE_MODE_RECONNECT)));
-                            return null;
                         }
-                    }
 
-                    for (String s : plugin.getProxiesIds()) {
+                    } else if (api.isPlayerOnline(event.getPlayer().getUniqueId())) {
-                        if (unifiedJedis.sismember("proxy:" + s + ":usersOnline", event.getPlayer().getUniqueId().toString())) {
+                        PlayerUtils.setKickedOtherLocation(event.getPlayer().getUniqueId().toString(), unifiedJedis);
-                            event.setResult(ResultedEvent.ComponentResult.denied(serializer.deserialize(ALREADY_LOGGED_IN)));
+                        api.kickPlayer(event.getPlayer().getUniqueId(), plugin.getConfiguration().getMessages().get(RedisBungeeConfiguration.MessageType.LOGGED_IN_OTHER_LOCATION));
-                            return null;
-                        }
                     }
                     return null;
                 } finally {
@@ -146,7 +143,7 @@ public class RedisBungeeVelocityListener extends AbstractRedisBungeeListener<Log
     @Override
     @Subscribe
     public void onPluginMessage(PluginMessageEvent event) {
-        if(!(event.getSource() instanceof ServerConnection) || !RedisBungeeVelocityPlugin.IDENTIFIERS.contains(event.getIdentifier())) {
+        if (!(event.getSource() instanceof ServerConnection) || !RedisBungeeVelocityPlugin.IDENTIFIERS.contains(event.getIdentifier())) {
             return;
         }
 
@@ -174,8 +171,8 @@ public class RedisBungeeVelocityListener extends AbstractRedisBungeeListener<Log
                         }
                     }
                     Set<String> players = original.stream()
-                        .map(uuid -> plugin.getUuidTranslator().getNameFromUuid(uuid, false))
+                            .map(uuid -> plugin.getUuidTranslator().getNameFromUuid(uuid, false))
-                        .collect(Collectors.toSet());
+                            .collect(Collectors.toSet());
                     out.writeUTF(Joiner.on(',').join(players));
                     break;
                 case "PlayerCount":
@@ -246,7 +243,7 @@ public class RedisBungeeVelocityListener extends AbstractRedisBungeeListener<Log
 
             ((ServerConnection) event.getSource()).sendPluginMessage(event.getIdentifier(), out.toByteArray());
         });
-        
+
     }
 
 
@@ -258,7 +255,7 @@ public class RedisBungeeVelocityListener extends AbstractRedisBungeeListener<Log
             if (message.startsWith("/"))
                 message = message.substring(1);
             plugin.logInfo("Invoking command via PubSub: /" + message);
-            ((RedisBungeeVelocityPlugin)plugin).getProxy().getCommandManager().executeAsync(RedisBungeeCommandSource.getSingleton(), message);
+            ((RedisBungeeVelocityPlugin) plugin).getProxy().getCommandManager().executeAsync(RedisBungeeCommandSource.getSingleton(), message);
 
         }
     }

pom.xml

@@ -7,7 +7,7 @@
     <groupId>com.imaginarycode.minecraft</groupId>
     <artifactId>RedisBungee</artifactId>
     <packaging>pom</packaging>
-    <version>0.8.1-SNAPSHOT</version>
+    <version>0.10.0-SNAPSHOT</version>
     <build>
         <plugins>
             <plugin>