Add option to use the servers uuid cache/lookup facility (#354)

bungee/src/main/java/me/lucko/luckperms/bungee/LPBungeePlugin.java

@@ -32,6 +32,7 @@ import me.lucko.luckperms.api.Logger;
 import me.lucko.luckperms.api.PlatformType;
 import me.lucko.luckperms.api.context.ContextSet;
 import me.lucko.luckperms.bungee.messaging.BungeeMessagingService;
+import me.lucko.luckperms.bungee.util.RedisBungeeUtil;
 import me.lucko.luckperms.common.api.ApiHandler;
 import me.lucko.luckperms.common.api.ApiProvider;
 import me.lucko.luckperms.common.caching.handlers.CachedStateManager;
@@ -80,6 +81,7 @@ import java.io.InputStream;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Optional;
 import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
@@ -305,6 +307,19 @@ public class LPBungeePlugin extends Plugin implements LuckPermsPlugin {
         return getProxy().getPlayer(uuidCache.getExternalUUID(user.getUuid()));
     }
 
+    @Override
+    public Optional<UUID> lookupUuid(String username) {
+        if (getProxy().getPluginManager().getPlugin("RedisBungee") != null) {
+            try {
+                return RedisBungeeUtil.lookupUuid(username);
+            } catch (Throwable t) {
+                t.printStackTrace();
+            }
+        }
+
+        return Optional.empty();
+    }
+
     @Override
     public Contexts getContextForUser(User user) {
         ProxiedPlayer player = getPlayer(user);

bungee/src/main/java/me/lucko/luckperms/bungee/util/RedisBungeeUtil.java

@@ -0,0 +1,48 @@
+/*
+ * This file is part of LuckPerms, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <luck@lucko.me>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package me.lucko.luckperms.bungee.util;
+
+import lombok.experimental.UtilityClass;
+
+import com.imaginarycode.minecraft.redisbungee.RedisBungee;
+
+import java.util.Optional;
+import java.util.UUID;
+
+@UtilityClass
+public class RedisBungeeUtil {
+
+    /**
+     * Looks up a UUID from username via RedisBungee's uuid cache.
+     *
+     * @param username the username to lookup
+     * @return a uuid, if present
+     */
+    public static Optional<UUID> lookupUuid(String username) {
+        return Optional.ofNullable(RedisBungee.getApi()).flatMap(a -> Optional.ofNullable(a.getUuidFromName(username, true)));
+    }
+
+}

bungee/src/main/resources/config.yml

@@ -66,6 +66,13 @@ apply-global-world-groups: true
 # forwarding.
 use-server-uuids: true
 
+# If the servers own UUID cache/lookup facility should be used when there is no record for a player
+# in the LuckPerms cache.
+#
+# Since BungeeCord doesn't maintain it's own UUID cache, when this option is true, LuckPerms will
+# try to find a uuid for a username using RedisBungee, if installed.
+use-server-uuid-cache: false
+
 # If the plugin should send log notifications to users whenever permissions are modified.
 log-notify: true
 

bungee/src/main/resources/plugin.yml

@@ -3,3 +3,4 @@ version: ${full.version}
 description: A permissions plugin
 author: Luck
 main: me.lucko.luckperms.bungee.LPBungeePlugin
+softDepends: ["RedisBungee"]