Implement ConsecutiveExecutor

common/src/main/java/me/lucko/luckperms/LuckPermsPlugin.java

@@ -24,6 +24,7 @@ package me.lucko.luckperms;
 
 import me.lucko.luckperms.api.Logger;
 import me.lucko.luckperms.api.implementation.ApiProvider;
+import me.lucko.luckperms.commands.ConsecutiveExecutor;
 import me.lucko.luckperms.commands.Sender;
 import me.lucko.luckperms.constants.Message;
 import me.lucko.luckperms.core.LPConfiguration;
@@ -57,6 +58,7 @@ public interface LuckPermsPlugin {
     UuidCache getUuidCache();
     ApiProvider getApiProvider();
     Importer getImporter();
+    ConsecutiveExecutor getConsecutiveExecutor();
 
     /**
      * @return the version of the plugin

common/src/main/java/me/lucko/luckperms/commands/CommandManager.java

@@ -33,10 +33,7 @@ import me.lucko.luckperms.commands.group.GroupMainCommand;
 import me.lucko.luckperms.commands.group.ListGroups;
 import me.lucko.luckperms.commands.log.LogMainCommand;
 import me.lucko.luckperms.commands.migration.MigrationMainCommand;
-import me.lucko.luckperms.commands.misc.DebugCommand;
-import me.lucko.luckperms.commands.misc.ImportCommand;
-import me.lucko.luckperms.commands.misc.InfoCommand;
-import me.lucko.luckperms.commands.misc.SyncCommand;
+import me.lucko.luckperms.commands.misc.*;
 import me.lucko.luckperms.commands.track.CreateTrack;
 import me.lucko.luckperms.commands.track.DeleteTrack;
 import me.lucko.luckperms.commands.track.ListTracks;
@@ -64,6 +61,7 @@ public class CommandManager {
             .add(new InfoCommand())
             .add(new DebugCommand())
             .add(new ImportCommand())
+            .add(new QueueCommand())
             .add(new MigrationMainCommand())
             .add(new CreateGroup())
             .add(new DeleteGroup())

common/src/main/java/me/lucko/luckperms/commands/ConsecutiveExecutor.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2016 Lucko (Luck) <luck@lucko.me>
+ *
+ *  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.commands;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Executes commands consecutively
+ */
+@RequiredArgsConstructor
+public class ConsecutiveExecutor implements Runnable {
+    private final CommandManager manager;
+
+    private final List<QueuedCommand> commands = new ArrayList<>();
+
+    public void queueCommand(QueuedCommand command) {
+        synchronized (commands) {
+            commands.add(command);
+        }
+    }
+
+    @Override
+    public void run() {
+        final List<QueuedCommand> toExecute = new ArrayList<>();
+        synchronized (commands) {
+            toExecute.addAll(commands);
+            commands.clear();
+        }
+
+        if (toExecute.isEmpty()) {
+            return;
+        }
+
+        for (QueuedCommand command : toExecute) {
+            manager.onCommand(command.getSender(), "perms", command.getArgs());
+        }
+
+    }
+
+    @Getter
+    @AllArgsConstructor
+    public static class QueuedCommand {
+        private final Sender sender;
+        private final List<String> args;
+    }
+
+}

common/src/main/java/me/lucko/luckperms/commands/misc/QueueCommand.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2016 Lucko (Luck) <luck@lucko.me>
+ *
+ *  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.commands.misc;
+
+import me.lucko.luckperms.LuckPermsPlugin;
+import me.lucko.luckperms.commands.CommandResult;
+import me.lucko.luckperms.commands.ConsecutiveExecutor;
+import me.lucko.luckperms.commands.Sender;
+import me.lucko.luckperms.commands.SingleMainCommand;
+import me.lucko.luckperms.constants.Constants;
+import me.lucko.luckperms.constants.Permission;
+
+import java.util.List;
+
+public class QueueCommand extends SingleMainCommand {
+    public QueueCommand() {
+        super("QueueCommand", "/%s queuecommand <command args...>", 1, Permission.MIGRATION);
+    }
+
+    @Override
+    protected CommandResult execute(LuckPermsPlugin plugin, Sender sender, List<String> args, String label) {
+        if (args.get(0).equalsIgnoreCase(getName())) {
+            // Prevent infinite loops
+            return CommandResult.FAILURE;
+        }
+
+        plugin.getConsecutiveExecutor().queueCommand(new ConsecutiveExecutor.QueuedCommand(sender, args));
+        return CommandResult.SUCCESS;
+    }
+
+    @Override
+    protected boolean isAuthorized(Sender sender) {
+        return sender.getUuid().equals(Constants.getConsoleUUID());
+    }
+}

common/src/main/java/me/lucko/luckperms/data/Importer.java

@@ -38,7 +38,7 @@ import java.util.*;
 import java.util.stream.Collectors;
 
 /**
- * Executes a list of commands sequentially in a single thread.
+ * Class to handle import operations
  */
 @RequiredArgsConstructor
 public class Importer {