Merge branch 'v6' into feature/v6/pipeline-queue

# Conflicts:
#	Bukkit/src/main/java/com/plotsquared/bukkit/BukkitPlatform.java
#	Bukkit/src/main/java/com/plotsquared/bukkit/inject/BukkitModule.java
#	Bukkit/src/main/java/com/plotsquared/bukkit/util/BukkitUtil.java
#	Core/src/main/java/com/plotsquared/core/queue/BasicLocalBlockQueue.java

Bukkit/build.gradle

@@ -106,6 +106,8 @@ shadowJar {
         include(dependency("javax.annotation:javax-annotation-api"))
         include(dependency('org.apache.logging.log4j:log4j-slf4j-impl'))
         include(dependency('org.slf4j:slf4j-api'))
+        include(dependency('javax.inject:javax.inject:1'))
+        include(dependency('aopalliance:aopalliance:1.0'))
     }
 
     relocate('net.kyori.text', 'com.plotsquared.formatting.text')

Bukkit/src/main/java/com/plotsquared/bukkit/BukkitPlatform.java

@@ -34,6 +34,7 @@ import com.google.inject.TypeLiteral;
 import com.plotsquared.bukkit.generator.BukkitPlotGenerator;
 import com.plotsquared.bukkit.inject.BackupModule;
 import com.plotsquared.bukkit.inject.BukkitModule;
+import com.plotsquared.bukkit.inject.PermissionModule;
 import com.plotsquared.bukkit.inject.WorldManagerModule;
 import com.plotsquared.bukkit.listener.ChunkListener;
 import com.plotsquared.bukkit.listener.EntitySpawnListener;
@@ -103,7 +104,6 @@ import com.plotsquared.core.util.ConsoleColors;
 import com.plotsquared.core.util.EconHandler;
 import com.plotsquared.core.util.EventDispatcher;
 import com.plotsquared.core.util.FileUtils;
-import com.plotsquared.core.util.PermHandler;
 import com.plotsquared.core.util.PlatformWorldManager;
 import com.plotsquared.core.util.PlayerManager;
 import com.plotsquared.core.util.PremiumVerification;
@@ -123,7 +123,6 @@ import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.Chunk;
 import org.bukkit.Location;
-import org.bukkit.OfflinePlayer;
 import org.bukkit.World;
 import org.bukkit.command.PluginCommand;
 import org.bukkit.entity.Entity;
@@ -184,7 +183,6 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
     private boolean methodUnloadSetup = false;
     private boolean metricsStarted;
     private EconHandler econ;
-    private PermHandler perm;
 
     @Getter private Injector injector;
 
@@ -249,9 +247,11 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
 
         // We create the injector after PlotSquared has been initialized, so that we have access
         // to generated instances and settings
-        this.injector = Guice
-            .createInjector(Stage.PRODUCTION, new WorldManagerModule(), new PlotSquaredModule(),
-                new BukkitModule(this), new BackupModule());
+        this.injector = Guice.createInjector(Stage.PRODUCTION, new PermissionModule(),
+            new WorldManagerModule(),
+            new PlotSquaredModule(),
+            new BukkitModule(this),
+            new BackupModule());
         this.injector.injectMembers(this);
 
         if (PremiumVerification.isPremium() && Settings.Enabled_Components.UPDATE_NOTIFICATIONS) {
@@ -344,10 +344,7 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
         // Economy
         if (Settings.Enabled_Components.ECONOMY) {
             TaskManager.runTask(() -> {
-                final PermHandler permHandler = getInjector().getInstance(PermHandler.class);
-                if (permHandler != null) {
-                    permHandler.init();
-                }
+                this.getPermissionHandler().initialize();
                 final EconHandler econHandler = getInjector().getInstance(EconHandler.class);
                 if (econHandler != null) {
                     econHandler.init();
@@ -589,7 +586,8 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
                 }
                 final Plot plot = area.getOwnedPlot(id);
                 if (plot != null) {
-                    if (!plot.getFlag(ServerPlotFlag.class) || PlotPlayer.wrap(plot.getOwner()) == null) {
+                    if (!plot.getFlag(ServerPlotFlag.class) || PlotSquared.platform().getPlayerManager()
+                        .getPlayerIfExists(plot.getOwner()) == null) {
                         if (world.getKeepSpawnInMemory()) {
                             world.setKeepSpawnInMemory(false);
                             return;
@@ -1104,39 +1102,6 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
         }
     }
 
-    /**
-     * Attempt to retrieve a {@link PlotPlayer} from a player identifier.
-     * This method accepts:
-     * - {@link Player} objects,
-     * - {@link OfflinePlayer} objects,
-     * - {@link String} usernames for online players, and
-     * - {@link UUID} UUIDs for online players
-     * <p>
-     * In the case of offline players, a fake {@link Player} instance will be created.
-     * This is a rather expensive operation, and should be avoided if possible.
-     *
-     * @param player The player to convert to a PlotPlayer
-     * @return The plot player instance that corresponds to the identifier, or null
-     * if no such player object could be created
-     */
-    @Override @Nullable public PlotPlayer<Player> wrapPlayer(final Object player) {
-        if (player instanceof Player) {
-            return BukkitUtil.adapt((Player) player);
-        }
-        if (player instanceof OfflinePlayer) {
-            return BukkitUtil.adapt((OfflinePlayer) player);
-        }
-        if (player instanceof String) {
-            return (PlotPlayer<Player>) PlotSquared.platform().getPlayerManager()
-                .getPlayerIfExists((String) player);
-        }
-        if (player instanceof UUID) {
-            return (PlotPlayer<Player>) PlotSquared.platform().getPlayerManager()
-                .getPlayerIfExists((UUID) player);
-        }
-        return null;
-    }
-
     @Override public String getNMSPackage() {
         final String name = Bukkit.getServer().getClass().getPackage().getName();
         return name.substring(name.lastIndexOf('.') + 1);
@@ -1173,8 +1138,9 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
         return getInjector().getInstance(Key.get(new TypeLiteral<PlatformWorldManager<World>>() {}));
     }
 
-    @Override @Nonnull public PlayerManager<? extends PlotPlayer<Player>, ? extends Player> getPlayerManager() {
-        return getInjector().getInstance(Key.get(new TypeLiteral<PlayerManager<BukkitPlayer, Player>>() {}));
+    @Override @Nonnull @SuppressWarnings("ALL")
+    public PlayerManager<? extends PlotPlayer<Player>, ? extends Player> getPlayerManager() {
+        return (PlayerManager<BukkitPlayer, Player>) getInjector().getInstance(PlayerManager.class);
     }
 
 }

Bukkit/src/main/java/com/plotsquared/bukkit/inject/BukkitModule.java

@@ -26,8 +26,9 @@
 package com.plotsquared.bukkit.inject;
 
 import com.google.inject.AbstractModule;
+import com.google.inject.Provides;
+import com.google.inject.Singleton;
 import com.google.inject.assistedinject.FactoryModuleBuilder;
-import com.google.inject.util.Providers;
 import com.plotsquared.bukkit.BukkitPlatform;
 import com.plotsquared.bukkit.player.BukkitPlayerManager;
 import com.plotsquared.bukkit.queue.BukkitChunkCoordinator;
@@ -36,7 +37,6 @@ import com.plotsquared.bukkit.schematic.BukkitSchematicHandler;
 import com.plotsquared.bukkit.util.BukkitChunkManager;
 import com.plotsquared.bukkit.util.BukkitEconHandler;
 import com.plotsquared.bukkit.util.BukkitInventoryUtil;
-import com.plotsquared.bukkit.util.BukkitPermHandler;
 import com.plotsquared.bukkit.util.BukkitRegionManager;
 import com.plotsquared.bukkit.util.BukkitSetupUtils;
 import com.plotsquared.bukkit.util.BukkitUtil;
@@ -58,7 +58,6 @@ import com.plotsquared.core.queue.QueueProvider;
 import com.plotsquared.core.util.ChunkManager;
 import com.plotsquared.core.util.EconHandler;
 import com.plotsquared.core.util.InventoryUtil;
-import com.plotsquared.core.util.PermHandler;
 import com.plotsquared.core.util.PlayerManager;
 import com.plotsquared.core.util.RegionManager;
 import com.plotsquared.core.util.SchematicHandler;
@@ -72,6 +71,7 @@ import org.bukkit.command.ConsoleCommandSender;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 @RequiredArgsConstructor
 public class BukkitModule extends AbstractModule {
@@ -98,7 +98,6 @@ public class BukkitModule extends AbstractModule {
         bind(ChunkManager.class).to(BukkitChunkManager.class);
         bind(RegionManager.class).to(BukkitRegionManager.class);
         bind(SchematicHandler.class).to(BukkitSchematicHandler.class);
-        this.setupVault();
         if (Settings.Enabled_Components.WORLDS) {
             bind(PlotAreaManager.class).to(SinglePlotAreaManager.class);
         } else {
@@ -111,26 +110,14 @@ public class BukkitModule extends AbstractModule {
         install(new FactoryModuleBuilder().build(ChunkCoordinatorBuilderFactory.class));
     }
 
-    private void setupVault() {
+    @Provides @Singleton @Nullable EconHandler provideEconHandler() {
         if (Bukkit.getPluginManager().isPluginEnabled("Vault")) {
-            BukkitPermHandler bukkitPermHandler = null;
             try {
-                bukkitPermHandler = new BukkitPermHandler();
-                bind(PermHandler.class).toInstance(bukkitPermHandler);
+                return new BukkitEconHandler();
             } catch (final Exception ignored) {
-                bind(PermHandler.class).toProvider(Providers.of(null));
             }
-            try {
-                final BukkitEconHandler bukkitEconHandler =
-                    new BukkitEconHandler(bukkitPermHandler);
-                bind(EconHandler.class).toInstance(bukkitEconHandler);
-            } catch (final Exception ignored) {
-                bind(EconHandler.class).toProvider(Providers.of(null));
-            }
-        } else {
-            bind(PermHandler.class).toProvider(Providers.of(null));
-            bind(EconHandler.class).toProvider(Providers.of(null));
         }
+        return null;
     }
 
 }

Bukkit/src/main/java/com/plotsquared/bukkit/inject/PermissionModule.java

@@ -23,38 +23,26 @@
  *     You should have received a copy of the GNU General Public License
  *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-package com.plotsquared.bukkit.util;
+package com.plotsquared.bukkit.inject;
 
+import com.google.inject.AbstractModule;
+import com.google.inject.Provides;
 import com.google.inject.Singleton;
-import com.plotsquared.core.util.PermHandler;
-import net.milkbowl.vault.permission.Permission;
+import com.plotsquared.bukkit.permissions.BukkitPermissionHandler;
+import com.plotsquared.bukkit.permissions.VaultPermissionHandler;
+import com.plotsquared.core.permissions.PermissionHandler;
 import org.bukkit.Bukkit;
-import org.bukkit.plugin.RegisteredServiceProvider;
 
-@Singleton public class BukkitPermHandler extends PermHandler {
+public class PermissionModule extends AbstractModule {
 
-    private Permission perms;
-
-    @Override
-    public boolean init() {
-        if (this.perms == null) {
-            setupPermissions();
+    @Provides @Singleton PermissionHandler providePermissionHandler() {
+        try {
+            if (Bukkit.getPluginManager().isPluginEnabled("Vault")) {
+                return new VaultPermissionHandler();
+            }
+        } catch (final Exception ignored) {
         }
-        return this.perms != null;
+        return new BukkitPermissionHandler();
     }
 
-    private void setupPermissions() {
-        if (Bukkit.getServer().getPluginManager().getPlugin("Vault") == null) {
-            return;
-        }
-        RegisteredServiceProvider<Permission> permissionProvider =
-            Bukkit.getServer().getServicesManager().getRegistration(Permission.class);
-        if (permissionProvider != null) {
-            this.perms = permissionProvider.getProvider();
-        }
-    }
-
-    @Override public boolean hasPermission(String world, String player, String perm) {
-        return this.perms.playerHas(world, Bukkit.getOfflinePlayer(player), perm);
-    }
 }

Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEvents.java

@@ -38,6 +38,8 @@ import com.plotsquared.core.database.DBFunc;
 import com.plotsquared.core.listener.PlayerBlockEventType;
 import com.plotsquared.core.listener.PlotListener;
 import com.plotsquared.core.location.Location;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -216,8 +218,8 @@ import org.bukkit.plugin.Plugin;
 import org.bukkit.projectiles.BlockProjectileSource;
 import org.bukkit.projectiles.ProjectileSource;
 import org.bukkit.util.Vector;
-import javax.annotation.Nonnull;
 
+import javax.annotation.Nonnull;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -731,32 +733,36 @@ import java.util.regex.Pattern;
     public void onTeleport(PlayerTeleportEvent event) {
         Player player = event.getPlayer();
         BukkitPlayer pp = BukkitUtil.adapt(player);
-        Plot lastPlot = pp.getMeta(PlotPlayer.META_LAST_PLOT);
-        org.bukkit.Location to = event.getTo();
-        //noinspection ConstantConditions
-        if (to != null) {
-            Location location = BukkitUtil.adapt(to);
-            PlotArea area = location.getPlotArea();
-            if (area == null) {
-                if (lastPlot != null) {
-                    plotExit(pp, lastPlot);
-                    pp.deleteMeta(PlotPlayer.META_LAST_PLOT);
+        try (final MetaDataAccess<Plot> lastPlotAccess =
+            pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+            Plot lastPlot = lastPlotAccess.get().orElse(null);
+            org.bukkit.Location to = event.getTo();
+            //noinspection ConstantConditions
+            if (to != null) {
+                Location location = BukkitUtil.adapt(to);
+                PlotArea area = location.getPlotArea();
+                if (area == null) {
+                    if (lastPlot != null) {
+                        plotExit(pp, lastPlot);
+                        lastPlotAccess.remove();
+                    }
+                    try (final MetaDataAccess<Location> lastLocationAccess =
+                        pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LOCATION)) {
+                        lastLocationAccess.remove();
+                    }
+                    return;
                 }
-                pp.deleteMeta(PlotPlayer.META_LOCATION);
-                return;
-            }
-            Plot plot = area.getPlot(location);
-            if (plot != null) {
-                final boolean result = DenyTeleportFlag.allowsTeleport(pp, plot);
-                // there is one possibility to still allow teleportation:
-                // to is identical to the plot's home location, and untrusted-visit is true
-                // i.e. untrusted-visit can override deny-teleport
-                // this is acceptable, because otherwise it wouldn't make sense to have both flags set
-                if (!result && !(plot.getFlag(UntrustedVisitFlag.class) && plot.getHomeSynchronous()
-                    .equals(BukkitUtil.adaptComplete(to)))) {
-                    MainUtil.sendMessage(pp, Captions.NO_PERMISSION_EVENT,
-                        Captions.PERMISSION_ADMIN_ENTRY_DENIED);
-                    event.setCancelled(true);
+                Plot plot = area.getPlot(location);
+                if (plot != null) {
+                    final boolean result = DenyTeleportFlag.allowsTeleport(pp, plot);
+                    // there is one possibility to still allow teleportation:
+                    // to is identical to the plot's home location, and untrusted-visit is true
+                    // i.e. untrusted-visit can override deny-teleport
+                    // this is acceptable, because otherwise it wouldn't make sense to have both flags set
+                    if (!result && !(plot.getFlag(UntrustedVisitFlag.class) && plot.getHomeSynchronous().equals(BukkitUtil.adaptComplete(to)))) {
+                        MainUtil.sendMessage(pp, Captions.NO_PERMISSION_EVENT, Captions.PERMISSION_ADMIN_ENTRY_DENIED);
+                        event.setCancelled(true);
+                    }
                 }
             }
         }
@@ -847,28 +853,39 @@ import java.util.regex.Pattern;
             }
             // Set last location
             Location location = BukkitUtil.adapt(to);
-            pp.setMeta(PlotPlayer.META_LOCATION, location);
+            try (final MetaDataAccess<Location> lastLocationAccess =
+                pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LOCATION)) {
+                lastLocationAccess.remove();
+            }
             PlotArea area = location.getPlotArea();
             if (area == null) {
-                pp.deleteMeta(PlotPlayer.META_LAST_PLOT);
+                try (final MetaDataAccess<Plot> lastPlotAccess =
+                    pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                    lastPlotAccess.remove();
+                }
                 return;
             }
             Plot now = area.getPlot(location);
-            Plot lastPlot = pp.getMeta(PlotPlayer.META_LAST_PLOT);
+            Plot lastPlot;
+            try (final MetaDataAccess<Plot> lastPlotAccess =
+                pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                lastPlot = lastPlotAccess.get().orElse(null);
+            }
             if (now == null) {
-                if (lastPlot != null && !plotExit(pp, lastPlot) && this.tmpTeleport && !pp
-                    .getMeta("kick", false)) {
-                    MainUtil.sendMessage(pp, Captions.NO_PERMISSION_EVENT,
-                        Captions.PERMISSION_ADMIN_EXIT_DENIED);
-                    this.tmpTeleport = false;
-                    if (lastPlot.equals(BukkitUtil.adapt(from).getPlot())) {
-                        player.teleport(from);
-                    } else {
-                        player.teleport(player.getWorld().getSpawnLocation());
+                try (final MetaDataAccess<Boolean> kickAccess =
+                    pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_KICK)) {
+                    if (lastPlot != null && !plotExit(pp, lastPlot) && this.tmpTeleport && !kickAccess.get().orElse(false)) {
+                        MainUtil.sendMessage(pp, Captions.NO_PERMISSION_EVENT, Captions.PERMISSION_ADMIN_EXIT_DENIED);
+                        this.tmpTeleport = false;
+                        if (lastPlot.equals(BukkitUtil.adapt(from).getPlot())) {
+                            player.teleport(from);
+                        } else {
+                            player.teleport(player.getWorld().getSpawnLocation());
+                        }
+                        this.tmpTeleport = true;
+                        event.setCancelled(true);
+                        return;
                     }
-                    this.tmpTeleport = true;
-                    event.setCancelled(true);
-                    return;
                 }
             } else if (now.equals(lastPlot)) {
                 ForceFieldListener.handleForcefield(player, pp, now);
@@ -909,28 +926,39 @@ import java.util.regex.Pattern;
             }
             // Set last location
             Location location = BukkitUtil.adapt(to);
-            pp.setMeta(PlotPlayer.META_LOCATION, location);
+            try (final MetaDataAccess<Location> lastLocationAccess =
+                pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LOCATION)) {
+                lastLocationAccess.set(location);
+            }
             PlotArea area = location.getPlotArea();
             if (area == null) {
-                pp.deleteMeta(PlotPlayer.META_LAST_PLOT);
+                try (final MetaDataAccess<Plot> lastPlotAccess =
+                    pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                    lastPlotAccess.remove();
+                }
                 return;
             }
             Plot now = area.getPlot(location);
-            Plot lastPlot = pp.getMeta(PlotPlayer.META_LAST_PLOT);
+            Plot lastPlot;
+            try (final MetaDataAccess<Plot> lastPlotAccess =
+                pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                lastPlot = lastPlotAccess.get().orElse(null);
+            }
             if (now == null) {
-                if (lastPlot != null && !plotExit(pp, lastPlot) && this.tmpTeleport && !pp
-                    .getMeta("kick", false)) {
-                    MainUtil.sendMessage(pp, Captions.NO_PERMISSION_EVENT,
-                        Captions.PERMISSION_ADMIN_EXIT_DENIED);
-                    this.tmpTeleport = false;
-                    if (lastPlot.equals(BukkitUtil.adapt(from).getPlot())) {
-                        player.teleport(from);
-                    } else {
-                        player.teleport(player.getWorld().getSpawnLocation());
+                try (final MetaDataAccess<Boolean> kickAccess =
+                    pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_KICK)) {
+                    if (lastPlot != null && !plotExit(pp, lastPlot) && this.tmpTeleport && !kickAccess.get().orElse(false)) {
+                        MainUtil.sendMessage(pp, Captions.NO_PERMISSION_EVENT, Captions.PERMISSION_ADMIN_EXIT_DENIED);
+                        this.tmpTeleport = false;
+                        if (lastPlot.equals(BukkitUtil.adapt(from).getPlot())) {
+                            player.teleport(from);
+                        } else {
+                            player.teleport(player.getWorld().getSpawnLocation());
+                        }
+                        this.tmpTeleport = true;
+                        event.setCancelled(true);
+                        return;
                     }
-                    this.tmpTeleport = true;
-                    event.setCancelled(true);
-                    return;
                 }
             } else if (now.equals(lastPlot)) {
                 ForceFieldListener.handleForcefield(player, pp, now);
@@ -1155,8 +1183,15 @@ import java.util.regex.Pattern;
         Player player = event.getPlayer();
         BukkitPlayer pp = BukkitUtil.adapt(player);
         // Delete last location
-        Plot plot = (Plot) pp.deleteMeta(PlotPlayer.META_LAST_PLOT);
-        pp.deleteMeta(PlotPlayer.META_LOCATION);
+        Plot plot;
+        try (final MetaDataAccess<Plot> lastPlotAccess =
+            pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+            plot = lastPlotAccess.remove();
+        }
+        try (final MetaDataAccess<Location> lastLocationAccess =
+            pp.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LOCATION)) {
+            lastLocationAccess.remove();
+        }
         if (plot != null) {
             plotExit(pp, plot);
         }
@@ -1167,9 +1202,6 @@ import java.util.regex.Pattern;
                 }
             }
         }
-        if (Settings.Enabled_Components.PERMISSION_CACHE) {
-            pp.deleteMeta("perm");
-        }
         Location location = pp.getLocation();
         PlotArea area = location.getPlotArea();
         if (location.isPlotArea()) {

Bukkit/src/main/java/com/plotsquared/bukkit/permissions/BukkitPermissionHandler.java

@@ -0,0 +1,86 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.bukkit.permissions;
+
+import com.plotsquared.bukkit.player.BukkitPlayer;
+import com.plotsquared.core.permissions.ConsolePermissionProfile;
+import com.plotsquared.core.permissions.PermissionHandler;
+import com.plotsquared.core.permissions.PermissionProfile;
+import com.plotsquared.core.player.ConsolePlayer;
+import com.plotsquared.core.player.OfflinePlotPlayer;
+import com.plotsquared.core.player.PlotPlayer;
+import org.bukkit.entity.Player;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.lang.ref.WeakReference;
+import java.util.EnumSet;
+import java.util.Optional;
+import java.util.Set;
+
+public class BukkitPermissionHandler implements PermissionHandler {
+
+    @Override public void initialize() {
+    }
+
+    @Nonnull @Override public Optional<PermissionProfile> getPermissionProfile(
+        @Nonnull PlotPlayer<?> playerPlotPlayer) {
+        if (playerPlotPlayer instanceof BukkitPlayer) {
+            final BukkitPlayer bukkitPlayer = (BukkitPlayer) playerPlotPlayer;
+            return Optional.of(new BukkitPermissionProfile(bukkitPlayer.getPlatformPlayer()));
+        } else if (playerPlotPlayer instanceof ConsolePlayer) {
+            return Optional.of(ConsolePermissionProfile.INSTANCE);
+        }
+        return Optional.empty();
+    }
+
+    @Nonnull @Override public Optional<PermissionProfile> getPermissionProfile(
+        @Nonnull OfflinePlotPlayer offlinePlotPlayer) {
+        return Optional.empty();
+    }
+
+    @Nonnull @Override public Set<PermissionHandlerCapability> getCapabilities() {
+        return EnumSet.of(PermissionHandlerCapability.ONLINE_PERMISSIONS);
+    }
+
+
+    private static final class BukkitPermissionProfile implements PermissionProfile {
+
+        private final WeakReference<Player> playerReference;
+
+        private BukkitPermissionProfile(@Nonnull final Player player) {
+            this.playerReference = new WeakReference<>(player);
+        }
+
+        @Override public boolean hasPermission(@Nullable final String world,
+                                               @Nonnull final String permission) {
+            final Player player = this.playerReference.get();
+            return player != null && player.hasPermission(permission);
+        }
+
+    }
+
+}

Bukkit/src/main/java/com/plotsquared/bukkit/permissions/VaultPermissionHandler.java

@@ -0,0 +1,109 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.bukkit.permissions;
+
+import com.plotsquared.bukkit.player.BukkitOfflinePlayer;
+import com.plotsquared.bukkit.player.BukkitPlayer;
+import com.plotsquared.core.permissions.ConsolePermissionProfile;
+import com.plotsquared.core.permissions.PermissionHandler;
+import com.plotsquared.core.permissions.PermissionProfile;
+import com.plotsquared.core.player.ConsolePlayer;
+import com.plotsquared.core.player.OfflinePlotPlayer;
+import com.plotsquared.core.player.PlotPlayer;
+import net.milkbowl.vault.permission.Permission;
+import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.plugin.RegisteredServiceProvider;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.EnumSet;
+import java.util.Optional;
+import java.util.Set;
+
+public class VaultPermissionHandler implements PermissionHandler {
+
+    private Permission permissions;
+
+    @Override public void initialize() {
+        if (Bukkit.getServer().getPluginManager().getPlugin("Vault") == null) {
+            throw new IllegalStateException("Vault is not present on the server");
+        }
+        RegisteredServiceProvider<Permission> permissionProvider =
+            Bukkit.getServer().getServicesManager().getRegistration(Permission.class);
+        if (permissionProvider != null) {
+            this.permissions = permissionProvider.getProvider();
+        }
+    }
+
+    @Nonnull @Override public Optional<PermissionProfile> getPermissionProfile(
+        @Nonnull PlotPlayer<?> playerPlotPlayer) {
+        if (playerPlotPlayer instanceof BukkitPlayer) {
+            final BukkitPlayer bukkitPlayer = (BukkitPlayer) playerPlotPlayer;
+            return Optional.of(new VaultPermissionProfile(bukkitPlayer.getPlatformPlayer()));
+        } else if (playerPlotPlayer instanceof ConsolePlayer) {
+            return Optional.of(ConsolePermissionProfile.INSTANCE);
+        }
+        return Optional.empty();
+    }
+
+    @Nonnull @Override public Optional<PermissionProfile> getPermissionProfile(
+        @Nonnull OfflinePlotPlayer offlinePlotPlayer) {
+        if (offlinePlotPlayer instanceof BukkitOfflinePlayer) {
+            return Optional.of(new VaultPermissionProfile(((BukkitOfflinePlayer) offlinePlotPlayer).player));
+        }
+        return Optional.empty();
+    }
+
+    @Nonnull @Override public Set<PermissionHandlerCapability> getCapabilities() {
+        return EnumSet.of(PermissionHandlerCapability.PER_WORLD_PERMISSIONS,
+                          PermissionHandlerCapability.ONLINE_PERMISSIONS,
+                          PermissionHandlerCapability.OFFLINE_PERMISSIONS);
+    }
+
+
+    private final class VaultPermissionProfile implements PermissionProfile {
+
+        private final OfflinePlayer offlinePlayer;
+
+        private VaultPermissionProfile(@Nonnull final OfflinePlayer offlinePlayer) {
+            this.offlinePlayer = offlinePlayer;
+        }
+
+        @Override public boolean hasPermission(@Nullable final String world,
+                                               @Nonnull final String permission) {
+            if (permissions == null) {
+                return false;
+            }
+            if (world == null && offlinePlayer instanceof BukkitPlayer) {
+                return permissions.playerHas(((BukkitPlayer) offlinePlayer).getPlatformPlayer(), permission);
+            }
+            return permissions.playerHas(world, offlinePlayer, permission);
+        }
+
+    }
+
+}

Bukkit/src/main/java/com/plotsquared/bukkit/player/BukkitOfflinePlayer.java

@@ -25,39 +25,49 @@
  */
 package com.plotsquared.bukkit.player;
 
+import com.plotsquared.core.permissions.NullPermissionProfile;
+import com.plotsquared.core.permissions.PermissionHandler;
+import com.plotsquared.core.permissions.PermissionProfile;
 import com.plotsquared.core.player.OfflinePlotPlayer;
 import org.bukkit.OfflinePlayer;
+
+import javax.annotation.Nonnegative;
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 import java.util.UUID;
 
 public class BukkitOfflinePlayer implements OfflinePlotPlayer {
 
     public final OfflinePlayer player;
+    private final PermissionProfile permissionProfile;
 
     /**
      * Please do not use this method. Instead use BukkitUtil.getPlayer(Player),
      * as it caches player objects.
-     *
-     * @param player
      */
-    public BukkitOfflinePlayer(OfflinePlayer player) {
+    public BukkitOfflinePlayer(@Nonnull final OfflinePlayer player, @Nonnull final
+        PermissionHandler permissionHandler) {
         this.player = player;
+        this.permissionProfile = permissionHandler.getPermissionProfile(this)
+            .orElse(NullPermissionProfile.INSTANCE);
     }
 
     @Nonnull @Override public UUID getUUID() {
         return this.player.getUniqueId();
     }
 
-    @Override public long getLastPlayed() {
-        return this.player.getLastPlayed();
-    }
-
-    @Override public boolean isOnline() {
-        return this.player.isOnline();
+    @Override @Nonnegative public long getLastPlayed() {
+        return this.player.getLastSeen();
     }
 
     @Override public String getName() {
         return this.player.getName();
     }
+
+    @Override public boolean hasPermission(@Nullable final String world,
+                                           @Nonnull final String permission) {
+        return this.permissionProfile.hasPermission(world, permission);
+    }
+
 }

Bukkit/src/main/java/com/plotsquared/bukkit/player/BukkitPlayer.java

@@ -32,6 +32,7 @@ import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.configuration.Settings;
 import com.plotsquared.core.events.TeleportCause;
 import com.plotsquared.core.location.Location;
+import com.plotsquared.core.permissions.PermissionHandler;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.PlotWeather;
 import com.plotsquared.core.plot.world.PlotAreaManager;
@@ -53,6 +54,8 @@ import org.bukkit.event.EventException;
 import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.permissions.PermissionAttachmentInfo;
 import org.bukkit.plugin.RegisteredListener;
+
+import javax.annotation.Nonnegative;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
@@ -69,13 +72,11 @@ import static com.sk89q.worldedit.world.gamemode.GameModes.SURVIVAL;
 public class BukkitPlayer extends PlotPlayer<Player> {
 
     private static boolean CHECK_EFFECTIVE = true;
-
-    private final EconHandler econHandler;
     public final Player player;
-    private boolean offline;
+    private final EconHandler econHandler;
     private String name;
-
-
+    private String lastMessage = "";
+    private long lastMessageTime = 0L;
     /**
      * <p>Please do not use this method. Instead use
      * BukkitUtil.getPlayer(Player), as it caches player objects.</p>
@@ -83,21 +84,16 @@ public class BukkitPlayer extends PlotPlayer<Player> {
      * @param player Bukkit player instance
      */
     public BukkitPlayer(@Nonnull final PlotAreaManager plotAreaManager, @Nonnull final EventDispatcher eventDispatcher,
-        @Nonnull final Player player, @Nullable final EconHandler econHandler) {
-        this(plotAreaManager, eventDispatcher, player, false, econHandler);
-    }
-
-    public BukkitPlayer(@Nonnull final PlotAreaManager plotAreaManager, @Nonnull final EventDispatcher eventDispatcher,
-        @Nonnull final Player player, final boolean offline, @Nullable final EconHandler econHandler) {
-        this(plotAreaManager, eventDispatcher, player, offline, true, econHandler);
+        @Nonnull final Player player, @Nullable final EconHandler econHandler, @Nonnull final PermissionHandler permissionHandler) {
+        this(plotAreaManager, eventDispatcher, player, false, econHandler, permissionHandler);
     }
 
     public BukkitPlayer(@Nonnull final PlotAreaManager plotAreaManager, @Nonnull final
-        EventDispatcher eventDispatcher, @Nonnull final Player player, final boolean offline,
-        final boolean realPlayer, @Nullable final EconHandler econHandler) {
-        super(plotAreaManager, eventDispatcher, econHandler);
+        EventDispatcher eventDispatcher, @Nonnull final Player player,
+        final boolean realPlayer, @Nullable final EconHandler econHandler,
+        @Nonnull final PermissionHandler permissionHandler) {
+        super(plotAreaManager, eventDispatcher, econHandler, permissionHandler);
         this.player = player;
-        this.offline = offline;
         this.econHandler = econHandler;
         if (realPlayer) {
             super.populatePersistentMetaMap();
@@ -125,8 +121,8 @@ public class BukkitPlayer extends PlotPlayer<Player> {
         return player.getUniqueId();
     }
 
-    @Override public long getLastPlayed() {
-        return this.player.getLastPlayed();
+    @Override @Nonnegative public long getLastPlayed() {
+        return this.player.getLastSeen();
     }
 
     @Override public boolean canTeleport(@Nonnull final Location location) {
@@ -161,14 +157,8 @@ public class BukkitPlayer extends PlotPlayer<Player> {
         }
     }
 
-    @Override public boolean hasPermission(final String permission) {
-        if (this.offline && this.econHandler != null) {
-            return this.econHandler.hasPermission(getName(), permission);
-        }
-        return this.player.hasPermission(permission);
-    }
-
-    @Override public int hasPermissionRange(final String stub, final int range) {
+    @Override @Nonnegative public int hasPermissionRange(@Nonnull final String stub,
+                                            @Nonnegative final int range) {
         if (hasPermission(Captions.PERMISSION_ADMIN.getTranslated())) {
             return Integer.MAX_VALUE;
         }
@@ -228,16 +218,12 @@ public class BukkitPlayer extends PlotPlayer<Player> {
         return max;
     }
 
-    @Override public boolean isPermissionSet(final String permission) {
-        return this.player.isPermissionSet(permission);
-    }
-
     @Override public void sendMessage(String message) {
         message = message.replace('\u2010', '%').replace('\u2020', '&').replace('\u2030', '&');
-        if (!StringMan.isEqual(this.getMeta("lastMessage"), message) || (
-            System.currentTimeMillis() - this.<Long>getMeta("lastMessageTime") > 5000)) {
-            setMeta("lastMessage", message);
-            setMeta("lastMessageTime", System.currentTimeMillis());
+        if (!StringMan.isEqual(this.lastMessage, message) || (
+            System.currentTimeMillis() - this.lastMessageTime > 5000)) {
+            this.lastMessage = message;
+            this.lastMessageTime = System.currentTimeMillis();
             this.player.sendMessage(message);
         }
     }
@@ -260,10 +246,6 @@ public class BukkitPlayer extends PlotPlayer<Player> {
         return this.name;
     }
 
-    @Override public boolean isOnline() {
-        return !this.offline && this.player.isOnline();
-    }
-
     @Override public void setCompassTarget(Location location) {
         this.player.setCompassTarget(
             new org.bukkit.Location(BukkitUtil.getWorld(location.getWorldName()), location.getX(),

Bukkit/src/main/java/com/plotsquared/bukkit/player/BukkitPlayerManager.java

@@ -27,6 +27,7 @@ package com.plotsquared.bukkit.player;
 
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
+import com.plotsquared.core.permissions.PermissionHandler;
 import com.plotsquared.core.plot.world.PlotAreaManager;
 import com.plotsquared.core.util.EconHandler;
 import com.plotsquared.core.util.EventDispatcher;
@@ -46,21 +47,26 @@ import java.util.UUID;
     private final PlotAreaManager plotAreaManager;
     private final EventDispatcher eventDispatcher;
     private final EconHandler econHandler;
+    private final PermissionHandler permissionHandler;
 
     @Inject public BukkitPlayerManager(@Nonnull final PlotAreaManager plotAreaManager,
                                        @Nonnull final EventDispatcher eventDispatcher,
-                                       @Nullable final EconHandler econHandler) {
+                                       @Nullable final EconHandler econHandler,
+                                       @Nonnull final PermissionHandler permissionHandler) {
         this.plotAreaManager = plotAreaManager;
         this.eventDispatcher = eventDispatcher;
         this.econHandler = econHandler;
+        this.permissionHandler = permissionHandler;
     }
 
     @Nonnull @Override public BukkitPlayer getPlayer(@Nonnull final Player object) {
+        if (!object.isOnline()) {
+            throw new NoSuchPlayerException(object.getUniqueId());
+        }
         try {
             return getPlayer(object.getUniqueId());
         } catch (final NoSuchPlayerException exception) {
-            return new BukkitPlayer(this.plotAreaManager, this.eventDispatcher, object,
-                object.isOnline(), false, this.econHandler);
+            return new BukkitPlayer(this.plotAreaManager, this.eventDispatcher, object, false, this.econHandler, this.permissionHandler);
         }
     }
 
@@ -69,18 +75,18 @@ import java.util.UUID;
         if (player == null || !player.isOnline()) {
             throw new NoSuchPlayerException(uuid);
         }
-        return new BukkitPlayer(this.plotAreaManager, this.eventDispatcher, player, this.econHandler);
+        return new BukkitPlayer(this.plotAreaManager, this.eventDispatcher, player, this.econHandler, this.permissionHandler);
     }
 
     @Nullable @Override public BukkitOfflinePlayer getOfflinePlayer(@Nullable final UUID uuid) {
         if (uuid == null) {
             return null;
         }
-        return new BukkitOfflinePlayer(Bukkit.getOfflinePlayer(uuid));
+        return new BukkitOfflinePlayer(Bukkit.getOfflinePlayer(uuid), this.permissionHandler);
     }
 
     @Nonnull @Override public BukkitOfflinePlayer getOfflinePlayer(@Nonnull final String username) {
-        return new BukkitOfflinePlayer(Bukkit.getOfflinePlayer(username));
+        return new BukkitOfflinePlayer(Bukkit.getOfflinePlayer(username), this.permissionHandler);
     }
 
 }

Bukkit/src/main/java/com/plotsquared/bukkit/util/BukkitEconHandler.java

@@ -25,31 +25,21 @@
  */
 package com.plotsquared.bukkit.util;
 
-import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import com.plotsquared.bukkit.player.BukkitOfflinePlayer;
 import com.plotsquared.bukkit.player.BukkitPlayer;
 import com.plotsquared.core.player.OfflinePlotPlayer;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.util.EconHandler;
-import com.plotsquared.core.util.PermHandler;
 import net.milkbowl.vault.economy.Economy;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.RegisteredServiceProvider;
-import javax.annotation.Nullable;
 
 @Singleton public class BukkitEconHandler extends EconHandler {
 
     private Economy econ;
 
-    private final PermHandler permHandler;
-
-    @Inject public BukkitEconHandler(@Nullable final PermHandler permHandler) {
-        this.permHandler = permHandler;
-    }
-
-    @Override
-    public boolean init() {
+    @Override public boolean init() {
         if (this.econ == null) {
             setupEconomy();
         }
@@ -87,17 +77,6 @@ import javax.annotation.Nullable;
         this.econ.depositPlayer(((BukkitOfflinePlayer) player).player, amount);
     }
 
-    /**
-     * @deprecated Use {@link PermHandler#hasPermission(String, String, String)} instead
-     */
-    @Deprecated @Override public boolean hasPermission(String world, String player, String perm) {
-        if (this.permHandler != null) {
-            return this.permHandler.hasPermission(world, player, perm);
-        } else {
-            return false;
-        }
-    }
-
     @Override public double getBalance(PlotPlayer<?> player) {
         return this.econ.getBalance(player.getName());
     }

Bukkit/src/main/java/com/plotsquared/bukkit/util/BukkitUtil.java

@@ -51,7 +51,6 @@ import io.papermc.lib.PaperLib;
 import org.bukkit.Bukkit;
 import org.bukkit.Chunk;
 import org.bukkit.Material;
-import org.bukkit.OfflinePlayer;
 import org.bukkit.World;
 import org.bukkit.block.Biome;
 import org.bukkit.block.Block;
@@ -113,25 +112,6 @@ public class BukkitUtil extends WorldUtil {
         LoggerFactory.getLogger("P2/" + BukkitUtil.class.getSimpleName());
     private final Collection<BlockType> tileEntityTypes = new HashSet<>();
 
-    /**
-     * Get a {@link PlotPlayer} from an {@link OfflinePlayer}. If the player is
-     * online, it returns a complete player. If the player is offline, it creates
-     * a fake player
-     *
-     * @param op Offline player
-     * @return Plot player instance
-     */
-    @Nonnull public static PlotPlayer<Player> adapt(@Nonnull final OfflinePlayer op) {
-        if (op.isOnline()) {
-            return adapt(Objects.requireNonNull(op.getPlayer()));
-        }
-        final Player player = OfflinePlayerUtil.loadPlayer(op);
-        player.loadData();
-        return new BukkitPlayer(PlotSquared.get().getPlotAreaManager(),
-            PlotSquared.get().getEventDispatcher(), player, true,
-            PlotSquared.platform().getEconHandler());
-    }
-
     /**
      * Turn a Bukkit {@link Player} into a PlotSquared {@link PlotPlayer}
      *
@@ -213,20 +193,8 @@ public class BukkitUtil extends WorldUtil {
         }
     }
 
-    /**
-     * Gets the PlotPlayer for a UUID. The PlotPlayer is usually cached and
-     * will provide useful functions relating to players.
-     *
-     * @param uuid the uuid to wrap
-     * @return a {@code PlotPlayer}
-     * @see PlotPlayer#wrap(Object)
-     */
-    @Override @Nonnull public PlotPlayer<?> getPlayer(@Nonnull final UUID uuid) {
-        return PlotPlayer.wrap(Bukkit.getOfflinePlayer(uuid));
-    }
-
-    @Override
-    public boolean isBlockSame(@Nonnull final BlockState block1, @Nonnull final BlockState block2) {
+    @Override public boolean isBlockSame(@Nonnull final BlockState block1,
+                                         @Nonnull final BlockState block2) {
         if (block1.equals(block2)) {
             return true;
         }

Bukkit/src/main/java/com/plotsquared/bukkit/util/OfflinePlayerUtil.java

@@ -1,133 +0,0 @@
-/*
- *       _____  _       _    _____                                _
- *      |  __ \| |     | |  / ____|                              | |
- *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
- *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
- *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
- *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
- *                                    | |
- *                                    |_|
- *            PlotSquared plot management system for Minecraft
- *                  Copyright (C) 2020 IntellectualSites
- *
- *     This program is free software: you can redistribute it and/or modify
- *     it under the terms of the GNU General Public License as published by
- *     the Free Software Foundation, either version 3 of the License, or
- *     (at your option) any later version.
- *
- *     This program is distributed in the hope that it will be useful,
- *     but WITHOUT ANY WARRANTY; without even the implied warranty of
- *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *     GNU General Public License for more details.
- *
- *     You should have received a copy of the GNU General Public License
- *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package com.plotsquared.bukkit.util;
-
-import org.bukkit.Bukkit;
-import org.bukkit.OfflinePlayer;
-import org.bukkit.entity.Entity;
-import org.bukkit.entity.Player;
-
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Method;
-import java.util.UUID;
-
-import static com.plotsquared.core.util.ReflectionUtils.callConstructor;
-import static com.plotsquared.core.util.ReflectionUtils.callMethod;
-import static com.plotsquared.core.util.ReflectionUtils.getCbClass;
-import static com.plotsquared.core.util.ReflectionUtils.getField;
-import static com.plotsquared.core.util.ReflectionUtils.getNmsClass;
-import static com.plotsquared.core.util.ReflectionUtils.getUtilClass;
-import static com.plotsquared.core.util.ReflectionUtils.makeConstructor;
-import static com.plotsquared.core.util.ReflectionUtils.makeField;
-import static com.plotsquared.core.util.ReflectionUtils.makeMethod;
-
-public class OfflinePlayerUtil {
-
-    public static Player loadPlayer(OfflinePlayer player) {
-        if (player == null) {
-            return null;
-        }
-        if (player instanceof Player) {
-            return (Player) player;
-        }
-        return loadPlayer(player.getUniqueId(), player.getName());
-    }
-
-    private static Player loadPlayer(UUID id, String name) {
-        Object server = getMinecraftServer();
-        Object interactManager = newPlayerInteractManager();
-        Object worldServer = getWorldServer();
-        Object profile = newGameProfile(id, name);
-        Class<?> entityPlayerClass = getNmsClass("EntityPlayer");
-        Constructor entityPlayerConstructor =
-            makeConstructor(entityPlayerClass, getNmsClass("MinecraftServer"),
-                getNmsClass("WorldServer"), getUtilClass("com.mojang.authlib.GameProfile"),
-                getNmsClass("PlayerInteractManager"));
-        Object entityPlayer =
-            callConstructor(entityPlayerConstructor, server, worldServer, profile, interactManager);
-        return (Player) getBukkitEntity(entityPlayer);
-    }
-
-    private static Object newGameProfile(UUID id, String name) {
-        Class<?> gameProfileClass = getUtilClass("com.mojang.authlib.GameProfile");
-        if (gameProfileClass == null) { //Before uuids
-            return name;
-        }
-        Constructor gameProfileConstructor =
-            makeConstructor(gameProfileClass, UUID.class, String.class);
-        if (gameProfileConstructor == null) { //Version has string constructor
-            gameProfileConstructor = makeConstructor(gameProfileClass, String.class, String.class);
-            return callConstructor(gameProfileConstructor, id.toString(), name);
-        } else { //Version has uuid constructor
-            return callConstructor(gameProfileConstructor, id, name);
-        }
-    }
-
-    private static Object newPlayerInteractManager() {
-        Object worldServer = getWorldServer();
-        Class<?> playerInteractClass = getNmsClass("PlayerInteractManager");
-        Class<?> worldClass = getNmsClass("World");
-        Constructor<?> c = makeConstructor(playerInteractClass, worldClass);
-        if (c == null) {
-            c = makeConstructor(playerInteractClass, getNmsClass("WorldServer"));
-        }
-        return callConstructor(c, worldServer);
-    }
-
-    public static Object getWorldServerNew() {
-        Object server = getMinecraftServer();
-        Class<?> minecraftServerClass = getNmsClass("MinecraftServer");
-        Class<?> dimensionManager = getNmsClass("DimensionManager");
-        Object overworld = getField(makeField(dimensionManager, "OVERWORLD"), null);
-        Method getWorldServer =
-            makeMethod(minecraftServerClass, "getWorldServer", dimensionManager);
-        return callMethod(getWorldServer, server, overworld);
-    }
-
-    private static Object getWorldServer() {
-        Object server = getMinecraftServer();
-        Class<?> minecraftServerClass = getNmsClass("MinecraftServer");
-        Method getWorldServer = makeMethod(minecraftServerClass, "getWorldServer", int.class);
-        Object o;
-        try {
-            o = callMethod(getWorldServer, server, 0);
-        } catch (final RuntimeException e) {
-            o = getWorldServerNew();
-        }
-        return o;
-    }
-
-    //NMS Utils
-
-    private static Object getMinecraftServer() {
-        return callMethod(makeMethod(getCbClass("CraftServer"), "getServer"), Bukkit.getServer());
-    }
-
-    private static Entity getBukkitEntity(Object o) {
-        Method getBukkitEntity = makeMethod(o.getClass(), "getBukkitEntity");
-        return callMethod(getBukkitEntity, o);
-    }
-}

Core/build.gradle

@@ -20,6 +20,8 @@ dependencies {
     compile("com.google.inject:guice:4.2.3")
     compile("com.google.inject.extensions:guice-assistedinject:4.2.3")
     compile group: 'com.google.code.findbugs', name: 'annotations', version: '3.0.1'
+    compile group: 'javax.inject', name: 'javax.inject', version: '1'
+    compile group: 'aopalliance', name: 'aopalliance', version: '1.0'
     // logging
     implementation("org.apache.logging.log4j:log4j-slf4j-impl:2.8.1")
 }

Core/pom.xml

@@ -36,6 +36,18 @@
       <version>3.0.1</version>
       <scope>compile</scope>
     </dependency>
+    <dependency>
+      <groupId>javax.inject</groupId>
+      <artifactId>javax.inject</artifactId>
+      <version>1</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>aopalliance</groupId>
+      <artifactId>aopalliance</artifactId>
+      <version>1.0</version>
+      <scope>compile</scope>
+    </dependency>
     <dependency>
       <groupId>org.projectlombok</groupId>
       <artifactId>lombok</artifactId>

Core/src/main/java/com/plotsquared/core/PlotAPI.java

@@ -39,6 +39,8 @@ import com.plotsquared.core.util.SchematicHandler;
 import com.plotsquared.core.util.query.PlotQuery;
 import lombok.NoArgsConstructor;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.util.Collections;
 import java.util.Set;
 import java.util.UUID;
@@ -178,10 +180,9 @@ import java.util.UUID;
      *
      * @param uuid the uuid of the player to wrap
      * @return a {@code PlotPlayer}
-     * @see PlotPlayer#wrap(Object)
      */
-    public PlotPlayer wrapPlayer(UUID uuid) {
-        return PlotPlayer.wrap(uuid);
+    @Nullable public PlotPlayer<?> wrapPlayer(@Nonnull final UUID uuid) {
+        return PlotSquared.platform().getPlayerManager().getPlayerIfExists(uuid);
     }
 
     /**
@@ -189,10 +190,9 @@ import java.util.UUID;
      *
      * @param player the player to wrap
      * @return a {@code PlotPlayer}
-     * @see PlotPlayer#wrap(Object)
      */
-    public PlotPlayer wrapPlayer(String player) {
-        return PlotPlayer.wrap(player);
+    @Nullable public PlotPlayer<?> wrapPlayer(@Nonnull final String player) {
+        return PlotSquared.platform().getPlayerManager().getPlayerIfExists(player);
     }
 
     /**

Core/src/main/java/com/plotsquared/core/PlotPlatform.java

@@ -27,12 +27,14 @@ package com.plotsquared.core;
 
 import com.google.inject.Injector;
 import com.google.inject.Key;
+import com.google.inject.TypeLiteral;
 import com.plotsquared.core.backup.BackupManager;
 import com.plotsquared.core.generator.GeneratorWrapper;
 import com.plotsquared.core.generator.HybridUtils;
 import com.plotsquared.core.generator.IndependentPlotGenerator;
 import com.plotsquared.core.inject.annotations.DefaultGenerator;
 import com.plotsquared.core.location.World;
+import com.plotsquared.core.permissions.PermissionHandler;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.queue.GlobalBlockQueue;
 import com.plotsquared.core.util.ChatManager;
@@ -79,14 +81,6 @@ public interface PlotPlatform<P> extends ILogger {
      */
     File getWorldContainer();
 
-    /**
-     * Wraps a player into a PlotPlayer object.
-     *
-     * @param player The player to convert to a PlotPlayer
-     * @return A PlotPlayer
-     */
-    @Nullable PlotPlayer<P> wrapPlayer(Object player);
-
     /**
      * Completely shuts down the plugin.
      */
@@ -185,7 +179,7 @@ public interface PlotPlatform<P> extends ILogger {
      * @return Player manager
      */
     @Nonnull default PlayerManager<? extends PlotPlayer<P>, ? extends P> getPlayerManager() {
-        return getInjector().getInstance(PlayerManager.class);
+        return getInjector().getInstance(Key.get(new TypeLiteral<PlayerManager<? extends PlotPlayer<P>, ? extends P>>() {}));
     }
 
     /**
@@ -266,4 +260,13 @@ public interface PlotPlatform<P> extends ILogger {
         return getInjector().getInstance(ChunkManager.class);
     }
 
+    /**
+     * Get the {@link PermissionHandler} implementation for the platform
+     *
+     * @return Permission handler
+     */
+    @Nonnull default PermissionHandler getPermissionHandler() {
+        return getInjector().getInstance(PermissionHandler.class);
+    }
+
 }

Core/src/main/java/com/plotsquared/core/command/Area.java

@@ -79,9 +79,12 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
+import java.util.UUID;
 
 @CommandDeclaration(command = "area",
     permission = "plots.area",
@@ -102,6 +105,8 @@ public class Area extends SubCommand {
     private final RegionManager regionManager;
     private final GlobalBlockQueue blockQueue;
 
+    private final Map<UUID, Map<String, Object>> metaData = new HashMap<>();
+
     @Inject public Area(@Nonnull final PlotAreaManager plotAreaManager,
         @WorldConfig @Nonnull final YamlConfiguration worldConfiguration,
         @WorldFile @Nonnull final File worldFile,
@@ -282,14 +287,16 @@ public class Area extends SubCommand {
                     case 2:
                         switch (args[1].toLowerCase()) {
                             case "pos1": { // Set position 1
-                                HybridPlotWorld area = player.getMeta("area_create_area");
+                                HybridPlotWorld area = (HybridPlotWorld) metaData.computeIfAbsent(player.getUUID(), missingUUID -> new HashMap<>())
+                                    .get("area_create_area");
                                 if (area == null) {
                                     Captions.COMMAND_SYNTAX.send(player,
                                         "/plot area create [world[:id]] [<modifier>=<value>]...");
                                     return false;
                                 }
                                 Location location = player.getLocation();
-                                player.setMeta("area_pos1", location);
+                                metaData.computeIfAbsent(player.getUUID(), missingUUID -> new HashMap<>())
+                                    .put("area_pos1", location);
                                 Captions.SET_ATTRIBUTE.send(player, "area_pos1",
                                     location.getX() + "," + location.getZ());
                                 MainUtil.sendMessage(player,
@@ -298,14 +305,15 @@ public class Area extends SubCommand {
                                 return true;
                             }
                             case "pos2":  // Set position 2 and finish creation for type=2 (partial)
-                                final HybridPlotWorld area = player.getMeta("area_create_area");
+                                final HybridPlotWorld area = (HybridPlotWorld) metaData
+                                    .computeIfAbsent(player.getUUID(), missingUUID -> new HashMap<>()).get("area_create_area");
                                 if (area == null) {
                                     Captions.COMMAND_SYNTAX.send(player,
                                         "/plot area create [world[:id]] [<modifier>=<value>]...");
                                     return false;
                                 }
                                 Location pos1 = player.getLocation();
-                                Location pos2 = player.getMeta("area_pos1");
+                                Location pos2 = (Location) metaData.computeIfAbsent(player.getUUID(), missingUUID -> new HashMap<>()).get("area_pos1");
                                 int dx = Math.abs(pos1.getX() - pos2.getX());
                                 int dz = Math.abs(pos1.getZ() - pos2.getZ());
                                 int numX = Math.max(1,
@@ -521,7 +529,7 @@ public class Area extends SubCommand {
                             player.teleport(this.worldUtil.getSpawn(pa.getWorldName()),
                                 TeleportCause.COMMAND);
                         }
-                        player.setMeta("area_create_area", pa);
+                        metaData.computeIfAbsent(player.getUUID(), missingUUID -> new HashMap<>()).put("area_create_area", pa);
                         MainUtil.sendMessage(player,
                             "$1Go to the first corner and use: $2 " + getCommandString()
                                 + " create pos1");

Core/src/main/java/com/plotsquared/core/command/Auto.java

@@ -26,7 +26,6 @@
 package com.plotsquared.core.command;
 
 import com.google.common.collect.Lists;
-import com.google.common.primitives.Ints;
 import com.google.inject.Inject;
 import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.CaptionUtility;
@@ -37,6 +36,9 @@ import com.plotsquared.core.events.PlayerAutoPlotEvent;
 import com.plotsquared.core.events.PlotAutoMergeEvent;
 import com.plotsquared.core.events.Result;
 import com.plotsquared.core.events.TeleportCause;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
+import com.plotsquared.core.permissions.PermissionHandler;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -91,27 +93,29 @@ public class Auto extends SubCommand {
         }
         int diff = allowedPlots - currentPlots;
         if (diff - sizeX * sizeZ < 0) {
-            if (player.hasPersistentMeta("grantedPlots")) {
-                int grantedPlots = Ints.fromByteArray(player.getPersistentMeta("grantedPlots"));
-                if (diff < 0 && grantedPlots < sizeX * sizeZ) {
-                    MainUtil.sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
-                    return false;
-                } else if (diff >= 0 && grantedPlots + diff < sizeX * sizeZ) {
-                    MainUtil.sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
-                    return false;
-                } else {
-                    int left = grantedPlots + diff < 0 ? 0 : diff - sizeX * sizeZ;
-                    if (left == 0) {
-                        player.removePersistentMeta("grantedPlots");
+            try (final MetaDataAccess<Integer> metaDataAccess = player.accessPersistentMetaData(
+                PlayerMetaDataKeys.PERSISTENT_GRANTED_PLOTS)) {
+                if (metaDataAccess.isPresent()) {
+                    int grantedPlots = metaDataAccess.get().orElse(0);
+                    if (diff < 0 && grantedPlots < sizeX * sizeZ) {
+                        MainUtil.sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
+                        return false;
+                    } else if (diff >= 0 && grantedPlots + diff < sizeX * sizeZ) {
+                        MainUtil.sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
+                        return false;
                     } else {
-                        player.setPersistentMeta("grantedPlots", Ints.toByteArray(left));
+                        int left = grantedPlots + diff < 0 ? 0 : diff - sizeX * sizeZ;
+                        if (left == 0) {
+                            metaDataAccess.remove();
+                        } else {
+                            metaDataAccess.set(left);
+                        }
+                        MainUtil.sendMessage(player, Captions.REMOVED_GRANTED_PLOT, "" + (grantedPlots - left), "" + left);
                     }
-                    MainUtil.sendMessage(player, Captions.REMOVED_GRANTED_PLOT,
-                        "" + (grantedPlots - left), "" + left);
+                } else {
+                    MainUtil.sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
+                    return false;
                 }
-            } else {
-                MainUtil.sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
-                return false;
             }
         }
         return true;
@@ -146,7 +150,10 @@ public class Auto extends SubCommand {
      */
     public static void autoClaimSafe(final PlotPlayer<?> player, final PlotArea area, PlotId start,
         final String schematic) {
-        player.setMeta(Auto.class.getName(), true);
+        try (final MetaDataAccess<Boolean> metaDataAccess =
+            player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_AUTO)) {
+            metaDataAccess.set(true);
+        }
         autoClaimFromDatabase(player, area, start, new RunnableVal<Plot>() {
             @Override public void run(final Plot plot) {
                 try {
@@ -175,9 +182,11 @@ public class Auto extends SubCommand {
     @Override public boolean onCommand(final PlotPlayer<?> player, String[] args) {
         PlotArea plotarea = player.getApplicablePlotArea();
         if (plotarea == null) {
-            if (this.econHandler != null) {
-                for (PlotArea area : this.plotAreaManager.getAllPlotAreas()) {
-                    if (this.econHandler.hasPermission(area.getWorldName(), player.getName(), "plots.auto")) {
+            final PermissionHandler permissionHandler = PlotSquared.platform().getPermissionHandler();
+            if (permissionHandler.hasCapability(
+                PermissionHandler.PermissionHandlerCapability.PER_WORLD_PERMISSIONS)) {
+                for (final PlotArea area : this.plotAreaManager.getAllPlotAreas()) {
+                    if (player.hasPermission(area.getWorldName(), "plots.auto")) {
                         if (plotarea != null) {
                             plotarea = null;
                             break;
@@ -250,9 +259,12 @@ public class Auto extends SubCommand {
             return false;
         }
         final int allowed_plots = player.getAllowedPlots();
-        if (!force && (player.getMeta(Auto.class.getName(), false) || !checkAllowedPlots(player,
-            plotarea, allowed_plots, size_x, size_z))) {
-            return false;
+        try (final MetaDataAccess<Boolean> metaDataAccess =
+            player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_AUTO)) {
+            if (!force && (metaDataAccess.get().orElse(false) || !checkAllowedPlots(player,
+                plotarea, allowed_plots, size_x, size_z))) {
+                return false;
+            }
         }
 
         if (schematic != null && !schematic.isEmpty()) {

Core/src/main/java/com/plotsquared/core/command/Buy.java

@@ -93,7 +93,7 @@ public class Buy extends Command {
 
             this.econHandler.depositMoney(PlotSquared.platform().getPlayerManager().getOfflinePlayer(plot.getOwnerAbs()), price);
 
-            PlotPlayer owner = PlotSquared.platform().getPlayerManager().getPlayerIfExists(plot.getOwnerAbs());
+            PlotPlayer<?> owner = PlotSquared.platform().getPlayerManager().getPlayerIfExists(plot.getOwnerAbs());
             if (owner != null) {
                 Captions.PLOT_SOLD.send(owner, plot.getId(), player.getName(), price);
             }

Core/src/main/java/com/plotsquared/core/command/Claim.java

@@ -25,7 +25,6 @@
  */
 package com.plotsquared.core.command;
 
-import com.google.common.primitives.Ints;
 import com.google.inject.Inject;
 import com.plotsquared.core.configuration.CaptionUtility;
 import com.plotsquared.core.configuration.Captions;
@@ -36,6 +35,8 @@ import com.plotsquared.core.events.PlotMergeEvent;
 import com.plotsquared.core.events.Result;
 import com.plotsquared.core.location.Direction;
 import com.plotsquared.core.location.Location;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -85,54 +86,57 @@ public class Claim extends SubCommand {
         int currentPlots = Settings.Limit.GLOBAL ?
             player.getPlotCount() :
             player.getPlotCount(location.getWorldName());
-        int grants = 0;
-        if (currentPlots >= player.getAllowedPlots() && !force) {
-            if (player.hasPersistentMeta("grantedPlots")) {
-                grants = Ints.fromByteArray(player.getPersistentMeta("grantedPlots"));
-                if (grants <= 0) {
-                    player.removePersistentMeta("grantedPlots");
+
+        final PlotArea area = plot.getArea();
+
+        try (final MetaDataAccess<Integer> metaDataAccess = player.accessPersistentMetaData(PlayerMetaDataKeys.PERSISTENT_GRANTED_PLOTS)) {
+            int grants = 0;
+            if (currentPlots >= player.getAllowedPlots() && !force) {
+                if (metaDataAccess.isPresent()) {
+                    grants = metaDataAccess.get().orElse(0);
+                    if (grants <= 0) {
+                        metaDataAccess.remove();
+                        return sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
+                    }
+                } else {
                     return sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
                 }
-            } else {
-                return sendMessage(player, Captions.CANT_CLAIM_MORE_PLOTS);
             }
-        }
-        if (!plot.canClaim(player)) {
-            return sendMessage(player, Captions.PLOT_IS_CLAIMED);
-        }
-        final PlotArea area = plot.getArea();
-        if (schematic != null && !schematic.isEmpty()) {
-            if (area.isSchematicClaimSpecify()) {
-                if (!area.hasSchematic(schematic)) {
-                    return sendMessage(player, Captions.SCHEMATIC_INVALID,
-                        "non-existent: " + schematic);
-                }
-                if (!Permissions.hasPermission(player, CaptionUtility
-                    .format(player, Captions.PERMISSION_CLAIM_SCHEMATIC.getTranslated(), schematic))
-                    && !Permissions
-                    .hasPermission(player, Captions.PERMISSION_ADMIN_COMMAND_SCHEMATIC) && !force) {
-                    return sendMessage(player, Captions.NO_SCHEMATIC_PERMISSION, schematic);
+
+            if (!plot.canClaim(player)) {
+                return sendMessage(player, Captions.PLOT_IS_CLAIMED);
+            }
+            if (schematic != null && !schematic.isEmpty()) {
+                if (area.isSchematicClaimSpecify()) {
+                    if (!area.hasSchematic(schematic)) {
+                        return sendMessage(player, Captions.SCHEMATIC_INVALID, "non-existent: " + schematic);
+                    }
+                    if (!Permissions.hasPermission(player, CaptionUtility.format(player, Captions.PERMISSION_CLAIM_SCHEMATIC.getTranslated(),
+                        schematic)) && !Permissions.hasPermission(player, Captions.PERMISSION_ADMIN_COMMAND_SCHEMATIC)
+                        && !force) {
+                        return sendMessage(player, Captions.NO_SCHEMATIC_PERMISSION, schematic);
+                    }
                 }
             }
-        }
-        if ((this.econHandler != null) && area.useEconomy() && !force) {
-            Expression<Double> costExr = area.getPrices().get("claim");
-            double cost = costExr.evaluate((double) currentPlots);
-            if (cost > 0d) {
-                if (this.econHandler.getMoney(player) < cost) {
-                    return sendMessage(player, Captions.CANNOT_AFFORD_PLOT, "" + cost);
+            if ((this.econHandler != null) && area.useEconomy() && !force) {
+                Expression<Double> costExr = area.getPrices().get("claim");
+                double cost = costExr.evaluate((double) currentPlots);
+                if (cost > 0d) {
+                    if (this.econHandler.getMoney(player) < cost) {
+                        return sendMessage(player, Captions.CANNOT_AFFORD_PLOT, "" + cost);
+                    }
+                    this.econHandler.withdrawMoney(player, cost);
+                    sendMessage(player, Captions.REMOVED_BALANCE, cost + "");
                 }
-                this.econHandler.withdrawMoney(player, cost);
-                sendMessage(player, Captions.REMOVED_BALANCE, cost + "");
             }
-        }
-        if (grants > 0) {
-            if (grants == 1) {
-                player.removePersistentMeta("grantedPlots");
-            } else {
-                player.setPersistentMeta("grantedPlots", Ints.toByteArray(grants - 1));
+            if (grants > 0) {
+                if (grants == 1) {
+                    metaDataAccess.remove();
+                } else {
+                    metaDataAccess.set(grants - 1);
+                }
+                sendMessage(player, Captions.REMOVED_GRANTED_PLOT, "1", (grants - 1));
             }
-            sendMessage(player, Captions.REMOVED_GRANTED_PLOT, "1", (grants - 1));
         }
         int border = area.getBorder();
         if (border != Integer.MAX_VALUE && plot.getDistanceFromOrigin() > border && !force) {

Core/src/main/java/com/plotsquared/core/command/CmdConfirm.java

@@ -26,19 +26,29 @@
 package com.plotsquared.core.command;
 
 import com.plotsquared.core.configuration.Captions;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.util.MainUtil;
 import com.plotsquared.core.util.task.TaskManager;
 import com.plotsquared.core.util.task.TaskTime;
 
+import javax.annotation.Nullable;
+
 public class CmdConfirm {
 
-    public static CmdInstance getPending(PlotPlayer<?> player) {
-        return player.getMeta("cmdConfirm");
+    @Nullable public static CmdInstance getPending(PlotPlayer<?> player) {
+        try (final MetaDataAccess<CmdInstance> metaDataAccess = player.accessTemporaryMetaData(
+            PlayerMetaDataKeys.TEMPORARY_CONFIRM)) {
+            return metaDataAccess.get().orElse(null);
+        }
     }
 
     public static void removePending(PlotPlayer<?> player) {
-        player.deleteMeta("cmdConfirm");
+        try (final MetaDataAccess<CmdInstance> metaDataAccess = player.accessTemporaryMetaData(
+            PlayerMetaDataKeys.TEMPORARY_CONFIRM)) {
+            metaDataAccess.remove();
+        }
     }
 
     public static void addPending(final PlotPlayer<?> player, String commandStr,
@@ -49,7 +59,10 @@ public class CmdConfirm {
         }
         TaskManager.runTaskLater(() -> {
             CmdInstance cmd = new CmdInstance(runnable);
-            player.setMeta("cmdConfirm", cmd);
+            try (final MetaDataAccess<CmdInstance> metaDataAccess = player.accessTemporaryMetaData(
+                PlayerMetaDataKeys.TEMPORARY_CONFIRM)) {
+                metaDataAccess.set(cmd);
+            }
         }, TaskTime.ticks(1L));
     }
 }

Core/src/main/java/com/plotsquared/core/command/Command.java

@@ -35,6 +35,7 @@ import com.plotsquared.core.util.StringComparison;
 import com.plotsquared.core.util.StringMan;
 import com.plotsquared.core.util.task.RunnableVal2;
 import com.plotsquared.core.util.task.RunnableVal3;
+import com.plotsquared.core.permissions.PermissionHolder;
 import lombok.SneakyThrows;
 import javax.annotation.Nonnull;
 
@@ -158,7 +159,7 @@ public abstract class Command {
         return this.allCommands;
     }
 
-    public boolean hasConfirmation(CommandCaller player) {
+    public boolean hasConfirmation(PermissionHolder player) {
         return this.confirmation && !player.hasPermission(getPermission() + ".confirm.bypass");
     }
 

Core/src/main/java/com/plotsquared/core/command/CommandCaller.java

@@ -34,14 +34,6 @@ public interface CommandCaller {
      */
     void sendMessage(String message);
 
-    /**
-     * Check the player's permissions. <i>Will be cached if permission caching is enabled.</i>
-     *
-     * @param permission the name of the permission
-     */
-    boolean hasPermission(String permission);
-
-    boolean isPermissionSet(String permission);
-
     RequiredType getSuperCaller();
+
 }

Core/src/main/java/com/plotsquared/core/command/DebugExec.java

@@ -409,46 +409,6 @@ public class DebugExec extends SubCommand {
                             }
                         }, "/plot debugexec list-scripts", "List of scripts");
                     return true;
-                case "allcmd":
-                    if (args.length < 3) {
-                        Captions.COMMAND_SYNTAX
-                            .send(player, "/plot debugexec allcmd <condition> <command>");
-                        return false;
-                    }
-                    long start = System.currentTimeMillis();
-                    Command cmd = MainCommand.getInstance().getCommand(args[3]);
-                    String[] params = Arrays.copyOfRange(args, 4, args.length);
-                    if ("true".equals(args[1])) {
-                        Location location = player.getMeta(PlotPlayer.META_LOCATION);
-                        Plot plot = player.getMeta(PlotPlayer.META_LAST_PLOT);
-                        for (Plot current : PlotSquared.get().getBasePlots()) {
-                            player.setMeta(PlotPlayer.META_LOCATION, current.getBottomAbs());
-                            player.setMeta(PlotPlayer.META_LAST_PLOT, current);
-                            cmd.execute(player, params, null, null);
-                        }
-                        if (location == null) {
-                            player.deleteMeta(PlotPlayer.META_LOCATION);
-                        } else {
-                            player.setMeta(PlotPlayer.META_LOCATION, location);
-                        }
-                        if (plot == null) {
-                            player.deleteMeta(PlotPlayer.META_LAST_PLOT);
-                        } else {
-                            player.setMeta(PlotPlayer.META_LAST_PLOT, plot);
-                        }
-                        player.sendMessage("&c> " + (System.currentTimeMillis() - start));
-                        return true;
-                    }
-                    init();
-                    this.scope.put("_2", params);
-                    this.scope.put("_3", cmd);
-                    script =
-                        "_1=PS.getBasePlots().iterator();while(_1.hasNext()){plot=_1.next();if("
-                            + args[1]
-                            + "){PlotPlayer.setMeta(\"location\",plot.getBottomAbs());PlotPlayer.setMeta(\"lastplot\",plot);_3.onCommand"
-                            + "(PlotPlayer,_2)}}";
-
-                    break;
                 case "all":
                     if (args.length < 3) {
                         Captions.COMMAND_SYNTAX

Core/src/main/java/com/plotsquared/core/command/Grant.java

@@ -30,6 +30,8 @@ import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.CaptionUtility;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.database.DBFunc;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.util.MainUtil;
 import com.plotsquared.core.util.Permissions;
@@ -42,7 +44,6 @@ import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.TimeoutException;
-import java.util.function.Consumer;
 
 @CommandDeclaration(command = "grant",
     category = CommandCategory.CLAIMING,
@@ -80,41 +81,40 @@ public class Grant extends Command {
                         MainUtil.sendMessage(player, Captions.INVALID_PLAYER);
                     } else {
                         final UUID uuid = uuids.toArray(new UUID[0])[0];
-                        final Consumer<byte[]> result = array -> {
-                            if (arg0.equals("check")) { // check
-                                int granted;
-                                if (array == null) {
-                                    granted = 0;
-                                } else {
-                                    granted = Ints.fromByteArray(array);
-                                }
-                                Captions.GRANTED_PLOTS.send(player, granted);
-                            } else { // add
-                                int amount;
-                                if (array == null) {
-                                    amount = 1;
-                                } else {
-                                    amount = 1 + Ints.fromByteArray(array);
-                                }
-                                boolean replace = array != null;
-                                String key = "grantedPlots";
-                                byte[] rawData = Ints.toByteArray(amount);
-
-                                PlotPlayer online = PlotSquared.platform().getPlayerManager().getPlayerIfExists(uuid);
-                                if (online != null) {
-                                    online.setPersistentMeta(key, rawData);
-                                } else {
-                                    DBFunc.addPersistentMeta(uuid, key, rawData, replace);
-                                }
-                            }
-                        };
                         PlotPlayer<?> pp = PlotSquared.platform().getPlayerManager().getPlayerIfExists(uuid);
                         if (pp != null) {
-                            result.accept(player.getPersistentMeta("grantedPlots"));
+                            try (final MetaDataAccess<Integer> access = pp.accessPersistentMetaData(
+                                PlayerMetaDataKeys.PERSISTENT_GRANTED_PLOTS)) {
+                                if (args[0].equalsIgnoreCase("check")) {
+                                    Captions.GRANTED_PLOTS.send(player, access.get().orElse(0));
+                                } else {
+                                    access.set(access.get().orElse(0) + 1);
+                                }
+                            }
                         } else {
                             DBFunc.getPersistentMeta(uuid, new RunnableVal<Map<String, byte[]>>() {
                                 @Override public void run(Map<String, byte[]> value) {
-                                    result.accept(value.get("grantedPlots"));
+                                    final byte[] array = value.get("grantedPlots");
+                                    if (arg0.equals("check")) { // check
+                                        int granted;
+                                        if (array == null) {
+                                            granted = 0;
+                                        } else {
+                                            granted = Ints.fromByteArray(array);
+                                        }
+                                        Captions.GRANTED_PLOTS.send(player, granted);
+                                    } else { // add
+                                        int amount;
+                                        if (array == null) {
+                                            amount = 1;
+                                        } else {
+                                            amount = 1 + Ints.fromByteArray(array);
+                                        }
+                                        boolean replace = array != null;
+                                        String key = "grantedPlots";
+                                        byte[] rawData = Ints.toByteArray(amount);
+                                        DBFunc.addPersistentMeta(uuid, key, rawData, replace);
+                                    }
                                 }
                             });
                         }

Core/src/main/java/com/plotsquared/core/command/Inbox.java

@@ -25,7 +25,9 @@
  */
 package com.plotsquared.core.command;
 
+import com.google.inject.TypeLiteral;
 import com.plotsquared.core.configuration.Captions;
+import com.plotsquared.core.player.MetaDataAccess;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.comment.CommentInbox;
@@ -34,6 +36,7 @@ import com.plotsquared.core.plot.comment.PlotComment;
 import com.plotsquared.core.util.MainUtil;
 import com.plotsquared.core.util.StringMan;
 import com.plotsquared.core.util.task.RunnableVal;
+import com.plotsquared.core.player.MetaDataKey;
 
 import java.util.List;
 
@@ -140,7 +143,10 @@ public class Inbox extends SubCommand {
                 StringMan.join(CommentManager.inboxes.keySet(), ", "));
             return false;
         }
-        player.setMeta("inbox:" + inbox.toString(), System.currentTimeMillis());
+        final MetaDataKey<Long> metaDataKey = MetaDataKey.of(String.format("inbox:%s", inbox.toString()), new TypeLiteral<Long>() {});
+        try (final MetaDataAccess<Long> metaDataAccess = player.accessTemporaryMetaData(metaDataKey)) {
+            metaDataAccess.set(System.currentTimeMillis());
+        }
         final int page;
         if (args.length > 1) {
             switch (args[1].toLowerCase()) {

Core/src/main/java/com/plotsquared/core/command/Load.java

@@ -28,6 +28,8 @@ package com.plotsquared.core.command;
 import com.google.inject.Inject;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.configuration.Settings;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -43,6 +45,7 @@ import javax.annotation.Nonnull;
 
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.util.Collections;
 import java.util.List;
 
 @CommandDeclaration(command = "load",
@@ -86,44 +89,46 @@ public class Load extends SubCommand {
             return false;
         }
 
-        if (args.length != 0) {
-            if (args.length == 1) {
-                List<String> schematics = player.getMeta("plot_schematics");
-                if (schematics == null) {
-                    // No schematics found:
-                    MainUtil.sendMessage(player, Captions.LOAD_NULL);
-                    return false;
-                }
-                String schematic;
-                try {
-                    schematic = schematics.get(Integer.parseInt(args[0]) - 1);
-                } catch (Exception ignored) {
-                    // use /plot load <index>
-                    MainUtil.sendMessage(player, Captions.NOT_VALID_NUMBER,
-                        "(1, " + schematics.size() + ')');
-                    return false;
-                }
-                final URL url;
-                try {
-                    url = new URL(Settings.Web.URL + "saves/" + player.getUUID() + '/' + schematic);
-                } catch (MalformedURLException e) {
-                    e.printStackTrace();
-                    MainUtil.sendMessage(player, Captions.LOAD_FAILED);
-                    return false;
-                }
-                plot.addRunning();
-                MainUtil.sendMessage(player, Captions.GENERATING_COMPONENT);
-                TaskManager.runTaskAsync(() -> {
-                    Schematic taskSchematic = this.schematicHandler.getSchematic(url);
-                    if (taskSchematic == null) {
-                        plot.removeRunning();
-                        sendMessage(player, Captions.SCHEMATIC_INVALID,
-                            "non-existent or not in gzip format");
-                        return;
+        try (final MetaDataAccess<List<String>> metaDataAccess =
+            player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_SCHEMATICS)) {
+            if (args.length != 0) {
+                if (args.length == 1) {
+                    List<String> schematics = metaDataAccess.get().orElse(null);
+                    if (schematics == null) {
+                        // No schematics found:
+                        MainUtil.sendMessage(player, Captions.LOAD_NULL);
+                        return false;
                     }
-                    PlotArea area = plot.getArea();
-                    this.schematicHandler.paste(taskSchematic, plot, 0, area.getMinBuildHeight(), 0, false,
-                            new RunnableVal<Boolean>() {
+                    String schematic;
+                    try {
+                        schematic = schematics.get(Integer.parseInt(args[0]) - 1);
+                    } catch (Exception ignored) {
+                        // use /plot load <index>
+                        MainUtil.sendMessage(player, Captions.NOT_VALID_NUMBER,
+                            "(1, " + schematics.size() + ')');
+                        return false;
+                    }
+                    final URL url;
+                    try {
+                        url = new URL(Settings.Web.URL + "saves/" + player.getUUID() + '/' + schematic);
+                    } catch (MalformedURLException e) {
+                        e.printStackTrace();
+                        MainUtil.sendMessage(player, Captions.LOAD_FAILED);
+                        return false;
+                    }
+                    plot.addRunning();
+                    MainUtil.sendMessage(player, Captions.GENERATING_COMPONENT);
+                    TaskManager.runTaskAsync(() -> {
+                        Schematic taskSchematic = this.schematicHandler.getSchematic(url);
+                        if (taskSchematic == null) {
+                            plot.removeRunning();
+                            sendMessage(player, Captions.SCHEMATIC_INVALID,
+                                "non-existent or not in gzip format");
+                            return;
+                        }
+                        PlotArea area = plot.getArea();
+                        this.schematicHandler
+                            .paste(taskSchematic, plot, 0, area.getMinBuildHeight(), 0, false, new RunnableVal<Boolean>() {
                                 @Override public void run(Boolean value) {
                                     plot.removeRunning();
                                     if (value) {
@@ -133,58 +138,61 @@ public class Load extends SubCommand {
                                     }
                                 }
                             });
-                });
-                return true;
-            }
-            plot.removeRunning();
-            MainUtil.sendMessage(player, Captions.COMMAND_SYNTAX, "/plot load <index>");
-            return false;
-        }
-
-        // list schematics
-
-        List<String> schematics = player.getMeta("plot_schematics");
-        if (schematics == null) {
-            plot.addRunning();
-            TaskManager.runTaskAsync(() -> {
-                List<String> schematics1 = this.schematicHandler.getSaves(player.getUUID());
-                plot.removeRunning();
-                if ((schematics1 == null) || schematics1.isEmpty()) {
-                    MainUtil.sendMessage(player, Captions.LOAD_FAILED);
-                    return;
+                    });
+                    return true;
                 }
-                player.setMeta("plot_schematics", schematics1);
+                plot.removeRunning();
+                MainUtil.sendMessage(player, Captions.COMMAND_SYNTAX, "/plot load <index>");
+                return false;
+            }
+
+            // list schematics
+
+            List<String> schematics = metaDataAccess.get().orElse(null);
+            if (schematics == null) {
+                plot.addRunning();
+                TaskManager.runTaskAsync(() -> {
+                    List<String> schematics1 = this.schematicHandler.getSaves(player.getUUID());
+                    plot.removeRunning();
+                    if ((schematics1 == null) || schematics1.isEmpty()) {
+                        MainUtil.sendMessage(player, Captions.LOAD_FAILED);
+                        return;
+                    }
+                    metaDataAccess.set(schematics1);
+                    displaySaves(player);
+                });
+            } else {
                 displaySaves(player);
-            });
-        } else {
-            displaySaves(player);
+            }
         }
         return true;
     }
 
     public void displaySaves(PlotPlayer<?> player) {
-        List<String> schematics = player.getMeta("plot_schematics");
-        for (int i = 0; i < Math.min(schematics.size(), 32); i++) {
-            try {
-                String schematic = schematics.get(i).split("\\.")[0];
-                String[] split = schematic.split("_");
-                if (split.length < 5) {
-                    continue;
+        try (final MetaDataAccess<List<String>> metaDataAccess =
+            player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_SCHEMATICS)) {
+            List<String> schematics = metaDataAccess.get().orElse(Collections.emptyList());
+            for (int i = 0; i < Math.min(schematics.size(), 32); i++) {
+                try {
+                    String schematic = schematics.get(i).split("\\.")[0];
+                    String[] split = schematic.split("_");
+                    if (split.length < 5) {
+                        continue;
+                    }
+                    String time = secToTime((System.currentTimeMillis() / 1000) - Long.parseLong(split[0]));
+                    String world = split[1];
+                    PlotId id = PlotId.fromString(split[2] + ';' + split[3]);
+                    String size = split[4];
+                    String color = "$4";
+                    MainUtil.sendMessage(player,
+                        "$3[$2" + (i + 1) + "$3] " + color + time + "$3 | " + color + world + ';' + id
+                            + "$3 | " + color + size + 'x' + size);
+                } catch (Exception e) {
+                    e.printStackTrace();
                 }
-                String time =
-                    secToTime((System.currentTimeMillis() / 1000) - Long.parseLong(split[0]));
-                String world = split[1];
-                PlotId id = PlotId.fromString(split[2] + ';' + split[3]);
-                String size = split[4];
-                String color = "$4";
-                MainUtil.sendMessage(player,
-                    "$3[$2" + (i + 1) + "$3] " + color + time + "$3 | " + color + world + ';' + id
-                        + "$3 | " + color + size + 'x' + size);
-            } catch (Exception e) {
-                e.printStackTrace();
             }
+            MainUtil.sendMessage(player, Captions.LOAD_LIST);
         }
-        MainUtil.sendMessage(player, Captions.LOAD_LIST);
     }
 
     public String secToTime(long time) {

Core/src/main/java/com/plotsquared/core/command/MainCommand.java

@@ -31,6 +31,8 @@ import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.configuration.Settings;
 import com.plotsquared.core.location.Location;
 import com.plotsquared.core.player.ConsolePlayer;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -230,8 +232,6 @@ public class MainCommand extends Command {
     public CompletableFuture<Boolean> execute(final PlotPlayer<?> player, String[] args,
         RunnableVal3<Command, Runnable, Runnable> confirm,
         RunnableVal2<Command, CommandResult> whenDone) {
-        // Clear perm caching //
-        player.deleteMeta("perm");
         // Optional command scope //
         Location location = null;
         Plot plot = null;
@@ -246,12 +246,17 @@ public class MainCommand extends Command {
                 Location newLoc = newPlot.getCenterSynchronous();
                 if (player.canTeleport(newLoc)) {
                     // Save meta
-                    location = player.getMeta(PlotPlayer.META_LOCATION);
-                    plot = player.getMeta(PlotPlayer.META_LAST_PLOT);
+                    try (final MetaDataAccess<Location> locationMetaDataAccess
+                        = player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LOCATION)) {
+                        location = locationMetaDataAccess.get().orElse(null);
+                        locationMetaDataAccess.set(newLoc);
+                    }
+                    try (final MetaDataAccess<Plot> plotMetaDataAccess
+                        = player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                        plot = plotMetaDataAccess.get().orElse(null);
+                        plotMetaDataAccess.set(newPlot);
+                    }
                     tp = true;
-                    // Set loc
-                    player.setMeta(PlotPlayer.META_LOCATION, newLoc);
-                    player.setMeta(PlotPlayer.META_LAST_PLOT, newPlot);
                 } else {
                     Captions.BORDER.send(player);
                 }
@@ -304,15 +309,21 @@ public class MainCommand extends Command {
         }
         // Reset command scope //
         if (tp && !(player instanceof ConsolePlayer)) {
-            if (location == null) {
-                player.deleteMeta(PlotPlayer.META_LOCATION);
-            } else {
-                player.setMeta(PlotPlayer.META_LOCATION, location);
+            try (final MetaDataAccess<Location> locationMetaDataAccess
+                = player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LOCATION)) {
+                if (location == null) {
+                    locationMetaDataAccess.remove();
+                } else {
+                    locationMetaDataAccess.set(location);
+                }
             }
-            if (plot == null) {
-                player.deleteMeta(PlotPlayer.META_LAST_PLOT);
-            } else {
-                player.setMeta(PlotPlayer.META_LAST_PLOT, plot);
+            try (final MetaDataAccess<Plot> plotMetaDataAccess
+                = player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                if (plot == null) {
+                    plotMetaDataAccess.remove();
+                } else {
+                    plotMetaDataAccess.set(plot);
+                }
             }
         }
         return CompletableFuture.completedFuture(true);

Core/src/main/java/com/plotsquared/core/command/Save.java

@@ -28,6 +28,8 @@ package com.plotsquared.core.command;
 import com.google.inject.Inject;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.location.Location;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotId;
@@ -104,9 +106,9 @@ public class Save extends SubCommand {
                                 return;
                             }
                             MainUtil.sendMessage(player, Captions.SAVE_SUCCESS);
-                            List<String> schematics = player.getMeta("plot_schematics");
-                            if (schematics != null) {
-                                schematics.add(file + ".schem");
+                            try (final MetaDataAccess<List<String>> schematicAccess =
+                                player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_SCHEMATICS)) {
+                                schematicAccess.get().ifPresent(schematics -> schematics.add(file + ".schem"));
                             }
                         }
                     });

Core/src/main/java/com/plotsquared/core/command/Setup.java

@@ -29,6 +29,8 @@ import com.google.inject.Inject;
 import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.generator.GeneratorWrapper;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.setup.SetupProcess;
 import com.plotsquared.core.setup.SetupStep;
@@ -72,42 +74,48 @@ public class Setup extends SubCommand {
     }
 
     @Override public boolean onCommand(PlotPlayer<?> player, String[] args) {
-        SetupProcess process = player.getMeta("setup");
-        if (process == null) {
-            if (args.length > 0) {
-                MainUtil.sendMessage(player, Captions.SETUP_NOT_STARTED);
+        try (final MetaDataAccess<SetupProcess> metaDataAccess =
+            player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_SETUP)) {
+            SetupProcess process = metaDataAccess.get().orElse(null);
+            if (process == null) {
+                if (args.length > 0) {
+                    MainUtil.sendMessage(player, Captions.SETUP_NOT_STARTED);
+                    return true;
+                }
+                process = new SetupProcess();
+                metaDataAccess.set(process);
+                this.setupUtils.updateGenerators();
+                SetupStep step = process.getCurrentStep();
+                step.announce(player);
+                displayGenerators(player);
                 return true;
             }
-            process = new SetupProcess();
-            player.setMeta("setup", process);
-            this.setupUtils.updateGenerators();
-            SetupStep step = process.getCurrentStep();
-            step.announce(player);
-            displayGenerators(player);
+            if (args.length == 1) {
+                if ("back".equalsIgnoreCase(args[0])) {
+                    process.back();
+                    process.getCurrentStep().announce(player);
+                } else if ("cancel".equalsIgnoreCase(args[0])) {
+                    metaDataAccess.remove();
+                    MainUtil.sendMessage(player, Captions.SETUP_CANCELLED);
+                } else {
+                    process.handleInput(player, args[0]);
+                    if (process.getCurrentStep() != null) {
+                        process.getCurrentStep().announce(player);
+                    }
+                }
+            } else {
+                process.getCurrentStep().announce(player);
+            }
             return true;
         }
-        if (args.length == 1) {
-            if ("back".equalsIgnoreCase(args[0])) {
-                process.back();
-                process.getCurrentStep().announce(player);
-            } else if ("cancel".equalsIgnoreCase(args[0])) {
-                player.deleteMeta("setup");
-                MainUtil.sendMessage(player, Captions.SETUP_CANCELLED);
-            } else {
-                process.handleInput(player, args[0]);
-                if (process.getCurrentStep() != null) {
-                    process.getCurrentStep().announce(player);
-                }
-            }
-        } else {
-            process.getCurrentStep().announce(player);
-        }
-        return true;
-
     }
 
     @Override public Collection<Command> tab(PlotPlayer player, String[] args, boolean space) {
-        SetupProcess process = (SetupProcess) player.getMeta("setup"); // TODO use generics -> auto cast
+        SetupProcess process;
+        try (final MetaDataAccess<SetupProcess> metaDataAccess =
+            player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_SETUP)) {
+            process = metaDataAccess.get().orElse(null);
+        }
         if (process == null) {
             return Collections.emptyList();
         }

Core/src/main/java/com/plotsquared/core/listener/PlotListener.java

@@ -26,12 +26,14 @@
 package com.plotsquared.core.listener;
 
 import com.plotsquared.core.PlotSquared;
-import com.plotsquared.core.collection.ByteArrayUtilities;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.configuration.Settings;
 import com.plotsquared.core.events.PlotFlagRemoveEvent;
 import com.plotsquared.core.events.Result;
 import com.plotsquared.core.location.Location;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.MetaDataKey;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -71,6 +73,7 @@ import javax.annotation.Nullable;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
+import java.util.Optional;
 import java.util.UUID;
 
 public class PlotListener {
@@ -94,7 +97,7 @@ public class PlotListener {
                     ++value.count;
                     if (value.count == value.interval) {
                         value.count = 0;
-                        PlotPlayer<?> player = PlotPlayer.wrap(entry.getKey());
+                        final PlotPlayer<?> player = PlotSquared.platform().getPlayerManager().getPlayerIfExists(entry.getKey());
                         if (player == null) {
                             iterator.remove();
                             continue;
@@ -114,7 +117,7 @@ public class PlotListener {
                     ++value.count;
                     if (value.count == value.interval) {
                         value.count = 0;
-                        PlotPlayer<?> player = PlotSquared.platform().getWorldUtil().getPlayer(entry.getKey());
+                        final PlotPlayer<?> player = PlotSquared.platform().getPlayerManager().getPlayerIfExists(entry.getKey());
                         if (player == null) {
                             iterator.remove();
                             continue;
@@ -134,14 +137,16 @@ public class PlotListener {
             .hasPermission(player, "plots.admin.entry.denied")) {
             return false;
         }
-        Plot last = player.getMeta(PlotPlayer.META_LAST_PLOT);
-        if ((last != null) && !last.getId().equals(plot.getId())) {
-            plotExit(player, last);
+        try (final MetaDataAccess<Plot> lastPlot = player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+            Plot last = lastPlot.get().orElse(null);
+            if ((last != null) && !last.getId().equals(plot.getId())) {
+                plotExit(player, last);
+            }
+            if (ExpireManager.IMP != null) {
+                ExpireManager.IMP.handleEntry(player, plot);
+            }
+            lastPlot.set(plot);
         }
-        if (ExpireManager.IMP != null) {
-            ExpireManager.IMP.handleEntry(player, plot);
-        }
-        player.setMeta(PlotPlayer.META_LAST_PLOT, plot);
         this.eventDispatcher.callEntry(player, plot);
         if (plot.hasOwner()) {
             // This will inherit values from PlotArea
@@ -177,8 +182,9 @@ public class PlotListener {
                 boolean flight = player.getFlight();
                 GameMode gamemode = player.getGameMode();
                 if (flight != (gamemode == GameModes.CREATIVE || gamemode == GameModes.SPECTATOR)) {
-                    player.setPersistentMeta("flight",
-                        ByteArrayUtilities.booleanToBytes(player.getFlight()));
+                    try (final MetaDataAccess<Boolean> metaDataAccess = player.accessPersistentMetaData(PlayerMetaDataKeys.PERSISTENT_FLIGHT)) {
+                        metaDataAccess.set(player.getFlight());
+                    }
                 }
                 player.setFlight(flyStatus == FlyFlag.FlyStatus.ENABLED);
             }
@@ -227,39 +233,47 @@ public class PlotListener {
             player.setWeather(plot.getFlag(WeatherFlag.class));
 
             ItemType musicFlag = plot.getFlag(MusicFlag.class);
-            if (musicFlag != null) {
-                final String rawId = musicFlag.getId();
-                if (rawId.contains("disc") || musicFlag == ItemTypes.AIR) {
-                    Location location = player.getLocation();
-                    Location lastLocation = player.getMeta("music");
-                    if (lastLocation != null) {
-                        player.playMusic(lastLocation, musicFlag);
-                        if (musicFlag == ItemTypes.AIR) {
-                            player.deleteMeta("music");
+
+            try (final MetaDataAccess<Location> musicMeta =
+                player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_MUSIC)) {
+                if (musicFlag != null) {
+                    final String rawId = musicFlag.getId();
+                    if (rawId.contains("disc") || musicFlag == ItemTypes.AIR) {
+                        Location location = player.getLocation();
+                        Location lastLocation = musicMeta.get().orElse(null);
+                        if (lastLocation != null) {
+                            player.playMusic(lastLocation, musicFlag);
+                            if (musicFlag == ItemTypes.AIR) {
+                                musicMeta.remove();
+                            }
+                        }
+                        if (musicFlag != ItemTypes.AIR) {
+                            try {
+                                musicMeta.set(location);
+                                player.playMusic(location, musicFlag);
+                            } catch (Exception ignored) {
+                            }
                         }
                     }
-                    if (musicFlag != ItemTypes.AIR) {
-                        try {
-                            player.setMeta("music", location);
-                            player.playMusic(location, musicFlag);
-                        } catch (Exception ignored) {
-                        }
-                    }
-                }
-            } else {
-                Location lastLoc = player.getMeta("music");
-                if (lastLoc != null) {
-                    player.deleteMeta("music");
-                    player.playMusic(lastLoc, ItemTypes.AIR);
+                } else {
+                    musicMeta.get().ifPresent(lastLoc -> {
+                        musicMeta.remove();
+                        player.playMusic(lastLoc, ItemTypes.AIR);
+                    });
                 }
             }
+
             CommentManager.sendTitle(player, plot);
 
             if (titles && !player.getAttribute("disabletitles")) {
                 if (!Captions.TITLE_ENTERED_PLOT.getTranslated().isEmpty()
                     || !Captions.TITLE_ENTERED_PLOT_SUB.getTranslated().isEmpty()) {
                     TaskManager.runTaskLaterAsync(() -> {
-                        Plot lastPlot = player.getMeta(PlotPlayer.META_LAST_PLOT);
+                        Plot lastPlot = null;
+                        try (final MetaDataAccess<Plot> lastPlotAccess =
+                            player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                            lastPlot = lastPlotAccess.get().orElse(null);
+                        }
                         if ((lastPlot != null) && plot.getId().equals(lastPlot.getId())) {
                             Map<String, String> replacements = new HashMap<>();
                             replacements.put("%x%", String.valueOf(lastPlot.getId().getX()));
@@ -296,87 +310,96 @@ public class PlotListener {
     }
 
     public boolean plotExit(final PlotPlayer<?> player, Plot plot) {
-        Object previous = player.deleteMeta(PlotPlayer.META_LAST_PLOT);
-        this.eventDispatcher.callLeave(player, plot);
-        if (plot.hasOwner()) {
-            PlotArea pw = plot.getArea();
-            if (pw == null) {
-                return true;
-            }
-            if (plot.getFlag(DenyExitFlag.class) && !Permissions
-                .hasPermission(player, Captions.PERMISSION_ADMIN_EXIT_DENIED) && !player
-                .getMeta("kick", false)) {
-                if (previous != null) {
-                    player.setMeta(PlotPlayer.META_LAST_PLOT, previous);
+        try (final MetaDataAccess<Plot> lastPlot = player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+            final Plot previous = lastPlot.remove();
+            this.eventDispatcher.callLeave(player, plot);
+            if (plot.hasOwner()) {
+                PlotArea pw = plot.getArea();
+                if (pw == null) {
+                    return true;
                 }
-                return false;
-            }
-            if (!plot.getFlag(GamemodeFlag.class).equals(GamemodeFlag.DEFAULT) || !plot
-                .getFlag(GuestGamemodeFlag.class).equals(GamemodeFlag.DEFAULT)) {
-                if (player.getGameMode() != pw.getGameMode()) {
-                    if (!Permissions.hasPermission(player, "plots.gamemode.bypass")) {
-                        player.setGameMode(pw.getGameMode());
-                    } else {
-                        MainUtil.sendMessage(player, StringMan
-                            .replaceAll(Captions.GAMEMODE_WAS_BYPASSED.getTranslated(), "{plot}",
-                                plot.toString(), "{gamemode}",
-                                pw.getGameMode().getName().toLowerCase()));
+                try (final MetaDataAccess<Boolean> kickAccess =
+                    player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_KICK)) {
+                    if (plot.getFlag(DenyExitFlag.class) && !Permissions
+                        .hasPermission(player, Captions.PERMISSION_ADMIN_EXIT_DENIED) &&
+                        !kickAccess.get().orElse(false)) {
+                        if (previous != null) {
+                            lastPlot.set(previous);
+                        }
+                        return false;
                     }
                 }
-            }
-
-            final String farewell = plot.getFlag(FarewellFlag.class);
-            if (!farewell.isEmpty()) {
-                plot.format(Captions.PREFIX_FAREWELL.getTranslated() + farewell, player, false)
-                    .thenAcceptAsync(player::sendMessage);
-            }
-
-            if (plot.getFlag(NotifyLeaveFlag.class)) {
-                if (!Permissions.hasPermission(player, "plots.flag.notify-enter.bypass")) {
-                    for (UUID uuid : plot.getOwners()) {
-                        final PlotPlayer owner = PlotSquared.platform().getPlayerManager().getPlayerIfExists(uuid);
-                        if ((owner != null) && !owner.getUUID().equals(player.getUUID())) {
-                            MainUtil.sendMessage(owner, Captions.NOTIFY_LEAVE.getTranslated()
-                                .replace("%player", player.getName())
-                                .replace("%plot", plot.getId().toString()));
+                if (!plot.getFlag(GamemodeFlag.class).equals(GamemodeFlag.DEFAULT) || !plot
+                    .getFlag(GuestGamemodeFlag.class).equals(GamemodeFlag.DEFAULT)) {
+                    if (player.getGameMode() != pw.getGameMode()) {
+                        if (!Permissions.hasPermission(player, "plots.gamemode.bypass")) {
+                            player.setGameMode(pw.getGameMode());
+                        } else {
+                            MainUtil.sendMessage(player, StringMan
+                                .replaceAll(Captions.GAMEMODE_WAS_BYPASSED.getTranslated(), "{plot}",
+                                    plot.toString(), "{gamemode}",
+                                    pw.getGameMode().getName().toLowerCase()));
                         }
                     }
                 }
-            }
 
-            final FlyFlag.FlyStatus flyStatus = plot.getFlag(FlyFlag.class);
-            if (flyStatus != FlyFlag.FlyStatus.DEFAULT) {
-                if (player.hasPersistentMeta("flight")) {
-                    player.setFlight(
-                        ByteArrayUtilities.bytesToBoolean(player.getPersistentMeta("flight")));
-                    player.removePersistentMeta("flight");
-                } else {
-                    GameMode gameMode = player.getGameMode();
-                    if (gameMode == GameModes.SURVIVAL || gameMode == GameModes.ADVENTURE) {
-                        player.setFlight(false);
-                    } else if (!player.getFlight()) {
-                        player.setFlight(true);
+                final String farewell = plot.getFlag(FarewellFlag.class);
+                if (!farewell.isEmpty()) {
+                    plot.format(Captions.PREFIX_FAREWELL.getTranslated() + farewell, player, false)
+                        .thenAcceptAsync(player::sendMessage);
+                }
+
+                if (plot.getFlag(NotifyLeaveFlag.class)) {
+                    if (!Permissions.hasPermission(player, "plots.flag.notify-enter.bypass")) {
+                        for (UUID uuid : plot.getOwners()) {
+                            final PlotPlayer owner = PlotSquared.platform().getPlayerManager().getPlayerIfExists(uuid);
+                            if ((owner != null) && !owner.getUUID().equals(player.getUUID())) {
+                                MainUtil.sendMessage(owner, Captions.NOTIFY_LEAVE.getTranslated()
+                                    .replace("%player", player.getName())
+                                    .replace("%plot", plot.getId().toString()));
+                            }
+                        }
                     }
                 }
-            }
 
-            if (plot.getFlag(TimeFlag.class) != TimeFlag.TIME_DISABLED.getValue().longValue()) {
-                player.setTime(Long.MAX_VALUE);
-            }
+                final FlyFlag.FlyStatus flyStatus = plot.getFlag(FlyFlag.class);
+                if (flyStatus != FlyFlag.FlyStatus.DEFAULT) {
+                    try (final MetaDataAccess<Boolean> metaDataAccess = player.accessPersistentMetaData(PlayerMetaDataKeys.PERSISTENT_FLIGHT)) {
+                        final Optional<Boolean> value = metaDataAccess.get();
+                        if (value.isPresent()) {
+                            player.setFlight(value.get());
+                            metaDataAccess.remove();
+                        } else {
+                            GameMode gameMode = player.getGameMode();
+                            if (gameMode == GameModes.SURVIVAL || gameMode == GameModes.ADVENTURE) {
+                                player.setFlight(false);
+                            } else if (!player.getFlight()) {
+                                player.setFlight(true);
+                            }
+                        }
+                    }
+                }
 
-            final PlotWeather plotWeather = plot.getFlag(WeatherFlag.class);
-            if (plotWeather != PlotWeather.CLEAR) {
-                player.setWeather(PlotWeather.RESET);
-            }
+                if (plot.getFlag(TimeFlag.class) != TimeFlag.TIME_DISABLED.getValue().longValue()) {
+                    player.setTime(Long.MAX_VALUE);
+                }
 
-            Location lastLoc = player.getMeta("music");
-            if (lastLoc != null) {
-                player.deleteMeta("music");
-                player.playMusic(lastLoc, ItemTypes.AIR);
-            }
+                final PlotWeather plotWeather = plot.getFlag(WeatherFlag.class);
+                if (plotWeather != PlotWeather.CLEAR) {
+                    player.setWeather(PlotWeather.RESET);
+                }
 
-            feedRunnable.remove(player.getUUID());
-            healRunnable.remove(player.getUUID());
+                try (final MetaDataAccess<Location> musicAccess =
+                    player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_MUSIC)) {
+                    musicAccess.get().ifPresent(lastLoc -> {
+                        musicAccess.remove();
+                        player.playMusic(lastLoc, ItemTypes.AIR);
+                    });
+                }
+
+                feedRunnable.remove(player.getUUID());
+                healRunnable.remove(player.getUUID());
+            }
         }
         return true;
     }

Core/src/main/java/com/plotsquared/core/listener/WESubscriber.java

@@ -26,6 +26,7 @@
 package com.plotsquared.core.listener;
 
 import com.google.inject.Inject;
+import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.configuration.Settings;
 import com.plotsquared.core.player.PlotPlayer;
@@ -72,7 +73,7 @@ public class WESubscriber {
         Actor actor = event.getActor();
         if (actor != null && actor.isPlayer()) {
             String name = actor.getName();
-            PlotPlayer plotPlayer = PlotPlayer.wrap(name);
+            final PlotPlayer<?> plotPlayer = PlotSquared.platform().getPlayerManager().getPlayerIfExists(name);
             Set<CuboidRegion> mask;
             if (plotPlayer == null) {
                 Player player = (Player) actor;

Core/src/main/java/com/plotsquared/core/permissions/ConsolePermissionProfile.java

@@ -0,0 +1,39 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.permissions;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+public enum ConsolePermissionProfile implements PermissionProfile {
+    INSTANCE;
+
+    @Override public boolean hasPermission(@Nullable final String world,
+                                           @Nonnull final String permission) {
+        return true;
+    }
+
+}

Core/src/main/java/com/plotsquared/core/permissions/NullPermissionProfile.java

@@ -23,15 +23,17 @@
  *     You should have received a copy of the GNU General Public License
  *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-package com.plotsquared.core.util;
+package com.plotsquared.core.permissions;
 
-public abstract class PermHandler {
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
-    public abstract boolean init();
+public enum NullPermissionProfile implements PermissionProfile {
+    INSTANCE;
 
-    public abstract boolean hasPermission(String world, String player, String perm);
-
-    public boolean hasPermission(String player, String perm) {
-        return hasPermission(null, player, perm);
+    @Override public boolean hasPermission(@Nullable final String world,
+                                           @Nonnull final String permission) {
+        return false;
     }
+
 }

Core/src/main/java/com/plotsquared/core/permissions/PermissionHandler.java

@@ -0,0 +1,99 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.permissions;
+
+import com.plotsquared.core.player.OfflinePlotPlayer;
+import com.plotsquared.core.player.PlotPlayer;
+
+import javax.annotation.Nonnull;
+import java.util.Optional;
+import java.util.Set;
+
+/**
+ * Permission handler
+ */
+public interface PermissionHandler {
+
+    /**
+     * Initialize the permission handler
+     */
+    void initialize();
+
+    /**
+     * Attempt to construct a permission profile for a plot player
+     *
+     * @param playerPlotPlayer Plot player
+     * @return Permission profile, if one was able to be constructed
+     */
+    @Nonnull Optional<PermissionProfile> getPermissionProfile(
+        @Nonnull PlotPlayer<?> playerPlotPlayer);
+
+    /**
+     * Attempt to construct a permission profile for an offline plot player
+     *
+     * @param offlinePlotPlayer Offline player
+     * @return Permission profile, if one was able to be constructed
+     */
+    @Nonnull Optional<PermissionProfile> getPermissionProfile(
+        @Nonnull OfflinePlotPlayer offlinePlotPlayer);
+
+    /**
+     * Get all capabilities that the permission handler has
+     *
+     * @return Immutable set of capabilities
+     */
+    @Nonnull Set<PermissionHandlerCapability> getCapabilities();
+
+    /**
+     * Check whether or not the permission handler has a given capability
+     *
+     * @param capability Capability
+     * @return {@code true} if the handler has the capability, else {@code false}
+     */
+    default boolean hasCapability(@Nonnull final PermissionHandlerCapability capability) {
+        return this.getCapabilities().contains(capability);
+    }
+
+
+    /**
+     * Permission handler capabilities
+     */
+    enum PermissionHandlerCapability {
+        /**
+         * The ability to check for online (player) permissions
+         */
+        ONLINE_PERMISSIONS,
+        /**
+         * The ability to check for offline (player) permissions
+         */
+        OFFLINE_PERMISSIONS,
+        /**
+         * Per world permissions
+         */
+        PER_WORLD_PERMISSIONS
+    }
+
+}

Core/src/main/java/com/plotsquared/core/permissions/PermissionHolder.java

@@ -0,0 +1,94 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.permissions;
+
+import com.plotsquared.core.configuration.Captions;
+import com.plotsquared.core.configuration.Settings;
+
+import javax.annotation.Nonnegative;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * Any object which can hold permissions
+ */
+public interface PermissionHolder {
+
+    /**
+     * Check if the owner of the profile has a given (global) permission
+     *
+     * @param permission Permission
+     * @return {@code true} if the owner has the given permission, else {@code false}
+     */
+    default boolean hasPermission(@Nonnull final String permission) {
+        return hasPermission(null ,permission);
+    }
+
+    /**
+     * Check the the highest permission a PlotPlayer has within a specified range.<br>
+     * - Excessively high values will lag<br>
+     * - The default range that is checked is {@link Settings.Limit#MAX_PLOTS}<br>
+     *
+     * @param stub   The permission stub to check e.g. for `plots.plot.#` the stub is `plots.plot`
+     * @param range  The range to check
+     * @return The highest permission they have within that range
+     */
+    @Nonnegative default int hasPermissionRange(@Nonnull final String stub,
+                                                @Nonnegative final int range) {
+        if (hasPermission(Captions.PERMISSION_ADMIN.getTranslated())) {
+            return Integer.MAX_VALUE;
+        }
+        String[] nodes = stub.split("\\.");
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < (nodes.length - 1); i++) {
+            builder.append(nodes[i]).append(".");
+            if (!stub.equals(builder + Captions.PERMISSION_STAR.getTranslated())) {
+                if (hasPermission(builder + Captions.PERMISSION_STAR.getTranslated())) {
+                    return Integer.MAX_VALUE;
+                }
+            }
+        }
+        if (hasPermission(stub + ".*")) {
+            return Integer.MAX_VALUE;
+        }
+        for (int i = range; i > 0; i--) {
+            if (hasPermission(stub + "." + i)) {
+                return i;
+            }
+        }
+        return 0;
+    }
+
+    /**
+     * Check if the owner of the profile has a given permission
+     *
+     * @param world      World name
+     * @param permission Permission
+     * @return {@code true} if the owner has the given permission, else {@code false}
+     */
+    boolean hasPermission(@Nullable String world, @Nonnull String permission);
+
+}

Core/src/main/java/com/plotsquared/core/permissions/PermissionProfile.java

@@ -0,0 +1,55 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.permissions;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * A permission profile that can be used to check for permissions
+ */
+public interface PermissionProfile {
+
+    /**
+     * Check if the owner of the profile has a given (global) permission
+     *
+     * @param permission Permission
+     * @return {@code true} if the owner has the given permission, else {@code false}
+     */
+    default boolean hasPermission(@Nonnull final String permission) {
+        return hasPermission(null ,permission);
+    }
+
+    /**
+     * Check if the owner of the profile has a given permission
+     *
+     * @param world      World name
+     * @param permission Permission
+     * @return {@code true} if the owner has the given permission, else {@code false}
+     */
+    boolean hasPermission(@Nullable final String world, @Nonnull String permission);
+
+}

Core/src/main/java/com/plotsquared/core/player/ConsolePlayer.java

@@ -32,6 +32,8 @@ import com.plotsquared.core.database.DBFunc;
 import com.plotsquared.core.events.TeleportCause;
 import com.plotsquared.core.inject.annotations.ConsoleActor;
 import com.plotsquared.core.location.Location;
+import com.plotsquared.core.permissions.PermissionHandler;
+import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
 import com.plotsquared.core.plot.PlotWeather;
 import com.plotsquared.core.plot.world.PlotAreaManager;
@@ -47,6 +49,8 @@ import javax.annotation.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.util.UUID;
 
 public class ConsolePlayer extends PlotPlayer<Actor> {
@@ -59,8 +63,9 @@ public class ConsolePlayer extends PlotPlayer<Actor> {
     @Inject private ConsolePlayer(@Nonnull final PlotAreaManager plotAreaManager,
                                   @Nonnull final EventDispatcher eventDispatcher,
                                   @ConsoleActor @Nonnull final Actor actor,
-                                  @Nullable final EconHandler econHandler) {
-        super(plotAreaManager, eventDispatcher, econHandler);
+                                  @Nullable final EconHandler econHandler,
+                                  @Nonnull final PermissionHandler permissionHandler) {
+        super(plotAreaManager, eventDispatcher, econHandler, permissionHandler);
         this.actor = actor;
         final PlotArea[] areas = plotAreaManager.getAllPlotAreas();
         final PlotArea area;
@@ -118,15 +123,7 @@ public class ConsolePlayer extends PlotPlayer<Actor> {
     }
 
     @Override public long getLastPlayed() {
-        return 0;
-    }
-
-    @Override public boolean hasPermission(String permission) {
-        return true;
-    }
-
-    @Override public boolean isPermissionSet(String permission) {
-        return true;
+        return System.currentTimeMillis();
     }
 
     @Override public void sendMessage(String message) {
@@ -134,12 +131,16 @@ public class ConsolePlayer extends PlotPlayer<Actor> {
     }
 
     @Override public void teleport(Location location, TeleportCause cause) {
-        setMeta(META_LAST_PLOT, location.getPlot());
-        setMeta(META_LOCATION, location);
-    }
-
-    @Override public boolean isOnline() {
-        return true;
+        try (final MetaDataAccess<Plot> lastPlot = accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+            if (location.getPlot() == null) {
+                lastPlot.remove();
+            } else {
+                lastPlot.set(location.getPlot());
+            }
+        }
+        try (final MetaDataAccess<Location> locationMetaDataAccess = accessPersistentMetaData(PlayerMetaDataKeys.TEMPORARY_LOCATION)) {
+            locationMetaDataAccess.set(location);
+        }
     }
 
     @Override public String getName() {

Core/src/main/java/com/plotsquared/core/player/MetaDataAccess.java

@@ -0,0 +1,129 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.player;
+
+import com.plotsquared.core.synchronization.LockRepository;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.Optional;
+
+/**
+ * Access to player meta data
+ *
+ * @param <T> Meta data type
+ */
+public abstract class MetaDataAccess<T> implements AutoCloseable {
+
+    private final PlotPlayer<?> player;
+    private final MetaDataKey<T> metaDataKey;
+    private final LockRepository.LockAccess lockAccess;
+    private boolean closed = false;
+
+    MetaDataAccess(@Nonnull final PlotPlayer<?> player, @Nonnull final MetaDataKey<T> metaDataKey,
+        @Nonnull final LockRepository.LockAccess lockAccess) {
+        this.player = player;
+        this.metaDataKey = metaDataKey;
+        this.lockAccess = lockAccess;
+    }
+
+    /**
+     * Check if the player has meta data stored with the given key
+     *
+     * @return {@code true} if player has meta data with this key, or
+     * {@code false}
+     */
+    public abstract boolean isPresent();
+
+    /**
+     * Remove the stored value meta data
+     *
+     * @return Old value, or {@code null}
+     */
+    @Nullable public abstract T remove();
+
+    /**
+     * Set the meta data value
+     *
+     * @param value New value
+     */
+    public abstract void set(@Nonnull final T value);
+
+    /**
+     * Get the stored meta data value
+     *
+     * @return Stored value, or {@link Optional#empty()}
+     */
+    @Nonnull public abstract Optional<T> get();
+
+    @Override public final void close() {
+        this.lockAccess.close();
+        this.closed = true;
+    }
+
+    /**
+     * Get the owner of the meta data
+     *
+     * @return Player
+     */
+    @Nonnull public PlotPlayer<?> getPlayer() {
+        return this.player;
+    }
+
+    /**
+     * Get the meta data key
+     *
+     * @return Meta data key
+     */
+    @Nonnull public MetaDataKey<T> getMetaDataKey() {
+        return this.metaDataKey;
+    }
+
+    /**
+     * Check whether or not the meta data access has been closed.
+     * After being closed, all attempts to access the meta data
+     * through the instance, will lead to {@link IllegalAccessException}
+     * being thrown
+     *
+     * @return {@code true} if the access has been closed
+     */
+    public boolean isClosed() {
+        return this.closed;
+    }
+
+    protected void checkClosed() {
+        if (this.closed) {
+            sneakyThrow(new IllegalAccessException("The meta data access instance has been closed"));
+        }
+    }
+
+    @SuppressWarnings("ALL")
+    private static <E extends Throwable> void sneakyThrow(final Throwable e) throws E {
+        throw (E) e;
+    }
+
+
+}

Core/src/main/java/com/plotsquared/core/player/MetaDataKey.java

@@ -0,0 +1,108 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.player;
+
+import com.google.common.base.Objects;
+import com.google.common.base.Preconditions;
+import com.google.inject.TypeLiteral;
+import com.plotsquared.core.synchronization.LockKey;
+
+import javax.annotation.Nonnull;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Key used to access meta data
+ *
+ * @param <T> Meta data type
+ */
+public final class MetaDataKey<T> {
+
+    private static final Map<String, MetaDataKey> keyMap = new HashMap<>();
+    private static final Object keyMetaData = new Object();
+
+    private final String key;
+    private final TypeLiteral<T> type;
+    private final LockKey lockKey;
+
+    private MetaDataKey(@Nonnull final String key, @Nonnull final TypeLiteral<T> type) {
+        this.key = Preconditions.checkNotNull(key, "Key may not be null");
+        this.type = Preconditions.checkNotNull(type, "Type may not be null");
+        this.lockKey = LockKey.of(this.key);
+    }
+
+    /**
+     * Get a new named lock key
+     *
+     * @param key Key name
+     * @param <T> Type
+     * @return MetaData key instance
+     */
+    @Nonnull public static <T> MetaDataKey<T> of(@Nonnull final String key, @Nonnull final TypeLiteral<T> type) {
+        synchronized (keyMetaData) {
+            return (MetaDataKey<T>)
+                keyMap.computeIfAbsent(key, missingKey -> new MetaDataKey<>(missingKey, type));
+        }
+    }
+
+    @Override public String toString() {
+        return this.key;
+    }
+
+    @Override public boolean equals(final Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        final MetaDataKey lockKey = (MetaDataKey) o;
+        return Objects.equal(this.key, lockKey.key);
+    }
+
+    @Override public int hashCode() {
+        return Objects.hashCode(this.key);
+    }
+
+    /**
+     * Get the {@link LockKey} associated with this key
+     *
+     * @return Lock key
+     */
+    @Nonnull public LockKey getLockKey() {
+        return this.lockKey;
+    }
+
+    /**
+     * Get the meta data type
+     *
+     * @return Meta data type
+     */
+    @Nonnull public TypeLiteral<T> getType() {
+        return this.type;
+    }
+
+}

Core/src/main/java/com/plotsquared/core/player/OfflinePlotPlayer.java

@@ -25,9 +25,12 @@
  */
 package com.plotsquared.core.player;
 
+import com.plotsquared.core.permissions.PermissionHolder;
+
+import javax.annotation.Nonnegative;
 import java.util.UUID;
 
-public interface OfflinePlotPlayer {
+public interface OfflinePlotPlayer extends PermissionHolder {
 
     /**
      * Gets the {@code UUID} of this player
@@ -40,16 +43,8 @@ public interface OfflinePlotPlayer {
      * Gets the time in milliseconds when the player was last seen online.
      *
      * @return the time in milliseconds when last online
-     * @deprecated This method may be inconsistent across platforms. The javadoc may be wrong depending on which platform is used.
      */
-    @SuppressWarnings("DeprecatedIsStillUsed") @Deprecated long getLastPlayed();
-
-    /**
-     * Checks if this player is online.
-     *
-     * @return {@code true} if this player is online
-     */
-    boolean isOnline();
+    @Nonnegative long getLastPlayed();
 
     /**
      * Gets the name of this player.
@@ -57,4 +52,5 @@ public interface OfflinePlotPlayer {
      * @return the player name
      */
     String getName();
+
 }

Core/src/main/java/com/plotsquared/core/player/PersistentMetaDataAccess.java

@@ -0,0 +1,66 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.player;
+
+import com.plotsquared.core.synchronization.LockRepository;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.Optional;
+
+final class PersistentMetaDataAccess<T> extends MetaDataAccess<T> {
+
+    PersistentMetaDataAccess(@Nonnull final PlotPlayer<?> player,
+                             @Nonnull final MetaDataKey<T> metaDataKey,
+                             @Nonnull final LockRepository.LockAccess lockAccess) {
+        super(player, metaDataKey, lockAccess);
+    }
+
+    @Override public boolean isPresent() {
+        this.checkClosed();
+        return this.getPlayer().hasPersistentMeta(getMetaDataKey().toString());
+    }
+
+    @Override @Nullable public T remove() {
+        this.checkClosed();
+        final Object old = this.getPlayer().removePersistentMeta(this.getMetaDataKey().toString());
+        if (old == null) {
+            return null;
+        }
+        return (T) old;
+    }
+
+    @Override public void set(@Nonnull T value) {
+        this.checkClosed();
+        this.getPlayer().setPersistentMeta(this.getMetaDataKey(), value);
+    }
+
+    @Nonnull @Override public Optional<T> get() {
+        this.checkClosed();
+        return Optional.ofNullable(this.getPlayer().getPersistentMeta(this.getMetaDataKey()));
+    }
+
+}

Core/src/main/java/com/plotsquared/core/player/PlayerMetaDataKeys.java

@@ -0,0 +1,60 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.player;
+
+import com.google.inject.TypeLiteral;
+import com.plotsquared.core.command.Auto;
+import com.plotsquared.core.command.CmdInstance;
+import com.plotsquared.core.location.Location;
+import com.plotsquared.core.plot.Plot;
+import com.plotsquared.core.plot.PlotInventory;
+import com.plotsquared.core.setup.SetupProcess;
+
+import java.util.List;
+
+public final class PlayerMetaDataKeys {
+
+    //@formatter:off
+    public static final MetaDataKey<Boolean> PERSISTENT_FLIGHT = MetaDataKey.of("flight", new TypeLiteral<Boolean>() {});
+    public static final MetaDataKey<Integer> PERSISTENT_GRANTED_PLOTS = MetaDataKey.of("grantedPlots", new TypeLiteral<Integer>() {});
+
+    public static final MetaDataKey<Plot> TEMPORARY_LAST_PLOT = MetaDataKey.of("lastplot", new TypeLiteral<Plot>() {});
+    public static final MetaDataKey<Location> TEMPORARY_MUSIC = MetaDataKey.of("music", new TypeLiteral<Location>() {});
+    public static final MetaDataKey<Boolean> TEMPORARY_KICK = MetaDataKey.of("kick", new TypeLiteral<Boolean>() {});
+    public static final MetaDataKey<SetupProcess> TEMPORARY_SETUP = MetaDataKey.of("setup", new TypeLiteral<SetupProcess>() {});
+    public static final MetaDataKey<PlotInventory> TEMPORARY_INVENTORY = MetaDataKey.of("inventory", new TypeLiteral<PlotInventory>() {});
+    public static final MetaDataKey<Boolean> TEMPORARY_IGNORE_EXPIRE_TASK = MetaDataKey.of("ignoreExpireTask", new TypeLiteral<Boolean>() {});
+    public static final MetaDataKey<Plot> TEMPORARY_WORLD_EDIT_REGION_PLOT = MetaDataKey.of("WorldEditRegionPlot", new TypeLiteral<Plot>() {});
+    public static final MetaDataKey<Boolean> TEMPORARY_AUTO = MetaDataKey.of(Auto.class.getName(), new TypeLiteral<Boolean>() {});
+    public static final MetaDataKey<List<String>> TEMPORARY_SCHEMATICS = MetaDataKey.of("plot_schematics", new TypeLiteral<List<String>>() {});
+    public static final MetaDataKey<Location> TEMPORARY_LOCATION = MetaDataKey.of("location", new TypeLiteral<Location>() {});
+    public static final MetaDataKey<CmdInstance> TEMPORARY_CONFIRM = MetaDataKey.of("cmdConfirm", new TypeLiteral<CmdInstance>() {});
+    //@formatter:on
+
+    private PlayerMetaDataKeys() {
+    }
+
+}

Core/src/main/java/com/plotsquared/core/player/PlotPlayer.java

@@ -26,7 +26,9 @@
 package com.plotsquared.core.player;
 
 import com.google.common.base.Preconditions;
+import com.google.common.primitives.Ints;
 import com.plotsquared.core.PlotSquared;
+import com.plotsquared.core.collection.ByteArrayUtilities;
 import com.plotsquared.core.command.CommandCaller;
 import com.plotsquared.core.command.RequiredType;
 import com.plotsquared.core.configuration.CaptionUtility;
@@ -35,6 +37,9 @@ import com.plotsquared.core.configuration.Settings;
 import com.plotsquared.core.database.DBFunc;
 import com.plotsquared.core.events.TeleportCause;
 import com.plotsquared.core.location.Location;
+import com.plotsquared.core.permissions.NullPermissionProfile;
+import com.plotsquared.core.permissions.PermissionHandler;
+import com.plotsquared.core.permissions.PermissionProfile;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
 import com.plotsquared.core.plot.PlotCluster;
@@ -45,6 +50,7 @@ import com.plotsquared.core.plot.flag.implementations.DoneFlag;
 import com.plotsquared.core.plot.world.PlotAreaManager;
 import com.plotsquared.core.plot.world.SinglePlotArea;
 import com.plotsquared.core.plot.world.SinglePlotAreaManager;
+import com.plotsquared.core.synchronization.LockRepository;
 import com.plotsquared.core.util.EconHandler;
 import com.plotsquared.core.util.EventDispatcher;
 import com.plotsquared.core.util.Permissions;
@@ -54,11 +60,11 @@ import com.plotsquared.core.util.task.TaskManager;
 import com.sk89q.worldedit.extension.platform.Actor;
 import com.sk89q.worldedit.world.gamemode.GameMode;
 import com.sk89q.worldedit.world.item.ItemType;
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.nio.ByteBuffer;
 import java.util.Collection;
 import java.util.Collections;
@@ -78,9 +84,6 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
 
     private static final Logger logger = LoggerFactory.getLogger("P2/" + PlotPlayer.class.getSimpleName());
 
-    public static final String META_LAST_PLOT = "lastplot";
-    public static final String META_LOCATION = "location";
-
     // Used to track debug mode
     private static final Set<PlotPlayer<?>> debugModeEnabled = Collections.synchronizedSet(new HashSet<>());
 
@@ -92,14 +95,20 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
     private ConcurrentHashMap<String, Object> meta;
     private int hash;
 
+    private final LockRepository lockRepository = new LockRepository();
+
     private final PlotAreaManager plotAreaManager;
     private final EventDispatcher eventDispatcher;
     private final EconHandler econHandler;
+    private final PermissionProfile permissionProfile;
 
-    public PlotPlayer(@Nonnull final PlotAreaManager plotAreaManager, @Nonnull final EventDispatcher eventDispatcher, @Nullable final EconHandler econHandler) {
+    public PlotPlayer(@Nonnull final PlotAreaManager plotAreaManager, @Nonnull final EventDispatcher eventDispatcher, @Nullable final EconHandler econHandler,
+        @Nonnull final PermissionHandler permissionHandler) {
         this.plotAreaManager = plotAreaManager;
         this.eventDispatcher = eventDispatcher;
         this.econHandler = econHandler;
+        this.permissionProfile = permissionHandler.getPermissionProfile(this).orElse(
+            NullPermissionProfile.INSTANCE);
     }
 
     public static <T> PlotPlayer<T> from(@Nonnull final T object) {
@@ -133,18 +142,9 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
         return players;
     }
 
-    /**
-     * Efficiently wrap a Player, or OfflinePlayer object to get a PlotPlayer (or fetch if it's already cached)<br>
-     * - Accepts sponge/bukkit Player (online)
-     * - Accepts player name (online)
-     * - Accepts UUID
-     * - Accepts bukkit OfflinePlayer (offline)
-     *
-     * @param player Player object to wrap
-     * @return Wrapped player
-     */
-    public static PlotPlayer<?> wrap(Object player) {
-        return PlotSquared.platform().wrapPlayer(player);
+    @Override public final boolean hasPermission(@Nullable final String world,
+                                                 @Nonnull final String permission) {
+        return this.permissionProfile.hasPermission(world, permission);
     }
 
     public abstract Actor toActor();
@@ -157,7 +157,7 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
      * @param key
      * @param value
      */
-    public void setMeta(String key, Object value) {
+    void setMeta(String key, Object value) {
         if (value == null) {
             deleteMeta(key);
         } else {
@@ -175,14 +175,14 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
      * @param <T> the object type to return
      * @return the value assigned to the key or null if it does not exist
      */
-    public <T> T getMeta(String key) {
+    <T> T getMeta(String key) {
         if (this.meta != null) {
             return (T) this.meta.get(key);
         }
         return null;
     }
 
-    public <T> T getMeta(String key, T defaultValue) {
+    <T> T getMeta(String key, T defaultValue) {
         T meta = getMeta(key);
         if (meta == null) {
             return defaultValue;
@@ -201,7 +201,7 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
      *
      * @param key
      */
-    public Object deleteMeta(String key) {
+    Object deleteMeta(String key) {
         return this.meta == null ? null : this.meta.remove(key);
     }
 
@@ -220,11 +220,13 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
      * @return the plot the player is standing on or null if standing on a road or not in a {@link PlotArea}
      */
     public Plot getCurrentPlot() {
-        Plot value = getMeta(PlotPlayer.META_LAST_PLOT);
-        if (value == null && !Settings.Enabled_Components.EVENTS) {
-            return getLocation().getPlot();
+        try (final MetaDataAccess<Plot> lastPlotAccess =
+            this.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+            if (lastPlotAccess.get().orElse(null) == null && !Settings.Enabled_Components.EVENTS) {
+                return this.getLocation().getPlot();
+            }
+            return lastPlotAccess.get().orElse(null);
         }
-        return value;
     }
 
     /**
@@ -246,31 +248,6 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
         return Permissions.hasPermissionRange(this, "plots.cluster", Settings.Limit.MAX_PLOTS);
     }
 
-    public int hasPermissionRange(String stub, int range) {
-        if (hasPermission(Captions.PERMISSION_ADMIN.getTranslated())) {
-            return Integer.MAX_VALUE;
-        }
-        String[] nodes = stub.split("\\.");
-        StringBuilder builder = new StringBuilder();
-        for (int i = 0; i < (nodes.length - 1); i++) {
-            builder.append(nodes[i]).append(".");
-            if (!stub.equals(builder + Captions.PERMISSION_STAR.getTranslated())) {
-                if (hasPermission(builder + Captions.PERMISSION_STAR.getTranslated())) {
-                    return Integer.MAX_VALUE;
-                }
-            }
-        }
-        if (hasPermission(stub + ".*")) {
-            return Integer.MAX_VALUE;
-        }
-        for (int i = range; i > 0; i--) {
-            if (hasPermission(stub + "." + i)) {
-                return i;
-            }
-        }
-        return 0;
-    }
-
     /**
      * Get the number of plots this player owns.
      *
@@ -721,18 +698,85 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
         }
     }
 
-    public byte[] getPersistentMeta(String key) {
+    byte[] getPersistentMeta(String key) {
         return this.metaMap.get(key);
     }
 
-    public void removePersistentMeta(String key) {
-        this.metaMap.remove(key);
+    Object removePersistentMeta(String key) {
+        final Object old = this.metaMap.remove(key);
         if (Settings.Enabled_Components.PERSISTENT_META) {
             DBFunc.removePersistentMeta(getUUID(), key);
         }
+        return old;
     }
 
-    public void setPersistentMeta(String key, byte[] value) {
+    /**
+     * Access keyed persistent meta data for this player. This returns a meta data
+     * access instance, that MUST be closed. It is meant to be used with try-with-resources,
+     * like such:
+     * <pre>{@code
+     * try (final MetaDataAccess<Integer> access = player.accessPersistentMetaData(PlayerMetaKeys.GRANTS)) {
+     *     int grants = access.get();
+     *     access.set(grants + 1);
+     * }
+     * }</pre>
+     *
+     * @param key Meta data key
+     * @param <T> Meta data type
+     * @return Meta data access. MUST be closed after being used
+     */
+    @Nonnull public <T> MetaDataAccess<T> accessPersistentMetaData(@Nonnull final MetaDataKey<T> key) {
+        return new PersistentMetaDataAccess<>(this, key, this.lockRepository.lock(key.getLockKey()));
+    }
+
+    /**
+     * Access keyed temporary meta data for this player. This returns a meta data
+     * access instance, that MUST be closed. It is meant to be used with try-with-resources,
+     * like such:
+     * <pre>{@code
+     * try (final MetaDataAccess<Integer> access = player.accessTemporaryMetaData(PlayerMetaKeys.GRANTS)) {
+     *     int grants = access.get();
+     *     access.set(grants + 1);
+     * }
+     * }</pre>
+     *
+     * @param key Meta data key
+     * @param <T> Meta data type
+     * @return Meta data access. MUST be closed after being used
+     */
+    @Nonnull public <T> MetaDataAccess<T> accessTemporaryMetaData(@Nonnull final MetaDataKey<T> key) {
+        return new TemporaryMetaDataAccess<>(this, key, this.lockRepository.lock(key.getLockKey()));
+    }
+
+    <T> void setPersistentMeta(@Nonnull final MetaDataKey<T> key,
+                               @Nonnull final T value) {
+        final Object rawValue = value;
+        if (key.getType().getRawType().equals(Integer.class)) {
+            this.setPersistentMeta(key.toString(), Ints.toByteArray((int) rawValue));
+        } else if (key.getType().getRawType().equals(Boolean.class)) {
+            this.setPersistentMeta(key.toString(), ByteArrayUtilities.booleanToBytes((boolean) rawValue));
+        } else {
+            throw new IllegalArgumentException(String.format("Unknown meta data type '%s'", key.getType().toString()));
+        }
+    }
+
+    @Nullable <T> T getPersistentMeta(@Nonnull final MetaDataKey<T> key) {
+        final byte[] value = this.getPersistentMeta(key.toString());
+        if (value == null) {
+            return null;
+        }
+        final Object returnValue;
+        if (key.getType().getRawType().equals(Integer.class)) {
+            returnValue = Ints.fromByteArray(value);
+        } else if (key.getType().getRawType().equals(Boolean.class)) {
+            returnValue = ByteArrayUtilities.bytesToBoolean(value);
+        } else {
+            throw new IllegalArgumentException(String.format("Unknown meta data type '%s'", key.getType().toString()));
+        }
+        return (T) returnValue;
+    }
+
+    void setPersistentMeta(String key, byte[] value) {
         boolean delete = hasPersistentMeta(key);
         this.metaMap.put(key, value);
         if (Settings.Enabled_Components.PERSISTENT_META) {
@@ -740,7 +784,7 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
         }
     }
 
-    public boolean hasPersistentMeta(String key) {
+    boolean hasPersistentMeta(String key) {
         return this.metaMap.containsKey(key);
     }
 
@@ -784,6 +828,15 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer
         }
     }
 
+    /**
+     * Get this player's {@link LockRepository}
+     *
+     * @return Lock repository instance
+     */
+    @Nonnull public LockRepository getLockRepository() {
+        return this.lockRepository;
+    }
+
     @FunctionalInterface
     public interface PlotPlayerConverter<BaseObject> {
         PlotPlayer<?> convert(BaseObject object);

Core/src/main/java/com/plotsquared/core/player/TemporaryMetaDataAccess.java

@@ -0,0 +1,66 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.player;
+
+import com.plotsquared.core.synchronization.LockRepository;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.Optional;
+
+final class TemporaryMetaDataAccess<T> extends MetaDataAccess<T> {
+
+    TemporaryMetaDataAccess(@Nonnull final PlotPlayer<?> player,
+                            @Nonnull final MetaDataKey<T> metaDataKey,
+                            @Nonnull final LockRepository.LockAccess lockAccess) {
+        super(player, metaDataKey, lockAccess);
+    }
+
+    @Override public boolean isPresent() {
+        this.checkClosed();
+        return this.getPlayer().getMeta(this.getMetaDataKey().toString()) != null;
+    }
+
+    @Override @Nullable public T remove() {
+        this.checkClosed();
+        final Object old = getPlayer().deleteMeta(this.getMetaDataKey().toString());
+        if (old == null) {
+            return null;
+        }
+        return (T) old;
+    }
+
+    @Override public void set(@Nonnull T value) {
+        this.checkClosed();
+        this.getPlayer().setMeta(this.getMetaDataKey().toString(), null);
+    }
+
+    @Nonnull @Override public Optional<T> get() {
+        this.checkClosed();
+        return Optional.ofNullable(this.getPlayer().getMeta(this.getMetaDataKey().toString()));
+    }
+
+}

Core/src/main/java/com/plotsquared/core/plot/Plot.java

@@ -1935,11 +1935,16 @@ public class Plot {
             DBFunc.createPlotAndSettings(this, () -> {
                 PlotArea plotworld = Plot.this.area;
                 if (notify && plotworld.isAutoMerge()) {
-                    PlotPlayer player = this.worldUtil.getPlayer(uuid);
+                    final PlotPlayer<?> player = PlotSquared.platform().getPlayerManager()
+                        .getPlayerIfExists(uuid);
+
                     PlotMergeEvent event = this.eventDispatcher
                         .callMerge(this, Direction.ALL, Integer.MAX_VALUE, player);
+
                     if (event.getEventResult() == Result.DENY) {
-                        sendMessage(player, Captions.EVENT_DENIED, "Auto merge on claim");
+                        if (player != null) {
+                            sendMessage(player, Captions.EVENT_DENIED, "Auto merge on claim");
+                        }
                         return;
                     }
                     Plot.this.autoMerge(event.getDir(), event.getMax(), uuid, true);
@@ -3095,10 +3100,10 @@ public class Plot {
                 if (!TaskManager.removeFromTeleportQueue(name)) {
                     return;
                 }
-                if (player.isOnline()) {
+                try {
                     MainUtil.sendMessage(player, Captions.TELEPORTED_TO_PLOT);
                     player.teleport(location, cause);
-                }
+                } catch (final Exception ignored) {}
             }, TaskTime.seconds(Settings.Teleport.DELAY));
             resultConsumer.accept(true);
         };

Core/src/main/java/com/plotsquared/core/plot/PlotArea.java

@@ -43,6 +43,8 @@ import com.plotsquared.core.inject.annotations.WorldConfig;
 import com.plotsquared.core.location.Direction;
 import com.plotsquared.core.location.Location;
 import com.plotsquared.core.location.PlotLoc;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.flag.FlagContainer;
 import com.plotsquared.core.plot.flag.FlagParseException;
@@ -788,8 +790,11 @@ public abstract class PlotArea {
     }
 
     public boolean addPlot(@Nonnull final Plot plot) {
-        for (PlotPlayer pp : plot.getPlayersInPlot()) {
-            pp.setMeta(PlotPlayer.META_LAST_PLOT, plot);
+        for (final PlotPlayer<?> pp : plot.getPlayersInPlot()) {
+            try (final MetaDataAccess<Plot> metaDataAccess = pp.accessTemporaryMetaData(
+                PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                metaDataAccess.set(plot);
+            }
         }
         return this.plots.put(plot.getId(), plot) == null;
     }
@@ -827,8 +832,11 @@ public abstract class PlotArea {
 
     public boolean addPlotIfAbsent(@Nonnull final Plot plot) {
         if (this.plots.putIfAbsent(plot.getId(), plot) == null) {
-            for (PlotPlayer pp : plot.getPlayersInPlot()) {
-                pp.setMeta(PlotPlayer.META_LAST_PLOT, plot);
+            for (PlotPlayer<?> pp : plot.getPlayersInPlot()) {
+                try (final MetaDataAccess<Plot> metaDataAccess = pp.accessTemporaryMetaData(
+                    PlayerMetaDataKeys.TEMPORARY_LAST_PLOT)) {
+                    metaDataAccess.set(plot);
+                }
             }
             return true;
         }

Core/src/main/java/com/plotsquared/core/plot/PlotInventory.java

@@ -25,18 +25,19 @@
  */
 package com.plotsquared.core.plot;
 
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.util.InventoryUtil;
-
-import javax.annotation.Nonnull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.annotation.Nonnull;
+
 public class PlotInventory {
 
     private static final Logger logger = LoggerFactory.getLogger("P2/" + PlotInventory.class.getSimpleName());
 
-    private static final String META_KEY = "inventory";
     public final PlotPlayer<?> player;
     public final int size;
     private final PlotItemStack[] items;
@@ -58,16 +59,25 @@ public class PlotInventory {
     }
 
     public static PlotInventory getOpenPlotInventory(@Nonnull final PlotPlayer<?> plotPlayer) {
-        return plotPlayer.getMeta(META_KEY, null);
+        try (final MetaDataAccess<PlotInventory> inventoryAccess = plotPlayer.accessTemporaryMetaData(
+            PlayerMetaDataKeys.TEMPORARY_INVENTORY)) {
+            return inventoryAccess.get().orElse(null);
+        }
     }
 
     public static void setPlotInventoryOpen(@Nonnull final PlotPlayer<?> plotPlayer,
         @Nonnull final PlotInventory plotInventory) {
-        plotPlayer.setMeta(META_KEY, plotInventory);
+        try (final MetaDataAccess<PlotInventory> inventoryAccess = plotPlayer.accessTemporaryMetaData(
+            PlayerMetaDataKeys.TEMPORARY_INVENTORY)) {
+            inventoryAccess.set(plotInventory);
+        }
     }
 
     public static void removePlotInventoryOpen(@Nonnull final PlotPlayer<?>plotPlayer) {
-        plotPlayer.deleteMeta(META_KEY);
+        try (final MetaDataAccess<PlotInventory> inventoryAccess = plotPlayer.accessTemporaryMetaData(
+            PlayerMetaDataKeys.TEMPORARY_INVENTORY)) {
+            inventoryAccess.remove();
+        }
     }
 
     public boolean onClick(int index) {

Core/src/main/java/com/plotsquared/core/plot/comment/CommentManager.java

@@ -26,8 +26,11 @@
 package com.plotsquared.core.plot.comment;
 
 import com.google.common.annotations.Beta;
+import com.google.inject.TypeLiteral;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.configuration.Settings;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.MetaDataKey;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.util.task.RunnableVal;
@@ -77,7 +80,10 @@ import java.util.concurrent.atomic.AtomicInteger;
     }
 
     public static long getTimestamp(PlotPlayer<?> player, String inbox) {
-        return player.getMeta("inbox:" + inbox, player.getLastPlayed());
+        final MetaDataKey<Long> inboxKey = MetaDataKey.of(String.format("inbox:%s", inbox), new TypeLiteral<Long>() {});
+        try (final MetaDataAccess<Long> inboxAccess = player.accessTemporaryMetaData(inboxKey)) {
+            return inboxAccess.get().orElse(player.getLastPlayed());
+        }
     }
 
     public static void addInbox(CommentInbox inbox) {

Core/src/main/java/com/plotsquared/core/plot/expiration/ExpireManager.java

@@ -31,7 +31,9 @@ import com.plotsquared.core.database.DBFunc;
 import com.plotsquared.core.events.PlotFlagAddEvent;
 import com.plotsquared.core.events.PlotUnlinkEvent;
 import com.plotsquared.core.events.Result;
+import com.plotsquared.core.player.MetaDataAccess;
 import com.plotsquared.core.player.OfflinePlotPlayer;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -137,44 +139,42 @@ public class ExpireManager {
         }
     }
 
-    public void confirmExpiry(final PlotPlayer pp) {
-        if (pp.getMeta("ignoreExpireTask") != null) {
-            return;
-        }
-        if (plotsToDelete != null && !plotsToDelete.isEmpty() && pp
-            .hasPermission("plots.admin.command.autoclear")) {
-            final int num = plotsToDelete.size();
-            while (!plotsToDelete.isEmpty()) {
-                Iterator<Plot> iter = plotsToDelete.iterator();
-                final Plot current = iter.next();
-                if (!isExpired(new ArrayDeque<>(tasks), current).isEmpty()) {
-                    TaskManager.runTask(() -> {
-                        pp.setMeta("ignoreExpireTask", true);
-                        current.getCenter(pp::teleport);
-                        pp.deleteMeta("ignoreExpireTask");
-                        PlotMessage msg = new PlotMessage()
-                            .text(num + " " + (num > 1 ? "plots are" : "plot is") + " expired: ")
-                            .color("$1").text(current.toString()).color("$2")
-                            .command("/plot list expired").tooltip("/plot list expired")
-                            //.text("\n - ").color("$3").text("Delete all (/plot delete expired)").color("$2").command("/plot delete expired")
-                            .text("\n - ").color("$3").text("Delete this (/plot delete)")
-                            .color("$2").command("/plot delete").tooltip("/plot delete")
-                            .text("\n - ").color("$3").text("Remind later (/plot flag set keep 1d)")
-                            .color("$2").command("/plot flag set keep 1d").tooltip("/plot flag set keep 1d")
-                            .text("\n - ").color("$3").text("Keep this (/plot flag set keep true)")
-                            .color("$2").command("/plot flag set keep true")
-                            .tooltip("/plot flag set keep true").text("\n - ").color("$3")
-                            .text("Don't show me this").color("$2")
-                            .command("/plot toggle clear-confirmation")
-                            .tooltip("/plot toggle clear-confirmation");
-                        msg.send(pp);
-                    });
-                    return;
-                } else {
-                    iter.remove();
-                }
+    public void confirmExpiry(final PlotPlayer<?> pp) {
+        try (final MetaDataAccess<Boolean> metaDataAccess = pp.accessTemporaryMetaData(
+            PlayerMetaDataKeys.TEMPORARY_IGNORE_EXPIRE_TASK)) {
+            if (metaDataAccess.isPresent()) {
+                return;
+            }
+            if (plotsToDelete != null && !plotsToDelete.isEmpty() && pp.hasPermission("plots.admin.command.autoclear")) {
+                final int num = plotsToDelete.size();
+                while (!plotsToDelete.isEmpty()) {
+                    Iterator<Plot> iter = plotsToDelete.iterator();
+                    final Plot current = iter.next();
+                    if (!isExpired(new ArrayDeque<>(tasks), current).isEmpty()) {
+                        TaskManager.runTask(() -> {
+                            metaDataAccess.set(true);
+                            current.getCenter(pp::teleport);
+                            metaDataAccess.remove();
+                            PlotMessage msg = new PlotMessage().text(
+                                num + " " + (num > 1 ? "plots are" : "plot is") + " expired: ").color("$1").text(current.toString()).color("$2")
+                                .command("/plot list expired").tooltip("/plot list expired")
+                                //.text("\n - ").color("$3").text("Delete all (/plot delete expired)").color("$2").command("/plot delete expired")
+                                .text("\n - ").color("$3").text("Delete this (/plot delete)").color("$2").command("/plot delete").tooltip("/plot delete")
+                                .text("\n - ").color("$3").text("Remind later (/plot flag set keep 1d)").color("$2")
+                                .command("/plot flag set keep 1d").tooltip("/plot flag set keep 1d")
+                                .text("\n - ").color("$3").text("Keep this (/plot flag set keep true)").color("$2")
+                                .command("/plot flag set keep true").tooltip("/plot flag set keep true").text("\n - ").color("$3")
+                                .text("Don't show me this").color("$2").command("/plot toggle clear-confirmation")
+                                .tooltip("/plot toggle clear-confirmation");
+                            msg.send(pp);
+                        });
+                        return;
+                    } else {
+                        iter.remove();
+                    }
+                }
+                plotsToDelete.clear();
             }
-            plotsToDelete.clear();
         }
     }
 
@@ -418,13 +418,13 @@ public class ExpireManager {
             }
         }
         for (UUID helper : plot.getTrusted()) {
-            PlotPlayer player = PlotSquared.platform().getPlayerManager().getPlayerIfExists(helper);
+            PlotPlayer<?> player = PlotSquared.platform().getPlayerManager().getPlayerIfExists(helper);
             if (player != null) {
                 MainUtil.sendMessage(player, Captions.PLOT_REMOVED_USER, plot.toString());
             }
         }
         for (UUID helper : plot.getMembers()) {
-            PlotPlayer player = PlotSquared.platform().getPlayerManager().getPlayerIfExists(helper);
+            PlotPlayer<?> player = PlotSquared.platform().getPlayerManager().getPlayerIfExists(helper);
             if (player != null) {
                 MainUtil.sendMessage(player, Captions.PLOT_REMOVED_USER, plot.toString());
             }

Core/src/main/java/com/plotsquared/core/setup/CommonSetupSteps.java

@@ -30,6 +30,8 @@ import com.plotsquared.core.configuration.Caption;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.events.TeleportCause;
 import com.plotsquared.core.generator.GeneratorWrapper;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.PlotArea;
 import com.plotsquared.core.plot.PlotAreaTerrainType;
@@ -221,7 +223,10 @@ public enum CommonSetupSteps implements SetupStep {
                 MainUtil.sendMessage(plotPlayer, Captions.SETUP_WORLD_APPLY_PLOTSQUARED);
             }
             builder.worldName(argument);
-            plotPlayer.deleteMeta("setup");
+            try (final MetaDataAccess<SetupProcess> setupAccess = plotPlayer.accessTemporaryMetaData(
+                PlayerMetaDataKeys.TEMPORARY_SETUP)) {
+                setupAccess.remove();
+            }
             String world;
             if (builder.setupManager() == null) {
                 world = PlotSquared.platform().getInjector().getInstance(SetupUtils.class).setupWorld(builder);

Core/src/main/java/com/plotsquared/core/synchronization/LockKey.java

@@ -0,0 +1,92 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.synchronization;
+
+import com.google.common.base.Objects;
+import com.google.common.base.Preconditions;
+
+import javax.annotation.Nonnull;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Key used to access {@link java.util.concurrent.locks.Lock locks}
+ * from a {@link LockRepository}
+ */
+public final class LockKey {
+
+    private static final Map<String, LockKey> keyMap = new HashMap<>();
+    private static final Object keyLock = new Object();
+
+    private final String key;
+
+    private LockKey(@Nonnull final String key) {
+        this.key = Preconditions.checkNotNull(key, "Key may not be null");
+    }
+
+    /**
+     * Get a new named lock key
+     *
+     * @param key Key name
+     * @return Lock key instance
+     */
+    @Nonnull public static LockKey of(@Nonnull final String key) {
+        synchronized (keyLock) {
+            return keyMap.computeIfAbsent(key, LockKey::new);
+        }
+    }
+
+    /**
+     * Get all currently recognized lock keys
+     *
+     * @return Currently recognized lock keys
+     */
+    @Nonnull static Collection<LockKey> recognizedKeys() {
+        return Collections.unmodifiableCollection(keyMap.values());
+    }
+
+    @Override public String toString() {
+        return "LockKey{" + "key='" + key + '\'' + '}';
+    }
+
+    @Override public boolean equals(final Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        final LockKey lockKey = (LockKey) o;
+        return Objects.equal(this.key, lockKey.key);
+    }
+
+    @Override public int hashCode() {
+        return Objects.hashCode(this.key);
+    }
+
+}

Core/src/main/java/com/plotsquared/core/synchronization/LockRepository.java

@@ -0,0 +1,116 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.synchronization;
+
+import com.google.common.util.concurrent.Striped;
+
+import javax.annotation.Nonnull;
+import java.util.concurrent.locks.Lock;
+import java.util.function.Consumer;
+
+/**
+ * A repository for keyed {@link java.util.concurrent.locks.Lock locks}
+ */
+public final class LockRepository {
+
+    private final Striped<Lock> striped;
+
+    public LockRepository() {
+        this.striped = Striped.lock(LockKey.recognizedKeys().size());
+    }
+
+    /**
+     * Get the lock corresponding to the given lock key
+     *
+     * @param key Lock key
+     * @return Lock
+     */
+    @Nonnull public Lock getLock(@Nonnull final LockKey key) {
+        return this.striped.get(key);
+    }
+
+    /**
+     * Consume a lock
+     *
+     * @param key      Lock key
+     * @param consumer Lock consumer
+     */
+    public void useLock(@Nonnull final LockKey key, @Nonnull final Consumer<Lock> consumer) {
+        consumer.accept(this.getLock(key));
+    }
+
+    /**
+     * Wait for the lock to become available, and run
+     * the given runnable, then unlock the lock. This is
+     * a blocking method.
+     *
+     * @param key      Lock key
+     * @param runnable Action to run when the lock is available
+     */
+    public void useLock(@Nonnull final LockKey key, @Nonnull final Runnable runnable) {
+        this.useLock(key, lock -> {
+            lock.lock();
+            runnable.run();
+            lock.unlock();
+        });
+    }
+
+    /**
+     * Wait for a lock to be available, lock it and return
+     * an {@link AutoCloseable} instance that locks the key.
+     * <p>
+     * This is meant to be used with try-with-resources, like such:
+     * <pre>{@code
+     * try (final LockAccess lockAccess = lockRepository.lock(LockKey.of("your.key"))) {
+     *      // use lock
+     * }
+     * }</pre>
+     *
+     * @param key Lock key
+     * @return Lock access. Must be closed.
+     */
+    @Nonnull public LockAccess lock(@Nonnull final LockKey key) {
+        final Lock lock = this.getLock(key);
+        lock.lock();
+        return new LockAccess(lock);
+    }
+
+
+    public static class LockAccess implements AutoCloseable {
+
+        private final Lock lock;
+
+        private LockAccess(@Nonnull final Lock lock) {
+            this.lock = lock;
+        }
+
+        @Override public void close() {
+            this.lock.unlock();
+        }
+
+    }
+
+}

Core/src/main/java/com/plotsquared/core/util/EconHandler.java

@@ -48,16 +48,4 @@ public abstract class EconHandler {
 
     public abstract void depositMoney(OfflinePlotPlayer player, double amount);
 
-    /**
-     * @deprecated Use {@link PermHandler#hasPermission(String, String, String)} instead
-     */
-    @Deprecated public abstract boolean hasPermission(String world, String player, String perm);
-
-    /**
-     * @deprecated Use {@link PermHandler#hasPermission(String, String)} instead
-     */
-    @Deprecated public boolean hasPermission(String player, String perm) {
-        return hasPermission(null, player, perm);
-    }
-
 }

Core/src/main/java/com/plotsquared/core/util/Permissions.java

@@ -25,12 +25,13 @@
  */
 package com.plotsquared.core.util;
 
-import com.plotsquared.core.command.CommandCaller;
+import com.plotsquared.core.configuration.Caption;
 import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.configuration.Settings;
+import com.plotsquared.core.permissions.PermissionHolder;
 import com.plotsquared.core.player.PlotPlayer;
 
-import java.util.HashMap;
+import javax.annotation.Nonnull;
 
 /**
  * The Permissions class handles checking user permissions.<br>
@@ -39,78 +40,28 @@ import java.util.HashMap;
  */
 public class Permissions {
 
-    public static boolean hasPermission(PlotPlayer player, Captions caption, boolean notify) {
+    public static boolean hasPermission(PlotPlayer<?> player, Captions caption, boolean notify) {
         return hasPermission(player, caption.getTranslated(), notify);
     }
 
     /**
-     * Check if a player has a permission (Captions class helps keep track of permissions).
+     * Check if the owner of the profile has a given (global) permission
      *
-     * @param player
-     * @param caption
-     * @return
+     * @param permission Permission
+     * @return {@code true} if the owner has the given permission, else {@code false}
      */
-    public static boolean hasPermission(PlotPlayer player, Captions caption) {
-        return hasPermission(player, caption.getTranslated());
+    public static boolean hasPermission(@Nonnull final PermissionHolder caller, @Nonnull final Caption permission) {
+        return caller.hasPermission(permission.getTranslated());
     }
 
     /**
-     * Check if a {@link PlotPlayer} has a permission.
+     * Check if the owner of the profile has a given (global) permission
      *
-     * @param player
-     * @param permission
-     * @return
+     * @param permission Permission
+     * @return {@code true} if the owner has the given permission, else {@code false}
      */
-    public static boolean hasPermission(PlotPlayer<?> player, String permission) {
-        if (!Settings.Enabled_Components.PERMISSION_CACHE) {
-            return hasPermission((CommandCaller) player, permission);
-        }
-        HashMap<String, Boolean> map = player.getMeta("perm");
-        if (map != null) {
-            Boolean result = map.get(permission);
-            if (result != null) {
-                return result;
-            }
-        } else {
-            map = new HashMap<>();
-            player.setMeta("perm", map);
-        }
-        boolean result = hasPermission((CommandCaller) player, permission);
-        map.put(permission, result);
-        return result;
-    }
-
-    /**
-     * Check if a {@code CommandCaller} has a permission.
-     *
-     * @param caller
-     * @param permission
-     * @return
-     */
-    public static boolean hasPermission(CommandCaller caller, String permission) {
-        if (caller.hasPermission(permission)) {
-            return true;
-        } else if (caller.isPermissionSet(permission)) {
-            return false;
-        }
-        if (caller.hasPermission(Captions.PERMISSION_ADMIN.getTranslated())) {
-            return true;
-        }
-        permission = permission.toLowerCase().replaceAll("^[^a-z|0-9|\\.|_|-]", "");
-        String[] nodes = permission.split("\\.");
-        StringBuilder n = new StringBuilder();
-        for (int i = 0; i <= (nodes.length - 1); i++) {
-            n.append(nodes[i] + ".");
-            String combined = n + Captions.PERMISSION_STAR.getTranslated();
-            if (!permission.equals(combined)) {
-                if (caller.hasPermission(combined)) {
-                    return true;
-                } else if (caller.isPermissionSet(combined)) {
-                    return false;
-                }
-            }
-        }
-        return false;
+    public static boolean hasPermission(@Nonnull final PermissionHolder caller, @Nonnull final String permission) {
+        return caller.hasPermission(permission);
     }
 
     /**
@@ -121,7 +72,7 @@ public class Permissions {
      * @param notify
      * @return
      */
-    public static boolean hasPermission(PlotPlayer player, String permission, boolean notify) {
+    public static boolean hasPermission(PlotPlayer<?> player, String permission, boolean notify) {
         if (!hasPermission(player, permission)) {
             if (notify) {
                 MainUtil.sendMessage(player, Captions.NO_PERMISSION_EVENT, permission);
@@ -131,7 +82,7 @@ public class Permissions {
         return true;
     }
 
-    public static int hasPermissionRange(PlotPlayer player, Captions perm, int range) {
+    public static int hasPermissionRange(PlotPlayer<?> player, Captions perm, int range) {
         return hasPermissionRange(player, perm.getTranslated(), range);
     }
 
@@ -140,12 +91,12 @@ public class Permissions {
      * - Excessively high values will lag<br>
      * - The default range that is checked is {@link Settings.Limit#MAX_PLOTS}<br>
      *
-     * @param player
+     * @param player Player to check for
      * @param stub   The permission stub to check e.g. for `plots.plot.#` the stub is `plots.plot`
      * @param range  The range to check
      * @return The highest permission they have within that range
      */
-    public static int hasPermissionRange(PlotPlayer player, String stub, int range) {
+    public static int hasPermissionRange(PlotPlayer<?> player, String stub, int range) {
         return player.hasPermissionRange(stub, range);
     }
 }

Core/src/main/java/com/plotsquared/core/util/PlayerManager.java

@@ -239,7 +239,7 @@ public abstract class PlayerManager<P extends PlotPlayer<? extends T>, T> {
 
     /**
      * Get a plot player from a platform player object. This method requires
-     * that the caller actually knows that the player exists.
+     * that the caller actually knows that the player exists and is online.
      * <p>
      * The method will throw an exception if there is no such
      * player online.

Core/src/main/java/com/plotsquared/core/util/WEManager.java

@@ -28,6 +28,8 @@ package com.plotsquared.core.util;
 import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.Settings;
 import com.plotsquared.core.location.Location;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -100,19 +102,22 @@ public class WEManager {
         }
         boolean allowMember = player.hasPermission("plots.worldedit.member");
         Plot plot = player.getCurrentPlot();
-        if (plot == null) {
-            plot = player.getMeta("WorldEditRegionPlot");
-        }
-        if (plot != null && (!Settings.Done.RESTRICT_BUILDING || !DoneFlag.isDone(plot)) && (
-            (allowMember && plot.isAdded(uuid)) || (!allowMember && (plot.isOwner(uuid)) || plot
-                .getTrusted().contains(uuid))) && !plot.getFlag(NoWorldeditFlag.class)) {
-            for (CuboidRegion region : plot.getRegions()) {
-                BlockVector3 pos1 = region.getMinimumPoint().withY(area.getMinBuildHeight());
-                BlockVector3 pos2 = region.getMaximumPoint().withY(area.getMaxBuildHeight());
-                CuboidRegion copy = new CuboidRegion(pos1, pos2);
-                regions.add(copy);
+        try (final MetaDataAccess<Plot> metaDataAccess =
+            player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_WORLD_EDIT_REGION_PLOT)) {
+            if (plot == null) {
+                plot = metaDataAccess.get().orElse(null);
+            }
+            if (plot != null && (!Settings.Done.RESTRICT_BUILDING || !DoneFlag.isDone(plot)) && (
+                (allowMember && plot.isAdded(uuid)) || (!allowMember && (plot.isOwner(uuid)) || plot
+                    .getTrusted().contains(uuid))) && !plot.getFlag(NoWorldeditFlag.class)) {
+                for (CuboidRegion region : plot.getRegions()) {
+                    BlockVector3 pos1 = region.getMinimumPoint().withY(area.getMinBuildHeight());
+                    BlockVector3 pos2 = region.getMaximumPoint().withY(area.getMaxBuildHeight());
+                    CuboidRegion copy = new CuboidRegion(pos1, pos2);
+                    regions.add(copy);
+                }
+                metaDataAccess.set(plot);
             }
-            player.setMeta("WorldEditRegionPlot", plot);
         }
         return regions;
     }

Core/src/main/java/com/plotsquared/core/util/WorldUtil.java

@@ -359,14 +359,6 @@ public abstract class WorldUtil {
      */
     public abstract boolean isBlockSame(@Nonnull BlockState block1, @Nonnull BlockState block2);
 
-    /**
-     * Get a player object for the player with the given UUID
-     *
-     * @param uuid Player UUID
-     * @return Player object
-     */
-    @Nonnull public abstract PlotPlayer<?> getPlayer(@Nonnull UUID uuid);
-
     /**
      * Get the player health
      *

Core/src/main/java/com/plotsquared/core/util/task/AutoClaimFinishTask.java

@@ -30,6 +30,8 @@ import com.plotsquared.core.configuration.Captions;
 import com.plotsquared.core.events.PlotMergeEvent;
 import com.plotsquared.core.events.Result;
 import com.plotsquared.core.location.Direction;
+import com.plotsquared.core.player.MetaDataAccess;
+import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -50,7 +52,10 @@ public final class AutoClaimFinishTask implements Callable<Boolean> {
     private final EventDispatcher eventDispatcher;
 
     @Override public Boolean call() {
-        player.deleteMeta(Auto.class.getName());
+        try (final MetaDataAccess<Boolean> autoAccess
+            = player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_AUTO)) {
+            autoAccess.remove();
+        }
         if (plot == null) {
             sendMessage(player, Captions.NO_FREE_PLOTS);
             return false;