Merge branch 'dev'

build.gradle.kts

@@ -10,7 +10,7 @@ import java.net.URL
 val stdout = PrintWriter("gradle-output.txt")
 
 group = "io.dico"
-version = "0.1"
+version = "0.2"
 
 plugins {
     java
@@ -51,7 +51,7 @@ project(":dicore3:dicore3-command") {
     dependencies {
         c.kotlinStd(kotlin("stdlib-jdk8"))
         c.kotlinStd(kotlin("reflect"))
-        c.kotlinStd(kotlinx("coroutines-core:0.23.4"))
+        c.kotlinStd(kotlinx("coroutines-core:0.24.0"))
 
         compile(project(":dicore3:dicore3-core"))
         compile("com.thoughtworks.paranamer:paranamer:2.8")
@@ -72,6 +72,7 @@ dependencies {
     compile("org.jetbrains.exposed:exposed:0.10.3") { isTransitive = false }
     compile("joda-time:joda-time:2.10")
     compile("com.zaxxer:HikariCP:3.2.0")
+    compile("ch.qos.logback:logback-classic:1.2.3")
 
     val jacksonVersion = "2.9.6"
     compile("com.fasterxml.jackson.core:jackson-core:$jacksonVersion")
@@ -86,6 +87,8 @@ tasks {
     val compileKotlin by getting(KotlinCompile::class) {
         kotlinOptions {
             javaParameters = true
+            suppressWarnings = true
+            //freeCompilerArgs = listOf("-XXLanguage:+InlineClasses", "-Xuse-experimental=kotlin.Experimental")
         }
     }
 

dicore3/command/src/main/java/io/dico/dicore/command/chat/AbstractChatController.java

@@ -36,7 +36,7 @@ public class AbstractChatController implements IChatController {
     @Override
     public void sendMessage(CommandSender sender, EMessageType type, String message) {
         if (message != null && !message.isEmpty()) {
-            sender.sendMessage(getMessagePrefixForType(type) + getChatFormatForType(type) + message);
+            sender.sendMessage(filterMessage(getMessagePrefixForType(type) + getChatFormatForType(type) + message));
         }
     }
 

src/main/kotlin/io/dico/parcels2/AddedData.kt

@@ -0,0 +1,57 @@
+package io.dico.parcels2
+
+import io.dico.parcels2.util.uuid
+import org.bukkit.OfflinePlayer
+import java.util.UUID
+
+typealias MutableAddedDataMap = MutableMap<UUID, AddedStatus>
+typealias AddedDataMap = Map<UUID, AddedStatus>
+
+interface AddedData {
+    val addedMap: AddedDataMap
+
+    fun getAddedStatus(uuid: UUID): AddedStatus
+    fun setAddedStatus(uuid: UUID, status: AddedStatus): Boolean
+
+    fun compareAndSetAddedStatus(uuid: UUID, expect: AddedStatus, status: AddedStatus): Boolean =
+        (getAddedStatus(uuid) == expect).also { if (it) setAddedStatus(uuid, status) }
+
+    fun isAllowed(uuid: UUID) = getAddedStatus(uuid) == AddedStatus.ALLOWED
+    fun allow(uuid: UUID) = setAddedStatus(uuid, AddedStatus.ALLOWED)
+    fun disallow(uuid: UUID) = compareAndSetAddedStatus(uuid, AddedStatus.ALLOWED, AddedStatus.DEFAULT)
+    fun isBanned(uuid: UUID) = getAddedStatus(uuid) == AddedStatus.BANNED
+    fun ban(uuid: UUID) = setAddedStatus(uuid, AddedStatus.BANNED)
+    fun unban(uuid: UUID) = compareAndSetAddedStatus(uuid, AddedStatus.BANNED, AddedStatus.DEFAULT)
+
+    fun isAllowed(player: OfflinePlayer) = isAllowed(player.uuid)
+    fun allow(player: OfflinePlayer) = allow(player.uuid)
+    fun disallow(player: OfflinePlayer) = disallow(player.uuid)
+    fun isBanned(player: OfflinePlayer) = isBanned(player.uuid)
+    fun ban(player: OfflinePlayer) = ban(player.uuid)
+    fun unban(player: OfflinePlayer) = unban(player.uuid)
+}
+
+open class AddedDataHolder(override var addedMap: MutableAddedDataMap = mutableMapOf()) : AddedData {
+    override fun getAddedStatus(uuid: UUID): AddedStatus = addedMap.getOrDefault(uuid, AddedStatus.DEFAULT)
+    override fun setAddedStatus(uuid: UUID, status: AddedStatus): Boolean = status.takeIf { it != AddedStatus.DEFAULT }
+        ?.let { addedMap.put(uuid, it) != it }
+        ?: addedMap.remove(uuid) != null
+}
+
+enum class AddedStatus {
+    DEFAULT,
+    ALLOWED,
+    BANNED;
+
+    val isDefault get() = this == DEFAULT
+    val isAllowed get() = this == ALLOWED
+    val isBanned get() = this == BANNED
+}
+
+interface GlobalAddedData : AddedData {
+    val owner: ParcelOwner
+}
+
+interface GlobalAddedDataManager {
+    operator fun get(owner: ParcelOwner): GlobalAddedData
+}

src/main/kotlin/io/dico/parcels2/Options.kt

@@ -1,27 +1,33 @@
 package io.dico.parcels2
 
-
 import com.fasterxml.jackson.annotation.JsonIgnore
 import io.dico.parcels2.blockvisitor.TickWorktimeOptions
+import io.dico.parcels2.defaultimpl.DefaultGeneratorOptions
 import io.dico.parcels2.storage.Storage
 import io.dico.parcels2.storage.StorageFactory
 import io.dico.parcels2.storage.yamlObjectMapper
-import org.bukkit.Bukkit.createBlockData
 import org.bukkit.GameMode
 import org.bukkit.Material
-import org.bukkit.block.Biome
-import org.bukkit.block.data.BlockData
 import java.io.Reader
 import java.io.Writer
-import java.util.*
+import java.util.EnumSet
 
 class Options {
-    var worlds: Map<String, WorldOptions> = HashMap()
+    var worlds: Map<String, WorldOptionsHolder> = hashMapOf()
         private set
     var storage: StorageOptions = StorageOptions("postgresql", DataConnectionOptions())
     var tickWorktime: TickWorktimeOptions = TickWorktimeOptions(20, 1)
 
-    fun addWorld(name: String, options: WorldOptions) = (worlds as MutableMap).put(name, options)
+    fun addWorld(name: String,
+                 generatorOptions: GeneratorOptions? = null,
+                 worldOptions: WorldOptions? = null) {
+        val optionsHolder = WorldOptionsHolder(
+            generatorOptions ?: DefaultGeneratorOptions(),
+            worldOptions ?: WorldOptions()
+        )
+
+        (worlds as MutableMap).put(name, optionsHolder)
+    }
 
     fun writeTo(writer: Writer) = yamlObjectMapper.writeValue(writer, this)
 
@@ -31,6 +37,9 @@ class Options {
 
 }
 
+class WorldOptionsHolder(var generator: GeneratorOptions = DefaultGeneratorOptions(),
+                         var runtime: WorldOptions = WorldOptions())
+
 data class WorldOptions(var gameMode: GameMode? = GameMode.CREATIVE,
                         var dayTime: Boolean = true,
                         var noWeather: Boolean = true,
@@ -42,8 +51,7 @@ data class WorldOptions(var gameMode: GameMode? = GameMode.CREATIVE,
                         var blockPortalCreation: Boolean = true,
                         var blockMobSpawning: Boolean = true,
                         var blockedItems: Set<Material> = EnumSet.of(Material.FLINT_AND_STEEL, Material.SNOWBALL),
-                        var axisLimit: Int = 10,
-                        var generator: GeneratorOptions = DefaultGeneratorOptions()) {
+                        var axisLimit: Int = 10) {
 
 }
 
@@ -51,23 +59,7 @@ abstract class GeneratorOptions {
 
     abstract fun generatorFactory(): GeneratorFactory
 
-    fun getGenerator(worlds: Worlds, worldName: String) = generatorFactory().newParcelGenerator(worlds, worldName, this)
-
-}
-
-data class DefaultGeneratorOptions(var defaultBiome: Biome = Biome.JUNGLE,
-                                   var wallType: BlockData = createBlockData(Material.STONE_SLAB),
-                                   var floorType: BlockData = createBlockData(Material.QUARTZ_BLOCK),
-                                   var fillType: BlockData = createBlockData(Material.QUARTZ_BLOCK),
-                                   var pathMainType: BlockData = createBlockData(Material.SANDSTONE),
-                                   var pathAltType: BlockData = createBlockData(Material.REDSTONE_BLOCK),
-                                   var parcelSize: Int = 101,
-                                   var pathSize: Int = 9,
-                                   var floorHeight: Int = 64,
-                                   var offsetX: Int = 0,
-                                   var offsetZ: Int = 0) : GeneratorOptions() {
-
-    override fun generatorFactory(): GeneratorFactory = DefaultParcelGenerator.Factory
+    fun newGenerator(worldName: String) = generatorFactory().newParcelGenerator(worldName, this)
 
 }
 
@@ -104,4 +96,9 @@ data class DataConnectionOptions(val address: String = "localhost",
 
 }
 
-data class DataFileOptions(val location: String = "/flatfile-storage/")
+data class DataFileOptions(val location: String = "/flatfile-storage/")
+
+class MigrationOptions() {
+
+
+}

src/main/kotlin/io/dico/parcels2/Parcel.kt

@@ -1,42 +1,40 @@
 package io.dico.parcels2
 
 import io.dico.parcels2.util.Vec2i
-import io.dico.parcels2.util.getPlayerName
 import io.dico.parcels2.util.hasBuildAnywhere
-import io.dico.parcels2.util.isValid
-import io.dico.parcels2.util.uuid
-import org.bukkit.Bukkit
 import org.bukkit.OfflinePlayer
 import org.bukkit.entity.Player
 import org.joda.time.DateTime
-import java.util.*
+import java.util.UUID
 
-interface AddedData {
-    val added: Map<UUID, AddedStatus>
+/**
+ * Parcel implementation of ParcelData will update the database when changes are made.
+ * To change the data without updating the database, defer to the data delegate instance.
+ *
+ * This should be used for example in database query callbacks.
+ * However, this implementation is intentionally not thread-safe.
+ * Therefore, database query callbacks should schedule their updates using the bukkit scheduler.
+ */
+interface Parcel : ParcelData {
+    val id: ParcelId
+    val world: ParcelWorld
+    val pos: Vec2i
+    val x: Int
+    val z: Int
+    val data: ParcelData
+    val infoString: String
+    val hasBlockVisitors: Boolean
 
-    fun getAddedStatus(uuid: UUID): AddedStatus
-    fun setAddedStatus(uuid: UUID, status: AddedStatus): Boolean
-    
-    fun compareAndSetAddedStatus(uuid: UUID, expect: AddedStatus, status: AddedStatus): Boolean =
-        (getAddedStatus(uuid) == expect).also { if (it) setAddedStatus(uuid, status) }
-    
-    fun isAllowed(uuid: UUID) = getAddedStatus(uuid) == AddedStatus.ALLOWED
-    fun allow(uuid: UUID) = setAddedStatus(uuid, AddedStatus.ALLOWED)
-    fun disallow(uuid: UUID) = compareAndSetAddedStatus(uuid, AddedStatus.ALLOWED, AddedStatus.DEFAULT)
-    fun isBanned(uuid: UUID) = getAddedStatus(uuid) == AddedStatus.BANNED
-    fun ban(uuid: UUID) = setAddedStatus(uuid, AddedStatus.BANNED)
-    fun unban(uuid: UUID) = compareAndSetAddedStatus(uuid, AddedStatus.BANNED, AddedStatus.DEFAULT)
+    fun copyDataIgnoringDatabase(data: ParcelData)
 
-    fun isAllowed(player: OfflinePlayer) = isAllowed(player.uuid)
-    fun allow(player: OfflinePlayer) = allow(player.uuid)
-    fun disallow(player: OfflinePlayer) = disallow(player.uuid)
-    fun isBanned(player: OfflinePlayer) = isBanned(player.uuid)
-    fun ban(player: OfflinePlayer) = ban(player.uuid)
-    fun unban(player: OfflinePlayer) = unban(player.uuid)
+    fun copyData(data: ParcelData)
+
+    fun dispose()
 }
 
 interface ParcelData : AddedData {
     var owner: ParcelOwner?
+    val since: DateTime?
 
     fun canBuild(player: OfflinePlayer, checkAdmin: Boolean = true, checkGlobal: Boolean = true): Boolean
 
@@ -48,85 +46,10 @@ interface ParcelData : AddedData {
     }
 }
 
-/**
- * Parcel implementation of ParcelData will update the database when changes are made.
- * To change the data without updating the database, defer to the data delegate instance.
- *
- * This should be used for example in database query callbacks.
- * However, this implementation is intentionally not thread-safe.
- * Therefore, database query callbacks should schedule their updates using the bukkit scheduler.
- */
-class Parcel(val world: ParcelWorld, val pos: Vec2i) : ParcelData {
-    val id get() = "${pos.x}:${pos.z}"
-    val homeLocation get() = world.generator.getHomeLocation(this)
-    private var blockVisitors = 0
-
-    val infoString: String
-        get() {
-            return "$id; owned by ${owner?.let { it.name ?: Bukkit.getOfflinePlayer(it.uuid).name }}"
-        }
-
-    var data: ParcelData = ParcelDataHolder(); private set
-
-    fun copyDataIgnoringDatabase(data: ParcelData) {
-        this.data = data
-    }
-
-    fun copyData(data: ParcelData) {
-        world.storage.setParcelData(this, data)
-        this.data = data
-    }
-
-    override val added: Map<UUID, AddedStatus> get() = data.added
-    override fun getAddedStatus(uuid: UUID) = data.getAddedStatus(uuid)
-    override fun isBanned(uuid: UUID) = data.isBanned(uuid)
-    override fun isAllowed(uuid: UUID) = data.isAllowed(uuid)
-    override fun canBuild(player: OfflinePlayer, checkAdmin: Boolean, checkGlobal: Boolean) = data.canBuild(player)
-
-    override var owner: ParcelOwner?
-        get() = data.owner
-        set(value) {
-            if (data.owner != value) {
-                world.storage.setParcelOwner(this, value)
-                data.owner = value
-            }
-        }
-
-    override fun setAddedStatus(uuid: UUID, status: AddedStatus): Boolean {
-        return data.setAddedStatus(uuid, status).also {
-            if (it) world.storage.setParcelPlayerState(this, uuid, status.asBoolean)
-        }
-    }
-
-    override var allowInteractInputs: Boolean
-        get() = data.allowInteractInputs
-        set(value) {
-            if (data.allowInteractInputs == value) return
-            world.storage.setParcelAllowsInteractInputs(this, value)
-            data.allowInteractInputs = value
-        }
-
-    override var allowInteractInventory: Boolean
-        get() = data.allowInteractInventory
-        set(value) {
-            if (data.allowInteractInventory == value) return
-            world.storage.setParcelAllowsInteractInventory(this, value)
-            data.allowInteractInventory = value
-        }
-
-    var hasBlockVisitors: Boolean = false; private set
-}
-
-open class AddedDataHolder : AddedData {
-    override var added = mutableMapOf<UUID, AddedStatus>()
-    override fun getAddedStatus(uuid: UUID): AddedStatus = added.getOrDefault(uuid, AddedStatus.DEFAULT)
-    override fun setAddedStatus(uuid: UUID, status: AddedStatus): Boolean = status.takeIf { it != AddedStatus.DEFAULT }
-        ?.let { added.put(uuid, it) != it }
-        ?: added.remove(uuid) != null
-}
-
 class ParcelDataHolder : AddedDataHolder(), ParcelData {
+
     override var owner: ParcelOwner? = null
+    override var since: DateTime? = null
     override fun canBuild(player: OfflinePlayer, checkAdmin: Boolean, checkGlobal: Boolean) = isAllowed(player.uniqueId)
         || owner.let { it != null && it.matches(player, allowNameMatch = false) }
         || (checkAdmin && player is Player && player.hasBuildAnywhere)
@@ -135,55 +58,3 @@ class ParcelDataHolder : AddedDataHolder(), ParcelData {
     override var allowInteractInventory = true
 }
 
-enum class AddedStatus {
-    DEFAULT,
-    ALLOWED,
-    BANNED;
-
-    val asBoolean
-        get() = when (this) {
-            DEFAULT -> null
-            ALLOWED -> true
-            BANNED -> false
-        }
-}
-
-@Suppress("UsePropertyAccessSyntax")
-class ParcelOwner(val uuid: UUID? = null,
-                  name: String? = null,
-                  val since: DateTime? = null) {
-
-    companion object {
-        fun create(uuid: UUID?, name: String?, time: DateTime? = null): ParcelOwner? {
-            return uuid?.let { ParcelOwner(uuid, name, time) }
-                ?: name?.let { ParcelOwner(uuid, name, time) }
-        }
-    }
-
-    val name: String?
-
-    init {
-        uuid ?: name ?: throw IllegalArgumentException("uuid and/or name must be present")
-
-        if (name != null) this.name = name
-        else {
-            val offlinePlayer = Bukkit.getOfflinePlayer(uuid).takeIf { it.isValid }
-            this.name = offlinePlayer?.name
-        }
-    }
-
-    val playerName get() = getPlayerName(uuid, name)
-
-    fun matches(player: OfflinePlayer, allowNameMatch: Boolean = false): Boolean {
-        return uuid?.let { it == player.uniqueId } ?: false
-            || (allowNameMatch && name?.let { it == player.name } ?: false)
-    }
-
-    val onlinePlayer: Player? get() = uuid?.let { Bukkit.getPlayer(uuid) }
-    val onlinePlayerAllowingNameMatch: Player? get() = onlinePlayer ?: name?.let { Bukkit.getPlayer(name) }
-
-    @Suppress("DEPRECATION")
-    val offlinePlayer
-        get() = (uuid?.let { Bukkit.getOfflinePlayer(it) } ?: Bukkit.getOfflinePlayer(name))
-            ?.takeIf { it.isValid }
-}

src/main/kotlin/io/dico/parcels2/ParcelGenerator.kt

@@ -0,0 +1,83 @@
+package io.dico.parcels2
+
+import io.dico.parcels2.blockvisitor.RegionTraversal
+import io.dico.parcels2.blockvisitor.Worker
+import io.dico.parcels2.blockvisitor.WorktimeLimiter
+import io.dico.parcels2.defaultimpl.DefaultParcelGenerator
+import io.dico.parcels2.util.Vec2i
+import org.bukkit.Chunk
+import org.bukkit.Location
+import org.bukkit.World
+import org.bukkit.block.Biome
+import org.bukkit.block.Block
+import org.bukkit.entity.Entity
+import org.bukkit.generator.BlockPopulator
+import org.bukkit.generator.ChunkGenerator
+import java.util.HashMap
+import java.util.Random
+import kotlin.reflect.KClass
+
+object GeneratorFactories {
+    private val map: MutableMap<String, GeneratorFactory> = HashMap()
+
+    fun registerFactory(generator: GeneratorFactory): Boolean = map.putIfAbsent(generator.name, generator) == null
+
+    fun getFactory(name: String): GeneratorFactory? = map.get(name)
+
+    init {
+        registerFactory(DefaultParcelGenerator.Factory)
+    }
+}
+
+interface GeneratorFactory {
+    val name: String
+
+    val optionsClass: KClass<out GeneratorOptions>
+
+    fun newParcelGenerator(worldName: String, options: GeneratorOptions): ParcelGenerator
+}
+
+abstract class ParcelGenerator : ChunkGenerator() {
+    abstract val world: World
+
+    abstract override fun generateChunkData(world: World?, random: Random?, chunkX: Int, chunkZ: Int, biome: BiomeGrid?): ChunkData
+
+    abstract fun populate(world: World?, random: Random?, chunk: Chunk?)
+
+    abstract override fun getFixedSpawnLocation(world: World?, random: Random?): Location
+
+    override fun getDefaultPopulators(world: World?): MutableList<BlockPopulator> {
+        return mutableListOf(object : BlockPopulator() {
+            override fun populate(world: World?, random: Random?, chunk: Chunk?) {
+                this@ParcelGenerator.populate(world, random, chunk)
+            }
+        })
+    }
+
+    abstract fun makeParcelBlockManager(worktimeLimiter: WorktimeLimiter): ParcelBlockManager
+
+    abstract fun makeParcelLocator(container: ParcelContainer): ParcelLocator
+}
+
+interface ParcelBlockManager {
+    val world: World
+    val worktimeLimiter: WorktimeLimiter
+
+    fun getBottomBlock(parcel: ParcelId): Vec2i
+
+    fun getHomeLocation(parcel: ParcelId): Location
+
+    fun setOwnerBlock(parcel: ParcelId, owner: ParcelOwner?)
+
+    @Deprecated("")
+    fun getEntities(parcel: ParcelId): Collection<Entity> = TODO()
+
+    @Deprecated("")
+    fun getBlocks(parcel: ParcelId, yRange: IntRange = 0..255): Iterator<Block> = TODO()
+
+    fun setBiome(parcel: ParcelId, biome: Biome): Worker
+
+    fun clearParcel(parcel: ParcelId): Worker
+
+    fun doBlockOperation(parcel: ParcelId, direction: RegionTraversal = RegionTraversal.DOWNWARD, operation: (Block) -> Unit): Worker
+}

src/main/kotlin/io/dico/parcels2/ParcelId.kt

@@ -0,0 +1,49 @@
+package io.dico.parcels2
+
+import io.dico.parcels2.util.Vec2i
+import org.bukkit.Bukkit
+import org.bukkit.World
+import java.util.UUID
+
+/**
+ * Used by storage backing options to encompass the identity of a world
+ * Does NOT support equality operator.
+ */
+interface ParcelWorldId {
+    val name: String
+    val uid: UUID?
+    fun equals(id: ParcelWorldId): Boolean = name == name || (uid != null && uid == id.uid)
+
+    val bukkitWorld: World? get() = Bukkit.getWorld(name) ?: uid?.let { Bukkit.getWorld(it) }
+
+    companion object {
+        operator fun invoke(worldName: String, worldUid: UUID?): ParcelWorldId = ParcelWorldIdImpl(worldName, worldUid)
+        operator fun invoke(worldName: String): ParcelWorldId = ParcelWorldIdImpl(worldName, null)
+    }
+}
+
+/**
+ * Used by storage backing options to encompass the location of a parcel
+ * Does NOT support equality operator.
+ */
+interface ParcelId {
+    val worldId: ParcelWorldId
+    val x: Int
+    val z: Int
+    val pos: Vec2i get() = Vec2i(x, z)
+    fun equals(id: ParcelId): Boolean = x == id.x && z == id.z && worldId.equals(id.worldId)
+
+    companion object {
+        operator fun invoke(worldId: ParcelWorldId, pos: Vec2i) = invoke(worldId, pos.x, pos.z)
+        operator fun invoke(worldName: String, worldUid: UUID?, pos: Vec2i) = invoke(worldName, worldUid, pos.x, pos.z)
+        operator fun invoke(worldName: String, worldUid: UUID?, x: Int, z: Int) = invoke(ParcelWorldId(worldName, worldUid), x, z)
+        operator fun invoke(worldId: ParcelWorldId, x: Int, z: Int): ParcelId = ParcelIdImpl(worldId, x, z)
+    }
+}
+
+private class ParcelWorldIdImpl(override val name: String,
+                                override val uid: UUID?) : ParcelWorldId
+
+private class ParcelIdImpl(override val worldId: ParcelWorldId,
+                           override val x: Int,
+                           override val z: Int) : ParcelId

src/main/kotlin/io/dico/parcels2/ParcelOwner.kt

@@ -0,0 +1,52 @@
+@file:Suppress("unused", "UsePropertyAccessSyntax", "DEPRECATION")
+
+package io.dico.parcels2
+
+import io.dico.parcels2.util.getPlayerNameOrDefault
+import io.dico.parcels2.util.isValid
+import io.dico.parcels2.util.uuid
+import org.bukkit.Bukkit
+import org.bukkit.OfflinePlayer
+import org.bukkit.entity.Player
+import java.util.UUID
+
+class ParcelOwner(val uuid: UUID?,
+                  val name: String?) {
+    val notNullName: String by lazy { name ?: getPlayerNameOrDefault(uuid!!) }
+
+    constructor(name: String) : this(null, name)
+    constructor(uuid: UUID) : this(uuid, null)
+    constructor(player: OfflinePlayer) : this(player.uuid, player.name)
+
+    companion object {
+        fun nameless(player: OfflinePlayer) = ParcelOwner(player.uuid, null)
+    }
+
+    inline val hasUUID: Boolean get() = uuid != null
+
+    val onlinePlayer: Player? get() = uuid?.let { Bukkit.getPlayer(uuid) }
+
+    val onlinePlayerAllowingNameMatch: Player? get() = onlinePlayer ?: name?.let { Bukkit.getPlayerExact(name) }
+    val offlinePlayer: OfflinePlayer? get() = uuid?.let { Bukkit.getOfflinePlayer(it).takeIf { it.isValid } }
+    val offlinePlayerAllowingNameMatch: OfflinePlayer?
+        get() = offlinePlayer ?: Bukkit.getOfflinePlayer(name).takeIf { it.isValid }
+
+    fun matches(player: OfflinePlayer, allowNameMatch: Boolean = false): Boolean {
+        return uuid?.let { it == player.uniqueId } ?: false
+            || (allowNameMatch && name?.let { it == player.name } ?: false)
+    }
+
+    fun equals(other: ParcelOwner): Boolean {
+        return if (hasUUID) other.hasUUID && uuid == other.uuid
+        else !other.hasUUID && name == other.name
+    }
+
+    override fun equals(other: Any?): Boolean {
+        return other is ParcelOwner && equals(other)
+    }
+
+    override fun hashCode(): Int {
+        return if (hasUUID) uuid!!.hashCode() else name!!.hashCode()
+    }
+
+}

src/main/kotlin/io/dico/parcels2/ParcelWorld.kt

@@ -1,230 +1,86 @@
 package io.dico.parcels2
 
-import io.dico.parcels2.storage.SerializableParcel
-import io.dico.parcels2.storage.SerializableWorld
 import io.dico.parcels2.storage.Storage
 import io.dico.parcels2.util.Vec2i
-import io.dico.parcels2.util.doAwait
 import io.dico.parcels2.util.floor
-import kotlinx.coroutines.experimental.launch
-import org.bukkit.Bukkit
 import org.bukkit.Location
 import org.bukkit.World
-import org.bukkit.WorldCreator
 import org.bukkit.block.Block
 import org.bukkit.entity.Entity
-import org.bukkit.entity.Player
-import java.util.*
-import kotlin.coroutines.experimental.buildIterator
-import kotlin.coroutines.experimental.buildSequence
-import kotlin.reflect.jvm.javaMethod
-import kotlin.reflect.jvm.kotlinFunction
+import java.util.UUID
 
-class Worlds(val plugin: ParcelsPlugin) {
-    val worlds: Map<String, ParcelWorld> get() = _worlds
-    private val _worlds: MutableMap<String, ParcelWorld> = HashMap()
+interface ParcelProvider {
+    val worlds: Map<String, ParcelWorld>
 
-    fun getWorld(name: String): ParcelWorld? = _worlds[name]
+    fun getWorldById(id: ParcelWorldId): ParcelWorld?
+
+    fun getParcelById(id: ParcelId): Parcel?
+
+    fun getWorld(name: String): ParcelWorld?
 
     fun getWorld(world: World): ParcelWorld? = getWorld(world.name)
 
-    fun getParcelAt(block: Block): Parcel? = getParcelAt(block.world, block.x, block.z)
+    fun getWorld(block: Block): ParcelWorld? = getWorld(block.world)
 
-    fun getParcelAt(player: Player): Parcel? = getParcelAt(player.location)
+    fun getWorld(loc: Location): ParcelWorld? = getWorld(loc.world)
 
-    fun getParcelAt(location: Location): Parcel? = getParcelAt(location.world, location.x.floor(), location.z.floor())
+    fun getWorld(entity: Entity): ParcelWorld? = getWorld(entity.location)
+
+    fun getParcelAt(worldName: String, x: Int, z: Int): Parcel? = getWorld(worldName)?.locator?.getParcelAt(x, z)
 
     fun getParcelAt(world: World, x: Int, z: Int): Parcel? = getParcelAt(world.name, x, z)
 
-    fun getParcelAt(world: String, x: Int, z: Int): Parcel? {
-        with(getWorld(world) ?: return null) {
-            return generator.parcelAt(x, z)
-        }
-    }
+    fun getParcelAt(world: World, vec: Vec2i): Parcel? = getParcelAt(world, vec.x, vec.z)
 
-    init {
-        val function = ::loadWorlds
-        function.javaMethod!!.kotlinFunction
-    }
+    fun getParcelAt(loc: Location): Parcel? = getParcelAt(loc.world, loc.x.floor(), loc.z.floor())
 
-    operator fun SerializableParcel.invoke(): Parcel? {
-        return world()?.parcelByID(pos)
-    }
+    fun getParcelAt(entity: Entity): Parcel? = getParcelAt(entity.location)
 
-    operator fun SerializableWorld.invoke(): ParcelWorld? {
-        return world?.let { getWorld(it) }
-    }
+    fun getParcelAt(block: Block): Parcel? = getParcelAt(block.world, block.x, block.z)
 
-    fun loadWorlds(options: Options) {
-        for ((worldName, worldOptions) in options.worlds.entries) {
-            val world: ParcelWorld
-            try {
+    fun getWorldGenerator(worldName: String): ParcelGenerator?
 
-                world = ParcelWorld(
-                    worldName,
-                    worldOptions,
-                    worldOptions.generator.getGenerator(this, worldName),
-                    plugin.storage)
-
-            } catch (ex: Exception) {
-                ex.printStackTrace()
-                continue
-            }
-
-            _worlds.put(worldName, world)
-
-            if (Bukkit.getWorld(worldName) == null) {
-                plugin.doAwait {
-                    cond = {
-                        try {
-                            // server.getDefaultGameMode() throws an error before any worlds are initialized.
-                            // createWorld() below calls that method.
-                            // Plugin needs to load on STARTUP for generators to be registered correctly.
-                            // Means we need to await the initial worlds getting loaded.
-
-                            plugin.server.defaultGameMode; true
-                        } catch (ex: Throwable) {
-                            false
-                        }
-                    }
-
-                    onSuccess = {
-                        val bworld = WorldCreator(worldName).generator(world.generator).createWorld()
-                        val spawn = world.generator.getFixedSpawnLocation(bworld, null)
-                        bworld.setSpawnLocation(spawn.x.floor(), spawn.y.floor(), spawn.z.floor())
-                    }
-                }
-            }
-
-        }
-
-    }
+    fun loadWorlds()
 }
 
-interface ParcelProvider {
+interface ParcelLocator {
+    val world: World
 
-    fun parcelAt(x: Int, z: Int): Parcel?
+    fun getParcelIdAt(x: Int, z: Int): ParcelId?
 
-    fun parcelAt(vec: Vec2i): Parcel? = parcelAt(vec.x, vec.z)
+    fun getParcelAt(x: Int, z: Int): Parcel?
 
-    fun parcelAt(loc: Location): Parcel? = parcelAt(loc.x.floor(), loc.z.floor())
+    fun getParcelAt(vec: Vec2i): Parcel? = getParcelAt(vec.x, vec.z)
 
-    fun parcelAt(entity: Entity): Parcel? = parcelAt(entity.location)
+    fun getParcelAt(loc: Location): Parcel? = getParcelAt(loc.x.floor(), loc.z.floor()).takeIf { loc.world == world }
 
-    fun parcelAt(block: Block): Parcel? = parcelAt(block.x, block.z)
-}
+    fun getParcelAt(entity: Entity): Parcel? = getParcelAt(entity.location).takeIf { entity.world == world }
 
-class ParcelWorld constructor(val name: String,
-                              val options: WorldOptions,
-                              val generator: ParcelGenerator,
-                              val storage: Storage) : ParcelProvider by generator, ParcelContainer {
-    val world: World by lazy {
-        Bukkit.getWorld(name) ?: throw NullPointerException("World $name does not appear to be loaded")
-    }
-    val container: ParcelContainer = DefaultParcelContainer(this, storage)
-
-    override fun parcelByID(x: Int, z: Int): Parcel? {
-        return container.parcelByID(x, z)
-    }
-
-    override fun nextEmptyParcel(): Parcel? {
-        return container.nextEmptyParcel()
-    }
-
-    fun parcelByID(id: Vec2i): Parcel? = parcelByID(id.x, id.z)
-
-    fun enforceOptionsIfApplicable() {
-        val world = world
-        val options = options
-        if (options.dayTime) {
-            world.setGameRuleValue("doDaylightCycle", "false")
-            world.setTime(6000)
-        }
-
-        if (options.noWeather) {
-            world.setStorm(false)
-            world.setThundering(false)
-            world.weatherDuration = Integer.MAX_VALUE
-        }
-
-        world.setGameRuleValue("doTileDrops", "${options.doTileDrops}")
-    }
-
-}
-
-interface ParcelContainer {
-
-    fun parcelByID(x: Int, z: Int): Parcel?
-
-    fun nextEmptyParcel(): Parcel?
+    fun getParcelAt(block: Block): Parcel? = getParcelAt(block.x, block.z).takeIf { block.world == world }
 
 }
 
 typealias ParcelContainerFactory = (ParcelWorld) -> ParcelContainer
 
-class DefaultParcelContainer(private val world: ParcelWorld,
-                             private val storage: Storage) : ParcelContainer {
-    private var parcels: Array<Array<Parcel>>
+interface ParcelContainer {
 
-    init {
-        parcels = initArray(world.options.axisLimit, world)
-    }
+    fun getParcelById(x: Int, z: Int): Parcel?
 
-    fun resizeIfSizeChanged() {
-        if (parcels.size / 2 != world.options.axisLimit) {
-            resize(world.options.axisLimit)
-        }
-    }
+    fun getParcelById(id: Vec2i): Parcel? = getParcelById(id.x, id.z)
 
-    fun resize(axisLimit: Int) {
-        parcels = initArray(axisLimit, world, this)
-    }
+    fun nextEmptyParcel(): Parcel?
 
-    fun initArray(axisLimit: Int, world: ParcelWorld, cur: DefaultParcelContainer? = null): Array<Array<Parcel>> {
-        val arraySize = 2 * axisLimit + 1
-        return Array(arraySize) {
-            val x = it - axisLimit
-            Array(arraySize) {
-                val z = it - axisLimit
-                cur?.parcelByID(x, z) ?: Parcel(world, Vec2i(x, z))
-            }
-        }
-    }
+}
 
-    override fun parcelByID(x: Int, z: Int): Parcel? {
-        return parcels.getOrNull(x + world.options.axisLimit)?.getOrNull(z + world.options.axisLimit)
-    }
-
-    override fun nextEmptyParcel(): Parcel? {
-        return walkInCircle().find { it.owner == null }
-    }
-
-    private fun walkInCircle(): Iterable<Parcel> = Iterable {
-        buildIterator {
-            val center = world.options.axisLimit
-            for (radius in 0..center) {
-                var x = center - radius; var z = center - radius
-                repeat(radius * 2) { yield(parcels[x++][z]) }
-                repeat(radius * 2) { yield(parcels[x][z++]) }
-                repeat(radius * 2) { yield(parcels[x--][z]) }
-                repeat(radius * 2) { yield(parcels[x][z--]) }
-            }
-        }
-    }
-
-    fun allParcels(): Sequence<Parcel> = buildSequence {
-        for (array in parcels) {
-            yieldAll(array.iterator())
-        }
-    }
-
-    fun loadAllData() {
-        val channel = storage.readParcelData(allParcels(), 100)
-        launch(storage.asyncDispatcher) {
-            for ((parcel, data) in channel) {
-                data?.let { parcel.copyDataIgnoringDatabase(it) }
-            }
-        }
-    }
-
-}
+interface ParcelWorld : ParcelLocator, ParcelContainer, ParcelBlockManager {
+    val id: ParcelWorldId
+    val name: String
+    val uid: UUID?
+    val options: WorldOptions
+    val generator: ParcelGenerator
+    val storage: Storage
+    val container: ParcelContainer
+    val locator: ParcelLocator
+    val blockManager: ParcelBlockManager
+    val globalAddedData: GlobalAddedDataManager
+}

src/main/kotlin/io/dico/parcels2/ParcelsPlugin.kt

@@ -6,31 +6,37 @@ import io.dico.dicore.command.ICommandDispatcher
 import io.dico.parcels2.blockvisitor.TickWorktimeLimiter
 import io.dico.parcels2.blockvisitor.WorktimeLimiter
 import io.dico.parcels2.command.getParcelCommands
+import io.dico.parcels2.defaultimpl.GlobalAddedDataManagerImpl
+import io.dico.parcels2.defaultimpl.ParcelProviderImpl
 import io.dico.parcels2.listener.ParcelEntityTracker
 import io.dico.parcels2.listener.ParcelListeners
 import io.dico.parcels2.storage.Storage
 import io.dico.parcels2.storage.yamlObjectMapper
+import io.dico.parcels2.util.FunctionHelper
 import io.dico.parcels2.util.tryCreate
-import kotlinx.coroutines.experimental.asCoroutineDispatcher
 import org.bukkit.Bukkit
+import org.bukkit.generator.ChunkGenerator
 import org.bukkit.plugin.java.JavaPlugin
+import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 import java.io.File
-import java.util.concurrent.Executor
 
-val logger = LoggerFactory.getLogger("ParcelsPlugin")
+val logger: Logger = LoggerFactory.getLogger("ParcelsPlugin")
 private inline val plogger get() = logger
 
 class ParcelsPlugin : JavaPlugin() {
     lateinit var optionsFile: File; private set
     lateinit var options: Options; private set
-    lateinit var worlds: Worlds; private set
+    lateinit var parcelProvider: ParcelProvider; private set
     lateinit var storage: Storage; private set
+    lateinit var globalAddedData: GlobalAddedDataManager; private set
 
     val registrator = Registrator(this)
     lateinit var entityTracker: ParcelEntityTracker; private set
     private var listeners: ParcelListeners? = null
     private var cmdDispatcher: ICommandDispatcher? = null
+
+    val functionHelper: FunctionHelper = FunctionHelper(this)
     val worktimeLimiter: WorktimeLimiter by lazy { TickWorktimeLimiter(this, options.tickWorktime) }
 
     override fun onEnable() {
@@ -41,13 +47,14 @@ class ParcelsPlugin : JavaPlugin() {
     }
 
     override fun onDisable() {
+        worktimeLimiter.completeAllTasks()
         cmdDispatcher?.unregisterFromCommandMap()
     }
 
     private fun init(): Boolean {
         optionsFile = File(dataFolder, "options.yml")
         options = Options()
-        worlds = Worlds(this)
+        parcelProvider = ParcelProviderImpl(this)
 
         try {
             if (!loadOptions()) return false
@@ -60,39 +67,46 @@ class ParcelsPlugin : JavaPlugin() {
                 return false
             }
 
-            worlds.loadWorlds(options)
+            globalAddedData = GlobalAddedDataManagerImpl(this)
+            entityTracker = ParcelEntityTracker(parcelProvider)
         } catch (ex: Exception) {
             plogger.error("Error loading options", ex)
             return false
         }
 
-        entityTracker = ParcelEntityTracker(worlds)
         registerListeners()
         registerCommands()
 
+        parcelProvider.loadWorlds()
         return true
     }
 
     fun loadOptions(): Boolean {
-        if (optionsFile.exists()) {
-            yamlObjectMapper.readerForUpdating(options).readValue<Options>(optionsFile)
-        } else if (optionsFile.tryCreate()) {
-            options.addWorld("parcels", WorldOptions())
-            try {
-                yamlObjectMapper.writeValue(optionsFile, options)
-            } catch (ex: Throwable) {
-                optionsFile.delete()
-                throw ex
+        when {
+            optionsFile.exists() -> yamlObjectMapper.readerForUpdating(options).readValue<Options>(optionsFile)
+            optionsFile.tryCreate() -> {
+                options.addWorld("parcels")
+                try {
+                    yamlObjectMapper.writeValue(optionsFile, options)
+                } catch (ex: Throwable) {
+                    optionsFile.delete()
+                    throw ex
+                }
+                plogger.warn("Created options file with a world template. Please review it before next start.")
+                return false
+            }
+            else -> {
+                plogger.error("Failed to save options file ${optionsFile.canonicalPath}")
+                return false
             }
-            plogger.warn("Created options file with a world template. Please review it before next start.")
-            return false
-        } else {
-            plogger.error("Failed to save options file ${optionsFile.canonicalPath}")
-            return false
         }
         return true
     }
 
+    override fun getDefaultWorldGenerator(worldName: String, generatorId: String?): ChunkGenerator? {
+        return parcelProvider.getWorldGenerator(worldName)
+    }
+
     private fun registerCommands() {
         cmdDispatcher = getParcelCommands(this).apply {
             registerToCommandMap("parcels:", EOverridePolicy.FALLBACK_ONLY)
@@ -100,8 +114,8 @@ class ParcelsPlugin : JavaPlugin() {
     }
 
     private fun registerListeners() {
-        if (listeners != null) {
-            listeners = ParcelListeners(worlds, entityTracker)
+        if (listeners == null) {
+            listeners = ParcelListeners(parcelProvider, entityTracker)
             registrator.registerListeners(listeners!!)
         }
     }

src/main/kotlin/io/dico/parcels2/WorldGenerator.kt

@@ -1,307 +0,0 @@
-package io.dico.parcels2
-
-import io.dico.parcels2.blockvisitor.Worker
-import io.dico.parcels2.blockvisitor.RegionTraversal
-import io.dico.parcels2.util.*
-import org.bukkit.*
-import org.bukkit.Bukkit.createBlockData
-import org.bukkit.block.Biome
-import org.bukkit.block.Block
-import org.bukkit.block.BlockFace
-import org.bukkit.block.Skull
-import org.bukkit.block.data.BlockData
-import org.bukkit.block.data.type.Sign
-import org.bukkit.block.data.type.Slab
-import org.bukkit.entity.Entity
-import org.bukkit.generator.BlockPopulator
-import org.bukkit.generator.ChunkGenerator
-import java.util.*
-import kotlin.coroutines.experimental.buildIterator
-import kotlin.reflect.KClass
-
-abstract class ParcelGenerator : ChunkGenerator(), ParcelProvider {
-    abstract val world: ParcelWorld
-
-    abstract val factory: GeneratorFactory
-
-    abstract override fun generateChunkData(world: World?, random: Random?, chunkX: Int, chunkZ: Int, biome: BiomeGrid?): ChunkData
-
-    abstract fun populate(world: World?, random: Random?, chunk: Chunk?)
-
-    abstract override fun getFixedSpawnLocation(world: World?, random: Random?): Location
-
-    override fun getDefaultPopulators(world: World?): MutableList<BlockPopulator> {
-        return Collections.singletonList(object : BlockPopulator() {
-            override fun populate(world: World?, random: Random?, chunk: Chunk?) {
-                this@ParcelGenerator.populate(world, random, chunk)
-            }
-        })
-    }
-
-    abstract fun updateOwner(parcel: Parcel)
-
-    abstract fun getBottomCoord(parcel: Parcel): Vec2i
-
-    abstract fun getHomeLocation(parcel: Parcel): Location
-
-    abstract fun setBiome(parcel: Parcel, biome: Biome)
-
-    abstract fun getEntities(parcel: Parcel): Collection<Entity>
-
-    abstract fun getBlocks(parcel: Parcel, yRange: IntRange = 0..255): Iterator<Block>
-
-    abstract fun clearParcel(parcel: Parcel): Worker
-
-    abstract fun doBlockOperation(parcel: Parcel, direction: RegionTraversal = RegionTraversal.DOWNWARD, operation: (Block) -> Unit): Worker
-
-}
-
-interface GeneratorFactory {
-    companion object GeneratorFactories {
-        private val map: MutableMap<String, GeneratorFactory> = HashMap()
-
-        fun registerFactory(generator: GeneratorFactory): Boolean = map.putIfAbsent(generator.name, generator) == null
-
-        fun getFactory(name: String): GeneratorFactory? = map.get(name)
-
-        init {
-            registerFactory(DefaultParcelGenerator.Factory)
-        }
-
-    }
-
-    val name: String
-
-    val optionsClass: KClass<out GeneratorOptions>
-
-    fun newParcelGenerator(worlds: Worlds, worldName: String, options: GeneratorOptions): ParcelGenerator
-
-}
-
-class DefaultParcelGenerator(val worlds: Worlds, val name: String, private val o: DefaultGeneratorOptions) : ParcelGenerator() {
-    override val world: ParcelWorld by lazy { worlds.getWorld(name)!! }
-    override val factory = Factory
-    val worktimeLimiter = worlds.plugin.worktimeLimiter
-    val maxHeight by lazy { world.world.maxHeight }
-    val airType = worlds.plugin.server.createBlockData(Material.AIR)
-
-    companion object Factory : GeneratorFactory {
-        override val name get() = "default"
-        override val optionsClass get() = DefaultGeneratorOptions::class
-        override fun newParcelGenerator(worlds: Worlds, worldName: String, options: GeneratorOptions): ParcelGenerator {
-            return DefaultParcelGenerator(worlds, worldName, options as DefaultGeneratorOptions)
-        }
-    }
-
-    val sectionSize = o.parcelSize + o.pathSize
-    val pathOffset = (if (o.pathSize % 2 == 0) o.pathSize + 2 else o.pathSize + 1) / 2
-    val makePathMain = o.pathSize > 2
-    val makePathAlt = o.pathSize > 4
-
-    private inline fun <T> generate(chunkX: Int,
-                                    chunkZ: Int,
-                                    floor: T, wall:
-                                    T, pathMain: T,
-                                    pathAlt: T,
-                                    fill: T,
-                                    setter: (Int, Int, Int, T) -> Unit) {
-
-        val floorHeight = o.floorHeight
-        val parcelSize = o.parcelSize
-        val sectionSize = sectionSize
-        val pathOffset = pathOffset
-        val makePathMain = makePathMain
-        val makePathAlt = makePathAlt
-
-        // parcel bottom x and z
-        // umod is unsigned %: the result is always >= 0
-        val pbx = ((chunkX shl 4) - o.offsetX) umod sectionSize
-        val pbz = ((chunkZ shl 4) - o.offsetZ) umod sectionSize
-
-        var curHeight: Int
-        var x: Int
-        var z: Int
-        for (cx in 0..15) {
-            for (cz in 0..15) {
-                x = (pbx + cx) % sectionSize - pathOffset
-                z = (pbz + cz) % sectionSize - pathOffset
-                curHeight = floorHeight
-
-                val type = when {
-                    (x in 0 until parcelSize && z in 0 until parcelSize) -> floor
-                    (x in -1..parcelSize && z in -1..parcelSize) -> {
-                        curHeight++
-                        wall
-                    }
-                    (makePathAlt && x in -2 until parcelSize + 2 && z in -2 until parcelSize + 2) -> pathAlt
-                    (makePathMain) -> pathMain
-                    else -> {
-                        curHeight++
-                        wall
-                    }
-                }
-
-                for (y in 0 until curHeight) {
-                    setter(cx, y, cz, fill)
-                }
-                setter(cx, curHeight, cz, type)
-            }
-        }
-    }
-
-    override fun generateChunkData(world: World?, random: Random?, chunkX: Int, chunkZ: Int, biome: BiomeGrid?): ChunkData {
-        val out = Bukkit.createChunkData(world)
-        generate(chunkX, chunkZ, o.floorType, o.wallType, o.pathMainType, o.pathAltType, o.fillType) { x, y, z, type ->
-            out.setBlock(x, y, z, type)
-        }
-        return out
-    }
-
-
-    override fun populate(world: World?, random: Random?, chunk: Chunk?) {
-        /*
-        generate(chunk!!.x, chunk.z, o.floorType.data, o.wallType.data, o.pathMainType.data, o.pathAltType.data, o.fillType.data) { x, y, z, type ->
-            if (type == 0.toByte()) chunk.getBlock(x, y, z).setData(type, false)
-        }
-        */
-    }
-
-    override fun getFixedSpawnLocation(world: World?, random: Random?): Location {
-        val fix = if (o.parcelSize.even) 0.5 else 0.0
-        return Location(world, o.offsetX + fix, o.floorHeight + 1.0, o.offsetZ + fix)
-    }
-
-    override fun parcelAt(x: Int, z: Int): Parcel? {
-        val sectionSize = sectionSize
-        val parcelSize = o.parcelSize
-        val absX = x - o.offsetX - pathOffset
-        val absZ = z - o.offsetZ - pathOffset
-        val modX = absX umod sectionSize
-        val modZ = absZ umod sectionSize
-        if (0 <= modX && modX < parcelSize && 0 <= modZ && modZ < parcelSize) {
-            return world.parcelByID((absX - modX) / sectionSize, (absZ - modZ) / sectionSize)
-        }
-        return null
-    }
-
-    override fun getBottomCoord(parcel: Parcel): Vec2i = Vec2i(sectionSize * parcel.pos.x + pathOffset + o.offsetX,
-        sectionSize * parcel.pos.z + pathOffset + o.offsetZ)
-
-    override fun getHomeLocation(parcel: Parcel): Location {
-        val bottom = getBottomCoord(parcel)
-        return Location(world.world, bottom.x.toDouble(), o.floorHeight + 1.0, bottom.z + (o.parcelSize - 1) / 2.0, -90F, 0F)
-    }
-
-    override fun updateOwner(parcel: Parcel) {
-        val world = this.world.world
-        val b = getBottomCoord(parcel)
-
-        val wallBlock = world.getBlockAt(b.x - 1, o.floorHeight + 1, b.z - 1)
-        val signBlock = world.getBlockAt(b.x - 2, o.floorHeight + 1, b.z - 1)
-        val skullBlock = world.getBlockAt(b.x - 1, o.floorHeight + 2, b.z - 1)
-
-        val owner = parcel.owner
-        if (owner == null) {
-            wallBlock.blockData = o.wallType
-            signBlock.type = Material.AIR
-            skullBlock.type = Material.AIR
-        } else {
-
-            val wallBlockType: BlockData = if (o.wallType is Slab)
-                (o.wallType.clone() as Slab).apply { type = Slab.Type.DOUBLE }
-            else
-                o.wallType
-
-            wallBlock.blockData = wallBlockType
-
-            signBlock.blockData = (createBlockData(Material.WALL_SIGN) as Sign).apply { rotation = BlockFace.NORTH }
-
-            val sign = signBlock.state as org.bukkit.block.Sign
-            sign.setLine(0, parcel.id)
-            sign.setLine(2, owner.playerName)
-            sign.update()
-
-            skullBlock.type = Material.PLAYER_HEAD
-            val skull = skullBlock.state as Skull
-            if (owner.uuid != null) {
-                skull.owningPlayer = owner.offlinePlayer
-            } else {
-                skull.owner = owner.name
-            }
-            skull.rotation = BlockFace.WEST
-            skull.update()
-        }
-    }
-
-    override fun setBiome(parcel: Parcel, biome: Biome) {
-        val world = this.world.world
-        val b = getBottomCoord(parcel)
-        val parcelSize = o.parcelSize
-        for (x in b.x until b.x + parcelSize) {
-            for (z in b.z until b.z + parcelSize) {
-                world.setBiome(x, z, biome)
-            }
-        }
-    }
-
-    override fun getEntities(parcel: Parcel): Collection<Entity> {
-        val world = this.world.world
-        val b = getBottomCoord(parcel)
-        val parcelSize = o.parcelSize
-        val center = Location(world, (b.x + parcelSize) / 2.0, 128.0, (b.z + parcelSize) / 2.0)
-        return world.getNearbyEntities(center, parcelSize / 2.0 + 0.2, 128.0, parcelSize / 2.0 + 0.2)
-    }
-
-    override fun getBlocks(parcel: Parcel, yRange: IntRange): Iterator<Block> = buildIterator {
-        val range = yRange.clamp(0, 255)
-        val world = this@DefaultParcelGenerator.world.world
-        val b = getBottomCoord(parcel)
-        val parcelSize = o.parcelSize
-        for (x in b.x until b.x + parcelSize) {
-            for (z in b.z until b.z + parcelSize) {
-                for (y in range) {
-                    yield(world.getBlockAt(x, y, z))
-                }
-            }
-        }
-    }
-
-    override fun clearParcel(parcel: Parcel) = worktimeLimiter.submit {
-        val bottom = getBottomCoord(parcel)
-        val region = Region(Vec3i(bottom.x, 0, bottom.z), Vec3i(o.parcelSize, maxHeight + 1, o.parcelSize))
-        val blocks = RegionTraversal.DOWNWARD.regionTraverser(region)
-        val blockCount = region.blockCount.toDouble()
-
-        val world = world.world
-        val floorHeight = o.floorHeight
-        val airType = airType; val floorType = o.floorType; val fillType = o.fillType
-
-        for ((index, vec) in blocks.withIndex()) {
-            markSuspensionPoint()
-            val y = vec.y
-            val blockType = when {
-                y > floorHeight -> airType
-                y == floorHeight -> floorType
-                else -> fillType
-            }
-            world[vec].blockData = blockType
-            setProgress((index + 1) / blockCount)
-        }
-
-    }
-
-    override fun doBlockOperation(parcel: Parcel, direction: RegionTraversal, operation: (Block) -> Unit) = worktimeLimiter.submit {
-        val bottom = getBottomCoord(parcel)
-        val region = Region(Vec3i(bottom.x, 0, bottom.z), Vec3i(o.parcelSize, maxHeight + 1, o.parcelSize))
-        val blocks = direction.regionTraverser(region)
-        val blockCount = region.blockCount.toDouble()
-        val world = world.world
-
-        for ((index, vec) in blocks.withIndex()) {
-            markSuspensionPoint()
-            operation(world[vec])
-            setProgress((index + 1) / blockCount)
-        }
-    }
-
-}

src/main/kotlin/io/dico/parcels2/blockvisitor/Attachables.kt

@@ -2,7 +2,7 @@ package io.dico.parcels2.blockvisitor
 
 import org.bukkit.Material
 import org.bukkit.Material.*
-import java.util.*
+import java.util.EnumSet
 
 val attachables: Set<Material> = EnumSet.of(
     ACACIA_DOOR,
@@ -64,4 +64,4 @@ val attachables: Set<Material> = EnumSet.of(
     WALL_SIGN,
     LILY_PAD,
     DANDELION
-);
+)

src/main/kotlin/io/dico/parcels2/blockvisitor/RegionTraversal.kt

@@ -20,7 +20,7 @@ enum class RegionTraversal(private val builder: suspend SequenceBuilder<Vec3i>.(
 
     }),
 
-    UPDARD({ region ->
+    UPWARD({ region ->
         val origin = region.origin
         val size = region.size
 

src/main/kotlin/io/dico/parcels2/blockvisitor/Schematic.kt

@@ -6,6 +6,7 @@ import io.dico.parcels2.util.get
 import org.bukkit.World
 import org.bukkit.block.data.BlockData
 
+// TODO order paste such that attachables are placed after the block they depend on
 class Schematic {
     val size: Vec3i get() = _size!!
     private var _size: Vec3i? = null

src/main/kotlin/io/dico/parcels2/blockvisitor/WorktimeLimiter.kt

@@ -1,11 +1,12 @@
 package io.dico.parcels2.blockvisitor
 
-import kotlinx.coroutines.experimental.*
-import org.bukkit.plugin.Plugin
+import io.dico.parcels2.ParcelsPlugin
+import io.dico.parcels2.util.FunctionHelper
+import kotlinx.coroutines.experimental.CancellationException
+import kotlinx.coroutines.experimental.Job
 import org.bukkit.scheduler.BukkitTask
 import java.lang.System.currentTimeMillis
-import java.util.*
-import java.util.concurrent.Executor
+import java.util.LinkedList
 import java.util.logging.Level
 import kotlin.coroutines.experimental.Continuation
 import kotlin.coroutines.experimental.intrinsics.COROUTINE_SUSPENDED
@@ -27,6 +28,11 @@ sealed class WorktimeLimiter {
      * Get a list of all workers
      */
     abstract val workers: List<Worker>
+
+    /**
+     * Attempts to complete any remaining tasks immediately, without suspension.
+     */
+    abstract fun completeAllTasks()
 }
 
 interface Timed {
@@ -90,8 +96,14 @@ interface WorkerScope : Timed {
 
 private interface WorkerContinuation : Worker, WorkerScope {
     /**
-     * Start or resume the execution of this worker
-     * returns true if the worker completed
+     * Start or resumes the execution of this worker
+     * and returns true if the worker completed
+     *
+     * [worktime] is the maximum amount of time, in milliseconds,
+     * that this job may run for until suspension.
+     *
+     * If [worktime] is not positive, the worker will complete
+     * without suspension and this method will always return true.
      */
     fun resume(worktime: Long): Boolean
 }
@@ -101,19 +113,17 @@ private interface WorkerContinuation : Worker, WorkerScope {
  * There is a configurable maxiumum amount of milliseconds that can be allocated to all workers together in each server tick
  * This object attempts to split that maximum amount of milliseconds equally between all jobs
  */
-class TickWorktimeLimiter(private val plugin: Plugin, var options: TickWorktimeOptions) : WorktimeLimiter() {
-    // Coroutine dispatcher for jobs
-    private val dispatcher = Executor(Runnable::run).asCoroutineDispatcher()
+class TickWorktimeLimiter(private val plugin: ParcelsPlugin, var options: TickWorktimeOptions) : WorktimeLimiter() {
     // The currently registered bukkit scheduler task
     private var bukkitTask: BukkitTask? = null
     // The workers.
-    private var _workers = LinkedList<WorkerContinuation>()
+    private val _workers = LinkedList<WorkerContinuation>()
     override val workers: List<Worker> = _workers
 
     override fun submit(task: TimeLimitedTask): Worker {
-        val worker: WorkerContinuation = WorkerImpl(plugin, dispatcher, task)
+        val worker: WorkerContinuation = WorkerImpl(plugin.functionHelper, task)
         _workers.addFirst(worker)
-        if (bukkitTask == null) bukkitTask = plugin.server.scheduler.runTaskTimer(plugin, ::tickJobs, 0, options.tickInterval.toLong())
+        if (bukkitTask == null) bukkitTask = plugin.functionHelper.scheduleRepeating(0, options.tickInterval) { tickJobs() }
         return worker
     }
 
@@ -144,10 +154,18 @@ class TickWorktimeLimiter(private val plugin: Plugin, var options: TickWorktimeO
         }
     }
 
+    override fun completeAllTasks() {
+        _workers.forEach {
+            it.resume(-1)
+        }
+        _workers.clear()
+        bukkitTask?.cancel()
+        bukkitTask = null
+    }
+
 }
 
-private class WorkerImpl(val plugin: Plugin,
-                         val dispatcher: CoroutineDispatcher,
+private class WorkerImpl(val functionHelper: FunctionHelper,
                          val task: TimeLimitedTask) : WorkerContinuation {
     override var job: Job? = null; private set
 
@@ -170,6 +188,7 @@ private class WorkerImpl(val plugin: Plugin,
     private var onCompleted: WorkerUpdateLister? = null
     private var continuation: Continuation<Unit>? = null
     private var nextSuspensionTime: Long = 0L
+    private var completeForcefully = false
 
     private fun initJob(job: Job) {
         this.job?.let { throw IllegalStateException() }
@@ -179,7 +198,7 @@ private class WorkerImpl(val plugin: Plugin,
             // report any error that occurred
             completionException = exception?.also {
                 if (it !is CancellationException)
-                    plugin.logger.log(Level.SEVERE, "TimeLimitedTask for plugin ${plugin.name} generated an exception", it)
+                    functionHelper.plugin.logger.log(Level.SEVERE, "TimeLimitedTask for plugin ${functionHelper.plugin.name} generated an exception", it)
             }
 
             // convert to elapsed time here
@@ -204,7 +223,7 @@ private class WorkerImpl(val plugin: Plugin,
     }
 
     override suspend fun markSuspensionPoint() {
-        if (System.currentTimeMillis() >= nextSuspensionTime)
+        if (System.currentTimeMillis() >= nextSuspensionTime && !completeForcefully)
             suspendCoroutineUninterceptedOrReturn { cont: Continuation<Unit> ->
                 continuation = cont
                 COROUTINE_SUSPENDED
@@ -222,7 +241,11 @@ private class WorkerImpl(val plugin: Plugin,
     }
 
     override fun resume(worktime: Long): Boolean {
-        nextSuspensionTime = currentTimeMillis() + worktime
+        if (worktime > 0) {
+            nextSuspensionTime = currentTimeMillis() + worktime
+        } else {
+            completeForcefully = true
+        }
 
         continuation?.let {
             continuation = null
@@ -236,10 +259,9 @@ private class WorkerImpl(val plugin: Plugin,
         }
 
         try {
-            launch(context = dispatcher, start = CoroutineStart.UNDISPATCHED) {
-                initJob(job = kotlin.coroutines.experimental.coroutineContext[Job]!!)
-                task()
-            }
+            val job = functionHelper.launchLazilyOnMainThread { task() }
+            initJob(job = job)
+            job.start()
         } catch (t: Throwable) {
             // do nothing: handled by job.invokeOnCompletion()
         }

src/main/kotlin/io/dico/parcels2/command/AbstractParcelCommands.kt

@@ -4,10 +4,10 @@ import io.dico.dicore.command.CommandException
 import io.dico.dicore.command.ExecutionContext
 import io.dico.dicore.command.ICommandReceiver
 import io.dico.parcels2.ParcelOwner
+import io.dico.parcels2.ParcelWorld
 import io.dico.parcels2.ParcelsPlugin
 import io.dico.parcels2.util.hasAdminManage
 import io.dico.parcels2.util.parcelLimit
-import io.dico.parcels2.util.uuid
 import org.bukkit.entity.Player
 import org.bukkit.plugin.Plugin
 import java.lang.reflect.Method
@@ -16,10 +16,10 @@ abstract class AbstractParcelCommands(val plugin: ParcelsPlugin) : ICommandRecei
 
     override fun getPlugin(): Plugin = plugin
     override fun getReceiver(context: ExecutionContext, target: Method, cmdName: String): ICommandReceiver {
-        return getParcelCommandReceiver(plugin.worlds, context, target, cmdName)
+        return getParcelCommandReceiver(plugin.parcelProvider, context, target, cmdName)
     }
 
-    protected inline val worlds get() = plugin.worlds
+    protected inline val worlds get() = plugin.parcelProvider
 
     protected fun error(message: String): Nothing {
         throw CommandException(message)
@@ -29,9 +29,10 @@ abstract class AbstractParcelCommands(val plugin: ParcelsPlugin) : ICommandRecei
         if (!plugin.storage.isConnected) error("Parcels cannot $action right now because of a database error")
     }
 
-    protected suspend fun checkParcelLimit(player: Player) {
+    protected suspend fun checkParcelLimit(player: Player, world: ParcelWorld) {
         if (player.hasAdminManage) return
-        val numOwnedParcels = plugin.storage.getNumParcels(ParcelOwner(uuid = player.uuid)).await()
+        val numOwnedParcels = plugin.storage.getOwnedParcels(ParcelOwner(player)).await()
+            .filter { it.worldId.equals(world.id) }.size
 
         val limit = player.parcelLimit
         if (numOwnedParcels >= limit) {

src/main/kotlin/io/dico/parcels2/command/CommandsAddedStatusGlobal.kt

@@ -0,0 +1,65 @@
+package io.dico.parcels2.command
+
+import io.dico.dicore.command.Validate
+import io.dico.dicore.command.annotation.Cmd
+import io.dico.dicore.command.annotation.Desc
+import io.dico.parcels2.GlobalAddedData
+import io.dico.parcels2.GlobalAddedDataManager
+import io.dico.parcels2.ParcelOwner
+import io.dico.parcels2.ParcelsPlugin
+import org.bukkit.OfflinePlayer
+import org.bukkit.entity.Player
+
+class CommandsAddedStatusGlobal(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
+    private inline val data get() = plugin.globalAddedData
+    @Suppress("NOTHING_TO_INLINE")
+    private inline operator fun GlobalAddedDataManager.get(player: OfflinePlayer): GlobalAddedData = data[ParcelOwner(player)]
+
+    @Cmd("allow", aliases = ["add", "permit"])
+    @Desc("Globally allows a player to build on all",
+        "the parcels that you own.",
+        shortVersion = "globally allows a player to build on your parcels")
+    @ParcelRequire(owner = true)
+    fun cmdAllow(sender: Player, player: OfflinePlayer): Any? {
+        Validate.isTrue(player != sender, "The target cannot be yourself")
+        Validate.isTrue(data[sender].allow(player), "${player.name} is already allowed globally")
+        return "${player.name} is now allowed to build on all your parcels"
+    }
+
+    @Cmd("disallow", aliases = ["remove", "forbid"])
+    @Desc("Globally disallows a player to build on",
+        "the parcels that you own.",
+        "If the player is allowed to build on specific",
+        "parcels, they can still build there.",
+        shortVersion = "globally disallows a player to build on your parcels")
+    @ParcelRequire(owner = true)
+    fun cmdDisallow(sender: Player, player: OfflinePlayer): Any? {
+        Validate.isTrue(player != sender, "The target cannot be yourself")
+        Validate.isTrue(data[sender].disallow(player), "${player.name} is not currently allowed globally")
+        return "${player.name} is not allowed to build on all your parcels anymore"
+    }
+
+    @Cmd("ban", aliases = ["deny"])
+    @Desc("Globally bans a player from all the parcels",
+        "that you own, making them unable to enter.",
+        shortVersion = "globally bans a player from your parcels")
+    @ParcelRequire(owner = true)
+    fun cmdBan(sender: Player, player: OfflinePlayer): Any? {
+        Validate.isTrue(player != sender, "The target cannot be yourself")
+        Validate.isTrue(data[sender].ban(player), "${player.name} is already banned from all your parcels")
+        return "${player.name} is now banned from all your parcels"
+    }
+
+    @Cmd("unban", aliases = ["undeny"])
+    @Desc("Globally unbans a player from all the parcels",
+        "that you own, they can enter again.",
+        "If the player is banned from specific parcels,",
+        "they will still be banned there.",
+        shortVersion = "globally unbans a player from your parcels")
+    @ParcelRequire(owner = true)
+    fun cmdUnban(sender: Player, player: OfflinePlayer): Any? {
+        Validate.isTrue(data[sender].unban(player), "${player.name} is not currently banned from all your parcels")
+        return "${player.name} is not banned from all your parcels anymore"
+    }
+
+}

src/main/kotlin/io/dico/parcels2/command/CommandsAddedStatusLocal.kt

@@ -8,14 +8,14 @@ import io.dico.parcels2.util.hasAdminManage
 import org.bukkit.OfflinePlayer
 import org.bukkit.entity.Player
 
-class CommandsAddedStatus(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
+class CommandsAddedStatusLocal(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
 
     @Cmd("allow", aliases = ["add", "permit"])
     @Desc("Allows a player to build on this parcel",
         shortVersion = "allows a player to build on this parcel")
     @ParcelRequire(owner = true)
     fun ParcelScope.cmdAllow(sender: Player, player: OfflinePlayer): Any? {
-        Validate.isTrue(parcel.owner != null && !sender.hasAdminManage, "This parcel is unowned")
+        Validate.isTrue(parcel.owner != null || sender.hasAdminManage, "This parcel is unowned")
         Validate.isTrue(!parcel.owner!!.matches(player), "The target already owns the parcel")
         Validate.isTrue(parcel.allow(player), "${player.name} is already allowed to build on this parcel")
         return "${player.name} is now allowed to build on this parcel"
@@ -37,7 +37,7 @@ class CommandsAddedStatus(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin
         shortVersion = "bans a player from this parcel")
     @ParcelRequire(owner = true)
     fun ParcelScope.cmdBan(sender: Player, player: OfflinePlayer): Any? {
-        Validate.isTrue(parcel.owner != null && !sender.hasAdminManage, "This parcel is unowned")
+        Validate.isTrue(parcel.owner != null || sender.hasAdminManage, "This parcel is unowned")
         Validate.isTrue(!parcel.owner!!.matches(player), "The owner cannot be banned from the parcel")
         Validate.isTrue(parcel.ban(player), "${player.name} is already banned from this parcel")
         return "${player.name} is now banned from this parcel"

src/main/kotlin/io/dico/parcels2/command/CommandsDebug.kt

@@ -1,12 +1,17 @@
 package io.dico.parcels2.command
 
 import io.dico.dicore.command.CommandException
+import io.dico.dicore.command.EMessageType
+import io.dico.dicore.command.ExecutionContext
 import io.dico.dicore.command.annotation.Cmd
 import io.dico.parcels2.ParcelsPlugin
+import io.dico.parcels2.blockvisitor.RegionTraversal
 import org.bukkit.Bukkit
+import org.bukkit.Material
 import org.bukkit.entity.Player
+import java.util.Random
 
-class CommandsDebug(val plugin: ParcelsPlugin) {
+class CommandsDebug(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
 
     @Cmd("reloadoptions")
     fun reloadOptions() {
@@ -23,4 +28,24 @@ class CommandsDebug(val plugin: ParcelsPlugin) {
         return "Teleported you to $worldName spawn"
     }
 
+    @Cmd("make_mess")
+    @ParcelRequire(owner = true)
+    fun ParcelScope.cmdMakeMess(context: ExecutionContext) {
+        val server = plugin.server
+        val blockDatas = arrayOf(
+            server.createBlockData(Material.STICKY_PISTON),
+            server.createBlockData(Material.GLASS),
+            server.createBlockData(Material.STONE_SLAB),
+            server.createBlockData(Material.QUARTZ_BLOCK)
+        )
+        val random = Random()
+
+        world.doBlockOperation(parcel.id, direction = RegionTraversal.UPWARD) { block ->
+            block.blockData = blockDatas[random.nextInt(4)]
+        }.onProgressUpdate(1000, 1000) { progress, elapsedTime ->
+            context.sendMessage(EMessageType.INFORMATIVE, "Mess progress: %.02f%%, %.2fs elapsed"
+                .format(progress * 100, elapsedTime / 1000.0))
+        }
+    }
+
 }

src/main/kotlin/io/dico/parcels2/command/CommandsGeneral.kt

@@ -4,20 +4,15 @@ import io.dico.dicore.command.EMessageType
 import io.dico.dicore.command.ExecutionContext
 import io.dico.dicore.command.annotation.Cmd
 import io.dico.dicore.command.annotation.Desc
+import io.dico.dicore.command.annotation.Flag
 import io.dico.dicore.command.annotation.RequireParameters
 import io.dico.parcels2.ParcelOwner
 import io.dico.parcels2.ParcelsPlugin
-import io.dico.parcels2.blockvisitor.RegionTraversal
-import io.dico.parcels2.command.NamedParcelDefaultValue.FIRST_OWNED
-import io.dico.parcels2.storage.getParcelBySerializedValue
 import io.dico.parcels2.util.hasAdminManage
 import io.dico.parcels2.util.hasParcelHomeOthers
 import io.dico.parcels2.util.uuid
-import org.bukkit.Material
 import org.bukkit.entity.Player
-import java.util.*
 
-//@Suppress("unused")
 class CommandsGeneral(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
 
     @Cmd("auto")
@@ -26,12 +21,12 @@ class CommandsGeneral(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
         shortVersion = "sets you up with a fresh, unclaimed parcel")
     suspend fun WorldScope.cmdAuto(player: Player): Any? {
         checkConnected("be claimed")
-        checkParcelLimit(player)
+        checkParcelLimit(player, world)
 
         val parcel = world.nextEmptyParcel()
             ?: error("This world is full, please ask an admin to upsize it")
         parcel.owner = ParcelOwner(uuid = player.uuid)
-        player.teleport(parcel.homeLocation)
+        player.teleport(parcel.world.getHomeLocation(parcel.id))
         return "Enjoy your new parcel!"
     }
 
@@ -48,23 +43,22 @@ class CommandsGeneral(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
         "more than one parcel",
         shortVersion = "teleports you to parcels")
     @RequireParameters(0)
-    suspend fun cmdHome(player: Player,
-                        @NamedParcelDefault(FIRST_OWNED) target: NamedParcelTarget): Any? {
-        if (player !== target.player && !player.hasParcelHomeOthers) {
+    suspend fun cmdHome(player: Player, @ParcelTarget.Kind(ParcelTarget.OWNER_REAL) target: ParcelTarget): Any? {
+        val ownerTarget = target as ParcelTarget.ByOwner
+        if (!ownerTarget.owner.matches(player) && !player.hasParcelHomeOthers) {
             error("You do not have permission to teleport to other people's parcels")
         }
 
-        val ownedParcelsResult = plugin.storage.getOwnedParcels(ParcelOwner(uuid = target.player.uuid)).await()
+        val ownedParcelsResult = plugin.storage.getOwnedParcels(ownerTarget.owner).await()
 
-        val uuid = target.player.uuid
         val ownedParcels = ownedParcelsResult
-            .map { worlds.getParcelBySerializedValue(it) }
-            .filter { it != null && it.world == target.world && it.owner?.uuid == uuid }
+            .map { worlds.getParcelById(it) }
+            .filter { it != null && ownerTarget.world == it.world }
 
         val targetMatch = ownedParcels.getOrNull(target.index)
             ?: error("The specified parcel could not be matched")
 
-        player.teleport(targetMatch.homeLocation)
+        player.teleport(targetMatch.world.getHomeLocation(targetMatch.id))
         return ""
     }
 
@@ -77,38 +71,39 @@ class CommandsGeneral(plugin: ParcelsPlugin) : AbstractParcelCommands(plugin) {
             error(if (it.matches(player)) "You already own this parcel" else "This parcel is not available")
         }
 
-        checkParcelLimit(player)
-        parcel.owner = ParcelOwner(uuid = player.uuid, name = player.name)
+        checkParcelLimit(player, world)
+        parcel.owner = ParcelOwner(player)
         return "Enjoy your new parcel!"
     }
 
+    @Cmd("unclaim")
+    @Desc("Unclaims this parcel")
+    @ParcelRequire(owner = true)
+    fun ParcelScope.cmdUnclaim(player: Player): Any? {
+        parcel.dispose()
+        return "Your parcel has been disposed"
+    }
+
     @Cmd("clear")
     @ParcelRequire(owner = true)
-    fun ParcelScope.cmdClear(context: ExecutionContext) {
-        world.generator.clearParcel(parcel)
+    fun ParcelScope.cmdClear(context: ExecutionContext, @Flag sure: Boolean): Any? {
+        if (!sure) return "Are you sure? You cannot undo this action!\n" +
+            "Run \"/${context.rawInput} -sure\" if you want to go through with this."
+
+        world.clearParcel(parcel.id)
             .onProgressUpdate(1000, 1000) { progress, elapsedTime ->
-                context.sendMessage(EMessageType.INFORMATIVE, "Clear progress: %.02f%%, %.2fs elapsed"
+                val alt = context.getFormat(EMessageType.NUMBER)
+                val main = context.getFormat(EMessageType.INFORMATIVE)
+                context.sendMessage(EMessageType.INFORMATIVE, false, "Clear progress: $alt%.02f$main%%, $alt%.2f${main}s elapsed"
                     .format(progress * 100, elapsedTime / 1000.0))
             }
+
+        return null
     }
 
-    @Cmd("make_mess")
-    @ParcelRequire(owner = true)
-    fun ParcelScope.cmdMakeMess(context: ExecutionContext) {
-        val server = plugin.server
-        val blockDatas = arrayOf(
-            server.createBlockData(Material.STICKY_PISTON),
-            server.createBlockData(Material.GLASS),
-            server.createBlockData(Material.STONE_SLAB),
-            server.createBlockData(Material.QUARTZ_BLOCK)
-        )
-        val random = Random()
-        world.generator.doBlockOperation(parcel, direction = RegionTraversal.UPDARD) { block ->
-            block.blockData = blockDatas[random.nextInt(4)]
-        }.onProgressUpdate(1000, 1000) { progress, elapsedTime ->
-            context.sendMessage(EMessageType.INFORMATIVE, "Mess progress: %.02f%%, %.2fs elapsed"
-                .format(progress * 100, elapsedTime / 1000.0))
-        }
+    @Cmd("swap")
+    fun ParcelScope.cmdSwap(context: ExecutionContext, @Flag sure: Boolean): Any? {
+        TODO()
     }
 
 }

src/main/kotlin/io/dico/parcels2/command/ParcelCommandBuilder.kt

@@ -3,29 +3,32 @@ package io.dico.parcels2.command
 import io.dico.dicore.command.CommandBuilder
 import io.dico.dicore.command.ICommandAddress
 import io.dico.dicore.command.ICommandDispatcher
-import io.dico.dicore.command.predef.PredefinedCommand
 import io.dico.dicore.command.registration.reflect.ReflectiveRegistration
 import io.dico.parcels2.ParcelsPlugin
-import io.dico.parcels2.logger
-import java.util.*
+import java.util.LinkedList
+import java.util.Queue
 
 @Suppress("UsePropertyAccessSyntax")
 fun getParcelCommands(plugin: ParcelsPlugin): ICommandDispatcher {
     //@formatter:off
     return CommandBuilder()
         .setChatController(ParcelsChatController())
-        .addParameterType(false, ParcelParameterType(plugin.worlds))
-        .addParameterType(true, ParcelHomeParameterType(plugin.worlds))
+        .addParameterType(false, ParcelParameterType(plugin.parcelProvider))
+        .addParameterType(true, ParcelTarget.PType(plugin.parcelProvider))
 
         .group("parcel", "plot", "plots", "p")
             .registerCommands(CommandsGeneral(plugin))
-            .registerCommands(CommandsAddedStatus(plugin))
+            .registerCommands(CommandsAddedStatusLocal(plugin))
 
-            .group("option")
+            .group("option", "opt", "o")
                 //.apply { CommandsParcelOptions.setGroupDescription(this) }
                 .registerCommands(CommandsParcelOptions(plugin))
                 .parent()
 
+            .group("global", "g")
+                .registerCommands(CommandsAddedStatusGlobal(plugin))
+                .parent()
+
             .group("admin", "a")
                 .registerCommands(CommandsAdmin(plugin))
                 .parent()

src/main/kotlin/io/dico/parcels2/command/ParcelCommandReceivers.kt

@@ -5,8 +5,8 @@ import io.dico.dicore.command.ExecutionContext
 import io.dico.dicore.command.ICommandReceiver
 import io.dico.dicore.command.Validate
 import io.dico.parcels2.Parcel
+import io.dico.parcels2.ParcelProvider
 import io.dico.parcels2.ParcelWorld
-import io.dico.parcels2.Worlds
 import io.dico.parcels2.util.hasAdminManage
 import io.dico.parcels2.util.uuid
 import org.bukkit.entity.Player
@@ -30,7 +30,7 @@ open class ParcelScope(val parcel: Parcel) : WorldScope(parcel.world) {
         "You must own this parcel to $action")
 }
 
-fun getParcelCommandReceiver(worlds: Worlds, context: ExecutionContext, method: Method, cmdName: String): ICommandReceiver {
+fun getParcelCommandReceiver(parcelProvider: ParcelProvider, context: ExecutionContext, method: Method, cmdName: String): ICommandReceiver {
     val player = context.sender as Player
     val function = method.kotlinFunction!!
     val receiverType = function.extensionReceiverParameter!!.type
@@ -39,20 +39,20 @@ fun getParcelCommandReceiver(worlds: Worlds, context: ExecutionContext, method:
     val owner = require?.owner == true
 
     return when (receiverType.jvmErasure) {
-        ParcelScope::class -> ParcelScope(worlds.getParcelRequired(player, admin, owner))
-        WorldScope::class -> WorldScope(worlds.getWorldRequired(player, admin))
+        ParcelScope::class -> ParcelScope(parcelProvider.getParcelRequired(player, admin, owner))
+        WorldScope::class -> WorldScope(parcelProvider.getWorldRequired(player, admin))
         else -> throw InternalError("Invalid command receiver type")
     }
 }
 
-fun Worlds.getWorldRequired(player: Player, admin: Boolean = false): ParcelWorld {
+fun ParcelProvider.getWorldRequired(player: Player, admin: Boolean = false): ParcelWorld {
     if (admin) Validate.isTrue(player.hasAdminManage, "You must have admin rights to use that command")
     return getWorld(player.world)
         ?: throw CommandException("You must be in a parcel world to use that command")
 }
 
-fun Worlds.getParcelRequired(player: Player, admin: Boolean = false, own: Boolean = false): Parcel {
-    val parcel = getWorldRequired(player, admin = admin).parcelAt(player)
+fun ParcelProvider.getParcelRequired(player: Player, admin: Boolean = false, own: Boolean = false): Parcel {
+    val parcel = getWorldRequired(player, admin = admin).getParcelAt(player)
         ?: throw CommandException("You must be in a parcel to use that command")
     if (own) Validate.isTrue(parcel.isOwner(player.uuid) || player.hasAdminManage,
         "You must own this parcel to use that command")

src/main/kotlin/io/dico/parcels2/command/ParcelParameterTypes.kt

@@ -3,14 +3,10 @@ package io.dico.parcels2.command
 import io.dico.dicore.command.CommandException
 import io.dico.dicore.command.parameter.ArgumentBuffer
 import io.dico.dicore.command.parameter.Parameter
-import io.dico.dicore.command.parameter.type.ParameterConfig
 import io.dico.dicore.command.parameter.type.ParameterType
 import io.dico.parcels2.Parcel
+import io.dico.parcels2.ParcelProvider
 import io.dico.parcels2.ParcelWorld
-import io.dico.parcels2.Worlds
-import io.dico.parcels2.util.isValid
-import org.bukkit.Bukkit
-import org.bukkit.OfflinePlayer
 import org.bukkit.command.CommandSender
 import org.bukkit.entity.Player
 
@@ -18,7 +14,7 @@ fun invalidInput(parameter: Parameter<*, *>, message: String): Nothing {
     throw CommandException("invalid input for ${parameter.name}: $message")
 }
 
-fun Worlds.getTargetWorld(input: String?, sender: CommandSender, parameter: Parameter<*, *>): ParcelWorld {
+fun ParcelProvider.getTargetWorld(input: String?, sender: CommandSender, parameter: Parameter<*, *>): ParcelWorld {
     val worldName = input
         ?.takeUnless { it.isEmpty() }
         ?: (sender as? Player)?.world?.name
@@ -28,14 +24,14 @@ fun Worlds.getTargetWorld(input: String?, sender: CommandSender, parameter: Para
         ?: invalidInput(parameter, "$worldName is not a parcel world")
 }
 
-class ParcelParameterType(val worlds: Worlds) : ParameterType<Parcel, Void>(Parcel::class.java) {
+class ParcelParameterType(val parcelProvider: ParcelProvider) : ParameterType<Parcel, Void>(Parcel::class.java) {
     val regex = Regex.fromLiteral("((.+)->)?([0-9]+):([0-9]+)")
 
     override fun parse(parameter: Parameter<Parcel, Void>, sender: CommandSender, buffer: ArgumentBuffer): Parcel {
         val matchResult = regex.matchEntire(buffer.next())
             ?: invalidInput(parameter, "must match (w->)?a:b (/${regex.pattern}/)")
 
-        val world = worlds.getTargetWorld(matchResult.groupValues[2], sender, parameter)
+        val world = parcelProvider.getTargetWorld(matchResult.groupValues[2], sender, parameter)
 
         val x = matchResult.groupValues[3].toIntOrNull()
             ?: invalidInput(parameter, "couldn't parse int")
@@ -43,80 +39,8 @@ class ParcelParameterType(val worlds: Worlds) : ParameterType<Parcel, Void>(Parc
         val z = matchResult.groupValues[4].toIntOrNull()
             ?: invalidInput(parameter, "couldn't parse int")
 
-        return world.parcelByID(x, z)
+        return world.getParcelById(x, z)
             ?: invalidInput(parameter, "parcel id is out of range")
     }
 
 }
-
-
-class NamedParcelTarget(val world: ParcelWorld, val player: OfflinePlayer, val index: Int)
-
-@Target(AnnotationTarget.VALUE_PARAMETER)
-@Retention(AnnotationRetention.RUNTIME)
-annotation class NamedParcelDefault(val value: NamedParcelDefaultValue)
-
-enum class NamedParcelDefaultValue {
-    FIRST_OWNED,
-    NULL
-}
-
-class NamedParcelTargetConfig : ParameterConfig<NamedParcelDefault,
-    NamedParcelDefaultValue>(NamedParcelDefault::class.java) {
-
-    override fun toParameterInfo(annotation: NamedParcelDefault): NamedParcelDefaultValue {
-        return annotation.value
-    }
-}
-
-class ParcelHomeParameterType(val worlds: Worlds) : ParameterType<NamedParcelTarget,
-    NamedParcelDefaultValue>(NamedParcelTarget::class.java, NamedParcelTargetConfig()) {
-
-    val regex = Regex.fromLiteral("((.+)->)?(.+)|((.+):([0-9]+))")
-
-    private fun requirePlayer(sender: CommandSender, parameter: Parameter<*, *>): Player {
-        if (sender !is Player) invalidInput(parameter, "console cannot omit the player name")
-        return sender
-    }
-
-    @Suppress("UsePropertyAccessSyntax")
-    private fun getOfflinePlayer(input: String, parameter: Parameter<*, *>) = Bukkit.getOfflinePlayer(input)
-        ?.takeIf { it.isValid }
-        ?: invalidInput(parameter, "do not know who $input is")
-
-    override fun parse(parameter: Parameter<NamedParcelTarget, NamedParcelDefaultValue>,
-                       sender: CommandSender, buffer: ArgumentBuffer): NamedParcelTarget {
-        val matchResult = regex.matchEntire(buffer.next())
-            ?: invalidInput(parameter, "must be a player, index, or player:index (/${regex.pattern}/)")
-
-        val world = worlds.getTargetWorld(matchResult.groupValues[2], sender, parameter)
-
-        matchResult.groupValues[3].takeUnless { it.isEmpty() }?.let {
-            // first group was matched, it's a player or an int
-            it.toIntOrNull()?.let {
-                requirePlayer(sender, parameter)
-                return NamedParcelTarget(world, sender as Player, it)
-            }
-
-            return NamedParcelTarget(world, getOfflinePlayer(it, parameter), 0)
-        }
-
-        val player = getOfflinePlayer(matchResult.groupValues[5], parameter)
-        val index = matchResult.groupValues[6].toIntOrNull()
-            ?: invalidInput(parameter, "couldn't parse int")
-
-        return NamedParcelTarget(world, player, index)
-    }
-
-    override fun getDefaultValue(parameter: Parameter<NamedParcelTarget, NamedParcelDefaultValue>,
-                                 sender: CommandSender, buffer: ArgumentBuffer): NamedParcelTarget? {
-        if (parameter.paramInfo == NamedParcelDefaultValue.NULL) {
-            return null
-        }
-
-        val world = worlds.getTargetWorld(null, sender, parameter)
-        val player = requirePlayer(sender, parameter)
-        return NamedParcelTarget(world, player, 0)
-    }
-
-}

src/main/kotlin/io/dico/parcels2/command/ParcelTarget.kt

@@ -0,0 +1,162 @@
+package io.dico.parcels2.command
+
+import io.dico.dicore.command.parameter.ArgumentBuffer
+import io.dico.dicore.command.parameter.Parameter
+import io.dico.dicore.command.parameter.type.ParameterConfig
+import io.dico.dicore.command.parameter.type.ParameterType
+import io.dico.parcels2.*
+import io.dico.parcels2.util.Vec2i
+import io.dico.parcels2.util.floor
+import io.dico.parcels2.util.isValid
+import kotlinx.coroutines.experimental.Deferred
+import org.bukkit.Bukkit
+import org.bukkit.command.CommandSender
+import org.bukkit.entity.Player
+
+sealed class ParcelTarget(val world: ParcelWorld, val isDefault: Boolean) {
+    abstract suspend fun ParcelsPlugin.getParcelSuspend(): Parcel?
+    fun ParcelsPlugin.getParcelDeferred(): Deferred<Parcel?> = functionHelper.deferUndispatchedOnMainThread { getParcelSuspend() }
+
+    class ByID(world: ParcelWorld, val id: Vec2i?, isDefault: Boolean) : ParcelTarget(world, isDefault) {
+        override suspend fun ParcelsPlugin.getParcelSuspend(): Parcel? = getParcel()
+        fun getParcel() = id?.let { world.getParcelById(it) }
+        val isPath: Boolean get() = id == null
+    }
+
+    class ByOwner(world: ParcelWorld, val owner: ParcelOwner, val index: Int, isDefault: Boolean) : ParcelTarget(world, isDefault) {
+        init {
+            if (index < 0) throw IllegalArgumentException("Invalid parcel home index: $index")
+        }
+
+        override suspend fun ParcelsPlugin.getParcelSuspend(): Parcel? {
+            val ownedParcelsSerialized = storage.getOwnedParcels(owner).await()
+            val ownedParcels = ownedParcelsSerialized
+                .map { parcelProvider.getParcelById(it) }
+                .filter { it != null && world == it.world && owner == it.owner }
+            return ownedParcels.getOrNull(index)
+        }
+    }
+
+    annotation class Kind(val kind: Int)
+
+    companion object Config : ParameterConfig<Kind, Int>(Kind::class.java) {
+        override fun toParameterInfo(annotation: Kind): Int {
+            return annotation.kind
+        }
+
+        const val ID = 1 // ID
+        const val OWNER_REAL = 2 // an owner backed by a UUID
+        const val OWNER_FAKE = 3 // an owner not backed by a UUID
+
+        const val OWNER = OWNER_REAL or OWNER_FAKE // any owner
+        const val ANY = ID or OWNER_REAL or OWNER_FAKE // any
+        const val REAL = ID or OWNER_REAL // no owner not backed by a UUID
+
+        const val DEFAULT_KIND = REAL
+
+        const val PREFER_OWNED_FOR_DEFAULT = 4 // if the kind can be ID and OWNER_REAL, prefer OWNER_REAL for default
+        // instead of parcel that the player is in
+    }
+
+    class PType(val parcelProvider: ParcelProvider) : ParameterType<ParcelTarget, Int>(ParcelTarget::class.java, ParcelTarget.Config) {
+
+        override fun parse(parameter: Parameter<ParcelTarget, Int>, sender: CommandSender, buffer: ArgumentBuffer): ParcelTarget {
+            var input = buffer.next()
+            val worldString = input.substringBefore("->", missingDelimiterValue = "")
+            input = input.substringAfter("->")
+
+            val world = if (worldString.isEmpty()) {
+                val player = requirePlayer(sender, parameter, "the world")
+                parcelProvider.getWorld(player.world)
+                    ?: invalidInput(parameter, "You cannot omit the world if you're not in a parcel world")
+            } else {
+                parcelProvider.getWorld(worldString) ?: invalidInput(parameter, "$worldString is not a parcel world")
+            }
+
+            val kind = parameter.paramInfo ?: DEFAULT_KIND
+            if (input.contains(',')) {
+                if (kind and ID == 0) invalidInput(parameter, "You must specify a parcel by OWNER, that is, an owner and index")
+                return ByID(world, getId(parameter, input), false)
+            }
+
+            if (kind and OWNER == 0) invalidInput(parameter, "You must specify a parcel by ID, that is, the x and z component separated by a comma")
+            val (owner, index) = getHomeIndex(parameter, sender, input)
+            return ByOwner(world, owner, index, false)
+        }
+
+        private fun getId(parameter: Parameter<*, *>, input: String): Vec2i {
+            val x = input.substringBefore(',').run {
+                toIntOrNull() ?: invalidInput(parameter, "ID(x) must be an integer, $this is not an integer")
+            }
+            val z = input.substringAfter(',').run {
+                toIntOrNull() ?: invalidInput(parameter, "ID(z) must be an integer, $this is not an integer")
+            }
+            return Vec2i(x, z)
+        }
+
+        private fun getHomeIndex(parameter: Parameter<*, Int>, sender: CommandSender, input: String): Pair<ParcelOwner, Int> {
+            val splitIdx = input.indexOf(':')
+            val ownerString: String
+            val indexString: String
+
+            if (splitIdx == -1) {
+                // just the index.
+                ownerString = ""
+                indexString = input
+            } else {
+                ownerString = input.substring(0, splitIdx)
+                indexString = input.substring(splitIdx + 1)
+            }
+
+            val owner = if (ownerString.isEmpty())
+                ParcelOwner(requirePlayer(sender, parameter, "the player"))
+            else
+                inputAsOwner(parameter, ownerString)
+
+            val index = if (indexString.isEmpty()) 0 else indexString.toIntOrNull()
+                ?: invalidInput(parameter, "The home index must be an integer, $indexString is not an integer")
+
+            return owner to index
+        }
+
+        private fun requirePlayer(sender: CommandSender, parameter: Parameter<*, *>, objName: String): Player {
+            if (sender !is Player) invalidInput(parameter, "console cannot omit the $objName")
+            return sender
+        }
+
+        @Suppress("DEPRECATION")
+        private fun inputAsOwner(parameter: Parameter<*, Int>, input: String): ParcelOwner {
+            val kind = parameter.paramInfo ?: DEFAULT_KIND
+            if (kind and OWNER_REAL == 0) {
+                return ParcelOwner(input)
+            }
+
+            val player = Bukkit.getOfflinePlayer(input).takeIf { it.isValid }
+            if (player == null) {
+                if (kind and OWNER_FAKE == 0) invalidInput(parameter, "The player $input does not exist")
+                return ParcelOwner(input)
+            }
+
+            return ParcelOwner(player)
+        }
+
+        override fun getDefaultValue(parameter: Parameter<ParcelTarget, Int>, sender: CommandSender, buffer: ArgumentBuffer): ParcelTarget? {
+            val kind = parameter.paramInfo ?: DEFAULT_KIND
+            val useLocation = when {
+                kind and REAL == REAL -> kind and PREFER_OWNED_FOR_DEFAULT == 0
+                kind and ID != 0 -> true
+                kind and OWNER_REAL != 0 -> false
+                else -> return null
+            }
+
+            val player = requirePlayer(sender, parameter, "the parcel")
+            val world = parcelProvider.getWorld(player.world) ?: invalidInput(parameter, "You must be in a parcel world to omit the parcel")
+            if (useLocation) {
+                val id = player.location.let { world.getParcelIdAt(it.x.floor(), it.z.floor())?.pos }
+                return ByID(world, id, true)
+            }
+
+            return ByOwner(world, ParcelOwner(player), 0, true)
+        }
+    }
+}

src/main/kotlin/io/dico/parcels2/command/ParcelsChatController.kt

@@ -4,5 +4,8 @@ import io.dico.dicore.command.chat.AbstractChatController
 
 class ParcelsChatController : AbstractChatController() {
 
+    override fun filterMessage(message: String?): String {
+        return "[Parcels] $message"
+    }
 
 }

src/main/kotlin/io/dico/parcels2/defaultimpl/DefaultParcelContainer.kt

@@ -0,0 +1,65 @@
+package io.dico.parcels2.defaultimpl
+
+import io.dico.parcels2.Parcel
+import io.dico.parcels2.ParcelContainer
+import io.dico.parcels2.ParcelWorld
+import kotlin.coroutines.experimental.buildIterator
+import kotlin.coroutines.experimental.buildSequence
+
+class DefaultParcelContainer(val world: ParcelWorld) : ParcelContainer {
+    private var parcels: Array<Array<Parcel>>
+
+    init {
+        parcels = initArray(world.options.axisLimit, world)
+    }
+
+    fun resizeIfSizeChanged() {
+        if (parcels.size != world.options.axisLimit * 2 + 1) {
+            resize(world.options.axisLimit)
+        }
+    }
+
+    fun resize(axisLimit: Int) {
+        parcels = initArray(axisLimit, world, this)
+    }
+
+    fun initArray(axisLimit: Int, world: ParcelWorld, cur: DefaultParcelContainer? = null): Array<Array<Parcel>> {
+        val arraySize = 2 * axisLimit + 1
+        return Array(arraySize) {
+            val x = it - axisLimit
+            Array(arraySize) {
+                val z = it - axisLimit
+                cur?.getParcelById(x, z) ?: ParcelImpl(world, x, z)
+            }
+        }
+    }
+
+    override fun getParcelById(x: Int, z: Int): Parcel? {
+        return parcels.getOrNull(x + world.options.axisLimit)?.getOrNull(z + world.options.axisLimit)
+    }
+
+    override fun nextEmptyParcel(): Parcel? {
+        return walkInCircle().find { it.owner == null }
+    }
+
+    private fun walkInCircle(): Iterable<Parcel> = Iterable {
+        buildIterator {
+            val center = world.options.axisLimit
+            for (radius in 0..center) {
+                var x = center - radius;
+                var z = center - radius
+                repeat(radius * 2) { yield(parcels[x++][z]) }
+                repeat(radius * 2) { yield(parcels[x][z++]) }
+                repeat(radius * 2) { yield(parcels[x--][z]) }
+                repeat(radius * 2) { yield(parcels[x][z--]) }
+            }
+        }
+    }
+
+    fun allParcels(): Sequence<Parcel> = buildSequence {
+        for (array in parcels) {
+            yieldAll(array.iterator())
+        }
+    }
+
+}

src/main/kotlin/io/dico/parcels2/defaultimpl/DefaultParcelGenerator.kt

@@ -0,0 +1,267 @@
+package io.dico.parcels2.defaultimpl
+
+import io.dico.parcels2.*
+import io.dico.parcels2.blockvisitor.RegionTraversal
+import io.dico.parcels2.blockvisitor.Worker
+import io.dico.parcels2.blockvisitor.WorktimeLimiter
+import io.dico.parcels2.util.*
+import org.bukkit.*
+import org.bukkit.block.Biome
+import org.bukkit.block.Block
+import org.bukkit.block.BlockFace
+import org.bukkit.block.Skull
+import org.bukkit.block.data.BlockData
+import org.bukkit.block.data.type.Sign
+import org.bukkit.block.data.type.Slab
+import java.util.Random
+
+private val airType = Bukkit.createBlockData(Material.AIR)
+
+data class DefaultGeneratorOptions(var defaultBiome: Biome = Biome.JUNGLE,
+                                   var wallType: BlockData = Bukkit.createBlockData(Material.STONE_SLAB),
+                                   var floorType: BlockData = Bukkit.createBlockData(Material.QUARTZ_BLOCK),
+                                   var fillType: BlockData = Bukkit.createBlockData(Material.QUARTZ_BLOCK),
+                                   var pathMainType: BlockData = Bukkit.createBlockData(Material.SANDSTONE),
+                                   var pathAltType: BlockData = Bukkit.createBlockData(Material.REDSTONE_BLOCK),
+                                   var parcelSize: Int = 101,
+                                   var pathSize: Int = 9,
+                                   var floorHeight: Int = 64,
+                                   var offsetX: Int = 0,
+                                   var offsetZ: Int = 0) : GeneratorOptions() {
+
+    override fun generatorFactory(): GeneratorFactory = DefaultParcelGenerator.Factory
+}
+
+class DefaultParcelGenerator(val name: String, private val o: DefaultGeneratorOptions) : ParcelGenerator() {
+    private var _world: World? = null
+    override val world: World
+        get() {
+            if (_world == null) _world = Bukkit.getWorld(name)!!.also {
+                maxHeight = it.maxHeight
+                return it
+            }
+            return _world!!
+        }
+
+    private var maxHeight = 0
+
+    companion object Factory : GeneratorFactory {
+        override val name get() = "default"
+        override val optionsClass get() = DefaultGeneratorOptions::class
+        override fun newParcelGenerator(worldName: String, options: GeneratorOptions): ParcelGenerator {
+            return DefaultParcelGenerator(worldName, options as DefaultGeneratorOptions)
+        }
+    }
+
+    val sectionSize = o.parcelSize + o.pathSize
+    val pathOffset = (if (o.pathSize % 2 == 0) o.pathSize + 2 else o.pathSize + 1) / 2
+    val makePathMain = o.pathSize > 2
+    val makePathAlt = o.pathSize > 4
+
+    private inline fun <T> generate(chunkX: Int,
+                                    chunkZ: Int,
+                                    floor: T, wall:
+                                    T, pathMain: T,
+                                    pathAlt: T,
+                                    fill: T,
+                                    setter: (Int, Int, Int, T) -> Unit) {
+
+        val floorHeight = o.floorHeight
+        val parcelSize = o.parcelSize
+        val sectionSize = sectionSize
+        val pathOffset = pathOffset
+        val makePathMain = makePathMain
+        val makePathAlt = makePathAlt
+
+        // parcel bottom x and z
+        // umod is unsigned %: the result is always >= 0
+        val pbx = ((chunkX shl 4) - o.offsetX) umod sectionSize
+        val pbz = ((chunkZ shl 4) - o.offsetZ) umod sectionSize
+
+        var curHeight: Int
+        var x: Int
+        var z: Int
+        for (cx in 0..15) {
+            for (cz in 0..15) {
+                x = (pbx + cx) % sectionSize - pathOffset
+                z = (pbz + cz) % sectionSize - pathOffset
+                curHeight = floorHeight
+
+                val type = when {
+                    (x in 0 until parcelSize && z in 0 until parcelSize) -> floor
+                    (x in -1..parcelSize && z in -1..parcelSize) -> {
+                        curHeight++
+                        wall
+                    }
+                    (makePathAlt && x in -2 until parcelSize + 2 && z in -2 until parcelSize + 2) -> pathAlt
+                    (makePathMain) -> pathMain
+                    else -> {
+                        curHeight++
+                        wall
+                    }
+                }
+
+                for (y in 0 until curHeight) {
+                    setter(cx, y, cz, fill)
+                }
+                setter(cx, curHeight, cz, type)
+            }
+        }
+    }
+
+    override fun generateChunkData(world: World?, random: Random?, chunkX: Int, chunkZ: Int, biome: BiomeGrid?): ChunkData {
+        val out = Bukkit.createChunkData(world)
+        generate(chunkX, chunkZ, o.floorType, o.wallType, o.pathMainType, o.pathAltType, o.fillType) { x, y, z, type ->
+            out.setBlock(x, y, z, type)
+        }
+        return out
+    }
+
+    override fun populate(world: World?, random: Random?, chunk: Chunk?) {
+        // do nothing
+    }
+
+    override fun getFixedSpawnLocation(world: World?, random: Random?): Location {
+        val fix = if (o.parcelSize.even) 0.5 else 0.0
+        return Location(world, o.offsetX + fix, o.floorHeight + 1.0, o.offsetZ + fix)
+    }
+
+    override fun makeParcelBlockManager(worktimeLimiter: WorktimeLimiter): ParcelBlockManager {
+        return ParcelBlockManagerImpl(worktimeLimiter)
+    }
+
+    override fun makeParcelLocator(container: ParcelContainer): ParcelLocator {
+        return ParcelLocatorImpl(container)
+    }
+
+    private inline fun <T> convertBlockLocationToId(x: Int, z: Int, mapper: (Int, Int) -> T): T? {
+        val sectionSize = sectionSize
+        val parcelSize = o.parcelSize
+        val absX = x - o.offsetX - pathOffset
+        val absZ = z - o.offsetZ - pathOffset
+        val modX = absX umod sectionSize
+        val modZ = absZ umod sectionSize
+        if (modX in 0 until parcelSize && modZ in 0 until parcelSize) {
+            return mapper((absX - modX) / sectionSize, (absZ - modZ) / sectionSize)
+        }
+        return null
+    }
+
+    private inner class ParcelLocatorImpl(val container: ParcelContainer) : ParcelLocator {
+        override val world: World = this@DefaultParcelGenerator.world
+        override fun getParcelAt(x: Int, z: Int): Parcel? {
+            return convertBlockLocationToId(x, z, container::getParcelById)
+        }
+
+        override fun getParcelIdAt(x: Int, z: Int): ParcelId? {
+            return convertBlockLocationToId(x, z) { idx, idz -> ParcelId(world.name, world.uid, idx, idz) }
+        }
+    }
+
+    @Suppress("DEPRECATION")
+    private inner class ParcelBlockManagerImpl(override val worktimeLimiter: WorktimeLimiter) : ParcelBlockManager {
+        override val world: World = this@DefaultParcelGenerator.world
+
+        override fun getBottomBlock(parcel: ParcelId): Vec2i = Vec2i(
+            sectionSize * parcel.pos.x + pathOffset + o.offsetX,
+            sectionSize * parcel.pos.z + pathOffset + o.offsetZ
+        )
+
+        override fun getHomeLocation(parcel: ParcelId): Location {
+            val bottom = getBottomBlock(parcel)
+            return Location(world, bottom.x.toDouble(), o.floorHeight + 1.0, bottom.z + (o.parcelSize - 1) / 2.0, -90F, 0F)
+        }
+
+        override fun setOwnerBlock(parcel: ParcelId, owner: ParcelOwner?) {
+            val b = getBottomBlock(parcel)
+
+            val wallBlock = world.getBlockAt(b.x - 1, o.floorHeight + 1, b.z - 1)
+            val signBlock = world.getBlockAt(b.x - 2, o.floorHeight + 1, b.z - 1)
+            val skullBlock = world.getBlockAt(b.x - 1, o.floorHeight + 2, b.z - 1)
+
+            if (owner == null) {
+                wallBlock.blockData = o.wallType
+                signBlock.type = Material.AIR
+                skullBlock.type = Material.AIR
+            } else {
+
+                val wallBlockType: BlockData = if (o.wallType is Slab)
+                    (o.wallType.clone() as Slab).apply { type = Slab.Type.DOUBLE }
+                else
+                    o.wallType
+
+                wallBlock.blockData = wallBlockType
+
+                signBlock.blockData = (Bukkit.createBlockData(Material.WALL_SIGN) as Sign).apply { rotation = BlockFace.NORTH }
+
+                val sign = signBlock.state as org.bukkit.block.Sign
+                sign.setLine(0, "${parcel.x},${parcel.z}")
+                sign.setLine(2, owner.name)
+                sign.update()
+
+                skullBlock.type = Material.PLAYER_HEAD
+                val skull = skullBlock.state as Skull
+                if (owner.uuid != null) {
+                    skull.owningPlayer = owner.offlinePlayer
+                } else {
+                    skull.owner = owner.name
+                }
+                skull.rotation = BlockFace.WEST
+                skull.update()
+            }
+        }
+
+        override fun setBiome(parcel: ParcelId, biome: Biome): Worker = worktimeLimiter.submit {
+            val world = world
+            val b = getBottomBlock(parcel)
+            val parcelSize = o.parcelSize
+            for (x in b.x until b.x + parcelSize) {
+                for (z in b.z until b.z + parcelSize) {
+                    markSuspensionPoint()
+                    world.setBiome(x, z, biome)
+                }
+            }
+        }
+
+        override fun clearParcel(parcel: ParcelId): Worker = worktimeLimiter.submit {
+            val bottom = getBottomBlock(parcel)
+            val region = Region(Vec3i(bottom.x, 0, bottom.z), Vec3i(o.parcelSize, maxHeight + 1, o.parcelSize))
+            val blocks = RegionTraversal.DOWNWARD.regionTraverser(region)
+            val blockCount = region.blockCount.toDouble()
+
+            val world = world
+            val floorHeight = o.floorHeight
+            val airType = airType
+            val floorType = o.floorType
+            val fillType = o.fillType
+
+            for ((index, vec) in blocks.withIndex()) {
+                markSuspensionPoint()
+                val y = vec.y
+                val blockType = when {
+                    y > floorHeight -> airType
+                    y == floorHeight -> floorType
+                    else -> fillType
+                }
+                world[vec].blockData = blockType
+                setProgress((index + 1) / blockCount)
+            }
+        }
+
+        override fun doBlockOperation(parcel: ParcelId, direction: RegionTraversal, operation: (Block) -> Unit): Worker = worktimeLimiter.submit {
+            val bottom = getBottomBlock(parcel)
+            val region = Region(Vec3i(bottom.x, 0, bottom.z), Vec3i(o.parcelSize, maxHeight + 1, o.parcelSize))
+            val blocks = direction.regionTraverser(region)
+            val blockCount = region.blockCount.toDouble()
+            val world = world
+
+            for ((index, vec) in blocks.withIndex()) {
+                markSuspensionPoint()
+                operation(world[vec])
+                setProgress((index + 1) / blockCount)
+            }
+        }
+
+    }
+
+}

src/main/kotlin/io/dico/parcels2/defaultimpl/GlobalAddedDataManagerImpl.kt

@@ -0,0 +1,39 @@
+@file:Suppress("UNCHECKED_CAST")
+
+package io.dico.parcels2.defaultimpl
+
+import io.dico.parcels2.*
+import java.util.Collections
+import java.util.UUID
+
+class GlobalAddedDataManagerImpl(val plugin: ParcelsPlugin) : GlobalAddedDataManager {
+    private val map = mutableMapOf<ParcelOwner, GlobalAddedData>()
+
+    override fun get(owner: ParcelOwner): GlobalAddedData {
+        return map[owner] ?: GlobalAddedDataImpl(owner).also { map[owner] = it }
+    }
+
+    private inner class GlobalAddedDataImpl(override val owner: ParcelOwner,
+                                            data: MutableAddedDataMap = emptyData)
+        : AddedDataHolder(data), GlobalAddedData {
+
+        private inline var data get() = addedMap; set(value) = run { addedMap = value }
+        private inline val isEmpty get() = data === emptyData
+
+        override fun setAddedStatus(uuid: UUID, status: AddedStatus): Boolean {
+            if (isEmpty) {
+                if (status == AddedStatus.DEFAULT) return false
+                data = mutableMapOf()
+            }
+            return super.setAddedStatus(uuid, status).also {
+                if (it) plugin.storage.setGlobalAddedStatus(owner, uuid, status)
+            }
+        }
+
+    }
+
+    private companion object {
+        val emptyData = Collections.emptyMap<Any, Any>() as MutableAddedDataMap
+    }
+
+}

src/main/kotlin/io/dico/parcels2/defaultimpl/ParcelImpl.kt

@@ -0,0 +1,163 @@
+package io.dico.parcels2.defaultimpl
+
+import io.dico.dicore.Formatting
+import io.dico.parcels2.*
+import io.dico.parcels2.util.Vec2i
+import io.dico.parcels2.util.getPlayerName
+import org.bukkit.OfflinePlayer
+import org.joda.time.DateTime
+import java.util.UUID
+import kotlin.reflect.KProperty
+
+class ParcelImpl(override val world: ParcelWorld,
+                 override val x: Int,
+                 override val z: Int) : Parcel, ParcelId {
+    override val id: ParcelId = this
+    override val pos get() = Vec2i(x, z)
+    override var data: ParcelDataHolder = ParcelDataHolder(); private set
+    override val infoString by ParcelInfoStringComputer
+    override var hasBlockVisitors: Boolean = false; private set
+    override val worldId: ParcelWorldId get() = world.id
+
+    override fun copyDataIgnoringDatabase(data: ParcelData) {
+        this.data = ((data as? Parcel)?.data ?: data) as ParcelDataHolder
+    }
+
+    override fun copyData(data: ParcelData) {
+        copyDataIgnoringDatabase(data)
+        world.storage.setParcelData(this, data)
+    }
+
+    override fun dispose() {
+        copyDataIgnoringDatabase(ParcelDataHolder())
+        world.storage.setParcelData(this, null)
+    }
+
+    override val addedMap: Map<UUID, AddedStatus> get() = data.addedMap
+    override fun getAddedStatus(uuid: UUID) = data.getAddedStatus(uuid)
+    override fun isBanned(uuid: UUID) = data.isBanned(uuid)
+    override fun isAllowed(uuid: UUID) = data.isAllowed(uuid)
+    override fun canBuild(player: OfflinePlayer, checkAdmin: Boolean, checkGlobal: Boolean): Boolean {
+        return (data.canBuild(player, checkAdmin, false))
+            || checkGlobal && world.globalAddedData[owner ?: return false].isAllowed(player)
+    }
+
+    val globalAddedMap: Map<UUID, AddedStatus>? get() = owner?.let { world.globalAddedData[it].addedMap }
+
+    override val since: DateTime? get() = data.since
+
+    override var owner: ParcelOwner?
+        get() = data.owner
+        set(value) {
+            if (data.owner != value) {
+                world.storage.setParcelOwner(this, value)
+                data.owner = value
+            }
+        }
+
+    override fun setAddedStatus(uuid: UUID, status: AddedStatus): Boolean {
+        return data.setAddedStatus(uuid, status).also {
+            if (it) world.storage.setParcelPlayerStatus(this, uuid, status)
+        }
+    }
+
+    override var allowInteractInputs: Boolean
+        get() = data.allowInteractInputs
+        set(value) {
+            if (data.allowInteractInputs == value) return
+            world.storage.setParcelAllowsInteractInputs(this, value)
+            data.allowInteractInputs = value
+        }
+
+    override var allowInteractInventory: Boolean
+        get() = data.allowInteractInventory
+        set(value) {
+            if (data.allowInteractInventory == value) return
+            world.storage.setParcelAllowsInteractInventory(this, value)
+            data.allowInteractInventory = value
+        }
+
+
+}
+
+private object ParcelInfoStringComputer {
+    val infoStringColor1 = Formatting.GREEN
+    val infoStringColor2 = Formatting.AQUA
+
+    private inline fun StringBuilder.appendField(field: StringBuilder.() -> Unit, value: StringBuilder.() -> Unit) {
+        append(infoStringColor1)
+        field()
+        append(": ")
+        append(infoStringColor2)
+        value()
+        append(' ')
+    }
+
+    private inline fun StringBuilder.appendField(name: String, value: StringBuilder.() -> Unit) {
+        append(infoStringColor1)
+        append(name)
+        append(": ")
+        append(infoStringColor2)
+        value()
+        append(' ')
+    }
+
+    private fun StringBuilder.appendAddedList(local: Map<UUID, AddedStatus>, global: Map<UUID, AddedStatus>, status: AddedStatus, fieldName: String) {
+        val globalSet = global.filterValues { it == status }.keys
+        val localList = local.filterValues { it == status }.keys.filter { it !in globalSet }
+        val stringList = globalSet.map(::getPlayerName).map { "(G)$it" } + localList.map(::getPlayerName)
+        if (stringList.isEmpty()) return
+
+        appendField({
+            append(fieldName)
+            append('(')
+            append(infoStringColor2)
+            append(stringList.size)
+            append(infoStringColor1)
+            append(')')
+        }) {
+            stringList.joinTo(this,
+                separator = infoStringColor1.toString() + ", " + infoStringColor2,
+                limit = 150)
+        }
+    }
+
+    operator fun getValue(parcel: Parcel, property: KProperty<*>): String = buildString {
+        appendField("ID") {
+            append(parcel.x)
+            append(',')
+            append(parcel.z)
+        }
+
+        val owner = parcel.owner
+        appendField("Owner") {
+            if (owner == null) {
+                append(infoStringColor1)
+                append("none")
+            } else {
+                append(owner.notNullName)
+            }
+        }
+
+        // plotme appends biome here
+
+        append('\n')
+
+        val global = owner?.let { parcel.world.globalAddedData[owner].addedMap } ?: emptyMap()
+        val local = parcel.addedMap
+        appendAddedList(local, global, AddedStatus.ALLOWED, "Allowed")
+        append('\n')
+        appendAddedList(local, global, AddedStatus.BANNED, "Banned")
+
+        if (!parcel.allowInteractInputs || !parcel.allowInteractInventory) {
+            appendField("Options") {
+                append("(")
+                appendField("inputs") { append(parcel.allowInteractInputs) }
+                append(", ")
+                appendField("inventory") { append(parcel.allowInteractInventory) }
+                append(")")
+            }
+        }
+
+    }
+}

src/main/kotlin/io/dico/parcels2/defaultimpl/ParcelProviderImpl.kt

@@ -0,0 +1,119 @@
+package io.dico.parcels2.defaultimpl
+
+import io.dico.parcels2.*
+import org.bukkit.Bukkit
+import org.bukkit.WorldCreator
+
+class ParcelProviderImpl(val plugin: ParcelsPlugin) : ParcelProvider {
+    inline val options get() = plugin.options
+    override val worlds: Map<String, ParcelWorld> get() = _worlds
+    private val _worlds: MutableMap<String, ParcelWorld> = hashMapOf()
+    private val _generators: MutableMap<String, ParcelGenerator> = hashMapOf()
+    private var _worldsLoaded = false
+    private var _dataIsLoaded = false
+
+    // disabled while !_dataIsLoaded. getParcelById() will work though for data loading.
+    override fun getWorld(name: String): ParcelWorld? = _worlds[name]?.takeIf { _dataIsLoaded }
+
+    override fun getWorldById(id: ParcelWorldId): ParcelWorld? {
+        if (id is ParcelWorld) return id
+        return _worlds[id.name] ?: id.bukkitWorld?.let { getWorld(it) }
+    }
+
+    override fun getParcelById(id: ParcelId): Parcel? {
+        if (id is Parcel) return id
+        return getWorldById(id.worldId)?.container?.getParcelById(id.x, id.z)
+    }
+
+    override fun getWorldGenerator(worldName: String): ParcelGenerator? {
+        return _worlds[worldName]?.generator
+            ?: _generators[worldName]
+            ?: options.worlds[worldName]?.generator?.newGenerator(worldName)?.also { _generators[worldName] = it }
+    }
+
+    override fun loadWorlds() {
+        if (_worldsLoaded) throw IllegalStateException()
+        _worldsLoaded = true
+        loadWorlds0()
+    }
+
+    private fun loadWorlds0() {
+        if (Bukkit.getWorlds().isEmpty()) {
+            plugin.functionHelper.schedule(::loadWorlds0)
+            plugin.logger.warning("Scheduling to load worlds in the next tick, \nbecause no bukkit worlds are loaded yet")
+            return
+        }
+
+        for ((worldName, worldOptions) in options.worlds.entries) {
+            var parcelWorld = _worlds[worldName]
+            if (parcelWorld != null) continue
+
+            val generator: ParcelGenerator = getWorldGenerator(worldName)!!
+            val bukkitWorld = Bukkit.getWorld(worldName) ?: WorldCreator(worldName).generator(generator).createWorld()
+            parcelWorld = ParcelWorldImpl(bukkitWorld, generator, worldOptions.runtime, plugin.storage,
+                plugin.globalAddedData, ::DefaultParcelContainer, plugin.worktimeLimiter)
+            _worlds[worldName] = parcelWorld
+        }
+
+        loadStoredData()
+    }
+
+    private fun loadStoredData() {
+        plugin.functionHelper.launchLazilyOnMainThread {
+            val channel = plugin.storage.readAllParcelData()
+            do {
+                val pair = channel.receiveOrNull() ?: break
+                val parcel = getParcelById(pair.first) ?: continue
+                pair.second?.let { parcel.copyDataIgnoringDatabase(it) }
+            } while (true)
+
+            _dataIsLoaded = true
+        }.start()
+    }
+
+    /*
+    fun loadWorlds(options: Options) {
+        for ((worldName, worldOptions) in options.worlds.entries) {
+            val world: ParcelWorld
+            try {
+
+                world = ParcelWorldImpl(
+                    worldName,
+                    worldOptions,
+                    worldOptions.generator.newGenerator(this, worldName),
+                    plugin.storage,
+                    plugin.globalAddedData,
+                    ::DefaultParcelContainer)
+
+            } catch (ex: Exception) {
+                ex.printStackTrace()
+                continue
+            }
+
+            _worlds[worldName] = world
+        }
+
+        plugin.functionHelper.schedule(10) {
+            println("Parcels generating parcelProvider now")
+            for ((name, world) in _worlds) {
+                if (Bukkit.getWorld(name) == null) {
+                    val bworld = WorldCreator(name).generator(world.generator).createWorld()
+                    val spawn = world.generator.getFixedSpawnLocation(bworld, null)
+                    bworld.setSpawnLocation(spawn.x.floor(), spawn.y.floor(), spawn.z.floor())
+                }
+            }
+
+            val channel = plugin.storage.readAllParcelData()
+            val job = plugin.functionHelper.launchLazilyOnMainThread {
+                do {
+                    val pair = channel.receiveOrNull() ?: break
+                    val parcel = getParcelById(pair.first) ?: continue
+                    pair.second?.let { parcel.copyDataIgnoringDatabase(it) }
+                } while (true)
+            }
+            job.start()
+        }
+
+    }
+    */
+}

src/main/kotlin/io/dico/parcels2/defaultimpl/ParcelWorldImpl.kt

@@ -0,0 +1,94 @@
+@file:Suppress("CanBePrimaryConstructorProperty", "UsePropertyAccessSyntax")
+
+package io.dico.parcels2.defaultimpl
+
+import io.dico.parcels2.*
+import io.dico.parcels2.blockvisitor.WorktimeLimiter
+import io.dico.parcels2.storage.Storage
+import org.bukkit.World
+import java.util.UUID
+
+class ParcelWorldImpl private
+constructor(override val world: World,
+            override val generator: ParcelGenerator,
+            override var options: WorldOptions,
+            override val storage: Storage,
+            override val globalAddedData: GlobalAddedDataManager,
+            containerFactory: ParcelContainerFactory,
+            blockManager: ParcelBlockManager)
+    : ParcelWorld,
+      ParcelWorldId,
+      ParcelContainer, // missing delegation
+      ParcelLocator, // missing delegation
+      ParcelBlockManager by blockManager {
+    override val id: ParcelWorldId get() = this
+    override val uid: UUID? get() = world.uid
+
+    init {
+        if (generator.world != world) {
+            throw IllegalArgumentException()
+        }
+    }
+
+    override val name: String = world.name!!
+    override val container: ParcelContainer = containerFactory(this)
+    override val locator: ParcelLocator = generator.makeParcelLocator(container)
+    override val blockManager: ParcelBlockManager = blockManager
+
+    init {
+        enforceOptions()
+    }
+
+    fun enforceOptions() {
+        if (options.dayTime) {
+            world.setGameRuleValue("doDaylightCycle", "false")
+            world.setTime(6000)
+        }
+
+        if (options.noWeather) {
+            world.setStorm(false)
+            world.setThundering(false)
+            world.weatherDuration = Integer.MAX_VALUE
+        }
+
+        world.setGameRuleValue("doTileDrops", "${options.doTileDrops}")
+    }
+
+    /*
+    Interface delegation needs to be implemented manually because JetBrains has yet to fix it.
+     */
+
+    companion object {
+        // Use this to be able to delegate blockManager and assign it to a property too, at least.
+        operator fun invoke(world: World,
+                            generator: ParcelGenerator,
+                            options: WorldOptions,
+                            storage: Storage,
+                            globalAddedData: GlobalAddedDataManager,
+                            containerFactory: ParcelContainerFactory,
+                            worktimeLimiter: WorktimeLimiter): ParcelWorldImpl {
+            val blockManager = generator.makeParcelBlockManager(worktimeLimiter)
+            return ParcelWorldImpl(world, generator, options, storage, globalAddedData, containerFactory, blockManager)
+        }
+    }
+
+    // ParcelLocator interface
+    override fun getParcelAt(x: Int, z: Int): Parcel? {
+        return locator.getParcelAt(x, z)
+    }
+
+    override fun getParcelIdAt(x: Int, z: Int): ParcelId? {
+        return locator.getParcelIdAt(x, z)
+    }
+
+    // ParcelContainer interface
+    override fun getParcelById(x: Int, z: Int): Parcel? {
+        return container.getParcelById(x, z)
+    }
+
+    override fun nextEmptyParcel(): Parcel? {
+        return container.nextEmptyParcel()
+    }
+
+
+}

src/main/kotlin/io/dico/parcels2/listener/ListenerHelper.kt

@@ -0,0 +1,16 @@
+package io.dico.parcels2.listener
+
+import io.dico.dicore.RegistratorListener
+import io.dico.parcels2.ParcelsPlugin
+import org.bukkit.event.Event
+
+interface HasPlugin {
+    val plugin: ParcelsPlugin
+}
+
+inline fun <reified T : Event> HasPlugin.listener(crossinline block: suspend (T) -> Unit) = RegistratorListener<T> { event ->
+
+
+}
+
+

src/main/kotlin/io/dico/parcels2/listener/ParcelEntityTracker.kt

@@ -1,12 +1,12 @@
 package io.dico.parcels2.listener
 
 import io.dico.parcels2.Parcel
-import io.dico.parcels2.Worlds
+import io.dico.parcels2.ParcelProvider
 import io.dico.parcels2.util.editLoop
 import io.dico.parcels2.util.isPresentAnd
 import org.bukkit.entity.Entity
 
-class ParcelEntityTracker(val worlds: Worlds) {
+class ParcelEntityTracker(val parcelProvider: ParcelProvider) {
     val map = mutableMapOf<Entity, Parcel?>()
 
     fun untrack(entity: Entity) {
@@ -32,7 +32,7 @@ class ParcelEntityTracker(val worlds: Worlds) {
             if (parcel.isPresentAnd { hasBlockVisitors }) {
                 remove()
             }
-            val newParcel = worlds.getParcelAt(entity.location)
+            val newParcel = parcelProvider.getParcelAt(entity.location)
             if (newParcel !== parcel && !newParcel.isPresentAnd { hasBlockVisitors }) {
                 remove()
                 entity.remove()

src/main/kotlin/io/dico/parcels2/listener/ParcelListeners.kt

@@ -4,8 +4,8 @@ import gnu.trove.TLongCollection
 import io.dico.dicore.ListenerMarker
 import io.dico.dicore.RegistratorListener
 import io.dico.parcels2.Parcel
+import io.dico.parcels2.ParcelProvider
 import io.dico.parcels2.ParcelWorld
-import io.dico.parcels2.Worlds
 import io.dico.parcels2.util.*
 import org.bukkit.Material.*
 import org.bukkit.World
@@ -26,11 +26,10 @@ import org.bukkit.event.player.*
 import org.bukkit.event.vehicle.VehicleMoveEvent
 import org.bukkit.event.weather.WeatherChangeEvent
 import org.bukkit.event.world.StructureGrowEvent
-import org.bukkit.event.world.WorldLoadEvent
 import org.bukkit.inventory.InventoryHolder
 
 @Suppress("NOTHING_TO_INLINE")
-class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker) {
+class ParcelListeners(val parcelProvider: ParcelProvider, val entityTracker: ParcelEntityTracker) {
     private inline fun Parcel?.canBuildN(user: Player) = isPresentAnd { canBuild(user) } || user.hasBuildAnywhere
 
     /**
@@ -40,8 +39,8 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
      * returns null if not in a registered parcel world
      */
     private fun getWoAndPPa(block: Block): Pair<ParcelWorld, Parcel?>? {
-        val world = worlds.getWorld(block.world) ?: return null
-        return world to world.parcelAt(block)
+        val world = parcelProvider.getWorld(block.world) ?: return null
+        return world to world.getParcelAt(block)
     }
 
     /*
@@ -51,10 +50,10 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
     val onPlayerMoveEvent = RegistratorListener<PlayerMoveEvent> l@{ event ->
         val user = event.player
         if (user.hasBanBypass) return@l
-        val parcel = worlds.getParcelAt(event.to) ?: return@l
+        val parcel = parcelProvider.getParcelAt(event.to) ?: return@l
         if (parcel.isBanned(user.uuid)) {
-            worlds.getParcelAt(event.from)?.also {
-                user.teleport(it.homeLocation)
+            parcelProvider.getParcelAt(event.from)?.also {
+                user.teleport(it.world.getHomeLocation(it.id))
                 user.sendParcelMessage(nopermit = true, message = "You are banned from this parcel")
             } ?: run { event.to = event.from }
         }
@@ -113,7 +112,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
     private inline fun TLongCollection.troveForEach(block: (Long) -> Unit) = iterator().let { while (it.hasNext()) block(it.next()) }
     //@formatter:on
     private fun checkPistonMovement(event: BlockPistonEvent, blocks: List<Block>) {
-        val world = worlds.getWorld(event.block.world) ?: return
+        val world = parcelProvider.getWorld(event.block.world) ?: return
         val direction = event.direction
         val columns = gnu.trove.set.hash.TLongHashSet(blocks.size * 2)
 
@@ -123,7 +122,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
         }
 
         columns.troveForEach {
-            val ppa = world.parcelAt(it.columnX, it.columnZ)
+            val ppa = world.getParcelAt(it.columnX, it.columnZ)
             if (ppa.isNullOr { hasBlockVisitors }) {
                 event.isCancelled = true
                 return
@@ -150,8 +149,8 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
     @field:ListenerMarker(priority = NORMAL)
     val onEntityExplodeEvent = RegistratorListener<EntityExplodeEvent> l@{ event ->
         entityTracker.untrack(event.entity)
-        val world = worlds.getWorld(event.entity.world) ?: return@l
-        if (world.options.disableExplosions || world.parcelAt(event.entity).isPresentAnd { hasBlockVisitors }) {
+        val world = parcelProvider.getWorld(event.entity.world) ?: return@l
+        if (world.options.disableExplosions || world.getParcelAt(event.entity).isPresentAnd { hasBlockVisitors }) {
             event.isCancelled = true
         }
     }
@@ -175,9 +174,9 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
     @field:ListenerMarker(priority = NORMAL)
     val onPlayerInteractEvent = RegistratorListener<PlayerInteractEvent> l@{ event ->
         val user = event.player
-        val world = worlds.getWorld(user.world) ?: return@l
+        val world = parcelProvider.getWorld(user.world) ?: return@l
         val clickedBlock = event.clickedBlock
-        val parcel = clickedBlock?.let { world.parcelAt(it) }
+        val parcel = clickedBlock?.let { world.getParcelAt(it) }
 
         if (!user.hasBuildAnywhere && parcel.isPresentAnd { isBanned(user.uuid) }) {
             user.sendParcelMessage(nopermit = true, message = "You cannot interact with parcels you're banned from")
@@ -300,7 +299,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
      */
     @field:ListenerMarker(priority = NORMAL)
     val onEntityCreatePortalEvent = RegistratorListener<EntityCreatePortalEvent> l@{ event ->
-        val world = worlds.getWorld(event.entity.world) ?: return@l
+        val world = parcelProvider.getWorld(event.entity.world) ?: return@l
         if (world.options.blockPortalCreation) event.isCancelled = true
     }
 
@@ -341,7 +340,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
      */
     @field:ListenerMarker(priority = NORMAL)
     val onWeatherChangeEvent = RegistratorListener<WeatherChangeEvent> l@{ event ->
-        val world = worlds.getWorld(event.world) ?: return@l
+        val world = parcelProvider.getWorld(event.world) ?: return@l
         if (world.options.noWeather && event.toWeatherState()) {
             event.isCancelled = true
         }
@@ -353,29 +352,6 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
         world.weatherDuration = Int.MAX_VALUE
     }
 
-    /*
-     * Sets time to day and doDayLightCycle gamerule if requested by the config for that world
-     * Sets the weather to sunny if requested by the config for that world.
-     */
-    @field:ListenerMarker(priority = NORMAL)
-    val onWorldLoadEvent = RegistratorListener<WorldLoadEvent> l@{ event ->
-        enforceWorldSettingsIfApplicable(event.world)
-    }
-
-    fun enforceWorldSettingsIfApplicable(w: World) {
-        val world = worlds.getWorld(w) ?: return
-        if (world.options.dayTime) {
-            w.setGameRuleValue("doDaylightCycle", "false")
-            w.time = 6000
-        }
-
-        if (world.options.noWeather) {
-            resetWeather(w)
-        }
-
-        w.setGameRuleValue("doTileDrops", world.options.doTileDrops.toString())
-    }
-
     // TODO: BlockFormEvent, BlockSpreadEvent, BlockFadeEvent
 
     /*
@@ -396,10 +372,10 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
 
         val cancel: Boolean = when (block.type) {
 
-            // prevent ice generation from Frost Walkers enchantment
+        // prevent ice generation from Frost Walkers enchantment
             ICE -> player != null && !ppa.canBuild(player)
 
-            // prevent snow generation from weather
+        // prevent snow generation from weather
             SNOW -> !hasEntity && wo.options.preventWeatherBlockChanges
 
             else -> false
@@ -415,10 +391,10 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
      */
     @field:ListenerMarker(priority = NORMAL)
     val onEntitySpawnEvent = RegistratorListener<EntitySpawnEvent> l@{ event ->
-        val world = worlds.getWorld(event.entity.world) ?: return@l
+        val world = parcelProvider.getWorld(event.entity.world) ?: return@l
         if (event.entity is Creature && world.options.blockMobSpawning) {
             event.isCancelled = true
-        } else if (world.parcelAt(event.entity).isPresentAnd { hasBlockVisitors }) {
+        } else if (world.getParcelAt(event.entity).isPresentAnd { hasBlockVisitors }) {
             event.isCancelled = true
         }
     }
@@ -448,7 +424,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
      */
     @field:ListenerMarker(priority = NORMAL)
     val onEntityDamageByEntityEvent = RegistratorListener<EntityDamageByEntityEvent> l@{ event ->
-        val world = worlds.getWorld(event.entity.world) ?: return@l
+        val world = parcelProvider.getWorld(event.entity.world) ?: return@l
         if (world.options.disableExplosions && event.damager is ExplosiveMinecart || event.damager is Creeper) {
             event.isCancelled = true; return@l
         }
@@ -457,19 +433,19 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
             ?: (event.damager as? Projectile)?.let { it.shooter as? Player }
             ?: return@l
 
-        if (!world.parcelAt(event.entity).canBuildN(user)) {
+        if (!world.getParcelAt(event.entity).canBuildN(user)) {
             event.isCancelled = true
         }
     }
 
     @field:ListenerMarker(priority = NORMAL)
     val onHangingBreakEvent = RegistratorListener<HangingBreakEvent> l@{ event ->
-        val world = worlds.getWorld(event.entity.world) ?: return@l
+        val world = parcelProvider.getWorld(event.entity.world) ?: return@l
         if (event.cause == HangingBreakEvent.RemoveCause.EXPLOSION && world.options.disableExplosions) {
             event.isCancelled = true; return@l
         }
 
-        if (world.parcelAt(event.entity).isPresentAnd { hasBlockVisitors }) {
+        if (world.getParcelAt(event.entity).isPresentAnd { hasBlockVisitors }) {
             event.isCancelled = true
         }
     }
@@ -480,9 +456,9 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
      */
     @field:ListenerMarker(priority = NORMAL)
     val onHangingBreakByEntityEvent = RegistratorListener<HangingBreakByEntityEvent> l@{ event ->
-        val world = worlds.getWorld(event.entity.world) ?: return@l
+        val world = parcelProvider.getWorld(event.entity.world) ?: return@l
         val user = event.remover as? Player ?: return@l
-        if (!world.parcelAt(event.entity).canBuildN(user)) {
+        if (!world.getParcelAt(event.entity).canBuildN(user)) {
             event.isCancelled = true
         }
     }
@@ -492,9 +468,9 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
      */
     @field:ListenerMarker(priority = NORMAL)
     val onHangingPlaceEvent = RegistratorListener<HangingPlaceEvent> l@{ event ->
-        val world = worlds.getWorld(event.entity.world) ?: return@l
+        val world = parcelProvider.getWorld(event.entity.world) ?: return@l
         val block = event.block.getRelative(event.blockFace)
-        if (!world.parcelAt(block).canBuildN(event.player)) {
+        if (!world.getParcelAt(block).canBuildN(event.player)) {
             event.isCancelled = true
         }
     }
@@ -513,7 +489,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
             event.isCancelled = true; return@l
         }
 
-        event.blocks.removeIf { wo.parcelAt(it.block) !== ppa }
+        event.blocks.removeIf { wo.getParcelAt(it.block) !== ppa }
     }
 
     /*
@@ -523,10 +499,10 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
     val onBlockDispenseEvent = RegistratorListener<BlockDispenseEvent> l@{ event ->
         val block = event.block
         if (!block.type.let { it == DISPENSER || it == DROPPER }) return@l
-        val world = worlds.getWorld(block.world) ?: return@l
+        val world = parcelProvider.getWorld(block.world) ?: return@l
         val data = block.blockData as Directional
         val targetBlock = block.getRelative(data.facing)
-        if (world.parcelAt(targetBlock) == null) {
+        if (world.getParcelAt(targetBlock) == null) {
             event.isCancelled = true
         }
     }
@@ -547,7 +523,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
     @field:ListenerMarker(priority = NORMAL)
     val onEntityTeleportEvent = RegistratorListener<EntityTeleportEvent> l@{ event ->
         val (wo, ppa) = getWoAndPPa(event.from.block) ?: return@l
-        if (ppa !== wo.parcelAt(event.to)) {
+        if (ppa !== wo.getParcelAt(event.to)) {
             event.isCancelled = true
         }
     }
@@ -572,7 +548,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
     @field:ListenerMarker(priority = NORMAL)
     val onEntityDeathEvent = RegistratorListener<EntityDeathEvent> l@{ event ->
         entityTracker.untrack(event.entity)
-        val world = worlds.getWorld(event.entity.world) ?: return@l
+        val world = parcelProvider.getWorld(event.entity.world) ?: return@l
         if (!world.options.dropEntityItems) {
             event.drops.clear()
             event.droppedExp = 0
@@ -584,7 +560,7 @@ class ParcelListeners(val worlds: Worlds, val entityTracker: ParcelEntityTracker
      */
     @field:ListenerMarker(priority = NORMAL)
     val onPlayerChangedWorldEvent = RegistratorListener<PlayerChangedWorldEvent> l@{ event ->
-        val world = worlds.getWorld(event.player.world) ?: return@l
+        val world = parcelProvider.getWorld(event.player.world) ?: return@l
         if (world.options.gameMode != null && !event.player.hasGamemodeBypass) {
             event.player.gameMode = world.options.gameMode
         }

src/main/kotlin/io/dico/parcels2/storage/Backing.kt

@@ -1,11 +1,8 @@
 package io.dico.parcels2.storage
 
-import io.dico.parcels2.AddedData
-import io.dico.parcels2.Parcel
-import io.dico.parcels2.ParcelData
-import io.dico.parcels2.ParcelOwner
-import kotlinx.coroutines.experimental.channels.ProducerScope
-import java.util.*
+import io.dico.parcels2.*
+import kotlinx.coroutines.experimental.channels.SendChannel
+import java.util.UUID
 
 interface Backing {
 
@@ -22,30 +19,32 @@ interface Backing {
      * This producer function is capable of constantly reading parcels from a potentially infinite sequence,
      * and provide parcel data for it as read from the database.
      */
-    suspend fun ProducerScope<Pair<Parcel, ParcelData?>>.produceParcelData(parcels: Sequence<Parcel>)
+    suspend fun produceParcelData(channel: SendChannel<DataPair>, parcels: Sequence<ParcelId>)
 
-    suspend fun ProducerScope<Pair<SerializableParcel, ParcelData?>>.produceAllParcelData()
+    suspend fun produceAllParcelData(channel: SendChannel<DataPair>)
 
-    suspend fun readParcelData(parcelFor: Parcel): ParcelData?
+    suspend fun readParcelData(parcel: ParcelId): ParcelData?
 
-    suspend fun getOwnedParcels(user: ParcelOwner): List<SerializableParcel>
+    suspend fun getOwnedParcels(user: ParcelOwner): List<ParcelId>
 
     suspend fun getNumParcels(user: ParcelOwner): Int = getOwnedParcels(user).size
 
 
-    suspend fun setParcelData(parcelFor: Parcel, data: ParcelData?)
+    suspend fun setParcelData(parcel: ParcelId, data: ParcelData?)
 
-    suspend fun setParcelOwner(parcelFor: Parcel, owner: ParcelOwner?)
+    suspend fun setParcelOwner(parcel: ParcelId, owner: ParcelOwner?)
 
-    suspend fun setParcelPlayerState(parcelFor: Parcel, player: UUID, state: Boolean?)
+    suspend fun setLocalPlayerStatus(parcel: ParcelId, player: UUID, status: AddedStatus)
 
-    suspend fun setParcelAllowsInteractInventory(parcel: Parcel, value: Boolean)
+    suspend fun setParcelAllowsInteractInventory(parcel: ParcelId, value: Boolean)
 
-    suspend fun setParcelAllowsInteractInputs(parcel: Parcel, value: Boolean)
+    suspend fun setParcelAllowsInteractInputs(parcel: ParcelId, value: Boolean)
 
 
-    suspend fun readGlobalPlayerStateData(owner: ParcelOwner): AddedData?
+    suspend fun produceAllGlobalAddedData(channel: SendChannel<AddedDataPair<ParcelOwner>>)
 
-    suspend fun setGlobalPlayerState(owner: ParcelOwner, player: UUID, state: Boolean?)
+    suspend fun readGlobalAddedData(owner: ParcelOwner): MutableAddedDataMap
+
+    suspend fun setGlobalPlayerStatus(owner: ParcelOwner, player: UUID, status: AddedStatus)
 
 }

src/main/kotlin/io/dico/parcels2/storage/ExposedBacking.kt

@@ -1,322 +0,0 @@
-package io.dico.parcels2.storage
-
-import com.zaxxer.hikari.HikariDataSource
-import io.dico.parcels2.*
-import io.dico.parcels2.util.Vec2i
-import io.dico.parcels2.util.toByteArray
-import io.dico.parcels2.util.toUUID
-import kotlinx.coroutines.experimental.channels.ProducerScope
-import org.jetbrains.exposed.sql.*
-import org.jetbrains.exposed.sql.SchemaUtils.create
-import org.jetbrains.exposed.sql.transactions.transaction
-import org.jetbrains.exposed.sql.vendors.DatabaseDialect
-import org.joda.time.DateTime
-import java.util.*
-import javax.sql.DataSource
-
-object WorldsT : Table("worlds") {
-    val id = integer("world_id").autoIncrement().primaryKey()
-    val name = varchar("name", 50)
-    val uid = binary("uid", 16)
-    val index_uid = uniqueIndexR("index_uid", uid)
-}
-
-object ParcelsT : Table("parcels") {
-    val id = integer("parcel_id").autoIncrement().primaryKey()
-    val px = integer("px")
-    val pz = integer("pz")
-    val world_id = integer("world_id").references(WorldsT.id)
-    val owner_uuid = binary("owner_uuid", 16).nullable()
-    val owner_name = varchar("owner_name", 16).nullable()
-    val claim_time = datetime("claim_time").nullable()
-    val index_location = uniqueIndexR("index_location", world_id, px, pz)
-}
-
-object AddedLocalT : Table("parcels_added_local") {
-    val parcel_id = integer("parcel_id").references(ParcelsT.id, ReferenceOption.CASCADE)
-    val player_uuid = binary("player_uuid", 16)
-    val allowed_flag = bool("allowed_flag")
-    val index_pair = uniqueIndexR("index_pair", parcel_id, player_uuid)
-}
-
-object AddedGlobalT : Table("parcels_added_global") {
-    val owner_uuid = binary("owner_uuid", 16)
-    val player_uuid = binary("player_uuid", 16)
-    val allowed_flag = bool("allowed_flag")
-    val index_pair = uniqueIndexR("index_pair", owner_uuid, player_uuid)
-}
-
-object ParcelOptionsT : Table("parcel_options") {
-    val parcel_id = integer("parcel_id").primaryKey().references(ParcelsT.id, ReferenceOption.CASCADE)
-    val interact_inventory = bool("interact_inventory").default(false)
-    val interact_inputs = bool("interact_inputs").default(false)
-}
-
-private class ExposedDatabaseException(message: String? = null) : Exception(message)
-
-@Suppress("NOTHING_TO_INLINE")
-class ExposedBacking(private val dataSourceFactory: () -> DataSource) : Backing {
-    override val name get() = "Exposed"
-    private var dataSource: DataSource? = null
-    private var database: Database? = null
-    private var isShutdown: Boolean = false
-
-    override val isConnected get() = database != null
-
-    companion object {
-        init {
-            Database.registerDialect("mariadb") {
-                Class.forName("org.jetbrains.exposed.sql.vendors.MysqlDialect").newInstance() as DatabaseDialect
-            }
-        }
-    }
-
-    override suspend fun init() {
-        if (isShutdown) throw IllegalStateException()
-        dataSource = dataSourceFactory()
-        database = Database.connect(dataSource!!)
-        transaction(database) {
-            create(WorldsT, ParcelsT, AddedLocalT, ParcelOptionsT)
-        }
-    }
-
-    override suspend fun shutdown() {
-        if (isShutdown) throw IllegalStateException()
-        dataSource?.let {
-            if (it is HikariDataSource) it.close()
-        }
-        database = null
-        isShutdown = true
-    }
-
-    private fun <T> transaction(statement: Transaction.() -> T) = transaction(database, statement)
-
-    private inline fun Transaction.getWorldId(binaryUid: ByteArray): Int? {
-        return WorldsT.select { WorldsT.uid eq binaryUid }.firstOrNull()?.let { it[WorldsT.id] }
-    }
-
-    private inline fun Transaction.getWorldId(worldUid: UUID): Int? {
-        return getWorldId(worldUid.toByteArray()!!)
-    }
-
-    private inline fun Transaction.getOrInitWorldId(worldUid: UUID, worldName: String): Int {
-        val binaryUid = worldUid.toByteArray()!!
-        return getWorldId(binaryUid)
-            ?: WorldsT.insert /*Ignore*/ { it[uid] = binaryUid; it[name] = worldName }.get(WorldsT.id)
-            ?: throw ExposedDatabaseException("This should not happen - failed to insert world named $worldName and get its id")
-    }
-
-    private inline fun Transaction.getParcelId(worldId: Int, parcelX: Int, parcelZ: Int): Int? {
-        return ParcelsT.select { (ParcelsT.world_id eq worldId) and (ParcelsT.px eq parcelX) and (ParcelsT.pz eq parcelZ) }
-            .firstOrNull()?.let { it[ParcelsT.id] }
-    }
-
-    private inline fun Transaction.getParcelId(worldUid: UUID, parcelX: Int, parcelZ: Int): Int? {
-        return getWorldId(worldUid)?.let { getParcelId(it, parcelX, parcelZ) }
-    }
-
-    private inline fun Transaction.getOrInitParcelId(worldUid: UUID, worldName: String, parcelX: Int, parcelZ: Int): Int {
-        val worldId = getOrInitWorldId(worldUid, worldName)
-        return getParcelId(worldId, parcelX, parcelZ)
-            ?: ParcelsT.insert /*Ignore*/ { it[world_id] = worldId; it[px] = parcelX; it[pz] = parcelZ }.get(ParcelsT.id)
-            ?: throw ExposedDatabaseException("This should not happen - failed to insert parcel at $worldName($parcelX, $parcelZ)")
-    }
-
-    private inline fun Transaction.getParcelRow(id: Int): ResultRow? {
-        return ParcelsT.select { ParcelsT.id eq id }.firstOrNull()
-    }
-
-    fun Transaction.getWorldId(world: ParcelWorld): Int? {
-        return getWorldId(world.world.uid)
-    }
-
-    fun Transaction.getOrInitWorldId(world: ParcelWorld): Int {
-        return world.world.let { getOrInitWorldId(it.uid, it.name) }
-    }
-
-    fun Transaction.getParcelId(parcel: Parcel): Int? {
-        return getParcelId(parcel.world.world.uid, parcel.pos.x, parcel.pos.z)
-    }
-
-    fun Transaction.getOrInitParcelId(parcel: Parcel): Int {
-        return parcel.world.world.let { getOrInitParcelId(it.uid, it.name, parcel.pos.x, parcel.pos.z) }
-    }
-
-    fun Transaction.getParcelRow(parcel: Parcel): ResultRow? {
-        return getParcelId(parcel)?.let { getParcelRow(it) }
-    }
-
-    override suspend fun ProducerScope<Pair<Parcel, ParcelData?>>.produceParcelData(parcels: Sequence<Parcel>) {
-        for (parcel in parcels) {
-            val data = readParcelData(parcel)
-            channel.send(parcel to data)
-        }
-        channel.close()
-    }
-
-    override suspend fun ProducerScope<Pair<SerializableParcel, ParcelData?>>.produceAllParcelData() {
-        ParcelsT.selectAll().forEach { row ->
-            val parcel = rowToSerializableParcel(row) ?: return@forEach
-            val data = rowToParcelData(row)
-            channel.send(parcel to data)
-        }
-        channel.close()
-    }
-
-    override suspend fun readParcelData(parcelFor: Parcel): ParcelData? = transaction {
-        val row = getParcelRow(parcelFor) ?: return@transaction null
-        rowToParcelData(row)
-    }
-
-    override suspend fun getOwnedParcels(user: ParcelOwner): List<SerializableParcel> = transaction {
-        val where: SqlExpressionBuilder.() -> Op<Boolean>
-
-        if (user.uuid != null) {
-            val binaryUuid = user.uuid.toByteArray()
-            where = { ParcelsT.owner_uuid eq binaryUuid }
-        } else {
-            val name = user.name
-            where = { ParcelsT.owner_name eq name }
-        }
-
-        ParcelsT.select(where)
-            .orderBy(ParcelsT.claim_time, isAsc = true)
-            .mapNotNull(::rowToSerializableParcel)
-            .toList()
-    }
-
-
-    override suspend fun setParcelData(parcelFor: Parcel, data: ParcelData?) {
-        if (data == null) {
-            transaction {
-                getParcelId(parcelFor)?.let { id ->
-                    ParcelsT.deleteIgnoreWhere() { ParcelsT.id eq id }
-
-                    // Below should cascade automatically
-                    /*
-                    AddedLocalT.deleteIgnoreWhere { AddedLocalT.parcel_id eq id }
-                    ParcelOptionsT.deleteIgnoreWhere(limit = 1) { ParcelOptionsT.parcel_id eq id }
-                    */
-                }
-
-            }
-            return
-        }
-
-        val id = transaction {
-            val id = getOrInitParcelId(parcelFor)
-            AddedLocalT.deleteIgnoreWhere { AddedLocalT.parcel_id eq id }
-            id
-        }
-
-        setParcelOwner(parcelFor, data.owner)
-
-        for ((uuid, status) in data.added) {
-            val state = status.asBoolean
-            setParcelPlayerState(parcelFor, uuid, state)
-        }
-
-        setParcelAllowsInteractInputs(parcelFor, data.allowInteractInputs)
-        setParcelAllowsInteractInventory(parcelFor, data.allowInteractInventory)
-    }
-
-    override suspend fun setParcelOwner(parcelFor: Parcel, owner: ParcelOwner?) = transaction {
-        val binaryUuid = owner?.uuid?.toByteArray()
-        val name = owner?.name
-        val time = owner?.let { DateTime.now() }
-
-        val id = if (owner == null)
-            getParcelId(parcelFor) ?: return@transaction
-        else
-            getOrInitParcelId(parcelFor)
-
-        ParcelsT.update({ ParcelsT.id eq id }) {
-            it[ParcelsT.owner_uuid] = binaryUuid
-            it[ParcelsT.owner_name] = name
-            it[ParcelsT.claim_time] = time
-        }
-    }
-
-    override suspend fun setParcelPlayerState(parcelFor: Parcel, player: UUID, state: Boolean?) = transaction {
-        val binaryUuid = player.toByteArray()!!
-
-        if (state == null) {
-            getParcelId(parcelFor)?.let { id ->
-                AddedLocalT.deleteWhere { (AddedLocalT.parcel_id eq id) and (AddedLocalT.player_uuid eq binaryUuid) }
-            }
-            return@transaction
-        }
-
-        val id = getOrInitParcelId(parcelFor)
-        AddedLocalT.upsert(AddedLocalT.parcel_id) {
-            it[AddedLocalT.parcel_id] = id
-            it[AddedLocalT.player_uuid] = binaryUuid
-        }
-    }
-
-    override suspend fun setParcelAllowsInteractInventory(parcel: Parcel, value: Boolean): Unit = transaction {
-        val id = getOrInitParcelId(parcel)
-        /*ParcelOptionsT.upsert(ParcelOptionsT.parcel_id) {
-            it[ParcelOptionsT.parcel_id] = id
-            it[ParcelOptionsT.interact_inventory] = value
-        }*/
-
-        ParcelOptionsT.upsert(ParcelOptionsT.parcel_id) {
-            it[ParcelOptionsT.parcel_id] = id
-            it[ParcelOptionsT.interact_inventory] = value
-        }
-    }
-
-    override suspend fun setParcelAllowsInteractInputs(parcel: Parcel, value: Boolean): Unit = transaction {
-        val id = getOrInitParcelId(parcel)
-        ParcelOptionsT.upsert(ParcelOptionsT.parcel_id) {
-            it[ParcelOptionsT.parcel_id] = id
-            it[ParcelOptionsT.interact_inputs] = value
-        }
-    }
-
-    override suspend fun readGlobalPlayerStateData(owner: ParcelOwner): AddedData? {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
-    }
-
-    override suspend fun setGlobalPlayerState(owner: ParcelOwner, player: UUID, state: Boolean?) {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
-    }
-
-    private fun rowToSerializableParcel(row: ResultRow): SerializableParcel? {
-        val worldId = row[ParcelsT.world_id]
-        val worldRow = WorldsT.select { WorldsT.id eq worldId }.firstOrNull()
-            ?: return null
-
-        val world = SerializableWorld(worldRow[WorldsT.name], worldRow[WorldsT.uid].toUUID())
-        return SerializableParcel(world, Vec2i(row[ParcelsT.px], row[ParcelsT.pz]))
-    }
-
-    private fun rowToParcelData(row: ResultRow) = ParcelDataHolder().apply {
-        owner = ParcelOwner.create(
-            uuid = row[ParcelsT.owner_uuid]?.toUUID(),
-            name = row[ParcelsT.owner_name],
-            time = row[ParcelsT.claim_time]
-        )
-
-        val parcelId = row[ParcelsT.id]
-        AddedLocalT.select { AddedLocalT.parcel_id eq parcelId }.forEach {
-            val uuid = it[AddedLocalT.player_uuid].toUUID()!!
-            val status = if (it[AddedLocalT.allowed_flag]) AddedStatus.ALLOWED else AddedStatus.BANNED
-            setAddedStatus(uuid, status)
-        }
-
-        ParcelOptionsT.select { ParcelOptionsT.parcel_id eq parcelId }.firstOrNull()?.let {
-            allowInteractInputs = it[ParcelOptionsT.interact_inputs]
-            allowInteractInventory = it[ParcelOptionsT.interact_inventory]
-        }
-    }
-
-}
-
-
-
-
-
-
-

src/main/kotlin/io/dico/parcels2/storage/Jackson.kt

@@ -8,7 +8,7 @@ import com.fasterxml.jackson.databind.ser.BeanSerializerModifier
 import com.fasterxml.jackson.databind.ser.std.StdSerializer
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory
 import com.fasterxml.jackson.module.kotlin.KotlinModule
-import io.dico.parcels2.GeneratorFactory
+import io.dico.parcels2.GeneratorFactories
 import io.dico.parcels2.GeneratorOptions
 import io.dico.parcels2.StorageOptions
 import org.bukkit.Bukkit
@@ -100,7 +100,7 @@ class GeneratorOptionsDeserializer : JsonDeserializer<GeneratorOptions>() {
         val node = parser!!.readValueAsTree<JsonNode>()
         val name = node.get("name").asText()
         val optionsNode = node.get("options")
-        val factory = GeneratorFactory.getFactory(name) ?: throw IllegalStateException("Unknown generator: $name")
+        val factory = GeneratorFactories.getFactory(name) ?: throw IllegalStateException("Unknown generator: $name")
 
         return parser.codec.treeToValue(optionsNode, factory.optionsClass.java)
     }

src/main/kotlin/io/dico/parcels2/storage/SerializableTypes.kt

@@ -1,37 +0,0 @@
-package io.dico.parcels2.storage
-
-import io.dico.parcels2.Parcel
-import io.dico.parcels2.ParcelWorld
-import io.dico.parcels2.Worlds
-import io.dico.parcels2.util.Vec2i
-import org.bukkit.Bukkit
-import org.bukkit.World
-import java.util.*
-
-data class SerializableWorld(val name: String? = null,
-                             val uid: UUID? = null) {
-
-    init {
-        uid ?: name ?: throw IllegalArgumentException("uuid and/or name must be present")
-    }
-
-    val world: World? by lazy { uid?.let { Bukkit.getWorld(it) } ?: name?.let { Bukkit.getWorld(it) } }
-    //val parcelWorld: ParcelWorld? by lazy { TODO() }
-}
-
-/**
- * Used by storage backing options to encompass the location of a parcel
- */
-data class SerializableParcel(val world: SerializableWorld,
-                              val pos: Vec2i) {
-
-    //val parcel: Parcel? by lazy { TODO() }
-}
-
-fun Worlds.getWorldBySerializedValue(input: SerializableWorld): ParcelWorld? {
-    return input.world?.let { getWorld(it) }
-}
-
-fun Worlds.getParcelBySerializedValue(input: SerializableParcel): Parcel? {
-    return getWorldBySerializedValue(input.world)?.parcelByID(input.pos)
-}

src/main/kotlin/io/dico/parcels2/storage/Storage.kt

@@ -1,16 +1,19 @@
+@file:Suppress("NOTHING_TO_INLINE")
+
 package io.dico.parcels2.storage
 
-import io.dico.parcels2.AddedData
-import io.dico.parcels2.Parcel
-import io.dico.parcels2.ParcelData
-import io.dico.parcels2.ParcelOwner
+import io.dico.parcels2.*
 import kotlinx.coroutines.experimental.*
+import kotlinx.coroutines.experimental.channels.ProducerScope
 import kotlinx.coroutines.experimental.channels.ReceiveChannel
 import kotlinx.coroutines.experimental.channels.produce
-import java.util.*
+import java.util.UUID
 import java.util.concurrent.Executor
 import java.util.concurrent.Executors
 
+typealias DataPair = Pair<ParcelId, ParcelData?>
+typealias AddedDataPair<TAttach> = Pair<TAttach, MutableAddedDataMap>
+
 interface Storage {
     val name: String
     val syncDispatcher: CoroutineDispatcher
@@ -22,31 +25,33 @@ interface Storage {
     fun shutdown(): Job
 
 
-    fun readParcelData(parcelFor: Parcel): Deferred<ParcelData?>
+    fun readParcelData(parcel: ParcelId): Deferred<ParcelData?>
 
-    fun readParcelData(parcelsFor: Sequence<Parcel>, channelCapacity: Int): ReceiveChannel<Pair<Parcel, ParcelData?>>
+    fun readParcelData(parcels: Sequence<ParcelId>): ReceiveChannel<DataPair>
 
-    fun readAllParcelData(channelCapacity: Int): ReceiveChannel<Pair<SerializableParcel, ParcelData?>>
+    fun readAllParcelData(): ReceiveChannel<DataPair>
 
-    fun getOwnedParcels(user: ParcelOwner): Deferred<List<SerializableParcel>>
+    fun getOwnedParcels(user: ParcelOwner): Deferred<List<ParcelId>>
 
     fun getNumParcels(user: ParcelOwner): Deferred<Int>
 
 
-    fun setParcelData(parcelFor: Parcel, data: ParcelData?): Job
+    fun setParcelData(parcel: ParcelId, data: ParcelData?): Job
 
-    fun setParcelOwner(parcelFor: Parcel, owner: ParcelOwner?): Job
+    fun setParcelOwner(parcel: ParcelId, owner: ParcelOwner?): Job
 
-    fun setParcelPlayerState(parcelFor: Parcel, player: UUID, state: Boolean?): Job
+    fun setParcelPlayerStatus(parcel: ParcelId, player: UUID, status: AddedStatus): Job
 
-    fun setParcelAllowsInteractInventory(parcel: Parcel, value: Boolean): Job
+    fun setParcelAllowsInteractInventory(parcel: ParcelId, value: Boolean): Job
 
-    fun setParcelAllowsInteractInputs(parcel: Parcel, value: Boolean): Job
+    fun setParcelAllowsInteractInputs(parcel: ParcelId, value: Boolean): Job
 
 
-    fun readGlobalPlayerStateData(owner: ParcelOwner): Deferred<AddedData?>
+    fun readAllGlobalAddedData(): ReceiveChannel<AddedDataPair<ParcelOwner>>
 
-    fun setGlobalPlayerState(owner: ParcelOwner, player: UUID, state: Boolean?): Job
+    fun readGlobalAddedData(owner: ParcelOwner): Deferred<MutableAddedDataMap?>
+
+    fun setGlobalAddedStatus(owner: ParcelOwner, player: UUID, status: AddedStatus): Job
 }
 
 class StorageWithCoroutineBacking internal constructor(val backing: Backing) : Storage {
@@ -55,46 +60,49 @@ class StorageWithCoroutineBacking internal constructor(val backing: Backing) : S
     val poolSize: Int get() = 4
     override val asyncDispatcher = Executors.newFixedThreadPool(poolSize) { Thread(it, "Parcels2_StorageThread") }.asCoroutineDispatcher()
     override val isConnected get() = backing.isConnected
+    val channelCapacity = 16
 
-    @Suppress("NOTHING_TO_INLINE")
     private inline fun <T> defer(noinline block: suspend CoroutineScope.() -> T): Deferred<T> {
         return async(context = asyncDispatcher, start = CoroutineStart.ATOMIC, block = block)
     }
 
-    @Suppress("NOTHING_TO_INLINE")
     private inline fun job(noinline block: suspend CoroutineScope.() -> Unit): Job {
         return launch(context = asyncDispatcher, start = CoroutineStart.ATOMIC, block = block)
     }
 
+    private inline fun <T> openChannel(noinline block: suspend ProducerScope<T>.() -> Unit): ReceiveChannel<T> {
+        return produce(asyncDispatcher, capacity = channelCapacity, block = block)
+    }
+
     override fun init() = job { backing.init() }
 
     override fun shutdown() = job { backing.shutdown() }
 
 
-    override fun readParcelData(parcelFor: Parcel) = defer { backing.readParcelData(parcelFor) }
+    override fun readParcelData(parcel: ParcelId) = defer { backing.readParcelData(parcel) }
 
-    override fun readParcelData(parcelsFor: Sequence<Parcel>, channelCapacity: Int) =
-        produce(asyncDispatcher, capacity = channelCapacity) { with(backing) { produceParcelData(parcelsFor) } }
+    override fun readParcelData(parcels: Sequence<ParcelId>) = openChannel<DataPair> { backing.produceParcelData(channel, parcels) }
 
-    override fun readAllParcelData(channelCapacity: Int): ReceiveChannel<Pair<SerializableParcel, ParcelData?>> =
-        produce(asyncDispatcher, capacity = channelCapacity) { with(backing) { produceAllParcelData() } }
+    override fun readAllParcelData() = openChannel<DataPair> { backing.produceAllParcelData(channel) }
 
     override fun getOwnedParcels(user: ParcelOwner) = defer { backing.getOwnedParcels(user) }
 
     override fun getNumParcels(user: ParcelOwner) = defer { backing.getNumParcels(user) }
 
-    override fun setParcelData(parcelFor: Parcel, data: ParcelData?) = job { backing.setParcelData(parcelFor, data) }
+    override fun setParcelData(parcel: ParcelId, data: ParcelData?) = job { backing.setParcelData(parcel, data) }
 
-    override fun setParcelOwner(parcelFor: Parcel, owner: ParcelOwner?) = job { backing.setParcelOwner(parcelFor, owner) }
+    override fun setParcelOwner(parcel: ParcelId, owner: ParcelOwner?) = job { backing.setParcelOwner(parcel, owner) }
 
-    override fun setParcelPlayerState(parcelFor: Parcel, player: UUID, state: Boolean?) = job { backing.setParcelPlayerState(parcelFor, player, state) }
+    override fun setParcelPlayerStatus(parcel: ParcelId, player: UUID, status: AddedStatus) = job { backing.setLocalPlayerStatus(parcel, player, status) }
 
-    override fun setParcelAllowsInteractInventory(parcel: Parcel, value: Boolean) = job { backing.setParcelAllowsInteractInventory(parcel, value) }
+    override fun setParcelAllowsInteractInventory(parcel: ParcelId, value: Boolean) = job { backing.setParcelAllowsInteractInventory(parcel, value) }
 
-    override fun setParcelAllowsInteractInputs(parcel: Parcel, value: Boolean) = job { backing.setParcelAllowsInteractInputs(parcel, value) }
+    override fun setParcelAllowsInteractInputs(parcel: ParcelId, value: Boolean) = job { backing.setParcelAllowsInteractInputs(parcel, value) }
 
 
-    override fun readGlobalPlayerStateData(owner: ParcelOwner): Deferred<AddedData?> = defer { backing.readGlobalPlayerStateData(owner) }
+    override fun readAllGlobalAddedData(): ReceiveChannel<AddedDataPair<ParcelOwner>> = openChannel { backing.produceAllGlobalAddedData(channel) }
 
-    override fun setGlobalPlayerState(owner: ParcelOwner, player: UUID, state: Boolean?) = job { backing.setGlobalPlayerState(owner, player, state) }
+    override fun readGlobalAddedData(owner: ParcelOwner): Deferred<MutableAddedDataMap?> = defer { backing.readGlobalAddedData(owner) }
+
+    override fun setGlobalAddedStatus(owner: ParcelOwner, player: UUID, status: AddedStatus) = job { backing.setGlobalPlayerStatus(owner, player, status) }
 }

src/main/kotlin/io/dico/parcels2/storage/StorageFactory.kt

@@ -2,6 +2,7 @@ package io.dico.parcels2.storage
 
 import com.zaxxer.hikari.HikariDataSource
 import io.dico.parcels2.DataConnectionOptions
+import io.dico.parcels2.storage.exposed.ExposedBacking
 import kotlin.reflect.KClass
 
 interface StorageFactory {
@@ -35,8 +36,8 @@ class ConnectionStorageFactory : StorageFactory {
 
     override fun newStorageInstance(dialect: String, options: Any): Storage {
         val hikariConfig = getHikariConfig(dialect, options as DataConnectionOptions)
-        val dataSourceFactory = { HikariDataSource(hikariConfig) }
+        val dataSourceFactory = suspend { HikariDataSource(hikariConfig) }
         return StorageWithCoroutineBacking(ExposedBacking(dataSourceFactory))
     }
 
-}
+}

src/main/kotlin/io/dico/parcels2/storage/exposed/ExposedBacking.kt

@@ -0,0 +1,196 @@
+@file:Suppress("NOTHING_TO_INLINE", "PARAMETER_NAME_CHANGED_ON_OVERRIDE", "LocalVariableName")
+
+package io.dico.parcels2.storage.exposed
+
+import com.zaxxer.hikari.HikariDataSource
+import io.dico.parcels2.*
+import io.dico.parcels2.storage.Backing
+import io.dico.parcels2.storage.DataPair
+import io.dico.parcels2.util.toUUID
+import kotlinx.coroutines.experimental.CoroutineStart
+import kotlinx.coroutines.experimental.Unconfined
+import kotlinx.coroutines.experimental.channels.SendChannel
+import kotlinx.coroutines.experimental.launch
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.SchemaUtils.create
+import org.jetbrains.exposed.sql.transactions.transaction
+import org.jetbrains.exposed.sql.vendors.DatabaseDialect
+import org.joda.time.DateTime
+import java.util.UUID
+import javax.sql.DataSource
+
+class ExposedDatabaseException(message: String? = null) : Exception(message)
+
+class ExposedBacking(private val dataSourceFactory: suspend () -> DataSource) : Backing {
+    override val name get() = "Exposed"
+    private var dataSource: DataSource? = null
+    private var database: Database? = null
+    private var isShutdown: Boolean = false
+
+    override val isConnected get() = database != null
+
+    companion object {
+        init {
+            Database.registerDialect("mariadb") {
+                Class.forName("org.jetbrains.exposed.sql.vendors.MysqlDialect").newInstance() as DatabaseDialect
+            }
+        }
+    }
+
+    private fun <T> transaction(statement: Transaction.() -> T) = transaction(database!!, statement)
+
+    private suspend fun transactionLaunch(statement: suspend Transaction.() -> Unit): Unit = transaction(database!!) {
+        launch(context = Unconfined, start = CoroutineStart.UNDISPATCHED) {
+            statement(this@transaction)
+        }
+    }
+
+    override suspend fun init() {
+        if (isShutdown) throw IllegalStateException()
+        dataSource = dataSourceFactory()
+        database = Database.connect(dataSource!!)
+        transaction(database) {
+            create(WorldsT, OwnersT, ParcelsT, ParcelOptionsT, AddedLocalT, AddedGlobalT)
+        }
+    }
+
+    override suspend fun shutdown() {
+        if (isShutdown) throw IllegalStateException()
+        dataSource?.let {
+            (it as? HikariDataSource)?.close()
+        }
+        database = null
+        isShutdown = true
+    }
+
+    override suspend fun produceParcelData(channel: SendChannel<DataPair>, parcels: Sequence<ParcelId>) {
+        for (parcel in parcels) {
+            val data = readParcelData(parcel)
+            channel.send(parcel to data)
+        }
+        channel.close()
+    }
+
+    override suspend fun produceAllParcelData(channel: SendChannel<Pair<ParcelId, ParcelData?>>) = transactionLaunch {
+        ParcelsT.selectAll().forEach { row ->
+            val parcel = ParcelsT.getId(row) ?: return@forEach
+            val data = rowToParcelData(row)
+            channel.send(parcel to data)
+        }
+        channel.close()
+    }
+
+    override suspend fun readParcelData(parcel: ParcelId): ParcelData? = transaction {
+        val row = ParcelsT.getRow(parcel) ?: return@transaction null
+        rowToParcelData(row)
+    }
+
+    override suspend fun getOwnedParcels(user: ParcelOwner): List<ParcelId> = transaction {
+        val user_id = OwnersT.getId(user) ?: return@transaction emptyList()
+        ParcelsT.select { ParcelsT.owner_id eq user_id }
+            .orderBy(ParcelsT.claim_time, isAsc = true)
+            .mapNotNull(ParcelsT::getId)
+            .toList()
+    }
+
+    override suspend fun setParcelData(parcel: ParcelId, data: ParcelData?) {
+        if (data == null) {
+            transaction {
+                ParcelsT.getId(parcel)?.let { id ->
+                    ParcelsT.deleteIgnoreWhere { ParcelsT.id eq id }
+
+                    // Below should cascade automatically
+                    /*
+                    AddedLocalT.deleteIgnoreWhere { AddedLocalT.parcel_id eq id }
+                    ParcelOptionsT.deleteIgnoreWhere(limit = 1) { ParcelOptionsT.parcel_id eq id }
+                    */
+                }
+
+            }
+            return
+        }
+
+        transaction {
+            val id = ParcelsT.getOrInitId(parcel)
+            AddedLocalT.deleteIgnoreWhere { AddedLocalT.attach_id eq id }
+        }
+
+        setParcelOwner(parcel, data.owner)
+
+        for ((uuid, status) in data.addedMap) {
+            setLocalPlayerStatus(parcel, uuid, status)
+        }
+
+        setParcelAllowsInteractInputs(parcel, data.allowInteractInputs)
+        setParcelAllowsInteractInventory(parcel, data.allowInteractInventory)
+    }
+
+    override suspend fun setParcelOwner(parcel: ParcelId, owner: ParcelOwner?) = transaction {
+        val id = if (owner == null)
+            ParcelsT.getId(parcel) ?: return@transaction
+        else
+            ParcelsT.getOrInitId(parcel)
+
+        val owner_id = owner?.let { OwnersT.getOrInitId(it) }
+        val time = owner?.let { DateTime.now() }
+
+        ParcelsT.update({ ParcelsT.id eq id }) {
+            it[ParcelsT.owner_id] = owner_id
+            it[claim_time] = time
+        }
+    }
+
+    override suspend fun setLocalPlayerStatus(parcel: ParcelId, player: UUID, status: AddedStatus) = transaction {
+        AddedLocalT.setPlayerStatus(parcel, player, status)
+    }
+
+    override suspend fun setParcelAllowsInteractInventory(parcel: ParcelId, value: Boolean): Unit = transaction {
+        val id = ParcelsT.getOrInitId(parcel)
+        ParcelOptionsT.upsert(ParcelOptionsT.parcel_id) {
+            it[ParcelOptionsT.parcel_id] = id
+            it[ParcelOptionsT.interact_inventory] = value
+        }
+    }
+
+    override suspend fun setParcelAllowsInteractInputs(parcel: ParcelId, value: Boolean): Unit = transaction {
+        val id = ParcelsT.getOrInitId(parcel)
+        ParcelOptionsT.upsert(ParcelOptionsT.parcel_id) {
+            it[ParcelOptionsT.parcel_id] = id
+            it[ParcelOptionsT.interact_inputs] = value
+        }
+    }
+
+    override suspend fun produceAllGlobalAddedData(channel: SendChannel<Pair<ParcelOwner, MutableMap<UUID, AddedStatus>>>) = transactionLaunch {
+        AddedGlobalT.sendAllAddedData(channel)
+        channel.close()
+    }
+
+    override suspend fun readGlobalAddedData(owner: ParcelOwner): MutableMap<UUID, AddedStatus> = transaction {
+        return@transaction AddedGlobalT.readAddedData(OwnersT.getId(owner) ?: return@transaction hashMapOf())
+    }
+
+    override suspend fun setGlobalPlayerStatus(owner: ParcelOwner, player: UUID, status: AddedStatus) = transaction {
+        AddedGlobalT.setPlayerStatus(owner, player, status)
+    }
+
+    private fun rowToParcelData(row: ResultRow) = ParcelDataHolder().apply {
+        owner = row[ParcelsT.owner_id]?.let { OwnersT.getId(it) }
+        since = row[ParcelsT.claim_time]
+
+        val parcelId = row[ParcelsT.id]
+        addedMap = AddedLocalT.readAddedData(parcelId)
+
+        AddedLocalT.select { AddedLocalT.attach_id eq parcelId }.forEach {
+            val uuid = it[AddedLocalT.player_uuid].toUUID()
+            val status = if (it[AddedLocalT.allowed_flag]) AddedStatus.ALLOWED else AddedStatus.BANNED
+            setAddedStatus(uuid, status)
+        }
+
+        ParcelOptionsT.select { ParcelOptionsT.parcel_id eq parcelId }.firstOrNull()?.let {
+            allowInteractInputs = it[ParcelOptionsT.interact_inputs]
+            allowInteractInventory = it[ParcelOptionsT.interact_inventory]
+        }
+    }
+
+}
+

src/main/kotlin/io/dico/parcels2/storage/exposed/ExposedExtensions.kt

@@ -1,4 +1,4 @@
-package io.dico.parcels2.storage
+package io.dico.parcels2.storage.exposed
 
 import org.jetbrains.exposed.sql.Column
 import org.jetbrains.exposed.sql.Index
@@ -40,7 +40,7 @@ class UpsertStatement<Key : Any>(table: Table, conflictColumn: Column<*>? = null
 
         } else {
 
-            append (" ON DUPLICATE KEY UPDATE ")
+            append(" ON DUPLICATE KEY UPDATE ")
             values.keys.filter { it !in indexColumns }.joinTo(this) { "${transaction.identity(it)}=VALUES(${transaction.identity(it)})" }
 
         }

src/main/kotlin/io/dico/parcels2/storage/exposed/IdTables.kt

@@ -0,0 +1,118 @@
+@file:Suppress("NOTHING_TO_INLINE", "PARAMETER_NAME_CHANGED_ON_OVERRIDE", "unused", "MemberVisibilityCanBePrivate")
+
+package io.dico.parcels2.storage.exposed
+
+import io.dico.parcels2.ParcelId
+import io.dico.parcels2.ParcelOwner
+import io.dico.parcels2.ParcelWorldId
+import io.dico.parcels2.util.toByteArray
+import io.dico.parcels2.util.toUUID
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.statements.InsertStatement
+import java.util.UUID
+
+sealed class IdTransactionsTable<TableT : IdTransactionsTable<TableT, QueryObj>, QueryObj>(tableName: String, columnName: String)
+    : Table(tableName) {
+    val id = integer(columnName).autoIncrement().primaryKey()
+
+    @Suppress("UNCHECKED_CAST")
+    inline val table: TableT
+        get() = this as TableT
+
+    internal inline fun getId(where: SqlExpressionBuilder.(TableT) -> Op<Boolean>): Int? {
+        return select { where(table) }.firstOrNull()?.let { it[id] }
+    }
+
+    internal inline fun insertAndGetId(objName: String, noinline body: TableT.(InsertStatement<Number>) -> Unit): Int {
+        return table.insert(body)[id] ?: insertError(objName)
+    }
+
+    private inline fun insertError(obj: String): Nothing = throw ExposedDatabaseException("This should not happen - failed to insert $obj and getParcelDeferred its id")
+
+    abstract fun getId(obj: QueryObj): Int?
+    abstract fun getOrInitId(obj: QueryObj): Int
+    fun getId(id: Int): QueryObj? = select { this@IdTransactionsTable.id eq id }.firstOrNull()?.let { getId(it) }
+    abstract fun getId(row: ResultRow): QueryObj?
+}
+
+object WorldsT : IdTransactionsTable<WorldsT, ParcelWorldId>("parcel_worlds", "world_id") {
+    val name = varchar("name", 50)
+    val uid = binary("uid", 16).nullable()
+    val index_name = uniqueIndexR("index_name", name)
+    val index_uid = uniqueIndexR("index_uid", uid)
+
+    internal inline fun getId(worldName: String, binaryUid: ByteArray?): Int? = getId { (name eq worldName).let { if (binaryUid == null) it else it or (uid eq binaryUid) } }
+    internal inline fun getId(worldName: String, uid: UUID?): Int? = getId(worldName, uid?.toByteArray())
+    internal inline fun getOrInitId(worldName: String, worldUid: UUID?): Int = worldUid?.toByteArray().let { binaryUid ->
+        getId(worldName, binaryUid)
+            ?: insertAndGetId("world named $worldName") { it[name] = worldName; binaryUid?.let { buid -> it[uid] = buid } }
+    }
+
+    override fun getId(world: ParcelWorldId): Int? = getId(world.name, world.uid)
+    override fun getOrInitId(world: ParcelWorldId): Int = getOrInitId(world.name, world.uid)
+
+    override fun getId(row: ResultRow): ParcelWorldId {
+        return ParcelWorldId(row[name], row[uid]?.toUUID())
+    }
+}
+
+object ParcelsT : IdTransactionsTable<ParcelsT, ParcelId>("parcels", "parcel_id") {
+    val world_id = integer("world_id").references(WorldsT.id)
+    val px = integer("px")
+    val pz = integer("pz")
+    val owner_id = integer("owner_id").references(OwnersT.id).nullable()
+    val claim_time = datetime("claim_time").nullable()
+    val index_location = uniqueIndexR("index_location", world_id, px, pz)
+
+    private inline fun getId(worldId: Int, parcelX: Int, parcelZ: Int): Int? = getId { world_id.eq(worldId) and px.eq(parcelX) and pz.eq(parcelZ) }
+    private inline fun getId(worldName: String, worldUid: UUID?, parcelX: Int, parcelZ: Int): Int? = WorldsT.getId(worldName, worldUid)?.let { getId(it, parcelX, parcelZ) }
+    private inline fun getOrInitId(worldName: String, worldUid: UUID?, parcelX: Int, parcelZ: Int): Int {
+        val worldId = WorldsT.getOrInitId(worldName, worldUid)
+        return getId(worldId, parcelX, parcelZ)
+            ?: insertAndGetId("parcel at $worldName($parcelX, $parcelZ)") { it[world_id] = worldId; it[px] = parcelX; it[pz] = parcelZ }
+    }
+
+    override fun getId(parcel: ParcelId): Int? = getId(parcel.worldId.name, parcel.worldId.uid, parcel.x, parcel.z)
+    override fun getOrInitId(parcel: ParcelId): Int = getOrInitId(parcel.worldId.name, parcel.worldId.uid, parcel.x, parcel.z)
+
+    private inline fun getRow(id: Int): ResultRow? = select { ParcelsT.id eq id }.firstOrNull()
+    fun getRow(parcel: ParcelId): ResultRow? = getId(parcel)?.let { getRow(it) }
+
+    override fun getId(row: ResultRow): ParcelId? {
+        val worldId = row[world_id]
+        val world = WorldsT.getId(worldId) ?: return null
+        return ParcelId(world, row[px], row[pz])
+    }
+}
+
+object OwnersT : IdTransactionsTable<OwnersT, ParcelOwner>("parcel_owners", "owner_id") {
+    val uuid = binary("uuid", 16).nullable()
+    val name = varchar("name", 32)
+    val index_pair = uniqueIndexR("index_pair", uuid, name)
+
+    private inline fun getId(binaryUuid: ByteArray) = getId { uuid eq binaryUuid }
+    private inline fun getId(uuid: UUID) = getId(uuid.toByteArray())
+    private inline fun getId(nameIn: String) = getId { uuid.isNull() and (name eq nameIn) }
+
+    private inline fun getOrInitId(uuid: UUID, name: String) = uuid.toByteArray().let { binaryUuid ->
+        getId(binaryUuid) ?: insertAndGetId("owner(uuid = $uuid)") {
+            it[this@OwnersT.uuid] = binaryUuid
+            it[this@OwnersT.name] = name
+        }
+    }
+
+    private inline fun getOrInitId(name: String) =
+        getId(name) ?: insertAndGetId("owner(name = $name)") { it[OwnersT.name] = name }
+
+    override fun getId(owner: ParcelOwner): Int? =
+        if (owner.hasUUID) getId(owner.uuid!!)
+        else getId(owner.name!!)
+
+    override fun getOrInitId(owner: ParcelOwner): Int =
+        if (owner.hasUUID) getOrInitId(owner.uuid!!, owner.notNullName)
+        else getOrInitId(owner.name!!)
+
+    override fun getId(row: ResultRow): ParcelOwner {
+        return row[uuid]?.toUUID()?.let { ParcelOwner(it) } ?: ParcelOwner(row[name])
+    }
+}

src/main/kotlin/io/dico/parcels2/storage/exposed/ListTables.kt

@@ -0,0 +1,102 @@
+@file:Suppress("PropertyName", "LocalVariableName", "NOTHING_TO_INLINE")
+
+package io.dico.parcels2.storage.exposed
+
+import io.dico.parcels2.AddedStatus
+import io.dico.parcels2.ParcelId
+import io.dico.parcels2.ParcelOwner
+import io.dico.parcels2.util.toByteArray
+import io.dico.parcels2.util.toUUID
+import kotlinx.coroutines.experimental.channels.SendChannel
+import org.jetbrains.exposed.sql.*
+import java.util.UUID
+
+object AddedLocalT : AddedTable<ParcelId>("parcels_added_local", ParcelsT)
+object AddedGlobalT : AddedTable<ParcelOwner>("parcels_added_global", OwnersT)
+
+object ParcelOptionsT : Table("parcel_options") {
+    val parcel_id = integer("parcel_id").primaryKey().references(ParcelsT.id, ReferenceOption.CASCADE)
+    val interact_inventory = bool("interact_inventory").default(true)
+    val interact_inputs = bool("interact_inputs").default(true)
+}
+
+typealias AddedStatusSendChannel<AttachT> = SendChannel<Pair<AttachT, MutableMap<UUID, AddedStatus>>>
+
+sealed class AddedTable<AttachT>(name: String, val idTable: IdTransactionsTable<*, AttachT>) : Table(name) {
+    val attach_id = integer("attach_id").references(idTable.id, ReferenceOption.CASCADE)
+    val player_uuid = binary("player_uuid", 16)
+    val allowed_flag = bool("allowed_flag")
+    val index_pair = uniqueIndexR("index_pair", attach_id, player_uuid)
+
+    fun setPlayerStatus(attachedOn: AttachT, player: UUID, status: AddedStatus) {
+        val binaryUuid = player.toByteArray()
+
+        if (status.isDefault) {
+            idTable.getId(attachedOn)?.let { id ->
+                deleteWhere { (attach_id eq id) and (player_uuid eq binaryUuid) }
+            }
+            return
+        }
+
+        val id = idTable.getOrInitId(attachedOn)
+        upsert(conflictIndex = index_pair) {
+            it[attach_id] = id
+            it[player_uuid] = binaryUuid
+            it[allowed_flag] = status.isAllowed
+        }
+    }
+
+    fun readAddedData(id: Int): MutableMap<UUID, AddedStatus> {
+        return slice(player_uuid, allowed_flag).select { attach_id eq id }
+            .associateByTo(hashMapOf(), { it[player_uuid].toUUID() }, { it[allowed_flag].asAddedStatus() })
+    }
+
+    suspend fun sendAllAddedData(channel: AddedStatusSendChannel<AttachT>) {
+        /*
+        val iterator = selectAll().orderBy(attach_id).iterator()
+
+        if (iterator.hasNext()) {
+            val firstRow = iterator.next()
+            var id: Int = firstRow[attach_id]
+            var attach: SerializableT? = null
+            var map: MutableMap<UUID, AddedStatus>? = null
+
+            fun initAttachAndMap() {
+                attach = idTable.getId(id)
+                map = attach?.let { mutableMapOf() }
+            }
+
+            suspend fun sendIfPresent() {
+                if (attach != null && map != null && map!!.isNotEmpty()) {
+                    channel.send(attach!! to map!!)
+                }
+                attach = null
+                map = null
+            }
+
+            initAttachAndMap()
+
+            for (row in iterator) {
+                val rowId = row[attach_id]
+                if (rowId != id) {
+                    sendIfPresent()
+                    id = rowId
+                    initAttachAndMap()
+                }
+
+                if (attach == null) {
+                    continue // owner not found for this owner id
+                }
+
+                val player_uuid = row[player_uuid].toUUID()
+                val status = row[allowed_flag].asAddedStatus()
+                map!![player_uuid] = status
+            }
+
+            sendIfPresent()
+        }*/
+    }
+
+    private inline fun Boolean?.asAddedStatus() = if (this == null) AddedStatus.DEFAULT else if (this) AddedStatus.ALLOWED else AddedStatus.BANNED
+
+}

src/main/kotlin/io/dico/parcels2/storage/migration/Migration.kt

@@ -0,0 +1,8 @@
+package io.dico.parcels2.storage.migration
+
+import io.dico.parcels2.storage.Storage
+
+interface Migration {
+    fun migrateTo(storage: Storage)
+}
+

src/main/kotlin/io/dico/parcels2/storage/migration/MigrationFactory.kt

@@ -0,0 +1,5 @@
+package io.dico.parcels2.storage.migration
+
+interface MigrationFactory {
+    fun getMigration()
+}

src/main/kotlin/io/dico/parcels2/storage/migration/plotme/PlotmeMigration.kt

@@ -0,0 +1,118 @@
+package io.dico.parcels2.storage.migration.plotme
+
+import com.zaxxer.hikari.HikariDataSource
+import io.dico.parcels2.*
+import io.dico.parcels2.storage.Storage
+import io.dico.parcels2.storage.migration.Migration
+import io.dico.parcels2.util.Vec2i
+import io.dico.parcels2.util.isValid
+import io.dico.parcels2.util.toUUID
+import io.dico.parcels2.util.uuid
+import kotlinx.coroutines.experimental.asCoroutineDispatcher
+import kotlinx.coroutines.experimental.launch
+import org.bukkit.Bukkit
+import org.jetbrains.exposed.sql.*
+import org.slf4j.LoggerFactory
+import java.io.ByteArrayOutputStream
+import java.sql.Blob
+import java.util.UUID
+import java.util.concurrent.Executors
+import javax.sql.DataSource
+
+class PlotmeMigration(val parcelProvider: ParcelProvider,
+                      val worldMapper: Map<String, String>,
+                      val dataSourceFactory: () -> DataSource) : Migration {
+    private var dataSource: DataSource? = null
+    private var database: Database? = null
+    private var isShutdown: Boolean = false
+    private val dispatcher = Executors.newSingleThreadExecutor { Thread(it, "PlotMe Migration Thread") }.asCoroutineDispatcher()
+    private val mlogger = LoggerFactory.getLogger("PlotMe Migrator")
+
+    private fun <T> transaction(statement: Transaction.() -> T) = org.jetbrains.exposed.sql.transactions.transaction(database!!, statement)
+
+    override fun migrateTo(storage: Storage) {
+        launch(context = dispatcher) {
+            init()
+            doWork(storage)
+            shutdown()
+        }
+    }
+
+    fun init() {
+        if (isShutdown) throw IllegalStateException()
+        dataSource = dataSourceFactory()
+        database = Database.connect(dataSource!!)
+    }
+
+    fun shutdown() {
+        if (isShutdown) throw IllegalStateException()
+        dataSource?.let {
+            (it as? HikariDataSource)?.close()
+        }
+        database = null
+        isShutdown = true
+    }
+
+    val parcelsCache = hashMapOf<String, MutableMap<Vec2i, ParcelData>>()
+
+    private fun getMap(worldName: String): MutableMap<Vec2i, ParcelData>? {
+        val mapped = worldMapper[worldName] ?: return null
+        return parcelsCache.computeIfAbsent(mapped) { mutableMapOf() }
+    }
+
+    private fun getData(worldName: String, position: Vec2i): ParcelData? {
+        return getMap(worldName)?.computeIfAbsent(position) { ParcelDataHolder() }
+    }
+
+    fun doWork(target: Storage): Unit = transaction {
+        if (!PlotmePlotsT.exists()) {
+            mlogger.warn("Plotme tables don't appear to exist. Exiting.")
+            return@transaction
+        }
+        parcelsCache.clear()
+
+        iterPlotmeTable(PlotmePlotsT) { data, row ->
+            // in practice, owner_uuid is not null for any plot currently. It will convert well.
+            data.owner = ParcelOwner(row[owner_uuid]?.toUUID(), row[owner_name])
+        }
+
+        iterPlotmeTable(PlotmeAllowedT) { data, row ->
+            val uuid = row[player_uuid]?.toUUID()
+                ?: Bukkit.getOfflinePlayer(row[player_name]).takeIf { it.isValid }?.uuid
+                ?: return@iterPlotmeTable
+
+            data.setAddedStatus(uuid, AddedStatus.ALLOWED)
+        }
+
+        iterPlotmeTable(PlotmeDeniedT) { data, row ->
+            val uuid = row[PlotmeAllowedT.player_uuid]?.toUUID()
+                ?: Bukkit.getOfflinePlayer(row[PlotmeAllowedT.player_name]).takeIf { it.isValid }?.uuid
+                ?: return@iterPlotmeTable
+
+            data.setAddedStatus(uuid, AddedStatus.BANNED)
+        }
+
+        for ((worldName, map) in parcelsCache) {
+            val world = ParcelWorldId(worldName)
+            for ((pos, data) in map) {
+                val parcel = ParcelId(world, pos)
+                target.setParcelData(parcel, data)
+            }
+        }
+
+    }
+
+    private fun Blob.toUUID(): UUID {
+        val out = ByteArrayOutputStream(16)
+        binaryStream.copyTo(out, bufferSize = 16)
+        return out.toByteArray().toUUID()
+    }
+
+    private inline fun <T : PlotmeTable> iterPlotmeTable(table: T, block: T.(ParcelData, ResultRow) -> Unit) {
+        table.selectAll().forEach { row ->
+            val data = getData(row[table.world_name], Vec2i(row[table.px], row[table.pz])) ?: return@forEach
+            table.block(data, row)
+        }
+    }
+
+}

src/main/kotlin/io/dico/parcels2/storage/migration/plotme/PlotmeTables.kt

@@ -0,0 +1,26 @@
+package io.dico.parcels2.storage.migration.plotme
+
+import org.jetbrains.exposed.sql.Table
+
+const val uppercase: Boolean = false
+@Suppress("ConstantConditionIf")
+fun String.toCorrectCase() = if (uppercase) this else toLowerCase()
+
+sealed class PlotmeTable(name: String) : Table(name) {
+    val px = PlotmePlotsT.integer("idX").primaryKey()
+    val pz = PlotmePlotsT.integer("idZ").primaryKey()
+    val world_name = PlotmePlotsT.varchar("world", 32).primaryKey()
+}
+
+object PlotmePlotsT : PlotmeTable("plotmePlots".toCorrectCase()) {
+    val owner_name = varchar("owner", 32)
+    val owner_uuid = blob("ownerid").nullable()
+}
+
+sealed class PlotmePlotPlayerMap(name: String) : PlotmeTable(name) {
+    val player_name = PlotmePlotsT.varchar("player", 32)
+    val player_uuid = PlotmePlotsT.blob("playerid").nullable()
+}
+
+object PlotmeAllowedT : PlotmePlotPlayerMap("plotmeAllowed".toCorrectCase())
+object PlotmeDeniedT : PlotmePlotPlayerMap("plotmeDenied".toCorrectCase())

src/main/kotlin/io/dico/parcels2/util/BukkitAwait.kt

@@ -1,74 +0,0 @@
-package io.dico.parcels2.util
-
-import org.bukkit.plugin.Plugin
-import org.bukkit.scheduler.BukkitTask
-
-inline fun Plugin.doAwait(checkNow: Boolean = true, configure: AwaitTask.() -> Unit) {
-    with(AwaitTask()) {
-        configure()
-        start(checkNow = checkNow)
-    }
-}
-
-private typealias Action<T> = () -> T
-
-class AwaitTask : Runnable {
-    //@formatter:off
-    var cond: Action<Boolean>? = null               ; set(value) { checkNotRunning(); field = value }
-    var onSuccess: Action<Unit>? = null             ; set(value) { checkNotRunning(); field = value }
-    var onFailure: Action<Unit>? = null             ; set(value) { checkNotRunning(); field = value }
-    var delay: Int = -1                             ; set(value) { checkNotRunning(); field = value }
-    var interval: Int = 20                          ; set(value) { checkNotRunning(); field = value }
-    var maxChecks: Int = 0                          ; set(value) { checkNotRunning(); field = value }
-
-    var task: BukkitTask? = null                    ; private set
-    var elapsedChecks = 0                           ; private set
-    var cancelled = false                           ; private set
-    //@formatter:on
-
-    fun Plugin.start(checkNow: Boolean = true) {
-        if (cancelled) throw IllegalStateException()
-
-        requireNotNull(cond)
-        requireNotNull(onSuccess)
-
-        if (checkNow && check()) {
-            cancel()
-            onSuccess!!.invoke()
-            return
-        }
-
-        task = server.scheduler.runTaskTimer(this, this@AwaitTask, delay.toLong(), interval.toLong())
-    }
-
-    override fun run() {
-        if (task?.isCancelled != false) return
-
-        if (check()) {
-            cancel()
-            onSuccess!!.invoke()
-        }
-
-        elapsedChecks++
-
-        if (maxChecks in 1 until elapsedChecks) {
-            cancel()
-            onFailure?.invoke()
-        }
-    }
-
-    private fun check(): Boolean {
-        elapsedChecks++
-        return cond!!.invoke()
-    }
-
-    fun cancel() {
-        task?.cancel()
-        cancelled = true
-    }
-
-    private fun checkNotRunning() {
-        if (cancelled || task != null) throw IllegalStateException()
-    }
-
-}

src/main/kotlin/io/dico/parcels2/util/FunctionHelper.kt

@@ -0,0 +1,53 @@
+package io.dico.parcels2.util
+
+import io.dico.parcels2.ParcelsPlugin
+import kotlinx.coroutines.experimental.*
+import org.bukkit.scheduler.BukkitTask
+import kotlin.coroutines.experimental.CoroutineContext
+
+@Suppress("NOTHING_TO_INLINE")
+class FunctionHelper(val plugin: ParcelsPlugin) {
+    val mainThreadDispatcher: MainThreadDispatcher = MainThreadDispatcherImpl()
+
+    fun <T> deferLazilyOnMainThread(block: suspend CoroutineScope.() -> T): Deferred<T> {
+        return async(context = mainThreadDispatcher, start = CoroutineStart.LAZY, block = block)
+    }
+
+    fun <T> deferUndispatchedOnMainThread(block: suspend CoroutineScope.() -> T): Deferred<T> {
+        return async(context = mainThreadDispatcher, start = CoroutineStart.UNDISPATCHED, block = block)
+    }
+
+    fun launchLazilyOnMainThread(block: suspend CoroutineScope.() -> Unit): Job {
+        return launch(context = mainThreadDispatcher, start = CoroutineStart.LAZY, block = block)
+    }
+
+    inline fun schedule(noinline task: () -> Unit) = schedule(0, task)
+
+    fun schedule(delay: Int, task: () -> Unit): BukkitTask {
+        return plugin.server.scheduler.runTaskLater(plugin, task, delay.toLong())
+    }
+
+    fun scheduleRepeating(delay: Int, interval: Int, task: () -> Unit): BukkitTask {
+        return plugin.server.scheduler.runTaskTimer(plugin, task, delay.toLong(), interval.toLong())
+    }
+
+    abstract class MainThreadDispatcher : CoroutineDispatcher() {
+        abstract val mainThread: Thread
+        abstract fun runOnMainThread(task: Runnable)
+    }
+
+    private inner class MainThreadDispatcherImpl : MainThreadDispatcher() {
+        override val mainThread: Thread = Thread.currentThread()
+
+        override fun dispatch(context: CoroutineContext, block: Runnable) {
+            runOnMainThread(block)
+        }
+
+        @Suppress("OVERRIDE_BY_INLINE")
+        override inline fun runOnMainThread(task: Runnable) {
+            if (Thread.currentThread() === mainThread) task.run()
+            else plugin.server.scheduler.runTaskLater(plugin, task, 0)
+        }
+    }
+
+}

src/main/kotlin/io/dico/parcels2/util/MaterialExtensions.kt

@@ -10,62 +10,67 @@ wood:
 OAK_$, BIRCH_$, SPRUCE_$, JUNGLE_$, ACACIA_$, DARK_OAK_$,
  */
 
-val Material.isBed get() = when(this) {
-    WHITE_BED,
-    ORANGE_BED,
-    MAGENTA_BED,
-    LIGHT_BLUE_BED,
-    YELLOW_BED,
-    LIME_BED,
-    PINK_BED,
-    GRAY_BED,
-    LIGHT_GRAY_BED,
-    CYAN_BED,
-    PURPLE_BED,
-    BLUE_BED,
-    BROWN_BED,
-    GREEN_BED,
-    RED_BED,
-    BLACK_BED -> true
-    else -> false
-}
+val Material.isBed
+    get() = when (this) {
+        WHITE_BED,
+        ORANGE_BED,
+        MAGENTA_BED,
+        LIGHT_BLUE_BED,
+        YELLOW_BED,
+        LIME_BED,
+        PINK_BED,
+        GRAY_BED,
+        LIGHT_GRAY_BED,
+        CYAN_BED,
+        PURPLE_BED,
+        BLUE_BED,
+        BROWN_BED,
+        GREEN_BED,
+        RED_BED,
+        BLACK_BED -> true
+        else -> false
+    }
 
-val Material.isWoodDoor get() = when(this) {
-    OAK_DOOR,
-    BIRCH_DOOR,
-    SPRUCE_DOOR,
-    JUNGLE_DOOR,
-    ACACIA_DOOR,
-    DARK_OAK_DOOR -> true
-    else -> false
-}
+val Material.isWoodDoor
+    get() = when (this) {
+        OAK_DOOR,
+        BIRCH_DOOR,
+        SPRUCE_DOOR,
+        JUNGLE_DOOR,
+        ACACIA_DOOR,
+        DARK_OAK_DOOR -> true
+        else -> false
+    }
 
-val Material.isWoodTrapdoor get() = when(this) {
-    OAK_TRAPDOOR,
-    BIRCH_TRAPDOOR,
-    SPRUCE_TRAPDOOR,
-    JUNGLE_TRAPDOOR,
-    ACACIA_TRAPDOOR,
-    DARK_OAK_TRAPDOOR -> true
-    else -> false
-}
+val Material.isWoodTrapdoor
+    get() = when (this) {
+        OAK_TRAPDOOR,
+        BIRCH_TRAPDOOR,
+        SPRUCE_TRAPDOOR,
+        JUNGLE_TRAPDOOR,
+        ACACIA_TRAPDOOR,
+        DARK_OAK_TRAPDOOR -> true
+        else -> false
+    }
 
-val Material.isWoodFenceGate get() = when(this) {
-    OAK_FENCE_GATE,
-    BIRCH_FENCE_GATE,
-    SPRUCE_FENCE_GATE,
-    JUNGLE_FENCE_GATE,
-    ACACIA_FENCE_GATE,
-    DARK_OAK_FENCE_GATE -> true
-    else -> false
-}
+val Material.isWoodFenceGate
+    get() = when (this) {
+        OAK_FENCE_GATE,
+        BIRCH_FENCE_GATE,
+        SPRUCE_FENCE_GATE,
+        JUNGLE_FENCE_GATE,
+        ACACIA_FENCE_GATE,
+        DARK_OAK_FENCE_GATE -> true
+        else -> false
+    }
 
-val Material.isWoodButton get() = when(this) {
-    OAK_BUTTON,
-    BIRCH_BUTTON,
-    SPRUCE_BUTTON,
-    JUNGLE_BUTTON,
-    ACACIA_BUTTON,
-    DARK_OAK_BUTTON -> true
-    else -> false
-}
+val Material.isWoodButton
+    get() = when (this) {
+        OAK_BUTTON,
+        BIRCH_BUTTON,
+        SPRUCE_BUTTON,
+        JUNGLE_BUTTON,
+        ACACIA_BUTTON,
+        DARK_OAK_BUTTON -> true
+        else -> false
+    }

src/main/kotlin/io/dico/parcels2/util/PlayerExtensions.kt

@@ -9,7 +9,8 @@ import org.bukkit.plugin.java.JavaPlugin
 
 inline val OfflinePlayer.uuid get() = uniqueId
 @Suppress("UsePropertyAccessSyntax")
-inline val OfflinePlayer.isValid get() = isOnline() || hasPlayedBefore()
+inline val OfflinePlayer.isValid
+    get() = isOnline() || hasPlayedBefore()
 
 inline val Player.hasBanBypass get() = hasPermission("parcels.admin.bypass.ban")
 inline val Player.hasGamemodeBypass get() = hasPermission("parcels.admin.bypass.gamemode")

src/main/kotlin/io/dico/parcels2/util/UUIDUtil.kt

@@ -1,26 +1,25 @@
 package io.dico.parcels2.util
 
 import org.bukkit.Bukkit
-import org.jetbrains.annotations.Contract
 import java.nio.ByteBuffer
-import java.util.*
+import java.util.UUID
 
 @Suppress("UsePropertyAccessSyntax")
-fun getPlayerName(uuid: UUID?, ifUnknown: String? = null): String {
-    return uuid?.let { Bukkit.getOfflinePlayer(uuid)?.takeIf { it.isValid }?.name }
+fun getPlayerNameOrDefault(uuid: UUID?, ifUnknown: String? = null): String {
+    return uuid
+        ?.let { getPlayerName(it) }
         ?: ifUnknown
         ?: ":unknown_name:"
 }
 
-@Contract("null -> null; !null -> !null", pure = true)
-fun UUID?.toByteArray(): ByteArray? = this?.let {
+fun getPlayerName(uuid: UUID): String? {
+    return Bukkit.getOfflinePlayer(uuid)?.takeIf { it.isValid }?.name
+}
+
+fun UUID.toByteArray(): ByteArray =
     ByteBuffer.allocate(16).apply {
         putLong(mostSignificantBits)
         putLong(leastSignificantBits)
     }.array()
-}
 
-@Contract("null -> null; !null -> !null", pure = true)
-fun ByteArray?.toUUID(): UUID? = this?.let {
-    ByteBuffer.wrap(it).run { UUID(long, long) }
-}
+fun ByteArray.toUUID(): UUID = ByteBuffer.wrap(this).run { UUID(long, long) }

src/main/kotlin/io/dico/parcels2/util/Vec3i.kt

@@ -16,4 +16,37 @@ data class Vec3i(
 }
 
 @Suppress("NOTHING_TO_INLINE")
-inline operator fun World.get(vec: Vec3i): Block = getBlockAt(vec.x, vec.y, vec.z)
+inline operator fun World.get(vec: Vec3i): Block = getBlockAt(vec.x, vec.y, vec.z)
+
+/*
+private /*inline */class IVec3i(private val data: Long) {
+
+    private companion object {
+        const val mask = 0x001F_FFFF
+        const val max: Int = 0x000F_FFFF // +1048575
+        const val min: Int = -max - 1    // -1048575 // 0xFFF0_0000
+
+        @Suppress("NOTHING_TO_INLINE")
+        inline fun Int.compressIntoLong(offset: Int): Long {
+            if (this !in min..max) throw IllegalArgumentException()
+            return and(mask).toLong().shl(offset)
+        }
+
+        @Suppress("NOTHING_TO_INLINE")
+        inline fun Long.extractInt(offset: Int): Int {
+            val result = ushr(offset).toInt().and(mask)
+            return if (result > max) result or mask.inv() else result
+        }
+    }
+
+    constructor(x: Int, y: Int, z: Int) : this(
+        x.compressIntoLong(42)
+            or y.compressIntoLong(21)
+            or z.compressIntoLong(0))
+
+    val x: Int get() = data.extractInt(42)
+    val y: Int get() = data.extractInt(21)
+    val z: Int get() = data.extractInt(0)
+
+}
+*/