src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala - minecraft/opencomputers - Rivoreo Source Code Repositories

 package li.cil.oc.common.tileentity

 import com.google.common.base.Strings
 import cpw.mods.fml.common.Optional
 import cpw.mods.fml.common.Optional.Method
 import cpw.mods.fml.common.eventhandler.SubscribeEvent
 import cpw.mods.fml.relauncher.{Side, SideOnly}
 import li.cil.oc._
 import li.cil.oc.api.Network
 import li.cil.oc.api.network._
 import li.cil.oc.client.Sound
 import li.cil.oc.common.Tier
 import li.cil.oc.server.{component, driver, PacketSender => ServerPacketSender}
 import li.cil.oc.util.ExtendedNBT._
 import li.cil.oc.util.mods.{Mods, Waila}
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.item.ItemStack
 import net.minecraft.nbt.{NBTTagCompound, NBTTagString}
 import net.minecraftforge.common.util.Constants.NBT
 import net.minecraftforge.common.util.ForgeDirection
 import net.minecraftforge.event.world.WorldEvent
 import stargatetech2.api.bus.IBusDevice

 import scala.collection.mutable

 // See AbstractBusAware as to why we have to define the IBusDevice here.
 @Optional.Interface(iface = "stargatetech2.api.bus.IBusDevice", modid = Mods.IDs.StargateTech2)
 class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerBalancer with traits.Inventory with traits.Rotatable with traits.BundledRedstoneAware with traits.AbstractBusAware with Analyzable with IBusDevice {
   val servers = Array.fill(getSizeInventory)(None: Option[component.Server])

   val sides = Seq(ForgeDirection.UP, ForgeDirection.EAST, ForgeDirection.WEST, ForgeDirection.DOWN).
     padTo(servers.length, ForgeDirection.UNKNOWN).toArray

   val terminals = (0 until servers.length).map(new common.component.Terminal(this, _)).toArray

   var range = 16

   // For client side, where we don't create the component.
   private val _isRunning = new Array[Boolean](getSizeInventory)

   private var hasChanged = false

   var internalSwitch = false

   // For client side rendering.
   var isPresent = Array.fill[Option[String]](getSizeInventory)(None)

   @SideOnly(Side.CLIENT)
   override protected def hasConnector(side: ForgeDirection) = side != facing

   override protected def connector(side: ForgeDirection) = Option(if (side != facing) sidedNode(side).asInstanceOf[Connector] else null)

   override def getWorld = world

   // ----------------------------------------------------------------------- //

   override def canConnect(side: ForgeDirection) = side != facing

   @Method(modid = Mods.IDs.StargateTech2)
   override def getInterfaces(side: Int) = if (side != facing.ordinal) {
     super.getInterfaces(side)
   }
   else null

   // ----------------------------------------------------------------------- //

   def isRunning(number: Int) =
     if (isServer) servers(number).fold(false)(_.machine.isRunning)
     else _isRunning(number)

   @SideOnly(Side.CLIENT)
   def setRunning(number: Int, value: Boolean) = {
     _isRunning(number) = value
     world.markBlockForUpdate(x, y, z)
     if (anyRunning) Sound.startLoop(this, "computer_running", 1.5f, 50 + world.rand.nextInt(50))
     else Sound.stopLoop(this)
     this
   }

   def anyRunning = (0 until servers.length).exists(isRunning)

   // ----------------------------------------------------------------------- //

   def markAsChanged() = hasChanged = true

   override def installedComponents = servers.flatMap {
     case Some(server) => server.inventory.components collect {
       case Some(component) => component
     }
     case _ => Iterable.empty
   }

   def hasAbstractBusCard = servers exists {
     case Some(server) => server.machine.isRunning && server.inventory.items.exists {
       case Some(stack) => driver.item.AbstractBusCard.worksWith(stack)
       case _ => false
     }
     case _ => false
   }

   def hasRedstoneCard = servers exists {
     case Some(server) => server.machine.isRunning && server.inventory.items.exists {
       case Some(stack) => driver.item.RedstoneCard.worksWith(stack)
       case _ => false
     }
     case _ => false
   }

   def reconnectServer(number: Int, server: component.Server) {
     val serverSide = sides(number)
     val serverNode = server.machine.node
     for (side <- ForgeDirection.VALID_DIRECTIONS) {
       if (toGlobal(serverSide) == side) sidedNode(side).connect(serverNode)
       else sidedNode(side).disconnect(serverNode)
     }
   }

   // ----------------------------------------------------------------------- //

   override protected def distribute() = {
     def node(side: Int) = if (sides(side) == ForgeDirection.UNKNOWN) servers(side).fold(null: Connector)(_.node.asInstanceOf[Connector]) else null
     val nodes = (0 to 3).map(node)
     def network(connector: Connector) = if (connector != null && connector.network != null) connector.network else this
     val (sumBuffer, sumSize) = super.distribute()
     var sumBufferServers, sumSizeServers = 0.0
     network(nodes(0)).synchronized {
       network(nodes(1)).synchronized {
         network(nodes(2)).synchronized {
           network(nodes(3)).synchronized {
             for (node <- nodes if node != null) {
               sumBufferServers += node.globalBuffer
               sumSizeServers += node.globalBufferSize
             }
             if (sumSize + sumSizeServers > 0) {
               val ratio = (sumBuffer + sumBufferServers) / (sumSize + sumSizeServers)
               for (node <- nodes if node != null) {
                 node.changeBuffer(node.globalBufferSize * ratio - node.globalBuffer)
               }
             }
           }
         }
       }
     }
     (sumBuffer + sumBufferServers, sumSize + sumSizeServers)
   }

   // ----------------------------------------------------------------------- //

   override protected def relayPacket(sourceSide: ForgeDirection, packet: Packet) {
     if (internalSwitch) {
       for (slot <- 0 until servers.length) {
         val side = toGlobal(sides(slot))
         if (side != sourceSide) {
           servers(slot) match {
             case Some(server) => server.node.sendToNeighbors("network.message", packet)
             case _ =>
           }
         }
       }
     }
     else super.relayPacket(sourceSide, packet)
   }

   override protected def onPlugMessage(plug: Plug, message: Message) {
     // This check is a little hacky. Basically what we test here is whether
     // the message was relayed internally, because only internally relayed
     // network messages originate from the actual server nodes themselves.
     // The otherwise come from the network card.
     if (message.name != "network.message" || !(servers collect {
       case Some(server) => server.node
     }).contains(message.source)) super.onPlugMessage(plug, message)
   }

   // ----------------------------------------------------------------------- //

   override def getSizeInventory = 4

   override def getInventoryStackLimit = 1

   override def isItemValidForSlot(i: Int, stack: ItemStack) = {
     val descriptor = api.Items.get(stack)
     descriptor == api.Items.get("server1") ||
       descriptor == api.Items.get("server2") ||
       descriptor == api.Items.get("server3") ||
       descriptor == api.Items.get("serverCreative")
   }

   // ----------------------------------------------------------------------- //

   override def onAnalyze(player: EntityPlayer, side: Int, hitX: Float, hitY: Float, hitZ: Float) = {
     if (side == facing.ordinal) {
       val l = 2 / 16.0
       val h = 14 / 16.0
       val slot = (((1 - hitY) - l) / (h - l) * 4).toInt
       if (slot >= 0 && slot <= 3 && servers(slot).isDefined) {
         val computer = servers(slot).get.machine
         computer.lastError match {
           case value if value != null =>
             player.addChatMessage(Localization.Analyzer.LastError(value))
           case _ =>
         }
         player.addChatMessage(Localization.Analyzer.Components(computer.componentCount, servers(slot).get.maxComponents))
         val list = computer.users
         if (list.size > 0) {
           player.addChatMessage(Localization.Analyzer.Users(list))
         }
         Array(computer.node)
       }
       else null
     }
     else Array(sidedNode(ForgeDirection.getOrientation(side)))
   }

   // ----------------------------------------------------------------------- //

   override def canUpdate = isServer

   override def updateEntity() {
     super.updateEntity()
     if (isServer && isConnected) {
       if (range > 0 && !Settings.get.ignorePower && anyRunning) {
         val running = servers.count {
           case Some(server) => server.machine.isRunning
           case _ => false
         }
         var cost = -(running * range * Settings.get.wirelessCostPerRange)
         for (side <- ForgeDirection.VALID_DIRECTIONS if cost < 0) {
           sidedNode(side) match {
             case connector: Connector => cost = connector.changeBuffer(cost)
             case _ =>
           }
         }
       }

       servers collect {
         case Some(server) =>
           if (server.tier == Tier.Four && world.getTotalWorldTime % Settings.get.tickFrequency == 0) {
             server.node.asInstanceOf[Connector].changeBuffer(Double.PositiveInfinity)
           }
           server.machine.update()
       }

       if (hasChanged) {
         hasChanged = false
         world.markTileEntityChunkModified(x, y, z, this)
       }

       for (i <- 0 until servers.length) {
         val isRunning = servers(i).fold(false)(_.machine.isRunning)
         if (_isRunning(i) != isRunning) {
           _isRunning(i) = isRunning
           ServerPacketSender.sendServerState(this, i)
         }
       }
       isOutputEnabled = hasRedstoneCard
       isAbstractBusAvailable = hasAbstractBusCard

       servers collect {
         case Some(server) =>
           server.inventory.updateComponents()
           terminals(server.number).buffer.update()
       }
     }
   }

   // ----------------------------------------------------------------------- //

   override protected def initialize() {
     super.initialize()
     if (isClient) {
       ServerRack.list += this -> Unit
     }
   }

   override def dispose() {
     super.dispose()
     if (isClient) {
       ServerRack.list -= this
     }
   }

   override def readFromNBT(nbt: NBTTagCompound) {
     super.readFromNBT(nbt)
     for (slot <- 0 until getSizeInventory) {
       if (getStackInSlot(slot) != null) {
         servers(slot) = Some(new component.Server(this, slot))
       }
     }
     nbt.getTagList(Settings.namespace + "servers", NBT.TAG_COMPOUND).foreach((list, index) =>
       if (index < servers.length) servers(index) match {
         case Some(server) => try server.load(list.getCompoundTagAt(index)) catch {
           case t: Throwable => OpenComputers.log.warn("Failed restoring server state. Please report this!", t)
         }
         case _ =>
       })
     val sidesNbt = nbt.getByteArray(Settings.namespace + "sides").map(ForgeDirection.getOrientation(_))
     Array.copy(sidesNbt, 0, sides, 0, math.min(sidesNbt.length, sides.length))
     nbt.getTagList(Settings.namespace + "terminals", NBT.TAG_COMPOUND).
       foreach((list, index) => if (index < terminals.length) try terminals(index).load(list.getCompoundTagAt(index)) catch {
       case t: Throwable => OpenComputers.log.warn("Failed restoring terminal state. Please report this!", t)
     })
     range = nbt.getInteger(Settings.namespace + "range")
     internalSwitch = nbt.getBoolean(Settings.namespace + "internalSwitch")
   }

   // Side check for Waila (and other mods that may call this client side).
   override def writeToNBT(nbt: NBTTagCompound) = if (isServer) {
     if (!Mods.Waila.isAvailable || !Waila.isSavingForTooltip) {
       nbt.setNewTagList(Settings.namespace + "servers", servers map {
         case Some(server) =>
           val serverNbt = new NBTTagCompound()
           try server.save(serverNbt) catch {
             case t: Throwable => OpenComputers.log.warn("Failed saving server state. Please report this!", t)
           }
           serverNbt
         case _ => new NBTTagCompound()
       })
     }
     super.writeToNBT(nbt)
     nbt.setByteArray(Settings.namespace + "sides", sides.map(_.ordinal.toByte))
     nbt.setNewTagList(Settings.namespace + "terminals", terminals.map(t => {
       val terminalNbt = new NBTTagCompound()
       try t.save(terminalNbt) catch {
         case t: Throwable => OpenComputers.log.warn("Failed saving terminal state. Please report this!", t)
       }
       terminalNbt
     }))
     nbt.setInteger(Settings.namespace + "range", range)
     nbt.setBoolean(Settings.namespace + "internalSwitch", internalSwitch)
   }

   @SideOnly(Side.CLIENT)
   override def readFromNBTForClient(nbt: NBTTagCompound) {
     super.readFromNBTForClient(nbt)
     val isRunningNbt = nbt.getByteArray("isServerRunning").map(_ == 1)
     Array.copy(isRunningNbt, 0, _isRunning, 0, math.min(isRunningNbt.length, _isRunning.length))
     val isPresentNbt = nbt.getTagList("isPresent", NBT.TAG_STRING).map((list, index) => {
       val value = list.getStringTagAt(index)
       if (Strings.isNullOrEmpty(value)) None else Some(value)
     }).toArray
     Array.copy(isPresentNbt, 0, isPresent, 0, math.min(isPresentNbt.length, isPresent.length))
     val sidesNbt = nbt.getByteArray("sides").map(ForgeDirection.getOrientation(_))
     Array.copy(sidesNbt, 0, sides, 0, math.min(sidesNbt.length, sides.length))
     nbt.getTagList("terminals", NBT.TAG_COMPOUND).
       foreach((list, index) => if (index < terminals.length) terminals(index).readFromNBTForClient(list.getCompoundTagAt(index)))
     range = nbt.getInteger("range")
     if (anyRunning) Sound.startLoop(this, "computer_running", 1.5f, 1000 + world.rand.nextInt(2000))
   }

   override def writeToNBTForClient(nbt: NBTTagCompound) {
     super.writeToNBTForClient(nbt)
     nbt.setByteArray("isServerRunning", _isRunning.map(value => (if (value) 1 else 0).toByte))
     nbt.setNewTagList("isPresent", servers.map(value => new NBTTagString(value.fold("")(_.machine.node.address))))
     nbt.setByteArray("sides", sides.map(_.ordinal.toByte))
     nbt.setNewTagList("terminals", terminals.map(t => {
       val terminalNbt = new NBTTagCompound()
       t.writeToNBTForClient(terminalNbt)
       terminalNbt
     }))
     nbt.setInteger("range", range)
   }

   // ----------------------------------------------------------------------- //

   override protected def onPlugConnect(plug: Plug, node: Node) {
     if (node == plug.node) {
       for (number <- 0 until servers.length) {
         val serverSide = sides(number)
         servers(number) match {
           case Some(server) =>
             if (toGlobal(serverSide) == plug.side) plug.node.connect(server.machine.node)
             else api.Network.joinNewNetwork(server.machine.node)
             terminals(number).connect(server.machine.node)
           case _ =>
         }
       }
     }
   }

   override protected def createNode(plug: Plug) = api.Network.newNode(plug, Visibility.Network).
     withConnector(Settings.get.bufferDistributor).
     create()

   override protected def onItemAdded(slot: Int, stack: ItemStack) {
     super.onItemAdded(slot, stack)
     if (isServer) {
       val server = new component.Server(this, slot)
       servers(slot) = Some(server)
       reconnectServer(slot, server)
       Network.joinNewNetwork(server.machine.node)
       terminals(slot).connect(server.machine.node)
     }
   }

   override protected def onItemRemoved(slot: Int, stack: ItemStack) {
     super.onItemRemoved(slot, stack)
     if (isServer) {
       servers(slot) match {
         case Some(server) =>
           server.machine.node.remove()
           server.inventory.containerOverride = stack
           server.inventory.save(new NBTTagCompound()) // Only flush components.
           server.inventory.markDirty()
         case _ =>
       }
       servers(slot) = None
       terminals(slot).keys.clear()
     }
   }

   override def markDirty() {
     super.markDirty()
     if (isServer) {
       isOutputEnabled = hasRedstoneCard
       isAbstractBusAvailable = hasAbstractBusCard
       ServerPacketSender.sendServerPresence(this)
     }
     else {
       world.markBlockForUpdate(x, y, z)
     }
   }

   override protected def onRotationChanged() {
     super.onRotationChanged()
     checkRedstoneInputChanged()
   }

   override protected def onRedstoneInputChanged(side: ForgeDirection) {
     super.onRedstoneInputChanged(side)
     servers collect {
       case Some(server) => server.machine.signal("redstone_changed", server.machine.node.address, Int.box(toLocal(side).ordinal()))
     }
   }

   override def rotate(axis: ForgeDirection) = false
 }

 object ServerRack {
   val list = mutable.WeakHashMap.empty[ServerRack, Unit]

   @SubscribeEvent
   def onWorldUnload(e: WorldEvent.Unload) {
     if (e.world.isRemote) {
       list.clear()
     }
   }
 }
	package li.cil.oc.common.tileentity

	import com.google.common.base.Strings
	import cpw.mods.fml.common.Optional
	import cpw.mods.fml.common.Optional.Method
	import cpw.mods.fml.common.eventhandler.SubscribeEvent
	import cpw.mods.fml.relauncher.{Side, SideOnly}
	import li.cil.oc._
	import li.cil.oc.api.Network
	import li.cil.oc.api.network._
	import li.cil.oc.client.Sound
	import li.cil.oc.common.Tier
	import li.cil.oc.server.{component, driver, PacketSender => ServerPacketSender}
	import li.cil.oc.util.ExtendedNBT._
	import li.cil.oc.util.mods.{Mods, Waila}
	import net.minecraft.entity.player.EntityPlayer
	import net.minecraft.item.ItemStack
	import net.minecraft.nbt.{NBTTagCompound, NBTTagString}
	import net.minecraftforge.common.util.Constants.NBT
	import net.minecraftforge.common.util.ForgeDirection
	import net.minecraftforge.event.world.WorldEvent
	import stargatetech2.api.bus.IBusDevice

	import scala.collection.mutable

	// See AbstractBusAware as to why we have to define the IBusDevice here.
	@Optional.Interface(iface = "stargatetech2.api.bus.IBusDevice", modid = Mods.IDs.StargateTech2)
	class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerBalancer with traits.Inventory with traits.Rotatable with traits.BundledRedstoneAware with traits.AbstractBusAware with Analyzable with IBusDevice {
	val servers = Array.fill(getSizeInventory)(None: Option[component.Server])

	val sides = Seq(ForgeDirection.UP, ForgeDirection.EAST, ForgeDirection.WEST, ForgeDirection.DOWN).
	padTo(servers.length, ForgeDirection.UNKNOWN).toArray

	val terminals = (0 until servers.length).map(new common.component.Terminal(this, _)).toArray

	var range = 16

	// For client side, where we don't create the component.
	private val _isRunning = new Array[Boolean](getSizeInventory)

	private var hasChanged = false

	var internalSwitch = false

	// For client side rendering.
	var isPresent = Array.fill[Option[String]](getSizeInventory)(None)

	@SideOnly(Side.CLIENT)
	override protected def hasConnector(side: ForgeDirection) = side != facing

	override protected def connector(side: ForgeDirection) = Option(if (side != facing) sidedNode(side).asInstanceOf[Connector] else null)

	override def getWorld = world

	// ----------------------------------------------------------------------- //

	override def canConnect(side: ForgeDirection) = side != facing

	@Method(modid = Mods.IDs.StargateTech2)
	override def getInterfaces(side: Int) = if (side != facing.ordinal) {
	super.getInterfaces(side)
	}
	else null

	// ----------------------------------------------------------------------- //

	def isRunning(number: Int) =
	if (isServer) servers(number).fold(false)(_.machine.isRunning)
	else _isRunning(number)

	@SideOnly(Side.CLIENT)
	def setRunning(number: Int, value: Boolean) = {
	_isRunning(number) = value
	world.markBlockForUpdate(x, y, z)
	if (anyRunning) Sound.startLoop(this, "computer_running", 1.5f, 50 + world.rand.nextInt(50))
	else Sound.stopLoop(this)
	this
	}

	def anyRunning = (0 until servers.length).exists(isRunning)

	// ----------------------------------------------------------------------- //

	def markAsChanged() = hasChanged = true

	override def installedComponents = servers.flatMap {
	case Some(server) => server.inventory.components collect {
	case Some(component) => component
	}
	case _ => Iterable.empty
	}

	def hasAbstractBusCard = servers exists {
	case Some(server) => server.machine.isRunning && server.inventory.items.exists {
	case Some(stack) => driver.item.AbstractBusCard.worksWith(stack)
	case _ => false
	}
	case _ => false
	}

	def hasRedstoneCard = servers exists {
	case Some(server) => server.machine.isRunning && server.inventory.items.exists {
	case Some(stack) => driver.item.RedstoneCard.worksWith(stack)
	case _ => false
	}
	case _ => false
	}

	def reconnectServer(number: Int, server: component.Server) {
	val serverSide = sides(number)
	val serverNode = server.machine.node
	for (side <- ForgeDirection.VALID_DIRECTIONS) {
	if (toGlobal(serverSide) == side) sidedNode(side).connect(serverNode)
	else sidedNode(side).disconnect(serverNode)
	}
	}

	// ----------------------------------------------------------------------- //

	override protected def distribute() = {
	def node(side: Int) = if (sides(side) == ForgeDirection.UNKNOWN) servers(side).fold(null: Connector)(_.node.asInstanceOf[Connector]) else null
	val nodes = (0 to 3).map(node)
	def network(connector: Connector) = if (connector != null && connector.network != null) connector.network else this
	val (sumBuffer, sumSize) = super.distribute()
	var sumBufferServers, sumSizeServers = 0.0
	network(nodes(0)).synchronized {
	network(nodes(1)).synchronized {
	network(nodes(2)).synchronized {
	network(nodes(3)).synchronized {
	for (node <- nodes if node != null) {
	sumBufferServers += node.globalBuffer
	sumSizeServers += node.globalBufferSize
	}
	if (sumSize + sumSizeServers > 0) {
	val ratio = (sumBuffer + sumBufferServers) / (sumSize + sumSizeServers)
	for (node <- nodes if node != null) {
	node.changeBuffer(node.globalBufferSize * ratio - node.globalBuffer)
	}
	}
	}
	}
	}
	}
	(sumBuffer + sumBufferServers, sumSize + sumSizeServers)
	}

	// ----------------------------------------------------------------------- //

	override protected def relayPacket(sourceSide: ForgeDirection, packet: Packet) {
	if (internalSwitch) {
	for (slot <- 0 until servers.length) {
	val side = toGlobal(sides(slot))
	if (side != sourceSide) {
	servers(slot) match {
	case Some(server) => server.node.sendToNeighbors("network.message", packet)
	case _ =>
	}
	}
	}
	}
	else super.relayPacket(sourceSide, packet)
	}

	override protected def onPlugMessage(plug: Plug, message: Message) {
	// This check is a little hacky. Basically what we test here is whether
	// the message was relayed internally, because only internally relayed
	// network messages originate from the actual server nodes themselves.
	// The otherwise come from the network card.
	if (message.name != "network.message" \|\| !(servers collect {
	case Some(server) => server.node
	}).contains(message.source)) super.onPlugMessage(plug, message)
	}

	// ----------------------------------------------------------------------- //

	override def getSizeInventory = 4

	override def getInventoryStackLimit = 1

	override def isItemValidForSlot(i: Int, stack: ItemStack) = {
	val descriptor = api.Items.get(stack)
	descriptor == api.Items.get("server1") \|\|
	descriptor == api.Items.get("server2") \|\|
	descriptor == api.Items.get("server3") \|\|
	descriptor == api.Items.get("serverCreative")
	}

	// ----------------------------------------------------------------------- //

	override def onAnalyze(player: EntityPlayer, side: Int, hitX: Float, hitY: Float, hitZ: Float) = {
	if (side == facing.ordinal) {
	val l = 2 / 16.0
	val h = 14 / 16.0
	val slot = (((1 - hitY) - l) / (h - l) * 4).toInt
	if (slot >= 0 && slot <= 3 && servers(slot).isDefined) {
	val computer = servers(slot).get.machine
	computer.lastError match {
	case value if value != null =>
	player.addChatMessage(Localization.Analyzer.LastError(value))
	case _ =>
	}
	player.addChatMessage(Localization.Analyzer.Components(computer.componentCount, servers(slot).get.maxComponents))
	val list = computer.users
	if (list.size > 0) {
	player.addChatMessage(Localization.Analyzer.Users(list))
	}
	Array(computer.node)
	}
	else null
	}
	else Array(sidedNode(ForgeDirection.getOrientation(side)))
	}

	// ----------------------------------------------------------------------- //

	override def canUpdate = isServer

	override def updateEntity() {
	super.updateEntity()
	if (isServer && isConnected) {
	if (range > 0 && !Settings.get.ignorePower && anyRunning) {
	val running = servers.count {
	case Some(server) => server.machine.isRunning
	case _ => false
	}
	var cost = -(running * range * Settings.get.wirelessCostPerRange)
	for (side <- ForgeDirection.VALID_DIRECTIONS if cost < 0) {
	sidedNode(side) match {
	case connector: Connector => cost = connector.changeBuffer(cost)
	case _ =>
	}
	}
	}

	servers collect {
	case Some(server) =>
	if (server.tier == Tier.Four && world.getTotalWorldTime % Settings.get.tickFrequency == 0) {
	server.node.asInstanceOf[Connector].changeBuffer(Double.PositiveInfinity)
	}
	server.machine.update()
	}

	if (hasChanged) {
	hasChanged = false
	world.markTileEntityChunkModified(x, y, z, this)
	}

	for (i <- 0 until servers.length) {
	val isRunning = servers(i).fold(false)(_.machine.isRunning)
	if (_isRunning(i) != isRunning) {
	_isRunning(i) = isRunning
	ServerPacketSender.sendServerState(this, i)
	}
	}
	isOutputEnabled = hasRedstoneCard
	isAbstractBusAvailable = hasAbstractBusCard

	servers collect {
	case Some(server) =>
	server.inventory.updateComponents()
	terminals(server.number).buffer.update()
	}
	}
	}

	// ----------------------------------------------------------------------- //

	override protected def initialize() {
	super.initialize()
	if (isClient) {
	ServerRack.list += this -> Unit
	}
	}

	override def dispose() {
	super.dispose()
	if (isClient) {
	ServerRack.list -= this
	}
	}

	override def readFromNBT(nbt: NBTTagCompound) {
	super.readFromNBT(nbt)
	for (slot <- 0 until getSizeInventory) {
	if (getStackInSlot(slot) != null) {
	servers(slot) = Some(new component.Server(this, slot))
	}
	}
	nbt.getTagList(Settings.namespace + "servers", NBT.TAG_COMPOUND).foreach((list, index) =>
	if (index < servers.length) servers(index) match {
	case Some(server) => try server.load(list.getCompoundTagAt(index)) catch {
	case t: Throwable => OpenComputers.log.warn("Failed restoring server state. Please report this!", t)
	}
	case _ =>
	})
	val sidesNbt = nbt.getByteArray(Settings.namespace + "sides").map(ForgeDirection.getOrientation(_))
	Array.copy(sidesNbt, 0, sides, 0, math.min(sidesNbt.length, sides.length))
	nbt.getTagList(Settings.namespace + "terminals", NBT.TAG_COMPOUND).
	foreach((list, index) => if (index < terminals.length) try terminals(index).load(list.getCompoundTagAt(index)) catch {
	case t: Throwable => OpenComputers.log.warn("Failed restoring terminal state. Please report this!", t)
	})
	range = nbt.getInteger(Settings.namespace + "range")
	internalSwitch = nbt.getBoolean(Settings.namespace + "internalSwitch")
	}

	// Side check for Waila (and other mods that may call this client side).
	override def writeToNBT(nbt: NBTTagCompound) = if (isServer) {
	if (!Mods.Waila.isAvailable \|\| !Waila.isSavingForTooltip) {
	nbt.setNewTagList(Settings.namespace + "servers", servers map {
	case Some(server) =>
	val serverNbt = new NBTTagCompound()
	try server.save(serverNbt) catch {
	case t: Throwable => OpenComputers.log.warn("Failed saving server state. Please report this!", t)
	}
	serverNbt
	case _ => new NBTTagCompound()
	})
	}
	super.writeToNBT(nbt)
	nbt.setByteArray(Settings.namespace + "sides", sides.map(_.ordinal.toByte))
	nbt.setNewTagList(Settings.namespace + "terminals", terminals.map(t => {
	val terminalNbt = new NBTTagCompound()
	try t.save(terminalNbt) catch {
	case t: Throwable => OpenComputers.log.warn("Failed saving terminal state. Please report this!", t)
	}
	terminalNbt
	}))
	nbt.setInteger(Settings.namespace + "range", range)
	nbt.setBoolean(Settings.namespace + "internalSwitch", internalSwitch)
	}

	@SideOnly(Side.CLIENT)
	override def readFromNBTForClient(nbt: NBTTagCompound) {
	super.readFromNBTForClient(nbt)
	val isRunningNbt = nbt.getByteArray("isServerRunning").map(_ == 1)
	Array.copy(isRunningNbt, 0, _isRunning, 0, math.min(isRunningNbt.length, _isRunning.length))
	val isPresentNbt = nbt.getTagList("isPresent", NBT.TAG_STRING).map((list, index) => {
	val value = list.getStringTagAt(index)
	if (Strings.isNullOrEmpty(value)) None else Some(value)
	}).toArray
	Array.copy(isPresentNbt, 0, isPresent, 0, math.min(isPresentNbt.length, isPresent.length))
	val sidesNbt = nbt.getByteArray("sides").map(ForgeDirection.getOrientation(_))
	Array.copy(sidesNbt, 0, sides, 0, math.min(sidesNbt.length, sides.length))
	nbt.getTagList("terminals", NBT.TAG_COMPOUND).
	foreach((list, index) => if (index < terminals.length) terminals(index).readFromNBTForClient(list.getCompoundTagAt(index)))
	range = nbt.getInteger("range")
	if (anyRunning) Sound.startLoop(this, "computer_running", 1.5f, 1000 + world.rand.nextInt(2000))
	}

	override def writeToNBTForClient(nbt: NBTTagCompound) {
	super.writeToNBTForClient(nbt)
	nbt.setByteArray("isServerRunning", _isRunning.map(value => (if (value) 1 else 0).toByte))
	nbt.setNewTagList("isPresent", servers.map(value => new NBTTagString(value.fold("")(_.machine.node.address))))
	nbt.setByteArray("sides", sides.map(_.ordinal.toByte))
	nbt.setNewTagList("terminals", terminals.map(t => {
	val terminalNbt = new NBTTagCompound()
	t.writeToNBTForClient(terminalNbt)
	terminalNbt
	}))
	nbt.setInteger("range", range)
	}

	// ----------------------------------------------------------------------- //

	override protected def onPlugConnect(plug: Plug, node: Node) {
	if (node == plug.node) {
	for (number <- 0 until servers.length) {
	val serverSide = sides(number)
	servers(number) match {
	case Some(server) =>
	if (toGlobal(serverSide) == plug.side) plug.node.connect(server.machine.node)
	else api.Network.joinNewNetwork(server.machine.node)
	terminals(number).connect(server.machine.node)
	case _ =>
	}
	}
	}
	}

	override protected def createNode(plug: Plug) = api.Network.newNode(plug, Visibility.Network).
	withConnector(Settings.get.bufferDistributor).
	create()

	override protected def onItemAdded(slot: Int, stack: ItemStack) {
	super.onItemAdded(slot, stack)
	if (isServer) {
	val server = new component.Server(this, slot)
	servers(slot) = Some(server)
	reconnectServer(slot, server)
	Network.joinNewNetwork(server.machine.node)
	terminals(slot).connect(server.machine.node)
	}
	}

	override protected def onItemRemoved(slot: Int, stack: ItemStack) {
	super.onItemRemoved(slot, stack)
	if (isServer) {
	servers(slot) match {
	case Some(server) =>
	server.machine.node.remove()
	server.inventory.containerOverride = stack
	server.inventory.save(new NBTTagCompound()) // Only flush components.
	server.inventory.markDirty()
	case _ =>
	}
	servers(slot) = None
	terminals(slot).keys.clear()
	}
	}

	override def markDirty() {
	super.markDirty()
	if (isServer) {
	isOutputEnabled = hasRedstoneCard
	isAbstractBusAvailable = hasAbstractBusCard
	ServerPacketSender.sendServerPresence(this)
	}
	else {
	world.markBlockForUpdate(x, y, z)
	}
	}

	override protected def onRotationChanged() {
	super.onRotationChanged()
	checkRedstoneInputChanged()
	}

	override protected def onRedstoneInputChanged(side: ForgeDirection) {
	super.onRedstoneInputChanged(side)
	servers collect {
	case Some(server) => server.machine.signal("redstone_changed", server.machine.node.address, Int.box(toLocal(side).ordinal()))
	}
	}

	override def rotate(axis: ForgeDirection) = false
	}

	object ServerRack {
	val list = mutable.WeakHashMap.empty[ServerRack, Unit]

	@SubscribeEvent
	def onWorldUnload(e: WorldEvent.Unload) {
	if (e.world.isRemote) {
	list.clear()
	}
	}
	}