net.minecraftforge.common
Class ForgeChunkManager

java.lang.Object
  net.minecraftforge.common.ForgeChunkManager

public class ForgeChunkManager
extends Object

Manages chunkloading for mods. The basic principle is a ticket based system. 1. Mods register a callback setForcedChunkLoadingCallback(Object, LoadingCallback) 2. Mods ask for a ticket requestTicket(Object, World, Type) and then hold on to that ticket. 3. Mods request chunks to stay loaded forceChunk(Ticket, ChunkCoordIntPair) or remove chunks from force loading unforceChunk(Ticket, ChunkCoordIntPair). 4. When a world unloads, the tickets associated with that world are saved by the chunk manager. 5. When a world loads, saved tickets are offered to the mods associated with the tickets. The ForgeChunkManager.Ticket.getModData() that is set by the mod should be used to re-register chunks to stay loaded (and maybe take other actions). The chunkloading is configurable at runtime. The file "config/forgeChunkLoading.cfg" contains both default configuration for chunkloading, and a sample individual mod specific override section.

Author:

cpw

Nested Class Summary

static class	ForgeChunkManager.ForceChunkEvent
static interface	ForgeChunkManager.LoadingCallback All mods requiring chunkloading need to implement this to handle the re-registration of chunk tickets at world loading time
static interface	ForgeChunkManager.OrderedLoadingCallback This is a special LoadingCallback that can be implemented as well as the LoadingCallback to provide access to additional behaviour.
static interface	ForgeChunkManager.PlayerOrderedLoadingCallback
static class	ForgeChunkManager.Ticket
static class	ForgeChunkManager.Type
static class	ForgeChunkManager.UnforceChunkEvent

Constructor Summary

ForgeChunkManager()

Method Summary

static void	addConfigProperty(Object mod, String propertyName, String value, Property.Type type)
static Chunk	fetchDormantChunk(long coords, World world)
static void	forceChunk(ForgeChunkManager.Ticket ticket, ChunkCoordIntPair chunk) Force the supplied chunk coordinate to be loaded by the supplied ticket.
static Map<String,Property>	getConfigMapFor(Object mod)
static int	getMaxChunkDepthFor(String modId)
static int	getMaxTicketLengthFor(String modId)
static com.google.common.collect.ImmutableSetMultimap<ChunkCoordIntPair,ForgeChunkManager.Ticket>	getPersistentChunksFor(World world) The list of persistent chunks in the world.
static void	putDormantChunk(long coords, Chunk chunk)
static void	releaseTicket(ForgeChunkManager.Ticket ticket) Release the ticket back to the system.
static void	reorderChunk(ForgeChunkManager.Ticket ticket, ChunkCoordIntPair chunk) Reorganize the internal chunk list so that the chunk supplied is at the *end* of the list This helps if you wish to guarantee a certain "automatic unload ordering" for the chunks in the ticket list
static ForgeChunkManager.Ticket	requestPlayerTicket(Object mod, String player, World world, ForgeChunkManager.Type type)
static ForgeChunkManager.Ticket	requestTicket(Object mod, World world, ForgeChunkManager.Type type) Request a chunkloading ticket of the appropriate type for the supplied mod
static boolean	savedWorldHasForcedChunkTickets(File chunkDir) Allows dynamically loading world mods to test if there are chunk tickets in the world Mods that add dynamically generated worlds (like Mystcraft) should call this method to determine if the world should be loaded during server starting.
static void	setForcedChunkLoadingCallback(Object mod, ForgeChunkManager.LoadingCallback callback) Set a chunkloading callback for the supplied mod object
static int	ticketCountAvailableFor(Object mod, World world) Discover the available tickets for the mod in the world
static int	ticketCountAvailableFor(String username)
static void	unforceChunk(ForgeChunkManager.Ticket ticket, ChunkCoordIntPair chunk) Unforce the supplied chunk, allowing it to be unloaded and stop ticking.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ForgeChunkManager

public ForgeChunkManager()

Method Detail

savedWorldHasForcedChunkTickets

public static boolean savedWorldHasForcedChunkTickets(File chunkDir)

Allows dynamically loading world mods to test if there are chunk tickets in the world Mods that add dynamically generated worlds (like Mystcraft) should call this method to determine if the world should be loaded during server starting.

Parameters:

chunkDir - The chunk directory to test: should be equivalent to WorldServer.getChunkSaveLocation()

Returns:

if there are tickets outstanding for this world or not

setForcedChunkLoadingCallback

public static void setForcedChunkLoadingCallback(Object mod,
                                                 ForgeChunkManager.LoadingCallback callback)

Set a chunkloading callback for the supplied mod object

Parameters:

mod - The mod instance registering the callback

callback - The code to call back when forced chunks are loaded

ticketCountAvailableFor

public static int ticketCountAvailableFor(Object mod,
                                          World world)

Discover the available tickets for the mod in the world

Parameters:

mod - The mod that will own the tickets

world - The world

Returns:

The count of tickets left for the mod in the supplied world

getMaxTicketLengthFor

public static int getMaxTicketLengthFor(String modId)

getMaxChunkDepthFor

public static int getMaxChunkDepthFor(String modId)

ticketCountAvailableFor

public static int ticketCountAvailableFor(String username)

requestPlayerTicket

public static ForgeChunkManager.Ticket requestPlayerTicket(Object mod,
                                                           String player,
                                                           World world,
                                                           ForgeChunkManager.Type type)

requestTicket

public static ForgeChunkManager.Ticket requestTicket(Object mod,
                                                     World world,
                                                     ForgeChunkManager.Type type)

Request a chunkloading ticket of the appropriate type for the supplied mod

Parameters:

mod - The mod requesting a ticket

world - The world in which it is requesting the ticket

type - The type of ticket

Returns:

A ticket with which to register chunks for loading, or null if no further tickets are available

releaseTicket

public static void releaseTicket(ForgeChunkManager.Ticket ticket)

Release the ticket back to the system. This will also unforce any chunks held by the ticket so that they can be unloaded and/or stop ticking.

Parameters:

ticket - The ticket to release

forceChunk

public static void forceChunk(ForgeChunkManager.Ticket ticket,
                              ChunkCoordIntPair chunk)

Force the supplied chunk coordinate to be loaded by the supplied ticket. If the ticket's ForgeChunkManager.Ticket.maxDepth is exceeded, the least recently registered chunk is unforced and may be unloaded. It is safe to force the chunk several times for a ticket, it will not generate duplication or change the ordering.

Parameters:

ticket - The ticket registering the chunk

chunk - The chunk to force

reorderChunk

public static void reorderChunk(ForgeChunkManager.Ticket ticket,
                                ChunkCoordIntPair chunk)

Reorganize the internal chunk list so that the chunk supplied is at the *end* of the list This helps if you wish to guarantee a certain "automatic unload ordering" for the chunks in the ticket list

Parameters:

ticket - The ticket holding the chunk list

chunk - The chunk you wish to push to the end (so that it would be unloaded last)

unforceChunk

public static void unforceChunk(ForgeChunkManager.Ticket ticket,
                                ChunkCoordIntPair chunk)

Unforce the supplied chunk, allowing it to be unloaded and stop ticking.

Parameters:

ticket - The ticket holding the chunk

chunk - The chunk to unforce

getPersistentChunksFor

public static com.google.common.collect.ImmutableSetMultimap<ChunkCoordIntPair,ForgeChunkManager.Ticket> getPersistentChunksFor(World world)

The list of persistent chunks in the world. This set is immutable.

Parameters:

world -

Returns:

putDormantChunk

public static void putDormantChunk(long coords,
                                   Chunk chunk)

fetchDormantChunk

public static Chunk fetchDormantChunk(long coords,
                                      World world)

getConfigMapFor

public static Map<String,Property> getConfigMapFor(Object mod)

addConfigProperty

public static void addConfigProperty(Object mod,
                                     String propertyName,
                                     String value,
                                     Property.Type type)