Diagram lanes

Generated from TEMPLATE.md’s lane key by python tools/check_lanes.py --index. Do not edit by hand.

Almost every lane in a sequence diagram is a class, and a lane means the same thing on every page: the key in TEMPLATE.md is the authority, and check_lanes.py fails a deploy on a page that disagrees with it. The last rows are the exceptions — lanes that stand for a thread, the process, the wire, the disk, a service or the game’s own code rather than for one class.

273 lanes are classes and 10 are not. A lane is normally the initials of the class’s CamelCase words, a trailing Impl dropped (ServerGamePacketListenerImpl is SGPL), but more than a third are not: a short one-word class is its own lane (Player, Sheep), a longer one-word class takes a fixed prefix (Connection is Conn, Enchantment is Ench), and a collision is resolved by lengthening the later claimant, never by reassigning a row — which is why ChestMenu is ChestM and not CM (ChunkMap had it first); and a class a page draws twice, as two copies, has a second lane; and a few follow none of these (MC is Minecraft, PDM is PatchedDataComponentMap). Derive nothing from a lane; read it off this table.

lane	class
`AA`	`AbstractArrow`
`AB`	`AbstractBoat`
`ACM`	`AbstractContainerMenu`
`AFBE`	`AbstractFurnaceBlockEntity`
`AP`	`AcquirePoi`
`ATS`	`AttributeTrackSampler`
`AttrI`	`AttributeInstance`
`AttrM`	`AttributeMap`
`BC`	`BuildContexts`
`BD`	`BlendingData`
`BDFS`	`BlendDensityFunction.Sampler`
`BDR`	`BrainDebugRenderer`
`BERD`	`BlockEntityRenderDispatcher`
`BI`	`BucketItem`
`BIR`	`BuiltInRegistries`
`BLE`	`BlockLightEngine`
`Blender`	`Blender`
`Block`	`Block`
`Boot`	`Bootstrap`
`Brain`	`Brain`
`BSPH`	`BlockStatePredictionHandler`
`CA`	`ChunkAccess`
`CAdv`	`ClientAdvancements`
`Camera`	`Camera`
`CBE`	`ChestBlockEntity`
`CCC`	`ClientChunkCache`
`CComPL`	`ClientCommonPacketListenerImpl`
`CCPL`	`ClientConfigurationPacketListenerImpl`
`CDS`	`ClientDebugSubscriber`
`CE`	`CommandEncoder`
`CEM`	`EnchantmentMenu`
`CGT`	`ChunkGenerationTask`
`CH`	`ChunkHolder`
`ChanA`	`ChannelAccess`
`ChatC`	`ChatComponent`
`CHelp`	`ContainerHelper`
`ChestM`	`ChestMenu`
`ChestR`	`ChestRenderer`
`CHPL`	`ClientHandshakePacketListenerImpl`
`ChunkG`	`ChunkGenerator`
`CL`	`ClientLevel`
`ClimS`	`Climate.Sampler`
`CLis`	`ChatListener`
`CM`	`ChunkMap`
`CMap`	`ContextMap`
`Cmds`	`Commands`
`CMTE`	`ChunkMap.TrackedEntity`
`CNU`	`CollectingNeighborUpdater`
`Conn`	`Connection`
`Cons`	`Consumable`
`CPL`	`ClientPacketListener`
`CPList`	`Climate.ParameterList`
`CraftM`	`CraftingMenu`
`CRU`	`ComponentRenderUtils`
`CScr`	`ChatScreen`
`CSED`	`SynchedEntityData`
`CSP`	`ClientSuggestionProvider`
`CST`	`ChunkStatusTasks`
`CSug`	`CommandSuggestions`
`CT`	`CombatTracker`
`CTD`	`ChunkTaskDispatcher`
`CWS`	`CreateWorldScreen`
`DataC`	`DataCommands`
`DB`	`DoorBlock`
`DCP`	`DataComponentPatch`
`DCS`	`DialogControlSet`
`DlgC`	`DialogCommand`
`DlgS`	`DialogScreen`
`DM`	`DistanceManager`
`DMR`	`DefaultedMappedRegistry`
`DRWE`	`DefaultRedstoneWireEvaluator`
`DS`	`DedicatedServer`
`DScr`	`DeathScreen`
`EAP`	`EnvironmentAttributeProbe`
`EAS`	`EnvironmentAttributeSystem`
`EffC`	`EffectCommands`
`EH`	`EnchantmentHelper`
`EM`	`EnchantmentMenu`
`Ench`	`Enchantment`
`Entity`	`Entity`
`ERD`	`EntityRenderDispatcher`
`EScr`	`EnchantmentScreen`
`ET`	`EntityType`
`ETL`	`EntityTickList`
`EVS`	`EnvironmentAttributeSystem.ValueSampler`
`ExecC`	`ExecuteCommand`
`FBR`	`FormattedBidiReorder`
`FD`	`FoodData`
`FeatP`	`FeaturePlacer`
`Feature`	`Feature`
`FF`	`FlowingFluid`
`FGB`	`FrameGraphBuilder`
`FM`	`FurnaceMenu`
`FolP`	`FoliagePlacer`
`Font`	`Font`
`FP`	`FoodProperties`
`FPHAI`	`FirstPersonHandsAndItems`
`FPHAIR`	`FirstPersonHandsAndItemsRenderer`
`FR`	`FogRenderer`
`FRD`	`FeatureRenderDispatcher`
`FSet`	`FontSet`
`GC`	`GiveCommand`
`GD`	`GpuDevice`
`GGE`	`GuiGraphicsExtractor`
`GI`	`GameTestInfo`
`GlCE`	`GlCommandEncoder`
`GlRP`	`GlRenderPass`
`GpuS`	`GpuSurface`
`GR`	`GameRenderer`
`GS`	`GaussianSampler`
`GStit`	`GlyphStitcher`
`GTR`	`GameTestRunner`
`GTT`	`GameTestTicker`
`Gui`	`Gui`
`GuiR`	`GuiRenderer`
`Hud`	`Hud`
`ICT`	`InventoryChangeTrigger`
`Ignite`	`Ignite`
`InvS`	`InventoryScreen`
`IOW`	`IOWorker`
`IP`	`ItemParser`
`IS`	`IntegratedServer`
`IStack`	`ItemStack`
`Item`	`Item`
`Items`	`Items`
`JP`	`JigsawPlacement`
`JPP`	`JigsawPlacement.Placer`
`JS`	`JigsawStructure`
`KH`	`KeyboardHandler`
`KI`	`KeyboardInput`
`KM`	`KeyMapping`
`KTS`	`KeyframeTrackSampler`
`Language`	`Language`
`LB`	`LiquidBlock`
`LC`	`LevelChunk`
`LCS`	`LevelChunkSection`
`LCTs`	`LevelChunkTicks`
`LDS`	`LevelDebugSynchronizers`
`LE`	`LivingEntity`
`LevB`	`LeverBlock`
`Library`	`Library`
`LIC`	`LootItemCondition`
`LIF`	`LootItemFunctions`
`LLE`	`LevelLightEngine`
`LLSS`	`LayerLightSectionStorage`
`LM`	`Lightmap`
`LO`	`LoadingOverlay`
`LootC`	`LootContext`
`LootP`	`LootParams`
`LP`	`LocalPlayer`
`LR`	`LevelRenderer`
`LRSE`	`LightmapRenderStateExtractor`
`LSA`	`LevelStorageSource.LevelStorageAccess`
`LT`	`LootTable`
`LTs`	`LevelTicks`
`LX`	`LevelExtractor`
`MC`	`Minecraft`
`ME`	`MobEffect`
`MEI`	`MobEffectInstance`
`MFR`	`ModelFeatureRenderer`
`MNBS`	`MultiNoiseBiomeSource`
`Mob`	`Mob`
`MoveC`	`MoveControl`
`MPGM`	`MultiPlayerGameMode`
`MR`	`MappedRegistry`
`MS`	`MinecraftServer`
`MTS`	`MoveToTargetSink`
`NBC`	`NoiseBasedChunkGenerator`
`NbtIo`	`NbtIo`
`NC`	`NoiseChunk`
`NE`	`NodeEvaluator`
`PA`	`PlayerAdvancements`
`Parrot`	`Parrot`
`PBB`	`PistonBaseBlock`
`PChain`	`PostChain`
`PCS`	`PlayerChunkSender`
`PDec`	`PacketDecoder`
`PDM`	`PatchedDataComponentMap`
`PDS`	`PlayerDataStorage`
`PEnc`	`PacketEncoder`
`PESM`	`PersistentEntitySectionManager`
`PESP`	`PoolElementStructurePiece`
`PF`	`PathFinder`
`PL`	`PlayerList`
`Player`	`Player`
`PM`	`PoiManager`
`PMBE`	`PistonMovingBlockEntity`
`PMod`	`PlacementModifier`
`PN`	`PathNavigation`
`PNR`	`PathNavigationRegion`
`PP`	`PacketProcessor`
`PPass`	`PostPass`
`PSR`	`PistonStructureResolver`
`PST`	`PrepareSpawnTask`
`RB`	`RepeaterBlock`
`RCPL`	`ClientPacketListener`
`RDC`	`RegistryDataCollector`
`RemS`	`RemoteSlot`
`ResultC`	`ResultContainer`
`ResultS`	`ResultSlot`
`RGL`	`ReportGameListener`
`RM`	`RecipeManager`
`RootP`	`RootPlacer`
`RP`	`RenderPass`
`RRM`	`ReloadableResourceManager`
`RSR`	`ReloadableServerResources`
`RSReg`	`ReloadableServerRegistries`
`RWB`	`RedstoneWireBlock`
`SA`	`ScoreAccess`
`SAB`	`AbstractBoat`
`SAI`	`SpatialAttributeInterpolator`
`SBL`	`SoundBufferLibrary`
`SCC`	`ServerChunkCache`
`SCD`	`SerializableChunkData`
`SCL`	`ServerConnectionListener`
`SCPL`	`ServerConfigurationPacketListenerImpl`
`Screen`	`Screen`
`SDS`	`ServerDebugSubscribers`
`SE`	`ServerEntity`
`SectC`	`SectionCompiler`
`SED`	`SynchedEntityData`
`SEE`	`SoundEngineExecutor`
`SGPL`	`ServerGamePacketListenerImpl`
`ShadM`	`ShaderManager`
`Sheep`	`Sheep`
`SIB`	`SleepInBed`
`SICF`	`SetItemCountFunction`
`SL`	`ServerLevel`
`SLPL`	`ServerLoginPacketListenerImpl`
`SndE`	`SoundEngine`
`SNS`	`SubmitNodeStorage`
`SP`	`ServerPlayer`
`SPB`	`StructurePiecesBuilder`
`SPGM`	`ServerPlayerGameMode`
`SPie`	`StrongholdPieces`
`SR`	`SkyRenderer`
`SRB`	`ServerRecipeBook`
`SRD`	`SectionRenderDispatcher`
`SRI`	`SimpleReloadInstance`
`SRT`	`SynchronizeRegistriesTask`
`SS`	`ServerScoreboard`
`SSB`	`SculkSensorBlock`
`SSpl`	`StringSplitter`
`SStr`	`StrongholdStructure`
`SSVU`	`SculkSensorBlockEntity.VibrationUser`
`STemp`	`StructureTemplate`
`SumC`	`SummonCommand`
`SUT`	`SectionUpdateTracker`
`SW`	`ServerWatchdog`
`TagP`	`TagParser`
`TC`	`TestCommand`
`TCC`	`TransientCraftingContainer`
`TDec`	`TreeDecorator`
`TDSS`	`TrackingDebugSynchronizer.SourceSynchronizer`
`TF`	`TreeFeature`
`TIB`	`TestInstanceBlockEntity`
`TL`	`TagLoader`
`TLE`	`ThreadedLevelLightEngine`
`TP`	`TrunkPlacer`
`TrC`	`TranslatableContents`
`TS`	`TicketStorage`
`TVO`	`TagValueOutput`
`UAFS`	`UpdateActivityFromSchedule`
`VSel`	`VibrationSelector`
`VSL`	`VibrationSystem.Listener`
`VST`	`VibrationSystem.Ticker`
`WCUS`	`WorldCreationUiState`
`WGL`	`WorldGenLevel`
`WL`	`WorldLoader`
`WOF`	`WorldOpenFlows`
`WR`	`WorldgenRandom`
`ZM`	`ZombieModel`
`ZR`	`ZombieRenderer`
`Auth`	the User Authenticator thread, not a class
`Disk`	the save on disk, not a class
`Game`	the game’s own code above Blaze3D, not a class
`Hook`	the Server Shutdown Thread JVM hook, not a class
`JVM`	the process itself, not a class
`Main`	the thread running whichever program’s Main the diagram is about — the client’s on the JVM main thread, the server’s on the thread the jar’s bundler starts — so not one class
`Netty`	the Netty event loop, not a class
`Sess`	the Mojang session service both machines call over HTTPS, not a class
`Wire`	the network between the two programs, not a class
`Worker`	the `Util.backgroundExecutor` pool, not a class

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How Java Minecraft Works

Diagram lanes