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Modules

Module Layer

Root Layer

  • bootstraplauncher
  • securejarhandler

Bootstrap Layer

  • modlauncher
  • JarJarMetadata
  • JarJarSelector
  • fmlearlydisplay
  • fmlloader
  • accesstransformers
  • coremods
  • eventbus
  • forgespi
  • srgutils
  • unsafe
  • terminalconoleappender
  • mergetool

Service Layer

  • mods that declare services

Plugin Layer

  • fmlcore
  • javafmllanguage
  • lowcodelanguage
  • mclanguage

Game Layer

  • mods

Services

Boot Layer

  • ILaunchPluginService
  • ILaunchHandlerService
  • INameMappingService
  • ITransformerDiscoveryService
  • ICoreModProvider (singleton)
  • IEventBusEngine (singleton)

Service Layer

  • ITransformationService
  • IModLocator
  • IDependencyLocator

Plugin Layer

  • IModLanguageProvider

Game Layer

  • IBindingsProvider
  • IModStateProvider

Launching Process

Bootstrap

  • BootstrapLauncher.main
    • Load library jars from classpath. Those jars are minecraft or forge utilities
    • Initialize ModuleClassLoader MC-BOOTSTRAP. Create ModuleLayer.
  • Launcher.main
    • Log INFO: "ModLauncher running: args {}"
  • Launcher.<init>
    • Log INFO: "ModLauncher {} starting"
  • Launcher.run
    • TransformationServicesHandler.discoverServices
      • Log DEBUG: "Discovering transformation services"
      • Gather ITransformerDiscoveryService (ModDir, ClassPath)
      • ITransformerDiscoveryService.earlyInitialization
        • ImmediateWindowHandler.load (from ModDir)
        • Display progress Bootstrapping Minecraft
      • Gather ITransformationService (FML, Mixin)
      • Log DEBUG: "Found transformer services"
      • TransformationServicesHandler.initializeTransformationServices
        • Log DEBUG: "FML {} loading" ~ "Found ForgeSPI package specification"
        • Log INFO: "SpongePowered MIXIN Subsystem Version"
        • FMLLoader.beginModScan
          • Display progress Discovering mod files
          • Log DEBUG: "Scanning for mods and other resources to load"
          • Log INFO: "Found {} dependencies adding them to mods collection"
          • Display progress Found {} mod candidates
    • FMLLoader.completeScan
      • Display progress Loading language providers
      • Display progress Scanning mod candidates
      • Load all mods.toml files
    • TransformationServicesHandler.initialiseServiceTransformers
      • Gather coremods
    • TransformationServicesHandler.buildTransformingClassLoader
  • LaunchServiceHandler.launch
    • MixinBootstrap.doInit
    • MixinBootstrap.inject
    • Log Info: "Launching target"
    • FMLLoader.beforeStart
      • Loading Forge module, trigger mixin stuff
      • Trigger "Error loading class" and "@Mixin target {} was not found" from mixin
      • Display progress Launching minecraft

Client

Entry point: Main.main

  • Misc initializations, such as crash report memory reserve
  • Display progress Loading bootstrap resources
  • Bootstrap.bootStrap
  • RenderSystem.initRenderThread
  • Minecraft.<init>
    • Log INFO: "Setting user"
    • Mixin: BeforeConstant stuff
    • Log INFO: "Backend library"
    • Display progress Initializing Game Graphics from
    • ClientModLoader.begin
      • Display progress Loading Mods
      • ModLoader.gatherAndInitializeMods
        • Display progress Mod Gather {}
        • State Transitions: GATHER
          • VALIDATE
          • CONSTRUCT
          • CREATE_REGISTRIES
          • OBJECT_HOLDERS
          • INJECT_CAPABILITIES
          • UNFREEZE_DATA
          • LOAD_REGISTRIES
      • ResourcePackLoader.loadResourcePacks
      • Event: AddPackFindersEvent
    • Register a bunch of managers as resource listener
    • Event: RenderLevelStageEvent.RegisterStageEvent
    • Event: RegisterParticleProvidersEvent
    • Init ClientHooks, firing a bunch of events
    • More vanilla client setups
    • ReloadableResourceManager.createReload Start
    • Display progress Minecraft Progress
  • Render thread setup
  • Start Minecraft client grand game loop

Running ReloadableResourceManager.createReload

  • All resource listeners
  • State Transitions: LOAD
    • CONFIG_LOAD
    • COMMON_SETUP
    • SIDED_SETUP
  • State Transitions: COMPLETE
    • ENQUEUE_IMC
    • PROCESS_IMC
    • COMPLETE
    • FREEZE_DATA
    • NETWORK_LOCK
  • State Transitions: DONE
  • Options.load

Server

Entry point: Main.main

  • Misc initializations, such as crash report memory reserve
  • Bootstrap.bootStrap
  • ServerModLoader.load
    • State Transitions: GATHER
      • VALIDATE
      • CONSTRUCT
      • CREATE_REGISTRIES
      • OBJECT_HOLDERS
      • INJECT_CAPABILITIES
      • UNFREEZE_DATA
      • LOAD_REGISTRIES
    • State Transitions: LOAD
      • CONFIG_LOAD
      • COMMON_SETUP
      • SIDED_SETUP
    • State Transitions: COMPLETE
      • ENQUEUE_IMC
      • PROCESS_IMC
      • COMPLETE
      • FREEZE_DATA
      • NETWORK_LOCK
  • World loading