I'm trying to develop a simple mod that will export certain properties of every registered item to an external file. Most of my properties are working, but I'm having trouble trying to implement the burnTime property. First, I tried using 

item.getBurnTime(new ItemStack(item, 1))

and found that method was repeatedly returning "-1" because the value was to be determined by the vanilla Minecraft Logic. I then did some research and found that I could use this:

ForgeHooks.getBurnTime(new ItemStack(item, 1))

I found that this was continuously returning "0" instead of my desired value, presumably because the map "VANILLA_BURNS" has no entry for the item. Finally, I tried using the deprecated

FurnaceTileEntity.getBurnTimes().get(item)

where I got the error

 java.lang.IllegalStateException: Tag minecraft:non_flammable_wood used before it was bound
Stacktrace:
	at net.minecraft.tags.TagRegistry$NamedTag.getTag(TagRegistry.java:131) ~[forge-1.16.4-35.0.18_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.tags.TagRegistry$NamedTag.contains(TagRegistry.java:142) ~[forge-1.16.4-35.0.18_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.tileentity.AbstractFurnaceTileEntity.isNonFlammable(AbstractFurnaceTileEntity.java:161) ~[forge-1.16.4-35.0.18_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.tileentity.AbstractFurnaceTileEntity.addItemBurnTime(AbstractFurnaceTileEntity.java:175) ~[forge-1.16.4-35.0.18_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.tileentity.AbstractFurnaceTileEntity.getBurnTimes(AbstractFurnaceTileEntity.java:97) ~[forge-1.16.4-35.0.18_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at com.example.examplemod.ExampleMod.setup(ExampleMod.java:104) ~[main/:?] {re:classloading}
	at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:247) ~[eventbus-3.0.5-service.jar:?] {}
	at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:239) ~[eventbus-3.0.5-service.jar:?] {}
	at net.minecraftforge.eventbus.EventBus.post(EventBus.java:297) ~[eventbus-3.0.5-service.jar:?] {}
	at net.minecraftforge.fml.javafmlmod.FMLModContainer.acceptEvent(FMLModContainer.java:120) ~[forge:?] {re:classloading}
	at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:121) ~[forge:?] {re:classloading}
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1800) ~[?:?] {}
	at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1792) ~[?:?] {}
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?] {}
	at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?] {}
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?] {}
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?] {}
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[?:?] {}

Which seems to indicate that the burn times cannot be generated yet. I was generating my file during the "FMLCommonSetupEvent" event. How can I successfully retrieve the correct value for burnTime?

4 hours ago, ptolemy2002 said:

I was generating my file during the "FMLCommonSetupEvent" event. How can I successfully retrieve the correct value for burnTime?

You need to wait until after tags have been read and generated. There's an event for that too, but I'm blanking on its name.

IIRC it doesn't happen until after you start or load a save though.

Which event should I be using to accomplish this? Currently I am trying to subscribe to the TagsUpdatedEvent, but it doesn't appear to be called at all.

@Mod.EventBusSubscriber(bus=Bus.FORGE)
public static class GenericEvents {
  	@SubscribeEvent
    public static void onTagsUpdated(TagsUpdatedEvent event) {
    ...
    }
}

 

Thank you. My mod is working now.

1 hour ago, ptolemy2002 said:

but it doesn't appear to be called at all.

Probably the wrong bus. But I'd go with D7's suggestion of the player logged in event.