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[1.17.1] Forge Capability - How to save?

Posted December 2, 20213 yr

Hey guys I have created a mod that assigns levels to mobs and scales them up using capabilities, everything works great but because of the recent changes to capabilities I am unable to find examples on how to save the level of my mobs so that it remains the same if I restart the server. I will upload all my files relating to the capability and hope you guys can lead me in the right direction

package com.chickenwand3.rpgmod.core.capabilities.entity;

import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.CapabilityInject;
import net.minecraftforge.common.capabilities.CapabilityManager;

@SuppressWarnings("removal")
public class CapabilityMobLevel {

    @CapabilityInject(MobLevel.class)
    public static Capability<MobLevel> MOB_LEVEL_CAPABILITY = null;

    public static void register() {
        CapabilityManager.INSTANCE.register(MobLevel.class);
    }
}

package com.chickenwand3.rpgmod.core.capabilities.entity;

public class DefaultMobLevel implements MobLevel {

    public int mobLevel;
    public float mobMaxHealth;
    public float mobCurrentHealth;
    public boolean crazy;
    
    public boolean isCrazy() {
    	return crazy;
    }
    
    public float getMaxHealth() {
    	return mobMaxHealth;
    }
    
    public float getCurrentHealth() {
    	return mobCurrentHealth;
    }
}

package com.chickenwand3.rpgmod.core.capabilities.entity;

public interface MobLevel {
}

package com.chickenwand3.rpgmod.core.capabilities.entity;

import com.chickenwand3.rpgmod.RPGMod;

import net.minecraft.resources.ResourceLocation;

import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.Mob;
import net.minecraft.world.entity.ai.attributes.Attributes;
import net.minecraft.world.entity.monster.Zombie;
import net.minecraft.world.item.enchantment.Enchantments;
import net.minecraftforge.event.AttachCapabilitiesEvent;
import net.minecraftforge.event.entity.EntityJoinWorldEvent;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;

@Mod.EventBusSubscriber(modid = RPGMod.MODID, bus = Mod.EventBusSubscriber.Bus.FORGE)
public class MobLevelEventHandler {
	@SubscribeEvent
	public static void onAttachCapabilitiesEvent(AttachCapabilitiesEvent<Entity> event) {
		if (event.getObject() instanceof Mob && !event.getObject().getCommandSenderWorld().isClientSide) {
			MobLevelProvider providerMobLevel = new MobLevelProvider();
			event.addCapability(new ResourceLocation(RPGMod.MODID, "moblevel"), providerMobLevel);
			event.addListener(providerMobLevel::invalidate);
		}
	}

	@SubscribeEvent
	public static void OnSpawn(final EntityJoinWorldEvent event) {
		if (event.getEntity()instanceof Mob target && !event.getWorld().isClientSide) {
			target.getCapability(CapabilityMobLevel.MOB_LEVEL_CAPABILITY).ifPresent(mobLevel -> {
				DefaultMobLevel actualMobLevel = (DefaultMobLevel) mobLevel;
				actualMobLevel.mobLevel = (randomizeMobLevel());

				if (superCrazy(actualMobLevel.mobLevel)) {
					actualMobLevel.crazy = true;
				}

				if (actualMobLevel.crazy) {

					if (!target.getMainHandItem().isEmpty()) {
						target.getMainHandItem().enchant(Enchantments.FIRE_ASPECT, 1);
					}
					if (event.getEntity()instanceof Zombie zombie) {
						zombie.getAttribute(Attributes.SPAWN_REINFORCEMENTS_CHANCE).setBaseValue(0.99D);
					}
					System.out.println("Super Crazy " + target.getName() + " has spawned!");
				}

				actualMobLevel.mobMaxHealth = (target.getMaxHealth() * actualMobLevel.mobLevel * 2);
				actualMobLevel.mobCurrentHealth = actualMobLevel.mobMaxHealth;
				target.getAttribute(Attributes.MOVEMENT_SPEED)
						.setBaseValue(target.getAttributeValue(Attributes.MOVEMENT_SPEED)
								* (1 + (actualMobLevel.mobLevel - 1.0) / 10.0));

				if (target.getAttribute(Attributes.ATTACK_DAMAGE) != null) {
					target.getAttribute(Attributes.ATTACK_DAMAGE)
							.setBaseValue(target.getAttributeValue(Attributes.ATTACK_DAMAGE)
									* (1 + (actualMobLevel.mobLevel - 1.0) / 2.0));
				}

			});
		}
	}

	private static int randomizeMobLevel() {
		boolean roll = true;
		int level = 1;
		while (roll) {
			if (Math.random() > .5) {
				level += 1;
				roll = true;
			} else {
				roll = false;
			}
		}
		return level;
	}

	private static boolean superCrazy(int level) {
		boolean result = false;
		if (level >= 5) {
			if (Math.random() < .25) {
				result = true;
			} else
				result = false;
		}
		return result;
	}

}

package com.chickenwand3.rpgmod.core.capabilities.entity;

import net.minecraft.core.Direction;
import net.minecraft.nbt.CompoundTag;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.ICapabilitySerializable;
import net.minecraftforge.common.util.LazyOptional;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class MobLevelProvider implements ICapabilitySerializable<CompoundTag> {
    private final DefaultMobLevel mobLevel = new DefaultMobLevel();
    private final LazyOptional<MobLevel> mobLevelOptional = LazyOptional.of(() -> mobLevel);

    public void invalidate() {
        mobLevelOptional.invalidate();
    }

    @Nonnull
    @Override
    public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap, @Nullable Direction side) {
        return mobLevelOptional.cast();
    }

    @Override
    public CompoundTag serializeNBT() {
        if (CapabilityMobLevel.MOB_LEVEL_CAPABILITY == null) {
            return new CompoundTag();
        } else {
            CompoundTag compoundNBT = new CompoundTag();
            compoundNBT.putInt("mobLevel", mobLevel.mobLevel);
            compoundNBT.putFloat("mobCurrentHealth", mobLevel.mobCurrentHealth);
            compoundNBT.putFloat("mobMaxHealth", mobLevel.mobMaxHealth);
            compoundNBT.putBoolean("crazy", mobLevel.crazy);
            return compoundNBT;
        }
    }
    

    @Override
    public void deserializeNBT(CompoundTag nbt) {
        if (CapabilityMobLevel.MOB_LEVEL_CAPABILITY != null) {
            mobLevel.mobLevel = (nbt.getInt("mobLevel"));
            
            float mobCurrentHealth = nbt.getFloat("mobCurrentHealth");
            mobLevel.mobCurrentHealth = (mobCurrentHealth);
            
            float mobMaxHealth = nbt.getFloat("mobMaxHealth");
            mobLevel.mobMaxHealth = (mobMaxHealth);
            
            boolean crazy = nbt.getBoolean("crazy");
            mobLevel.crazy = (crazy);
        }
    }
}

Quote

December 2, 20213 yr

4 hours ago, chickenwand3 said:

I will upload all my files relating to the capability and hope you guys can lead me in the right direction

Is that a question?

If yes, your capability should be saved since your CapabilityProvider implements ICapabilitySerializable

Quote

December 2, 20213 yr

Author

Yeah its a question sorry for phrasing it weird, currently everytime I restart the server the mobs .mobLevel is being reset because it isn't saving. Im trying to decipher why this is happening and how to make it so that the .mobLevel for all the mobs in the server persists after a server restart

Quote

December 3, 20213 yr

are the serializeNBT and deserializeNBT method called, use Debbuger?

Quote

December 4, 20213 yr

Author

Good idea let me check

Quote

December 4, 20213 yr

Author

https://pastebin.com/LvSbvYhL

@Override
    public CompoundTag serializeNBT() {
    	System.out.println("It serialized");
        if (CapabilityMobLevel.MOB_LEVEL_CAPABILITY == null) {
        	System.out.println("It made a new compound");
            return new CompoundTag();
        } else {
        	System.out.println("It serialized the values");
            CompoundTag compoundNBT = new CompoundTag();
            compoundNBT.putInt("mobLevel", mobLevel.mobLevel);
            compoundNBT.putFloat("mobCurrentHealth", mobLevel.mobCurrentHealth);
            compoundNBT.putFloat("mobMaxHealth", mobLevel.mobMaxHealth);
            compoundNBT.putBoolean("crazy", mobLevel.crazy);
            return compoundNBT;
        }
    }
    

    @Override
    public void deserializeNBT(CompoundTag nbt) {
    	System.out.println("It deserialized");
        if (CapabilityMobLevel.MOB_LEVEL_CAPABILITY != null) {
        	System.out.println("It deserialized the values");
            mobLevel.mobLevel = (nbt.getInt("mobLevel"));
            
            float mobCurrentHealth = nbt.getFloat("mobCurrentHealth");
            mobLevel.mobCurrentHealth = (mobCurrentHealth);
            
            float mobMaxHealth = nbt.getFloat("mobMaxHealth");
            mobLevel.mobMaxHealth = (mobMaxHealth);
            
            boolean crazy = nbt.getBoolean("crazy");
            mobLevel.crazy = (crazy);
        }
    }

It seems like CapabilityMobLevel.MOB_LEVEL_CAPABILITY is always null and that is why it is acting like its a new entity and generating new values

Quote

December 4, 20213 yr

Author

Im looking and apparently @CapabilityInject is deprecated maybe that is why???

Quote

December 4, 20213 yr

you need to use RegisterCapabilitiesEvent to register your Capability

Quote

December 4, 20213 yr

Author

It worked thanks a lot ❤️ I'm gonna paste all of my code for anyone in the future looking to do capabilities

package com.chickenwand3.rpgmod.core.capabilities.entity;

import javax.annotation.Nullable;

import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.CapabilityManager;
import net.minecraftforge.common.capabilities.CapabilityToken;
import net.minecraftforge.common.capabilities.ICapabilityProvider;

public class CapabilityMobLevel{
	
    public static Capability<MobLevel> MOB_LEVEL_CAPABILITY = CapabilityManager.get(new CapabilityToken<>() {});
    
    public static void register() {
        CapabilityManager.INSTANCE.register(MobLevel.class);
    }
    

}

package com.chickenwand3.rpgmod.core.capabilities.entity;

public class DefaultMobLevel implements MobLevel {

    public int mobLevel;
    public float mobMaxHealth;
    public float mobCurrentHealth;
    public boolean crazy;
    
    public boolean isCrazy() {
    	return crazy;
    }
    
    public float getMaxHealth() {
    	return mobMaxHealth;
    }
    
    public float getCurrentHealth() {
    	return mobCurrentHealth;
    }
}

package com.chickenwand3.rpgmod.core.capabilities.entity;

public interface MobLevel {
}

package com.chickenwand3.rpgmod.core.capabilities.entity;

import com.chickenwand3.rpgmod.RPGMod;

import net.minecraft.resources.ResourceLocation;

import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.Mob;
import net.minecraft.world.entity.ai.attributes.Attributes;
import net.minecraft.world.entity.animal.Animal;
import net.minecraft.world.entity.monster.Zombie;
import net.minecraft.world.item.enchantment.Enchantments;
import net.minecraftforge.common.capabilities.RegisterCapabilitiesEvent;
import net.minecraftforge.event.AttachCapabilitiesEvent;
import net.minecraftforge.event.entity.EntityJoinWorldEvent;
import net.minecraftforge.event.entity.living.LivingDeathEvent;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;

@Mod.EventBusSubscriber(modid = RPGMod.MODID, bus = Mod.EventBusSubscriber.Bus.FORGE)
public class MobLevelEventHandler {
	@SubscribeEvent
	public static void onAttachCapabilitiesEvent(AttachCapabilitiesEvent<Entity> event) {
		if (event.getObject() instanceof Mob && !event.getObject().getCommandSenderWorld().isClientSide) {
			MobLevelProvider providerMobLevel = new MobLevelProvider();
			event.addCapability(new ResourceLocation(RPGMod.MODID, "moblevel"), providerMobLevel);
			event.addListener(providerMobLevel::invalidate);
		}
	}
	
	@SubscribeEvent
	public void registerCaps(RegisterCapabilitiesEvent event) {
	    event.register(MobLevel.class);
	}
	
	
	

	@SubscribeEvent
	public static void OnSpawn(final EntityJoinWorldEvent event) {
		if (event.getEntity()instanceof Mob target && !event.getWorld().isClientSide) {
			target.getCapability(CapabilityMobLevel.MOB_LEVEL_CAPABILITY).ifPresent(mobLevel -> {
				DefaultMobLevel actualMobLevel = (DefaultMobLevel) mobLevel;
				
				if (actualMobLevel.mobLevel < 1) {
					actualMobLevel.mobLevel = (randomizeMobLevel());
				}

				if (superCrazy(actualMobLevel.mobLevel)) {
					actualMobLevel.crazy = true;
				}

				if (actualMobLevel.crazy) {

					if (!target.getMainHandItem().isEmpty()) {
						target.getMainHandItem().enchant(Enchantments.FIRE_ASPECT, 1);
					}
					if (event.getEntity()instanceof Zombie zombie) {
						zombie.getAttribute(Attributes.SPAWN_REINFORCEMENTS_CHANCE).setBaseValue(0.99D);
					}
					System.out.println("Super Crazy " + target.getName() + " has spawned!");
				}

				actualMobLevel.mobMaxHealth = (target.getMaxHealth() * actualMobLevel.mobLevel * 2);
				actualMobLevel.mobCurrentHealth = actualMobLevel.mobMaxHealth;
				target.getAttribute(Attributes.MOVEMENT_SPEED)
						.setBaseValue(target.getAttributeValue(Attributes.MOVEMENT_SPEED)
								* (1 + (actualMobLevel.mobLevel - 1.0) / 10.0));

				if (target.getAttribute(Attributes.ATTACK_DAMAGE) != null) {
					target.getAttribute(Attributes.ATTACK_DAMAGE)
							.setBaseValue(target.getAttributeValue(Attributes.ATTACK_DAMAGE)
									* (1 + (actualMobLevel.mobLevel - 1.0) / 2.0));
				}

			});
		}
	}

	private static int randomizeMobLevel() {
		boolean roll = true;
		int level = 1;
		while (roll) {
			if (Math.random() > .5) {
				level += 1;
				roll = true;
			} else {
				roll = false;
			}
		}
		return level;
	}

	private static boolean superCrazy(int level) {
		boolean result = false;
		if (level >= 5) {
			if (Math.random() < .25) {
				result = true;
			} else
				result = false;
		}
		return result;
	}

}

package com.chickenwand3.rpgmod.core.capabilities.entity;

import net.minecraft.core.Direction;
import net.minecraft.nbt.CompoundTag;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.ICapabilitySerializable;
import net.minecraftforge.common.util.LazyOptional;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class MobLevelProvider implements ICapabilitySerializable<CompoundTag> {
    private final DefaultMobLevel mobLevel = new DefaultMobLevel();
    private final LazyOptional<MobLevel> mobLevelOptional = LazyOptional.of(() -> mobLevel);

    public void invalidate() {
        mobLevelOptional.invalidate();
    }

    @Nonnull
    @Override
    public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap, @Nullable Direction side) {
        return mobLevelOptional.cast();
    }

    @Override
    public CompoundTag serializeNBT() {
    	System.out.println("It serialized");
        if (CapabilityMobLevel.MOB_LEVEL_CAPABILITY == null) {
        	System.out.println("It made a new compound");
            return new CompoundTag();
        } else {
        	System.out.println("It serialized the values");
            CompoundTag compoundNBT = new CompoundTag();
            compoundNBT.putInt("mobLevel", mobLevel.mobLevel);
            compoundNBT.putFloat("mobCurrentHealth", mobLevel.mobCurrentHealth);
            compoundNBT.putFloat("mobMaxHealth", mobLevel.mobMaxHealth);
            compoundNBT.putBoolean("crazy", mobLevel.crazy);
            return compoundNBT;
        }
    }
    

    @Override
    public void deserializeNBT(CompoundTag nbt) {
    	System.out.println("It deserialized");
        if (CapabilityMobLevel.MOB_LEVEL_CAPABILITY != null) {
        	System.out.println("It deserialized the values");
            mobLevel.mobLevel = (nbt.getInt("mobLevel"));
            
            float mobCurrentHealth = nbt.getFloat("mobCurrentHealth");
            mobLevel.mobCurrentHealth = (mobCurrentHealth);
            
            float mobMaxHealth = nbt.getFloat("mobMaxHealth");
            mobLevel.mobMaxHealth = (mobMaxHealth);
            
            boolean crazy = nbt.getBoolean("crazy");
            mobLevel.crazy = (crazy);
        }
    }
}

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game crashes and i have no clue why

Remove the mod brutality

By TileEntity · 20 hours ago20 hr
game crashes and i have no clue why

https://pastebin.com/zDnHUvx7

By HOTDOGKING272829 · Posted Yesterday at 02:13 AM1 day
hi i'm new to this. where does "--enable-native-access=com.sun.jna" go?

Hold on, wait a minute. So are you saying that the server you are trying to run is crashing or failing to work properly? If this is the case, then it should have nothing to do with a warning message. Could you be a little more specific as to what's going on? Are you just annoyed that there are some warning messages being displayed? (I mean, if that's the case then I can totally understand.) Again, I notice that you use the word "attempted" when referring to launching the forge server. This gives me the impression that something is going much more wrongly than a warning.

By Jackson Perr · Yesterday at 12:46 AM1 day
hi i'm new to this. where does "--enable-native-access=com.sun.jna" go?

note: i have tried putting this in user_jvm_args but it doesn't seem to work

By Guyguise · Wednesday at 11:46 PM1 day
hi i'm new to this. where does "--enable-native-access=com.sun.jna" go?

i am playing on a linux mint distro, and am attempting to run a forge 1.20.1 server

this seems to be the relevant warning message:

WARNING: A restricted method in java.lang.System has been called
WARNING: Java.lang.System::load has been caused by com.sun.jna.Native in module com.sun.jna (union:libraries/net/java/dev/jna/jna/5.12.1/jna-5.12.1.jar%2391!/)
WARNING: Use --enable-native-access=com.sun.jna to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

By Guyguise · Posted Wednesday at 11:41 PM1 day

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[1.17.1] Forge Capability - How to save?

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game crashes and i have no clue why

game crashes and i have no clue why

hi i'm new to this. where does "--enable-native-access=com.sun.jna" go?

hi i'm new to this. where does "--enable-native-access=com.sun.jna" go?

hi i'm new to this. where does "--enable-native-access=com.sun.jna" go?

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