Hi whenever i hit my boss i can hit him once but no more and he continuously turns red like when you hit a normal mob but stays that way

 

Entity

package com.camerpon900.realauto2.bosses;

import com.camerpon900.realauto2.RealAuto2;
import com.camerpon900.realauto2.entity.EntityCamerpon900Mob;
import cpw.mods.fml.common.registry.EntityRegistry;
import net.minecraft.entity.EnumCreatureType;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.entity.ai.EntityAIHurtByTarget;
import net.minecraft.entity.ai.EntityAINearestAttackableTarget;
import net.minecraft.entity.ai.EntityAISwimming;
import net.minecraft.entity.ai.EntityAIWander;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.DamageSource;
import net.minecraft.world.World;
import net.minecraft.world.biome.BiomeGenBase;

public class EntityRedstoneBoss extends RA2Boss {

    public EntityRedstoneBoss(World world) {
        super(world);
        this.setSize(3F,4F);
    }

    @Override
    protected void applyEntityAttributes(){
        super.applyEntityAttributes();
        this.getEntityAttribute(SharedMonsterAttributes.maxHealth).setBaseValue(220D);
    }

    @Override
    protected void initAI(){
        this.getNavigator().setBreakDoors(true);
        this.tasks.addTask(0, new EntityAIWander(this, 1D));
        this.tasks.addTask(1, new EntityAISwimming(this));
        this.targetTasks.addTask(2, new EntityAIHurtByTarget(this, true));
        this.targetTasks.addTask(3, new EntityAINearestAttackableTarget(this, EntityPlayer.class, 0, true));
    }

    public int hitCount = 0;

    @Override
    public boolean attackEntityFrom(DamageSource par1DamageSource, float par2){
        hitCount++;
        return super.attackEntityFrom(par1DamageSource, par2);
    }

}

 

Bosses Class

package com.camerpon900.realauto2.bosses;

import com.camerpon900.realauto2.RealAuto2;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.entity.ai.EntityAIHurtByTarget;
import net.minecraft.entity.ai.EntityAINearestAttackableTarget;
import net.minecraft.entity.ai.EntityAISwimming;
import net.minecraft.entity.monster.EntityMob;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.potion.PotionEffect;
import net.minecraft.world.World;

public class RA2Boss extends EntityMob implements IRA2Boss {

    public boolean playerCanSee = false;

    public RA2Boss(World world) {
        super(world);
        this.stepHeight = 1.02f;
        initAI();
    }

    @Override
    public void onUpdate() {

    }

    public void addAI() {

    }

    @Override
    protected boolean isAIEnabled(){
        return true;
    }

    @Override
    protected void applyEntityAttributes(){
        super.applyEntityAttributes();
        this.getEntityAttribute(SharedMonsterAttributes.followRange).setBaseValue(48);
    }

    protected void initAI(){
        this.getNavigator().setBreakDoors(true);
        this.tasks.addTask(0, new EntityAISwimming(this));
        this.targetTasks.addTask(1, new EntityAIHurtByTarget(this, true));
        this.targetTasks.addTask(2, new EntityAINearestAttackableTarget(this, EntityPlayer.class, 0, true));
    }

    @Override
    public boolean allowLeashing(){
        return false;
    }

    @Override
    public void addPotionEffect(PotionEffect effect){
        super.addPotionEffect(effect);
    }

    public World func_82194_d(){
        return this.worldObj;
    }

}

 

Renderer

package com.camerpon900.realauto2.bosses.render;

import com.camerpon900.realauto2.bosses.RA2Boss;
import net.minecraft.client.model.ModelBase;
import net.minecraft.client.renderer.entity.RenderLiving;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.boss.BossStatus;
import net.minecraft.util.ResourceLocation;

public abstract class RenderBoss extends RenderLiving {

    public RenderBoss(ModelBase model) {
        super(model,0.5F);
    }

    @Override
    protected void renderModel(EntityLivingBase par1EntityLivingBase, float par2, float par3, float par4, float par5, float par6, float par7){
        RA2Boss boss = (RA2Boss)par1EntityLivingBase;
        BossStatus.setBossStatus((RA2Boss) par1EntityLivingBase, true);
        super.renderModel(par1EntityLivingBase, par2, par3, par4, par5, par6, par7);
    }

    @Override
    protected abstract ResourceLocation getEntityTexture(Entity entity);

}

 

EDIT: I am aware that my boss has no AI yet and i want to find this out first before he goes around killing me and i cant do any damage to him

Anyone got any idea i cant understand why this is happening

@Override
    public void onUpdate() {

    }

... need I say more?