Damage with EntityQueue

package red.mirai.miraicombat.events;

import ...;

public class DamageApplicationEvent implements Listener {
    //ConcurrentLinkedQueue<Entity> entityQueue = new ConcurrentLinkedQueue<>();
    public static LoadingCache<UUID, Entity> entityQueue = CacheBuilder.newBuilder()
            .maximumSize( 256 )
            .expireAfterWrite( 3L, TimeUnit.MINUTES )
            .build( CacheLoader.from( ( key ) -> null ) );

    @EventHandler( priority = EventPriority.HIGH )
    public void onPlayerDamageEvent( EntityDamageByEntityEvent event ) {
        Entity attacker = event.getDamager();
        Entity target = event.getEntity();
        UUID targetID = target.getUniqueId();

        final double damage = event.getFinalDamage();

        //if ( !entityQueue.contains( target ) ) {
        if ( entityQueue.getUnchecked( targetID ) != null ) {
            DamageCalc applyDamage = new DamageCalc();
            //entityQueue.add( target );
            entityQueue.put( targetID, target );

            applyDamage.init( attacker, target, damage, (apply, newDamage) -> {
                if ( apply ) {
                    double bonusDamage = ( newDamage - damage );
                    Damageable dmgTarget = (Damageable) target;
                    dmgTarget.damage( bonusDamage, attacker );
                }
                //entityQueue.remove( target );
                entityQueue.invalidate( targetID );
            } );
        }
    }
}