Can't cancel event?

So I have this code:

Code:java

    @EventHandler(priority = EventPriority.HIGHEST)
     public void onDestroy(PlayerItemDamageEvent event){
 
    }

And I tried the following things in it already:

Code:java

 
  event.setCancelled(true);
  event.getItem().setDurability((short) 1);
  event.setDamage(0);
 

I know that if I cancel it the setDamage doesn't have impact anymore, but I did not do that, I tried these things seperately.

And yes, I registered events as I am able to send a message to myself when the event is called.

I would like to know why it's not working or if it's a glitch or something? Or am I using the wrong event?

What I want to do is cancel damage and let the item be sort of unbreakable.

I know I can for example delete and re-add the item or give it an enchantment but that's kinda hacky.
I'm just interested as I'm still learning a bit and would like to know why this is acting the way it is.

Thanks in advance!

 

@stenlankreijer The PlayerItemDamageEvent doesn't even exist. This is a Spigot question, but my guess is that it doesn't implement cancelable.

 

Oh, I'm sorry
It exists for me, but I'm indeed using bukkit AND spigot.

I guess I'll just go for the hacky way