Grain parent child supervision

[Arttii]

Hi,

I was wondering if it's possible to start several children in a grain, which themselves are grain. I am specifically wondering if there is a parent child supervision type mechanism when using grains in this way.

The background is that I am starting several grains, but a parent grain drives them. In case that shuts down, I would like to propagate the shutdown to the children. I am doing this because in one case the actors are indeed grains and will run somewhere in the cluster, but in a specific case it's desirable for them to run together and be supervised by one parent actor.

Is there away to do this, or should I implement everything as direct actors instead? Thanks!

EDIT:

It seems if I do something like this:

              props := actor.PropsFromProducer(func() actor.Actor {
			              return &grain.Actor{
				              Timeout: 0,
			              }
		  })
		pid, _ := ctx.SpawnNamed(props,Id)

		 

		client := getNamespacedGrainGrainClient(cl, ctx.Self().Id,Id)

From the parent grain, where getNamespacedGrainGrainClient resolved the client to the same identity, then i can force the grain to run as a child of the parent grain.

Is this an anti-pattern?

[Roger Johansson]

Sorry for late response here.
No, there is no way to apply supervision for grains. or have any type of parent-child relation between grains.
Grains are fully managed by the IdentityLookupProvider used, eg. disthash.