I want to implement support for global object identification in my service. In particular, I want to implement the Node interface and the Query.node field. The latter is non-trivial; we currently have an implementation that requires us to manually add each type that implements Node to a custom data structure that we use to resolve the ID. So, each type will extend Node[TYPE] and we add the TYPE to a slightly complex structure manually to handle the resolver.

I am curious if anyone has implemented this in a more general manner that is more straight forward to use?

The dream scenario would be to have something where we simply do case class Foo(...) extends Node. Or perhaps case class Foo(...) extends Node[Foo] where everything else required for Query.node is handled automatically.