maxkar / scala-reactive Goto Github PK

Consider following fragment:

case class Model(va : Behaviour[Int], vb : Behaviour[Int]);
def sum(a : Int)(b : Int) : Int = a + b;

def dirtyFn(cond : Boolean)(va : Model)(vb : Model)(optional???) : Behaviour[Int] = {
  if (cond)
    sum _ :> va.a :> vb.b
  else
    sum _ :> va.b :> vb.a 
}

val cond : Behaviour[Boolean] = ...
val va : Behaviour[Model] = ...
val vb : Behaviour[Model] = ...

val session = new Session()
val testVal : Behaviour[Int] = dirtyFn _ :> cond :> va :~>> vb 

// doSomething with cond, va, vb, va.value.a, va.value.b, vb.value.a, vb.value.b
session.destroy();

After destroying the session all associations between testVal and (cond, va, vb, va.value.a, va.value.b, vb.value.a, vb.value.b) and all intermediate nodes should be destroyed. Changes to va or vb should remove all references to unused .value. values (no unintentional retentions even for intermediate results) and create new (actual) relations. I.e. only minimal number of relations should be maintained and all unnecessary relations should be removed after the session cleanup. As dirtyFn is already aware of Reactive behaviour, it can receive some additional arguments to cooperate with the library.

Need to support following scenario.

def doSomething(model : Behaviour[Behavior[T]]) : Unit = {
  implicit val session = new Session();
  val x : Behavior[T] = ?? (flatten(model));
  doSomethingWith(x);
  session.destroy();
}

At the end of the code I want that x have no association neither with model nor with model.value. I.e. model should have same dependants as it had before calling this method. proxy(model) will remove only dependency from model but not from model.value. It is possible to create an inner proxy for model.value and manually manage it, but I want some OOB solution for this kind of problems.