rx.core

Propagator

trait Propagator[P] extends AnyRef

A Propagator is an object which performs a propagation wave over the Scala.Rx dataflow graph. It is parametrized on the type P which it returns after performing a propagation wave. The two existing Propagators are:

Propagator.Immediate (Propagator[Unit]), which runs the propagation wave immediately and returns Unit when it is complete.

Propagator.ExecContext (Propagator[Future[Unit]]), which runs the propagation wave on the given ExecutionContext and returns a Future[Unit] representing the completion of the propagation wave.

It is conceivable that custom propagators could use the return type P to return other things, e.g. the number of updates performed, or the number of re-tries in that propagation wave. That is up to the implementer to decide.

P

the type that the propagate() function returns

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  1. abstract def propagate(pings: Set[(Emitter[_], Reactor[_])]): P

    Begins a propagation wave, with a set of

    Begins a propagation wave, with a set of

    Emitter -> Reactor

    pings. See the implementation of Propagator.Immediate or Propagator.ExecContext to see how this is generally done

    pings

    The set of pings which begin this propagation wave

    returns

    Some value of type P, dependent on the implementation

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