Here is a more appropriately named version of the FlexiRoute subclass:
class OptionShape[A, B](_init: Init[(A, B)] = Name[(A, B)]("Option"))
extends FanOutShape[(A, B)](_init) {
val none = newOutlet[A]("optionNone")
val some = newOutlet[B]("optionSome")
protected override def construct(i: Init[(A, B)]) = new OptionShape(i)
}
class OptionRoute[A, B] extends FlexiRoute[(A, Option[B]), OptionShape[A,
Option[B]]](
new OptionShape, Attributes.name("Option")) {
import FlexiRoute._
override def createRouteLogic(p: PortT) = new RouteLogic[(A, Option[B])] {
override def initialState =
State[Any](DemandFromAll(p.none, p.some)) {
(ctx, _, element) =>
val (a, b) = element
b match {
case Some(i) => ctx.emit(p.some)(b)
case None => ctx.emit(p.none)(a)
}
SameState
}
override def initialCompletionHandling = eagerClose
}
}
--
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>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
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