Playing with akka-typed / published by https://github.com/dacr/code-examples-manager #5f834595-1e09-439f-b6de-49a85186799b/8fbec65a7314ab093d8fccb3e834d1bc698b1c3c

akka-typed-actors-hello-world.sc

// summary : Playing with akka-typed
// keywords : scala, actors, akka, akka-typed, helloworld, @testable
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : 5f834595-1e09-439f-b6de-49a85186799b
// created-on : 2019-12-11T08:53:57Z
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala  "3.3.0"
//> using dep "com.typesafe.akka::akka-actor-typed:2.6.21"
//> using dep "org.scalatest::scalatest:3.2.16"
//> using dep "org.slf4j:slf4j-simple:2.0.7"
// ---------------------

import org.scalatest._, flatspec._, matchers._
import akka.actor.typed.scaladsl.Behaviors
import akka.actor.typed.{ActorRef, ActorSystem, Behavior}

object HelloWorld {

  final case class Greet(whom: String, replyTo: ActorRef[HelloWorldMain.MainMessage])

  def apply(): Behavior[Greet] = Behaviors.receive { (context, message) =>
    context.log.info("Hello {}!", message.whom)
    message.replyTo ! HelloWorldMain.Greeted(message.whom, context.self)
    Behaviors.same
  }
}

object HelloWorldMain {

  sealed trait MainMessage

  final case class Start(name: String) extends MainMessage

  final case class Greeted(whom: String, from: ActorRef[HelloWorld.Greet]) extends MainMessage

  def apply(): Behavior[MainMessage] =
    Behaviors.setup { context =>
      val greeter = context.spawn(HelloWorld(), "greeter")

      Behaviors.receiveMessage {
        case message: Start =>
          println(message)
          greeter ! HelloWorld.Greet(message.name, context.self)
          Behaviors.same
        case message: Greeted =>
          println(message)
          context.log.info("Received {}", message.whom)
          Behaviors.stopped
      }
    }
}


object AkkaTypedTest extends AsyncFlatSpec with must.Matchers {
  override def suiteName: String = "AkkaTypedTest"

  "AkkaTyped" must "succeed" in {
    val system: ActorSystem[HelloWorldMain.MainMessage] = ActorSystem(HelloWorldMain(), "hello")
    implicit val ec = system.executionContext
    //system ! HelloWorldMain.Start("Me")
    system ! HelloWorldMain.Start("Me")
    system.whenTerminated.map(_ => succeed)
  }
}

AkkaTypedTest.execute()