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Simple akka hello world example / published by https://github.com/dacr/code-examples-manager #7e4e8d31-f6f0-494b-b609-8516b2277bb3/d36052d16920ac87d89ed05d9b98fb751ede14ff
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// summary : Simple akka hello world example | |
// keywords : scala, actors, akka, 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 : 7e4e8d31-f6f0-494b-b609-8516b2277bb3 | |
// created-on : 2020-06-30T15:26:28Z | |
// 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:2.6.21" | |
// --------------------- | |
import scala.concurrent.{ExecutionContextExecutor, Await} | |
import scala.concurrent.duration.Duration | |
import akka.actor.{Actor, ActorRef, ActorSystem, PoisonPill, Props, Terminated} | |
// import akka.pattern.ask // Required to get responses using ? (but take care, of course...) | |
// --------------------------------------------------------------------------- | |
object A { | |
case class Start() | |
case class AMsg(txt:String) | |
def props(b: ActorRef) = Props(new A(b)) | |
} | |
class A(b: ActorRef) extends Actor { | |
override def receive = { | |
case A.Start() => | |
b ! B.BMsg("hello world") | |
//sender ! "OK" | |
case A.AMsg(txt) => | |
println(s"B says $txt") | |
context.system.terminate() | |
case x => | |
println(s"Unsupported message received $x") | |
} | |
} | |
// --------------------------------------------------------------------------- | |
object B { | |
case class BMsg(txt:String) | |
def props() = Props(new B()) | |
} | |
class B() extends Actor { | |
override def receive = { | |
case B.BMsg(txt) => | |
sender() ! A.AMsg(s"message size is ${txt.size} for $txt") | |
} | |
} | |
// --------------------------------------------------------------------------- | |
object Toto { | |
val system = ActorSystem("HalSystem") | |
//implicit val executionContext: ExecutionContextExecutor = system.dispatcher | |
val b = system.actorOf(B.props()) | |
val a = system.actorOf(A.props(b)) | |
a ! A.Start() | |
//val rcf = (a ? A.Start()) (Timeout(10, TimeUnit.SECONDS)) | |
//rcf.foreach(rc => println(rc)) | |
} | |
Toto.system // Just to boot as object inits (statics) are lazy | |
Await.result(Toto.system.whenTerminated, Duration.Inf) |
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