ZIO learning - fiber based concurrency model - using fork and join / published by https://github.com/dacr/code-examples-manager #9b586f61-3106-467f-b35e-75910cf36d88/ec3dc260230ed0d054040dc6707435af333ac0d4

zio-learning-7-concurrency-2-forkjoin.sc

// summary : ZIO learning - fiber based concurrency model - using fork and join
// keywords : scala, zio, learning, pure-functional, @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 : 9b586f61-3106-467f-b35e-75910cf36d88
// created-on : 2021-04-02T15:36:11+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala  "3.2.2"
//> using dep "dev.zio::zio:2.0.13"
// ---------------------
import zio.*

object ThatApp extends ZIOAppDefault {
  // using fork & join - semantically block but never block underlying threads

  val logic1 = for {
    _ <- Console.printLine("hello")
  } yield ()

  val logic2 = for {
    _ <- Console.printLine("world")
  } yield ()

  val run = for {
    a <- logic1.repeat(Schedule.recurs(5) && Schedule.spaced(50.millis)).fork
    b <- logic2.repeat(Schedule.recurs(5) && Schedule.spaced(50.millis)).fork
    _ <- a.join // because we don't want to exit before completion ;)
    _ <- b.join // because we don't want to exit before completion ;)
  } yield ()

}
// -------------------------------------------------------------
ThatApp.main(Array.empty)