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ZIO learning - promise allow one fiber to communicate with an other one / published by https://github.com/dacr/code-examples-manager #1a10f606-24f5-45a1-9577-dad815cd2146/55e531df7cf17ef19e208266234e772fc107f64
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// summary : ZIO learning - promise allow one fiber to communicate with an other one | |
// 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 : 1a10f606-24f5-45a1-9577-dad815cd2146 | |
// created-on : 2021-04-06T15:32:12+02:00 | |
// managed-by : https://github.com/dacr/code-examples-manager | |
// run-with : scala-cli $file | |
// --------------------- | |
//> using scala "3.2.2" | |
//> using dep "dev.zio::zio:2.0.13" | |
// --------------------- | |
/* | |
inspired from | |
- [John A De Goes - ZIO: Next-Generation Effects in Scala](https://www.youtube.com/watch?v=mkSHhsJXjdc) | |
- +35:00 | |
*/ | |
import zio.* | |
object Encapsulated extends ZIOAppDefault { | |
def completeWhenReady[E](promise: Promise[E, Int]) = { | |
Clock.sleep(100.millis).flatMap { case x => | |
promise.complete(ZIO.succeed(42)) | |
} | |
} | |
def run = for { | |
p <- Promise.make[Error, Int] | |
_ <- completeWhenReady(p).fork | |
_ <- Clock.sleep(50.millis) // do so work | |
result <- p.await | |
_ <- Console.printLine(s"result=$result") | |
} yield result | |
} | |
// ------------------------------------------------------------- | |
Encapsulated.main(Array.empty) |
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