The same scala Task code works in sandbox but doesn't work in intelliJ

Question

Just try some simple Task examples. The following code works fine

import monix.eval.Task
import monix.execution.CancelableFuture
import monix.execution.Scheduler.Implicits.global

import scala.util.Success

val task = Task { 1 + 1 }
val cancellable = task.runAsync {
  case Right(result) => println(s"result is $result")
  case Left(err) => System.out.println(s"ERROR: ${err.getMessage}")
}

but using runToFuture works only in sandbox, not when i run it in intelliJ (of course in intelliJ i run it inside object)

val task = Task { 1 + 1 }

val future: CancelableFuture[Int] = task.runToFuture
future.onComplete {
  case Success(res) => println(s"result is: $res")
}

in intelliJ no printing 2, just

"C:\Program Files\Java\jdk1.8.0_192\bin\java.exe"

Process finished with exit code 0

What can be cause, i didn't expect stuck so early. Thanks in advance

The best would be to use `TaskApp` instead of calling any of the unsafe methods. — Luis Miguel Mejía Suárez, Sep 28 '20 at 12:42
@LuisMiguelMejíaSuárez, thanks, i just leartn and try simple things now — Dmitry Reutov, Oct 04 '20 at 13:37

score 1 · Accepted Answer · answered Sep 28 '20 at 07:27

1

When run as a stand-alone program, the program exits before the task completes, so you don't get any output. You need to wait for the task to complete.

Await.result(future, Duration.Inf)

answered Sep 28 '20 at 07:27

Tim

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ok, i got, it works, but if i use delay it does not work even with Await. Do you know why? `val task = Task { 1 + 1 }.delayExecution(1.second)` – Dmitry Reutov Sep 28 '20 at 07:38
Sorry, I'm not familiar with Monix so I'm not sure why that is. – Tim Sep 28 '20 at 07:56

The same scala Task code works in sandbox but doesn't work in intelliJ

1 Answers1