Kill or timeout a Future in Scala 2.10

Question

Hi,

I\'m using Scala 2.10 with the new futures library and I\'m trying to write some code to test an infinite loop. I use a scala.concurrent.Future to r

Answer 1

Do not try it at home.

import scala.concurrent._
import scala.concurrent.duration._

class MyCustomExecutionContext extends AnyRef with ExecutionContext {
  import ExecutionContext.Implicits.global
  @volatile var lastThread: Option[Thread] = None
  override def execute(runnable: Runnable): Unit = {
    ExecutionContext.Implicits.global.execute(new Runnable() {
      override def run() {
        lastThread = Some(Thread.currentThread)
        runnable.run()
      }
    })
  }
  override def reportFailure(t: Throwable): Unit = ???
}    

implicit val exec = new MyCustomExecutionContext()
val f = future[Int]{ do{}while(true); 1 }
try {
  Await.result(f, 10 seconds) // 100% cpu here
} catch {
  case e: TimeoutException => 
    println("Stopping...")
    exec.lastThread.getOrElse(throw new RuntimeException("Not started"))
      .stop() // 0% cpu here
}