Is there a standard Scala function for running a block with a timeout?

Question

I need to call into a service that may or not return timely results. I\'d like to be able to write

val result = runWithTimeout(5000, valReturnedOnTimeout) {         


        

Answer 1

You could use a future

import scala.actors.Futures._  

val myfuture = 
    future {
     Thread.sleep(5000)
     println("")
     "future "
 }

 awaitAll(300,myfuture ) foreach println _   

But also have a look at Circuit Breaker for Scala which is a implementation of the Circuit Breaker Pattern. Basically it lets you control the timeout and what should happen if a failure occurs accessing an external resource

Usage looks like this in Scala (from the readme) :

. . .
addCircuitBreaker("test", CircuitBreakerConfiguration(timeout=100,failureThreshold=10))
. . .


class Test extends UsingCircuitBreaker {
  def myMethodWorkingFine = {
    withCircuitBreaker("test") {
      . . .
    }
  }

  def myMethodDoingWrong = {
    withCircuitBreaker("test") {
      require(false,"FUBAR!!!")
    }
  }
}