As an introductory example, we will see how to use a future just for a simple operation: we will add two integers and use a future to run this operation asynchronously.
To step through this recipe, we will need to import the Hello-Akka project; all other prerequisites are the same as before.
For this recipe, we will need to perform the following steps:
- Create a file, such as
AddFuture.scala, in thecom.packt.chapter4package. - Add the following imports to the top of the file:
import scala.concurrent.duration._
import scala.concurrent.{Await, Future}
import scala.concurrent.ExecutionContext.Implicits.global - Create a test application, as follows:
object AddFuture extends App {
val future = Future(1+2).mapTo[Int]
val sum = Await.result(future, 10 seconds)
println(s"Future Result $sum")
}