Using a future directly for a simple operation

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.

Getting ready

To step through this recipe, we will need to import the Hello-Akka project; all other prerequisites are the same as before.

How to do it...

For this recipe, we will need to perform the following steps:

1. Create a file, such as AddFuture.scala, in the com.packt.chapter4 package.
2. 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 

3. 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") 
        } 

How it works...

In the preceding recipe, we computed the sum of...