使用Akka的Scala异步计算

Question

im trying to design a program that will get a set of inputs (lets say some numbers)

it would do some calculation on each of the input and gather the result

I need this to be asynchronous calculation.

Looked into scala and akka and it looks perfect but i cant seem to understand the design of my actors and who will do that ?

for example : create 1 actor for each calc ? and 1 actor to collect all the results ?

any idea or documentations for designs using akka ?

Thanks!

Answer 1

Look at this sample project

this is a example for a akka actor system that has 1 actor that gets a input set

for each input is will create a child actor that will calculate this and in the end will show the results from all the child actors

readme : https://github.com/Nimrod007/Akka-Compute

code : https://github.com/Nimrod007/Akka-Compute/blob/master/akkaComputeExample/src/main/scala/AkkaComputeApp.scala

Answer 2

I'm not answering your question directly since Nimrod007 already did it. I'm not sure what your actual application is, but I just wanted to show you that using straight Futures might be a lot simpler.

import scala.concurrent._
import scala.concurrent.duration._
import ExecutionContext.Implicits.global

object Example extends App {
  val futures = Range(1, 5).map(i => Future { i + 10 })
  val result = Future.fold(futures)(List.empty[Int])((answers, value) => value :: answers)
  result.onComplete(answersTry => answersTry.foreach(println))
  Thread.sleep(1000)
}

It does the same as Nimrod007's code, but is an awful lot shorter.

I don't mean that you should not use Akka. But you should consider what is the most appropriate for your application.