73 lines
1.9 KiB
Scala
73 lines
1.9 KiB
Scala
/**
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* Copyright (C) 2009-2012 Typesafe Inc. <http://www.typesafe.com>
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*/
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package docs.dataflow
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import language.postfixOps
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import scala.concurrent.util.duration._
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import scala.concurrent.{ Await, Future, Promise }
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import org.scalatest.WordSpec
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import org.scalatest.matchers.MustMatchers
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import scala.util.{ Try, Failure, Success }
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class DataflowDocSpec extends WordSpec with MustMatchers {
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//#import-akka-dataflow
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import akka.dataflow._ //to get the flow method and implicit conversions
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//#import-akka-dataflow
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//#import-global-implicit
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import scala.concurrent.ExecutionContext.Implicits.global
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//#import-global-implicit
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"demonstrate flow using hello world" in {
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def println[T](any: Try[T]): Unit = any.get must be === "Hello world!"
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//#simplest-hello-world
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flow { "Hello world!" } onComplete println
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//#simplest-hello-world
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//#nested-hello-world-a
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flow {
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val f1 = flow { "Hello" }
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f1() + " world!"
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} onComplete println
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//#nested-hello-world-a
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//#nested-hello-world-b
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flow {
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val f1 = flow { "Hello" }
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val f2 = flow { "world!" }
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f1() + " " + f2()
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} onComplete println
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//#nested-hello-world-b
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}
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"demonstrate the use of dataflow variables" in {
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def println[T](any: Try[T]): Unit = any.get must be === 20
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//#dataflow-variable-a
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flow {
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val v1, v2 = Promise[Int]()
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// v1 will become the value of v2 + 10 when v2 gets a value
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v1 << v2() + 10
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v2 << flow { 5 } // As you can see, no blocking!
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v1() + v2()
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} onComplete println
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//#dataflow-variable-a
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}
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"demonstrate the difference between for and flow" in {
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def println[T](any: Try[T]): Unit = any.get must be === 2
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//#for-vs-flow
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val f1, f2 = Future { 1 }
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val usingFor = for { v1 ← f1; v2 ← f2 } yield v1 + v2
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val usingFlow = flow { f1() + f2() }
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usingFor onComplete println
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usingFlow onComplete println
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//#for-vs-flow
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}
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}
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