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more docs for Sink.queue and actorRefWithAck (#25063)

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Konrad `ktoso` Malawski 2018-05-22 18:27:54 +09:00 • committed by Arnout Engelen
parent 8f40dc7f03
commit de04758bb8
7 changed files with 118 additions and 9 deletions
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33
akka-docs/src/test/scala/docs/stream/IntegrationDocSpec.scala
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@ -9,24 +9,21 @@ import akka.NotUsed
import scala.concurrent.duration._
import akka.testkit.AkkaSpec
import akka.stream.scaladsl._
import akka.stream.ActorMaterializer
import akka.stream._
import scala.concurrent.Future
import akka.testkit.TestProbe
import akka.actor.{ Actor, ActorLogging, ActorRef, Props, Status }
import com.typesafe.config.ConfigFactory
import akka.util.Timeout
import akka.stream.Attributes
import akka.stream.ActorAttributes
import scala.concurrent.ExecutionContext
import akka.stream.ActorMaterializerSettings
import java.util.concurrent.atomic.AtomicInteger
import akka.stream.Supervision
import akka.stream.scaladsl.Flow
import akka.Done
import akka.actor.Status.Status
import akka.stream.QueueOfferResult.{ Dropped, Enqueued }
object IntegrationDocSpec {
import TwitterStreamQuickstartDocSpec._
@ -476,4 +473,30 @@ class IntegrationDocSpec extends AkkaSpec(IntegrationDocSpec.config) {
"after: J"))
}
"illustrate use of source queue" in {
//#source-queue
val bufferSize = 5
val elementsToProcess = 3
val queue = Source
.queue[Int](bufferSize, OverflowStrategy.backpressure)
.throttle(elementsToProcess, 3.second)
.map(x ⇒ x * x)
.toMat(Sink.foreach(x ⇒ println(s"completed $x")))(Keep.left)
.run()
val source = Source(1 to 10)
implicit val ec = system.dispatcher
source.mapAsync(1)(x ⇒ {
queue.offer(x).map {
case QueueOfferResult.Enqueued ⇒ println(s"enqueued $x")
case QueueOfferResult.Dropped ⇒ println(s"dropped $x")
case QueueOfferResult.Failure(ex) ⇒ println(s"Offer failed ${ex.getMessage}")
case QueueOfferResult.QueueClosed ⇒ println("Source Queue closed")
}
}).runWith(Sink.ignore)
//#source-queue
}
}