experiments/akkastream/src/main/scala/akka/stream/gearpump/example/Test2.scala

/*
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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
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 * See the License for the specific language governing permissions and
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package akka.stream.gearpump.example

import scala.concurrent.Await
import scala.concurrent.duration.Duration

import akka.actor.{Actor, ActorSystem, Props}
import akka.stream.ActorMaterializer
import akka.stream.gearpump.GearpumpMaterializer
import akka.stream.gearpump.scaladsl.{GearSink, GearSource}
import akka.stream.scaladsl.{Flow, Sink, Source}

/**
 *
 * This tests how different Materializers can be used together in an explicit way.
 * Usage: output/target/pack/bin/gear app -jar experiments/akkastream/target/scala.11/akkastream-2.11.5-0.6.2-SNAPSHOT-assembly.jar
 *
 */
object Test2 {

  def main(args: Array[String]): Unit = {

    println("running Test2...")
    implicit val system = ActorSystem("akka-test")
    val materializer = new GearpumpMaterializer(system)

    val echo = system.actorOf(Props(new Echo()))
    val source = GearSource.bridge[String, String]
    val sink = GearSink.bridge[String, String]

    val flow = Flow[String].filter(_.startsWith("red")).map("I want to order item: " + _)
    val (entry, exit) = flow.runWith(source, sink)(materializer)

    val actorMaterializer = ActorMaterializer()

    val externalSource = Source(List("red hat", "yellow sweater", "blue jack", "red apple", "green plant", "blue sky"))
    val externalSink = Sink.actorRef(echo, "COMPLETE")

    val graph = FlowGraph.closed() { implicit b =>
      externalSource ~> Sink(entry)
      Source(exit) ~> externalSink
    }
    graph.run()(actorMaterializer)

    Await.result(system.whenTerminated, Duration.Inf)
  }

  class Echo extends Actor {
    def receive: Receive = {
      case any: AnyRef =>
        println("Confirm received: " + any)
    }
  }
}