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Demonstrating a basic linear data flow using Akka Streams
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| import akka.actor.ActorSystem | |
| import akka.stream._ | |
| import akka.stream.scaladsl._ | |
| // implicit actor system | |
| implicit val system = ActorSystem("Sys") | |
| // implicit actor materializer | |
| implicit val materializer = ActorMaterializer() | |
| def main(args: Array[String]): Unit = { | |
| val g: RunnableGraph[_] = RunnableGraph.fromGraph(GraphDSL.create() { | |
| implicit builder => | |
| // Source | |
| val A: Outlet[String] = builder.add(Source.fromIterator(() => flightDelayLines)).out | |
| val B: FlowShape[String, FlightEvent] = builder.add(csvToFlightEvent) | |
| val C: Inlet[Any] = builder.add(Sink.ignore).in | |
| import GraphDSL.Implicits._ // allows us to build our graph using ~> combinators | |
| // Graph | |
| A ~> B ~> C | |
| ClosedShape // defines this as a "closed" graph, not exposing any inlets or outlets | |
| }) | |
| g.run() // materializes and executes the blueprint | |
| } |
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