akka.stream.sciss.Util.scala Maven / Gradle / Ivy

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package akka.stream.sciss

import akka.stream.Materializer
import akka.stream.impl.{ActorMaterializerImpl, StreamSupervisor}
import akka.testkit.TestProbe

object Util {
  /** Prints a debugging string to the console,
    * including a GraphViz DOT representation of
    * the running graph.
    */
  def debugDotGraph()(implicit mat: Materializer): Unit =
    mat match {
      case impl: ActorMaterializerImpl ⇒
        val probe = TestProbe()(impl.system)
        impl.supervisor.tell(StreamSupervisor.GetChildren, probe.ref)
        val children = probe.expectMsgType[StreamSupervisor.Children].children
        println(s"children.size = ${children.size}")
        children.foreach(_ ! StreamSupervisor.PrintDebugDump)

      case other => sys.error(s"Not an instance of ActorMaterializerImpl: $other")
    }

//  def portToConn(in: GraphStageLogic): Array[Connection] = in.portToConn
}