package triad import akka.NotUsed import akka.stream.scaladsl.{BroadcastHub, Keep, Source, SourceQueueWithComplete} import akka.stream.{Materializer, OverflowStrategy} class LiveMessages(implicit materializer: Materializer) { private val (in: SourceQueueWithComplete[Message], out: Source[Message, NotUsed]) = Source .queue[Message](10, OverflowStrategy.dropTail) .toMat(BroadcastHub.sink[Message])(Keep.both) .run() def push(message: Message) = in.offer(message) def feed = out }