akka-stream

I'm trying to use the Source.actorRef method to create an akka.stream.scaladsl.Source object. Something of the form import akka.stream.OverflowStrategy.fail import akka.stream.scaladsl.Source case class Weather(zip : String, temp : Double, raining : Boolean) val weatherSource = Source.actorRef[Weather](Int.MaxValue, fail) val sunnySource = weatherSource.filter(!_.raining) ... My question is: how do I send data to my ActorRef based Source object ? I assumed sending messages to the Source was something of the form //does not compile weatherSource ! Weather("90210", 72.0, false) weatherSource !

I would like to create a Source and later push elements on it, like in: val src = ... // create the Source here // and then, do something like this pushElement(x1, src) pushElement(x2, src) What is the recommended way to do this? Thanks! There are three ways this can be achieved: 1. Post Materialization with SourceQueue You can use Source.queue that materializes the Flow into a SourceQueue : case class Weather(zipCode : String, temperature : Double, raining : Boolean) val bufferSize = 100 //if the buffer fills up then this strategy drops the oldest elements //upon the arrival of a new element.