In researching how to do this I came across akka.stream.io.OutputStreamSink which is exactly what I need: https://github.com/akka/akka/blob/releasing-akka-stream-and-http-experimental-1.0-RC3/akka-stream/src/main/scala/akka/stream/io/OutputStreamSink.scala
The code snippet is very simple: val outputStream: () => OutputStream = { () => { val pipedOutputStream = new PipedOutputStream() //do something with the piped output stream, like connect it to a read stream //return for later pipedOutputStream } //somewhere else, maybe in a route: akkaHttpRequest.entity.getDataBytes.runWith(OutputStreamSink(outputStream), flow) -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.