Retrieving port number in Play Framework 2 app

Question

The question is: how do I retrieve the port number that play is listening on, no matter how it was defined (configuration, command line argument, or not at all).

Thi

Answer 1

I'm using this Scala snippet to determine Play's listen port. Unfortunately I had to hard code some default values, in case -Dhttp.port=... is not specified.

val listenPort =
  if (!Play.isTest) {
    System.getProperty("http.port", "9000")
  }
  else {
    // Not on classpath: play.api.test.Helpers.testServerPort
    // Instead, duplicate its implementation here:
    System.getProperty("testserver.port", "19001")
  }

I also wonder if there is no better way, e.g. Play.port but I haven't found anything — well except for your question :-)

(In your example, it should be -Dhttp.port=80 not -Dhttp.port 80.)