MyTwitterServer.scala

import com.twitter.finagle.{Http, ListeningServer, Service}
import com.twitter.finagle.http.{Status, Response, Request}
import com.twitter.server.TwitterServer
import com.twitter.util.{Await, Future}

class MyTwitterServer extends TwitterServer {
  val defaultHttpPortValue: String = ":8888"
  private val httpPortFlag =
    flag("http.port", defaultHttpPortValue, "External HTTP server port")
  private def responseString: String = "Hello, world!"
  private val service = Service.mk[Request, Response] { request =>
    val response =
      Response(request.version, Status.Ok)
    response.contentString = responseString
    Future.value(response)
  }
  def main(): Unit = {
    val server: ListeningServer = Http.server
      .withLabel("http")
      .serve(httpPortFlag(), service)
    info(s"Serving on port ${httpPortFlag()}")
    info(s"Serving admin interface on port ${adminPort()}")
    onExit {     
      Await.result(server.close())
    }
    Await.ready(server)
  }
}