Connection refused when running multiple NettyServer with play 2.5 - scala

Question

I'm currently migrating from play 2.4 to 2.5.
I'm trying to run many NettyServer in a test but I can only access the last created
import akka.actor.ActorSystem
import akka.stream.ActorMaterializer
import org.scalatest.{FlatSpec, Matchers}
import org.scalatest.concurrent.ScalaFutures
import org.scalatest.time.{Seconds, Span}
import play.api.libs.ws.ahc.AhcWSClient
import play.api.mvc.{Action, Results}
import play.core.server.{NettyServer, ServerConfig}
import play.api.routing.sird._
class NettyServerTest extends FlatSpec with Matchers with ScalaFutures {
override implicit val patienceConfig = PatienceConfig(Span(5, Seconds))
implicit val system = ActorSystem()
implicit val materializer = ActorMaterializer()
private val wsClient = AhcWSClient()
it should "print 'Hello I am the secondServer' then 'Hello I am the firstServer'" in {
val firstServer = createServer("firstServer")
val secondServer = createServer("secondServer")
try {
println(wsClient.url(s"http://localhost:${secondServer.httpPort.get}/hello").get().futureValue.body)
println(wsClient.url(s"http://localhost:${firstServer.httpPort.get}/hello").get().futureValue.body)
} finally {
firstServer.stop()
secondServer.stop()
}
}
def createServer(server: String): NettyServer = {
NettyServer.fromRouter(ServerConfig(port = Some(0))) {
case GET(p"/hello") => Action {
Results.Ok(s"Hello I am the $server")
}
}
}
}
When I run the test it only prints 'Hello I am the secondServer' then I get the error:
The future returned an exception of type: java.net.ConnectException, with message: Connection refused: no further information: localhost/0:0:0:0:0:0:0:1:58096.
ScalaTestFailureLocation: NettyServerTest$$anonfun$1 at (NettyServerTest.scala:28)
org.scalatest.exceptions.TestFailedException: The future returned an exception of type: java.net.ConnectException, with message: Connection refused: no further information: localhost/0:0:0:0:0:0:0:1:58096.
at org.scalatest.concurrent.Futures$FutureConcept$class.tryTryAgain$1(Futures.scala:531)
at org.scalatest.concurrent.Futures$FutureConcept$class.futureValue(Futures.scala:558)
at org.scalatest.concurrent.ScalaFutures$$anon$1.futureValue(ScalaFutures.scala:74)
at NettyServerTest$$anonfun$1.apply$mcV$sp(NettyServerTest.scala:28)
at NettyServerTest$$anonfun$1.apply(NettyServerTest.scala:22)
...
I have the following dependencies:
"com.typesafe.play" %% "play-netty-server" % "2.5.4"
"com.typesafe.play" %% "play-ws" % "2.5.4"
This test was working with play 2.4

Answer 1

Finally I succeed to make it work by overriding the actorSystem used by the netty server:
import akka.actor.ActorSystem
import akka.stream.ActorMaterializer
import org.scalatest.concurrent.ScalaFutures
import org.scalatest.time.{Seconds, Span}
import org.scalatest.{FlatSpec, Matchers}
import play.api.BuiltInComponents
import play.api.libs.ws.ahc.AhcWSClient
import play.api.mvc.{Action, Results}
import play.api.routing.Router
import play.api.routing.sird._
import play.core.server.{NettyServer, NettyServerComponents, ServerConfig}
class NettyServerTest extends FlatSpec with Matchers with ScalaFutures {
override implicit val patienceConfig = PatienceConfig(Span(5, Seconds))
implicit val system = ActorSystem()
implicit val materializer = ActorMaterializer()
private val wsClient = AhcWSClient()
it should "print 'Hello I am the secondServer' then 'Hello I am the firstServer'" in {
val firstServer = createServer("firstServer")
val secondServer = createServer("secondServer")
try {
wsClient.url(s"http://localhost:${firstServer.httpPort.get}/hello").get().futureValue.body shouldBe "Hello I am the firstServer"
wsClient.url(s"http://localhost:${secondServer.httpPort.get}/hello").get().futureValue.body shouldBe "Hello I am the secondServer"
} finally {
firstServer.stop()
secondServer.stop()
}
}
def createServer(serverName: String): NettyServer = {
new NettyServerComponents with BuiltInComponents {
lazy val router = Router.from {
case GET(p"/hello") => Action {
Results.Ok(s"Hello I am the $serverName")
}
}
override lazy val serverConfig = ServerConfig(port = Some(0))
override lazy val actorSystem: ActorSystem = ActorSystem()
}.server
}
}