Spray Session 
Provide session management for Spray applications. There are three session managers implemented:
- In memory sessions (stateful session manager),
- Session saved in a redis server (stateful session manager, optional dependency on redisreact),
- Cookie baked sessions (stateless session manager).
One can easily add new session managers by implementing the trait spray.routing.session.StatefulSessionManager or spray.routing.session.StatelessSessionManager
depending on .
To get access to the session directives you can extend either the trait spray.routing.directives.StatefulSessionDirectives or spray.routing.directives.StatelessSessionDirectives.
Sample Code
Below are two code snippets showing how the session directives can be used. The first one demonstrates the use of a stateful session manager, and the second one how to use a stateless session manager.
import spray.routing._
import session._
import directives._
import akka.actor.ActorSystem
import akka.util.Timeout
import scala.concurrent.duration._
import com.typesafe.config.ConfigFactory
class MyService(implicit val actorRefFactory: ActorSystem) extends HttpService with StatefulSessionManagerDirectives[Int] {
val config = ConfigFactory.load()
import actorRefFactory.dispatcher
implicit val timeout = Timeout(20.seconds)
implicit val manager = new InMemorySessionManager[Int](config)
val route =
cookieSession() { (id, map) =>
get {
val result = map.getOrElse("value", 0)
updateSession(id, map.updated("value", result + 1)) {
complete(result.toString)
}
} ~
delete {
invalidateSession(id) {
complete("ok")
}
}
}
}import spray.routing._
import session._
import directives._
import akka.actor.ActorSystem
import com.typesafe.config.ConfigFactory
class MyService(implicit val actorRefFactory: ActorSystem) extends HttpService with StatelessSessionManagerDirectives[String] {
val config = ConfigFactory.load()
import actorRefFactory.dispatcher
implicit val manager = new CookieBakerSessionManager(config)
val route =
cookieSession() { map =>
get {
val result = map.getOrElse("value", "0")
setCookieSession(map.updated("value", (result.toInt + 1).toString)) {
complete(result)
}
} ~
delete {
invalidate() {
complete("ok")
}
}
}
}