Where is GuiceApplicationBuilder? - scala

Question

I am currently trying to set up a Play2 application with dependency injection, with information from the official docs. However, my IDE cannot find GuiceApplicationBuilder. So which additional entry for libraryDependencies do I have to specify to get this builder?
EDIT: I made a screenshot of what happens when I try to import the things stated by #anquegi
EDIT 2: The problem was very simple: I used the wrong version of Play - 2.3.8 did in fact not have these, I had to use 2.4.0-RC2 to get it to work.

Answer 1

At the dependencies in the play docs /ScalaDependencyInjection you must import this
import play.api.ApplicationLoader
import play.api.Configuration
import play.api.inject._
import play.api.inject.guice._
This is the compile code in the section Advanced: Extending the GuiceApplicationLoader, so you need to use this extending in your class:
import play.api.ApplicationLoader
import play.api.Configuration
import play.api.inject._
import play.api.inject.guice._
class CustomApplicationLoader extends GuiceApplicationLoader() {
override def builder(context: ApplicationLoader.Context): GuiceApplicationBuilder = {
val extra = Configuration("a" -> 1)
initialBuilder
.in(context.environment)
.loadConfig(extra ++ context.initialConfiguration)
.overrides(overrides(context): _*)
}
}