I'm wondering how does @Inject annotation in Play-Scala works. It obviously injects a dependency, but I'm curious how is it working. When I was using it on class extending controller and set routes generator to injectroutesgenerator it seems to autmagically create objects from those classes, but how do I use it in other context?
I tried:
@Inject val mailer: MailerClient = null
But that doesn't seem to work. Are there any posibilities to @Inject things (that mailerClient, WS ets.) directly to a value, not to controller class?
Looks close. Change val to var because it is not final and needs to be injected at a latter stage.
@Inject var mailer: MailerClient = null
I'd check also that the MailerClient library is mentioned as a dependency in the project configuration. You could try with WSClient instead as it's included by default in the template:
@Inject var ws: WSClient = null
Especially as I know that this particular one works.
Update
Created a demo on GitHub which is the Play-Scala template with the index method changed as follows:
import play.api._
import play.api.libs.ws.WSClient
import play.api.mvc._
import play.api.libs.concurrent.Execution.Implicits.defaultContext
class Application extends Controller {
@Inject var ws: WSClient = null
def index = Action.async {
ws.url("http://google.com").get.map(r => Ok(r.body))
}
}
