How to access Play Framework 2.4 guice Injector in application?

Question

I want to use the getInstance method of the Guice Injector class in Play Framework 2.4, how can I access it?

I have used the Guice Fa

Answer 1

Apart from the other Play 2.5.x solutions, there may be a situation in which you want to get the Injector in an object without using injection. For example when you're using a Scala singleton, for which @inject probably doesn't work.

In that case, you can use this:

@Singleton
class GlobalContext @Inject()(injector: Injector) {
  GlobalContext.injector = injector
}

object GlobalContext {
  private var injector: Injector = null  
}

With a Guice module to set the singleton to eager, otherwise it won't be initialized automatically:

// Module.scala
class Module extends AbstractModule {
  override def configure() = {
    // ...

    // Eager initialize Context singleton
    bind(classOf[GlobalContext]).asEagerSingleton()
  }
}