app/controllers/Controller.scala

package play.api.mvc.legacy

import play.api.mvc._

class Controller extends BaseController {

  override protected def controllerComponents: ControllerComponents = {
    Controller.components /* we don't null check here to avoid the cost associated to it - we expect dev to have done the init properly */
  }

}

object Controller {

    private var components: ControllerComponents = null

    /**
     * This need to be called when you initialise the app in app compoments
     */
    def init(c: ControllerComponents) = {
      components = c
    }

}