PlayFramework 2.4，Actor 注入问题：没有启动的应用程序

Question

有人问过，但我觉得它不是很有帮助。我正在将 MyRepository 注入 MyActor。启动时，出现以下异常：

[error] - akka.actor.OneForOneStrategy - Unable to provision, see the following errors:

1) Error injecting constructor, java.lang.RuntimeException: There is no started application
  at infrastructure.repository.MyRepository.<init>(MyRepository.scala:13)
  at infrastructure.repository.MyRepository.class(MyRepository.scala:13)
  while locating infrastructure.repository.MyRepository
    for parameter 0 at service.command.MyActor.<init>(MyActor.scala:38)
  at service.command.MyActor.class(MyActor.scala:38)
  while locating service.command.MyActor

1 error
akka.actor.ActorInitializationException: exception during creation
        at akka.actor.ActorInitializationException$.apply(Actor.scala:172) ~[akka-actor_2.11-2.4.0.jar:na]
        at akka.actor.ActorCell.create(ActorCell.scala:605) ~[akka-actor_2.11-2.4.0.jar:na]
        at akka.actor.ActorCell.invokeAll(ActorCell.scala:460) ~[akka-actor_2.11-2.4.0.jar:na]
        at akka.actor.ActorCell.systemInvoke(ActorCell.scala:482) ~[akka-actor_2.11-2.4.0.jar:na]
        at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282) [akka-actor_2.11-2.4.0.jar:na]
        at akka.dispatch.Mailbox.run(Mailbox.scala:223) [akka-actor_2.11-2.4.0.jar:na]
        at akka.dispatch.Mailbox.exec(Mailbox.scala:234) [akka-actor_2.11-2.4.0.jar:na]
        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [scala-library-2.11.7.jar:na]
        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [scala-library-2.11.7.jar:na]
Caused by: com.google.inject.ProvisionException: Unable to provision, see the following errors:
.... [same thing]

我已按照说明进行操作，并且我有一个类似

的模块

class InjectionModule extends AbstractModule with AkkaGuiceSupport {
  def configure = {
    bindActor[MyActor]("my-actor")
  }
}

这是 MyRepository 的代码：

@Singleton
class MyRepository @Inject()(val reactiveMongoApi: ReactiveMongoApi) extends Repository {

  // init db connection
  override val collection = getCollection(reactiveMongoApi, "card")

  def getById(id: CardId) = get(Json.obj(Entity.JSON_KEY_ID -> id.toString))

  // .. other similar methods
}


abstract class Repository {
  val collection: JSONCollection

  val dbName = current.configuration.getString("mongodb.database.name").getOrElse("")

  protected def getCollection(reactiveMongoApi: ReactiveMongoApi, name: String) =
    reactiveMongoApi.connection.db(dbName, FailoverStrategy(initialDelay = 1.second, retries = 20)).collection[JSONCollection](name)

  protected def get(query: JsObject): Future[Either[String, Option[A]]] = {
    collection.find(query).one[A].map {
      case Some(a) => Right(Some(a))
      case None => Right(None)
    }.recover { case t => Left(t.getMessage) }
  }

  // ... similar methods
}

这是 MyActor 的 'opening line'：

@Singleton
class MyActor @Inject()(cardViewRepository: CardViewRepository) extends Actor {
  //.. actor methods
}

有趣的是，它曾经可以正常工作，但突然抛出了这个异常。可能是因为我从 2.4.3 升级到 2.4.6？

Answer 1

@Salem 在评论中是正确的："Probably the problem is with current as stated above. Try to inject Configuration in your MyRepository class and use in instead of current.configuration. If you really need the application object I think you can inject it instead... " 我需要在 MyRepository 中注入配置。

PlayFramework 2.4，Actor 注入问题：没有启动的应用程序

PlayFramework 2.4, Actor injection issue: There is no started application

dependency-injection

scala

actor

playframework