akka - 针对不同类型演员的 Akka 主管策略

Question

我正在使用 Akka，我想为 User Guardian 演员定义我自己的监督策略。我定义了两种类型的actor，称为​​TaskActor 和MessageActor。它们被实例化为顶级演员。我希望用户监护人应用以下监督策略：当他们抛出异常时停止 TaskActor 并恢复 MessageActor（我不介意抛出什么特定类型的异常）。我该怎么做？

Answer 1

我找到了以下解决方案：

object ActorClassUtil {

  val ACTORS_PACKAGE = "utils.actors."
  val TASK_ACTOR_CLASS_NAME  = ACTORS_PACKAGE + "TaskActor"
  val MSG_ACTOR_CLASS_NAME     = ACTORS_PACKAGE + "MessageActor"


  def getFailedActorClassFrom(e: Exception): String = {

    val stackTrace = e.getStackTrace

    // FQCN (Fully Qualified Class Name)
    stackTrace(0) getClassName

  }

}

class UserGuardianSupervisorStrategy extends SupervisorStrategyConfigurator {
  import ActorClassUtil._

  def create(): OneForOneStrategy = {
    OneForOneStrategy(maxNrOfRetries = 20, withinTimeRange = 1 minute) {
      case _: ActorInitializationException  => Stop
      case _: ActorKilledException          => Stop
      case _: DeathPactException            => Stop

      case exception: Exception =>

        val actorClassName = getFailedActorClassFrom(exception)

        if (actorClassName startsWith TASK_ACTOR_CLASS_NAME)
          Stop
        else
          if (actorClassName startsWith MSG_ACTOR_CLASS_NAME)
            Resume
          else
            Stop

    }
  }
}