Akka 为什么actorSystem没有创建要与自定义调度程序一起运行的参与者

Hi在文件

application typed.conf

中有以下类型安全配置

    akka {
      loggers = ["akka.event.slf4j.Slf4jLogger"]
      loglevel = "DEBUG"
      logging-filter = "akka.event.slf4j.Slf4jLoggingFilter"
      actor {
        provider = "local"
      }
    }
    
    custom-thread-pool {
      type = Dispatcher
      executor = "thread-pool-executor"
      thread-pool-executor {
        fixed-pool-size = 40
      }
      throughput = 2
    }

下面是akka类型的演员代码

    import akka.actor.typed.{ActorSystem, Behavior, DispatcherSelector, PostStop, Signal}
    import akka.actor.typed.scaladsl.AbstractBehavior
    import akka.actor.typed.scaladsl.ActorContext
    import akka.actor.typed.scaladsl.Behaviors
    import com.typesafe.config.ConfigFactory
    import scala.concurrent.ExecutionContext
    
    trait PrintMessage
    case class PrintMessageAny(x: Any) extends PrintMessage
    
    object PrintMeActor {
      def apply(): Behavior[PrintMessage] =
        Behaviors.setup[PrintMessage](context => new PrintMeActor(context))
    }
    
    class PrintMeActor(context: ActorContext[PrintMessage]) extends AbstractBehavior[PrintMessage](context) {
      val dispatcherSelector: DispatcherSelector = DispatcherSelector.fromConfig("custom-thread-pool")
      implicit val executionContext: ExecutionContext = context.system.dispatchers.lookup(dispatcherSelector)
    
      println(s"PrintMeActor Application started in Thread ${Thread.currentThread().getName}")
    
      override def onMessage(msg: PrintMessage): Behavior[PrintMessage] = {
        // No need to handle any messages
        println(s"Got $msg in Thread ${Thread.currentThread().getName}")
        Behaviors.same
      }
    
      override def onSignal: PartialFunction[Signal, Behavior[PrintMessage]] = {
        case PostStop =>
          context.log.info("PrintMeActor Application stopped")
          this
      }
    }
    
    object TestTypedActorApp extends App {
      val config = ConfigFactory.load("application-typed.conf")
      val as: ActorSystem[PrintMessage] = ActorSystem(PrintMeActor(), "PrintAnyTypeMessage", config)
      as.tell(PrintMessageAny("test"))
      Thread.sleep(2000)
    }

当我运行代码时，我得到以下输出

PrintMeActor应用程序在线程PrintAnyTypeMessage-akka.actor.default-dispatcher-6中启动 在线程PrintAnyTypeMessage-akka.actor.default-dispatcher-6中获取了PrintMessageAny（测试）

---

我想让这个演员在自定义线程池上运行，但它没有发生。如何实现相同的功能？

在生成调度程序时，通过传递与所需调度程序对应的

akka.actor.typed.DispatcherSelector

（扩展了

akka.actor.typed.Props

）将调度程序与actor关联起来

在自定义调度程序上生成

ActorSystem

时，只能通过采用

Config

或

ActorSystemSetup

的重载传递

Props

如果希望为用户guardian actor（具有您传递到

ActorSystem

的行为的actor）覆盖actor，则将该dispatcher设置为默认dispatcher可能更有意义：

 akka.actor.default-dispatcher {
   executor = "thread-pool-executor"

   thread-pool-executor {
     fixed-pool-size = 40
   }
   throughput = 2
 }