Scala 一旦参与者重新启动，如何从主管向参与者发送消息？

要求？
-必须有一个长期运行的进程（守护进程），该进程应该永远运行
-如果出现异常，应重新启动，但如果再次失败两次，则不应重新启动

我面临的问题？
-参与者已重新启动，但没有再次发送消息

我有什么？

package com.learner.ahka.runforever

import akka.actor.ActorSystem
import com.typesafe.config.ConfigFactory

object RaceEvent extends App {
  val config = ConfigFactory.parseString( """
    akka.loglevel = "DEBUG"
    akka.actor.debug {
      receive = on
      lifecycle = on
    }
                                          """)
  val system = ActorSystem.create("race", config)
  val coach = system.actorOf(Coach.props(), "coach")
  coach ! GetSetGo
}

package com.learner.ahka.runforever

import akka.actor.SupervisorStrategy.{Escalate, Restart}
import akka.actor._
import akka.event.LoggingReceive

import scala.concurrent.duration._

case object GetSetGo

object Coach {
  def props(): Props = Props[Coach];
}

class Coach() extends Actor with ActorLogging {

  val runner = context.actorOf(Runner.props(new Marathon), "runner")

  override def supervisorStrategy: SupervisorStrategy = OneForOneStrategy(maxNrOfRetries = 2, withinTimeRange = 5 seconds) {
    case _: RuntimeException => Restart
  }

  override def receive = LoggingReceive {
    case GetSetGo => runner ! GoForIt
  }
}

package com.learner.ahka.runforever

import akka.actor.Status.Failure
import akka.actor.{Actor, ActorLogging, Props}
import akka.event.LoggingReceive
import akka.pattern.pipe

object Runner {
  def props(race: Race) = Props(classOf[Runner], race)
}

class Runner(race: Race) extends Actor with ActorLogging {

  import context.dispatcher

  override def receive: Receive = LoggingReceive {
    case GoForIt => race.start pipeTo self
    case Failure(throwable) => throw throwable
  }
}

package com.learner.ahka.runforever

import scala.concurrent.Future

case object GoForIt

trait Race {
  def start: Future[Any]
}

class Marathon extends Race {

  import scala.concurrent.ExecutionContext.Implicits.global

  override def start: Future[Any] = future

  val future = Future {
    for (i <- 1 to 3) {
      println("I am a Marathon Runner!")
      Thread.sleep(1000)
    }
    throw new RuntimeException("MarathonRunner is tired")
  }
}

主类

package com.learner.ahka.runforever

import akka.actor.ActorSystem
import com.typesafe.config.ConfigFactory

object RaceEvent extends App {
  val config = ConfigFactory.parseString( """
    akka.loglevel = "DEBUG"
    akka.actor.debug {
      receive = on
      lifecycle = on
    }
                                          """)
  val system = ActorSystem.create("race", config)
  val coach = system.actorOf(Coach.props(), "coach")
  coach ! GetSetGo
}

package com.learner.ahka.runforever

import akka.actor.SupervisorStrategy.{Escalate, Restart}
import akka.actor._
import akka.event.LoggingReceive

import scala.concurrent.duration._

case object GetSetGo

object Coach {
  def props(): Props = Props[Coach];
}

class Coach() extends Actor with ActorLogging {

  val runner = context.actorOf(Runner.props(new Marathon), "runner")

  override def supervisorStrategy: SupervisorStrategy = OneForOneStrategy(maxNrOfRetries = 2, withinTimeRange = 5 seconds) {
    case _: RuntimeException => Restart
  }

  override def receive = LoggingReceive {
    case GetSetGo => runner ! GoForIt
  }
}

package com.learner.ahka.runforever

import akka.actor.Status.Failure
import akka.actor.{Actor, ActorLogging, Props}
import akka.event.LoggingReceive
import akka.pattern.pipe

object Runner {
  def props(race: Race) = Props(classOf[Runner], race)
}

class Runner(race: Race) extends Actor with ActorLogging {

  import context.dispatcher

  override def receive: Receive = LoggingReceive {
    case GoForIt => race.start pipeTo self
    case Failure(throwable) => throw throwable
  }
}

package com.learner.ahka.runforever

import scala.concurrent.Future

case object GoForIt

trait Race {
  def start: Future[Any]
}

class Marathon extends Race {

  import scala.concurrent.ExecutionContext.Implicits.global

  override def start: Future[Any] = future

  val future = Future {
    for (i <- 1 to 3) {
      println("I am a Marathon Runner!")
      Thread.sleep(1000)
    }
    throw new RuntimeException("MarathonRunner is tired")
  }
}

主管

package com.learner.ahka.runforever

import akka.actor.ActorSystem
import com.typesafe.config.ConfigFactory

object RaceEvent extends App {
  val config = ConfigFactory.parseString( """
    akka.loglevel = "DEBUG"
    akka.actor.debug {
      receive = on
      lifecycle = on
    }
                                          """)
  val system = ActorSystem.create("race", config)
  val coach = system.actorOf(Coach.props(), "coach")
  coach ! GetSetGo
}

package com.learner.ahka.runforever

import akka.actor.SupervisorStrategy.{Escalate, Restart}
import akka.actor._
import akka.event.LoggingReceive

import scala.concurrent.duration._

case object GetSetGo

object Coach {
  def props(): Props = Props[Coach];
}

class Coach() extends Actor with ActorLogging {

  val runner = context.actorOf(Runner.props(new Marathon), "runner")

  override def supervisorStrategy: SupervisorStrategy = OneForOneStrategy(maxNrOfRetries = 2, withinTimeRange = 5 seconds) {
    case _: RuntimeException => Restart
  }

  override def receive = LoggingReceive {
    case GetSetGo => runner ! GoForIt
  }
}

package com.learner.ahka.runforever

import akka.actor.Status.Failure
import akka.actor.{Actor, ActorLogging, Props}
import akka.event.LoggingReceive
import akka.pattern.pipe

object Runner {
  def props(race: Race) = Props(classOf[Runner], race)
}

class Runner(race: Race) extends Actor with ActorLogging {

  import context.dispatcher

  override def receive: Receive = LoggingReceive {
    case GoForIt => race.start pipeTo self
    case Failure(throwable) => throw throwable
  }
}

package com.learner.ahka.runforever

import scala.concurrent.Future

case object GoForIt

trait Race {
  def start: Future[Any]
}

class Marathon extends Race {

  import scala.concurrent.ExecutionContext.Implicits.global

  override def start: Future[Any] = future

  val future = Future {
    for (i <- 1 to 3) {
      println("I am a Marathon Runner!")
      Thread.sleep(1000)
    }
    throw new RuntimeException("MarathonRunner is tired")
  }
}

演员

package com.learner.ahka.runforever

import akka.actor.ActorSystem
import com.typesafe.config.ConfigFactory

object RaceEvent extends App {
  val config = ConfigFactory.parseString( """
    akka.loglevel = "DEBUG"
    akka.actor.debug {
      receive = on
      lifecycle = on
    }
                                          """)
  val system = ActorSystem.create("race", config)
  val coach = system.actorOf(Coach.props(), "coach")
  coach ! GetSetGo
}

package com.learner.ahka.runforever

import akka.actor.SupervisorStrategy.{Escalate, Restart}
import akka.actor._
import akka.event.LoggingReceive

import scala.concurrent.duration._

case object GetSetGo

object Coach {
  def props(): Props = Props[Coach];
}

class Coach() extends Actor with ActorLogging {

  val runner = context.actorOf(Runner.props(new Marathon), "runner")

  override def supervisorStrategy: SupervisorStrategy = OneForOneStrategy(maxNrOfRetries = 2, withinTimeRange = 5 seconds) {
    case _: RuntimeException => Restart
  }

  override def receive = LoggingReceive {
    case GetSetGo => runner ! GoForIt
  }
}

package com.learner.ahka.runforever

import akka.actor.Status.Failure
import akka.actor.{Actor, ActorLogging, Props}
import akka.event.LoggingReceive
import akka.pattern.pipe

object Runner {
  def props(race: Race) = Props(classOf[Runner], race)
}

class Runner(race: Race) extends Actor with ActorLogging {

  import context.dispatcher

  override def receive: Receive = LoggingReceive {
    case GoForIt => race.start pipeTo self
    case Failure(throwable) => throw throwable
  }
}

package com.learner.ahka.runforever

import scala.concurrent.Future

case object GoForIt

trait Race {
  def start: Future[Any]
}

class Marathon extends Race {

  import scala.concurrent.ExecutionContext.Implicits.global

  override def start: Future[Any] = future

  val future = Future {
    for (i <- 1 to 3) {
      println("I am a Marathon Runner!")
      Thread.sleep(1000)
    }
    throw new RuntimeException("MarathonRunner is tired")
  }
}

实际工作

package com.learner.ahka.runforever

import akka.actor.ActorSystem
import com.typesafe.config.ConfigFactory

object RaceEvent extends App {
  val config = ConfigFactory.parseString( """
    akka.loglevel = "DEBUG"
    akka.actor.debug {
      receive = on
      lifecycle = on
    }
                                          """)
  val system = ActorSystem.create("race", config)
  val coach = system.actorOf(Coach.props(), "coach")
  coach ! GetSetGo
}

package com.learner.ahka.runforever

import akka.actor.SupervisorStrategy.{Escalate, Restart}
import akka.actor._
import akka.event.LoggingReceive

import scala.concurrent.duration._

case object GetSetGo

object Coach {
  def props(): Props = Props[Coach];
}

class Coach() extends Actor with ActorLogging {

  val runner = context.actorOf(Runner.props(new Marathon), "runner")

  override def supervisorStrategy: SupervisorStrategy = OneForOneStrategy(maxNrOfRetries = 2, withinTimeRange = 5 seconds) {
    case _: RuntimeException => Restart
  }

  override def receive = LoggingReceive {
    case GetSetGo => runner ! GoForIt
  }
}

package com.learner.ahka.runforever

import akka.actor.Status.Failure
import akka.actor.{Actor, ActorLogging, Props}
import akka.event.LoggingReceive
import akka.pattern.pipe

object Runner {
  def props(race: Race) = Props(classOf[Runner], race)
}

class Runner(race: Race) extends Actor with ActorLogging {

  import context.dispatcher

  override def receive: Receive = LoggingReceive {
    case GoForIt => race.start pipeTo self
    case Failure(throwable) => throw throwable
  }
}

package com.learner.ahka.runforever

import scala.concurrent.Future

case object GoForIt

trait Race {
  def start: Future[Any]
}

class Marathon extends Race {

  import scala.concurrent.ExecutionContext.Implicits.global

  override def start: Future[Any] = future

  val future = Future {
    for (i <- 1 to 3) {
      println("I am a Marathon Runner!")
      Thread.sleep(1000)
    }
    throw new RuntimeException("MarathonRunner is tired")
  }
}

更新

---

如果我没有委托给

Future

，即使在重新启动的情况下，一切都会按预期工作，但是当委托给

Future

时，在actor

重新启动的情况下，
Future
不会执行。请参见
您可以覆盖postRestart方法，将消息发送回父级以通知其重新启动，然后在父级中观察新的消息类型并做出相应的响应。如果
context.parent
无法满足此目的（我倾向于不依赖它），那么让Coach actor在实例化
Runner
时将它的
self
actor引用作为一个新的构造函数参数传递给它，因为它并不为人所知，但您可以从supervisorStrategy访问sender（）。这意味着您可以轻松识别要重新启动的参与者（sender（）将指向当前正在决定的ActorRef）。这是完全安全的
 我试过了，
SupervisorStrategy
运行良好，但消息不会再次执行。这是我的更改链接，我觉得你的代码看起来不错，所以我想我们忽略了其他一些东西（例如，可能需要在重新启动时刷新消息队列）。你的意思是清除邮箱？这在
重新启动时似乎是不可能的，我刚刚意识到监管工作正常，打印语句也能根据需要正确进行，但future没有执行。看见顺便说一句，非常感谢您的帮助，非常感谢。如果我不委托
Future
，而是在
Actor
本身中进行，事情似乎会成功。关于未来的事我不明白