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[英]Akka Actor can't connect to remote server where Scala Actor could
[英]Where is wrong in my remote actor demo?
我正在尝试向远程参与者发送消息,但是失败了。
我的主要代码是:
RemoteActorDemo.scala
import akka.actor.{Actor, ActorSystem, Props}
object RemoteActorDemo extends App {
val system = ActorSystem("RemoteActorSystem")
val actor = system.actorOf(Props[RemoteActor], name = "RemoteActor")
actor ! "Remote Actor is alive"
}
class RemoteActor extends Actor {
override def receive: Receive = {
case msg =>
println("### RemoteActor received message: " + msg)
sender ! "Hello from RemoteActor"
}
}
使用application.conf
:
akka {
actor {
provider = "akka.remote.RemoteActorRefProvider"
}
remote {
enabled-transports = ["akka.remote.netty.tcp"]
netty.tcp {
hostname = "127.0.0.1"
port = 5150
}
}
}
和LocalActorDemo.scala :
import akka.actor.{Actor, ActorSystem, Props}
object LocalActorDemo extends App {
val system = ActorSystem("ActorDemo")
val localActor = system.actorOf(Props[LocalActor])
localActor ! "Start"
}
class LocalActor extends Actor {
val remote = context.actorSelection("akka.tcp://RemoteActorSystem@127.0.0.1:5150/user/RemoteActor")
override def receive: Receive = {
case "Start" =>
println("### LocalActor started")
remote ! "Hello from LocalActor"
case msg => println("*** LocalActor receives msg: " + msg)
}
}
问题是本地角色无法连接远程角色。 它在控制台中打印:
### LocalActor started
[INFO] [10/05/2015 20:57:57.334] [ActorDemo-akka.actor.default-dispatcher-4] [akka://ActorDemo/deadLetters]
Message [java.lang.String] from Actor[akka://ActorDemo/user/$a#-11944341] to Actor[akka://ActorDemo/deadLetters]
was not delivered. [1] dead letters encountered. This logging can be turned off or adjusted with configuration
settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.
我是akka的新手,不确定哪里出问题了。
您可以在此处查看演示项目: https : //github.com/freewind/remote-actors-demo ,您可以按照“自述文件”中的描述进行克隆和运行。
在local
子项目中添加一个application.conf
,其内容如下:
akka {
actor {
provider = "akka.remote.RemoteActorRefProvider"
}
remote {
enabled-transports = ["akka.remote.netty.tcp"]
netty.tcp {
hostname = "127.0.0.1"
port = 0
}
}
}
如官方文件所述 :
要在Akka项目中启用远程功能,您至少应将以下更改添加到application.conf文件中
这也适用于远程系统的客户端 。
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