java - 如何在scala akka中找到父 Actor

Question

我正在使用 scala akka actor 模型。我有一个父 Actor 创建了 n 个子 Actor 。小 Actor 先互相交谈，然后将答案报告给大 Actor 。但我无法让它适用于报告部分。代码结构如下:

class Master(n:Int) extends Actor{
    val system =ActorSystem("mysystem")
    for(i <- 1 to n){
        val child=system.actorOf(Props(new Node),name=i.toString) 
    }
    ... code let child actor talk with each other ...
    def receive={
        case _=>"received"
    }
}
class Node extends Actor{
    def receive={
        case => ... some code talking with each other...
                var master=context.actorSelection("../Master")
                master ! "talk back to master"
    } 
}
def main() {
    val Master=system.actorOf(Props(new Master(10)),name="Master")
}

Answer 1

让主节点将其自引用传递给节点。相关更改的行是:

... // In Master:
val child=context.actorOf(Props(new Node(self)),name=i.toString)
...
... // Definition of Node:
class Node(master: ActorRef) extends Actor{
...
//var master=context.actorSelection("../Master") - this line no longer required.
... //etc.