scala actor

!	发送异步消息，没有返回值。
!?	发送同步消息，等待返回值。
!!	发送异步消息，返回值是 Future[Any]。

actor  例子        Scala在2.11.x版本中将Akka加入其中，作为其默认的Actor，老版本的Actor已经废弃

package cn.itcast.actor
//注意导包是scala.actors.Actor
import scala.actors.Actor

object MyActor1 extends Actor{
  //重新act方法
  def act(){
    for(i <- 1 to 10){
      println("actor-1 " + i)
    }
  }
}

object MyActor2 extends Actor{
  //重新act方法
  def act(){
    for(i <- 1 to 10){
      println("actor-2 " + i)
    }
  }
}

object ActorTest extends App{
  //启动Actor
  MyActor1.start()
  MyActor2.start()
}

一直接收信息

package cn.itcast.actor

import scala.actors.Actor

class MyActor extends Actor {

  override def act(): Unit = {
    while (true) {
      receive {
        case "start" => {
          println("starting ...")
        }
        case "stop" => {
          println("stopping ...")
        }
      }
    }
  }
}

object MyActor {
  def main(args: Array[String]) {
    val actor = new MyActor
    actor.start()
    actor ! "start"
    actor ! "stop"
    println("消息发送完成！")
  }
}

react方式会复用线程，比receive更高效，react 如果要反复执行消息处理，react外层要用loop，不能用while

package cn.itcast.actor

import scala.actors.Actor


class YourActor extends Actor {

  override def act(): Unit = {
    loop {
      react {
        case "start" => {
          println("starting ...")
        }
        case "stop" => {
          println("stopping ...")
        }
      }
    }
  }
}


object YourActor {
  def main(args: Array[String]) {
    val actor = new YourActor
    actor.start()
    actor ! "start"
    actor ! "stop"
    println("消息发送完成！")
  }
}

使用case class发送消息

package cn.itcast.actor
package cn.itcast.actor
import scala.actors.Actor

class AppleActor extends Actor {

  def act(): Unit = {
    while (true) {
      receive {
        case "start" => println("starting ...")
        case SyncMsg(id, msg) => {
          println(id + ",sync " + msg)
          sender ! ReplyMsg(3,"finished")
        }
        case AsyncMsg(id, msg) => {
          println(id + ",async " + msg)
        }
      }
    }
  }
}

object AppleActor {
  def main(args: Array[String]) {
    val a = new AppleActor
    a.start()
    //异步消息
    a ! AsyncMsg(1, "hello actor")
    println("异步消息发送完成")
    //同步消息
    //val content = a.!?(1000, SyncMsg(2, "hello actor"))
    //println(content)
    val reply = a !! SyncMsg(2, "hello actor")
    println(reply.isSet)
    //println("123")
    val c = reply.apply()
    println(reply.isSet)
    println(c)
  }
}
case class SyncMsg(id : Int, msg: String)
case class AsyncMsg(id : Int, msg: String)
case class ReplyMsg(id : Int, msg: String)