小编Roh*_*hit的帖子

我想用FSM Akka Acctor进行存储/取消存储.我不知道放在哪里stash()和unstashAll().

我有一个简化的例子如下:

import akka.actor.{ActorSystem, FSM, Props, Stash}

trait TestState
case object StateA extends TestState
case object StateB extends TestState

case class TestData()

case class MessageA(msg: String)
case class MessageB(msg: String)
case object ChangeState

class TestFSM extends FSM[TestState, TestData] with Stash {

  startWith(StateA, TestData())

  when(StateA) {
    case Event(MessageA(msgA), _) =>
      println(s"In StateA: $msgA")
      stay()
    case Event(ChangeState, _) =>
      println("Changing state from A to B")
      goto(StateB)
  }

  when(StateB) {
    case Event(MessageB(msgB), _) =>
      println(s"In StateB: $msgB") …

我想使用组合或一些更高阶的魔法来简化以下lambda,

(\a b -> if (b) then (not a) else a)

但我想不出一个聪明的方法.你能帮帮我吗？

谢谢.