scala - PersistentFSM がジャーナルに保持されない

Question

以下の簡単な例を使用して、 Akka 2.4 の新機能PersistentFSM( http://doc.akka.io/docs/akka/2.4.0/scala/persistence.html#Persistent_FSM )をテストしようとしています。

この例では、5 つのランダムな整数を生成し、シーケンスに追加します。私がやりたいことは、データを永続化し、アプリケーションの次の実行時に既存の一連の数字に追加し続けることです。現在のドキュメントPersistentFSMは少し不足しており、これを機能させる明確な方法はありません。何か案は？

TestFSM.scala:

import akka.actor.{Actor, ActorSystem, Props}
import akka.persistence.fsm.PersistentFSM
import akka.persistence.fsm.PersistentFSM.FSMState
import scala.reflect._
import scala.util.Random

final case class SetNumber(num: Integer)

sealed trait State extends FSMState
case object Idle extends State {
    override def identifier: String = "Idle"
}
case object Active extends State {
    override def identifier: String = "Active"
}

sealed trait Data {
    def add(number: Integer): Data
}
case object Empty extends Data {
    def add(number: Integer) = Numbers(Vector(number))
}
final case class Numbers(queue: Seq[Integer]) extends Data {
    def add(number: Integer) = Numbers(queue :+ number)
}

sealed trait DomainEvt
case class SetNumberEvt(num: Integer) extends DomainEvt

class Generator extends Actor with PersistentFSM[State, Data, DomainEvt] {

    override def applyEvent(domainEvent: DomainEvt, currentData: Data): Data = {
        domainEvent match {
            case SetNumberEvt(num) => currentData.add(num)
        }
    }

    override def persistenceId: String = "generator"

    override def domainEventClassTag: ClassTag[DomainEvt] = classTag[DomainEvt]

    startWith(Idle, Empty)

    when(Idle) {
        case Event(SetNumber(num), Empty) =>
            goto(Active) applying SetNumberEvt(num)
    }

    when(Active) {
        case Event(SetNumber(num), numbers: Data) =>
            println(numbers)
            stay applying SetNumberEvt(num)
    }

    initialize()

}

object TestFSM extends App {

    val system = ActorSystem()

    val actor = system.actorOf(Props[Generator])

    actor ! SetNumber(Random.nextInt())
    actor ! SetNumber(Random.nextInt())
    actor ! SetNumber(Random.nextInt())
    actor ! SetNumber(Random.nextInt())
    actor ! SetNumber(Random.nextInt())

    Thread.sleep(1000)
    system.terminate()

}

参照.conf:

akka.persistence.journal.plugin = "akka.persistence.journal.inmem"
akka.persistence.snapshot-store.plugin = "akka.persistence.snapshot-store.local"
akka.persistence.journal.leveldb.dir = "target/journal"
akka.persistence.snapshot-store.local.dir = "target/snapshots"