redis使用事务获取和设置密钥到期

我正在使用etaty rediscala( https://github.com/etaty/rediscala )客户。这是我的功能

private def getVersionTime(db: RedisClient, interval: Long)(implicit ec: ExecutionContext): Future[Long] = {

import akka.util.ByteString
import redis.ByteStringFormatter

implicit val byteStringLongFormatter = new ByteStringFormatter[Long] {
  def serialize(data: Long): ByteString = ByteString(data.toString.getBytes)
  def deserialize(bs: ByteString): Long = bs.utf8String.toLong
}

db.get[Long]("versionTime").map {
  case Some(v) => loggerF.info(s"Retrieved version time ${v}")
    v
  case None => val current = System.currentTimeMillis()
    db.setex[Long]("versionTime", (current / 1000) + interval, current)
    loggerF.info(s"set version time ${current}")
    current
}

}

这是我的测验。此测试调用上述方法

it("check with multiple tasks"){
  val target = 10
  val latch = new java.util.concurrent.CountDownLatch(target)
  (1 to target).map{t =>
    getVersionTime(prodDb, 10).map{r => print("\n" + r); latch.countDown()}
  }
  assert(latch.await(10, TimeUnit.SECONDS))
}

试验输出

14:52:46.692[池-1-线程-12]信息结束指示-设置版本时间1548062566687 14:52:46.693[池-1-线程-6]信息结束指示-设置版本时间1548062566687 14:52:46.693[池-1-线程-20]信息结束指示-设置版本时间1548062566687 14:52:46.692[池-1-线程-2]信息结束指示-设置版本时间1548062566668 14:52:46.692[池-1-线程-10]信息结束指示-设置版本时间1548062566687 14:52:46.693[池-1-线程-8]信息结束指示-设置版本时间1548062566687 14:52:46.692[池-1-线程-4]信息结束指示-设置版本时间1548062566668 14:52:46.692[池-1-线程-11]信息结束指示-设置版本时间1548062566687 14:52:46.692[池-1-线程-9]信息结束指示-设置版本时间1548062566687 14:52:46.692[池-1-线程-7]信息结束指示-设置版本时间1548062566687

预期的行为是-设置版本时间应该出现一次,对于其余线程,应该打印检索到的版本时间。我想我需要在这里使用事务,以便get和setex包装在watch和exec中

  private def getVersionTimeTrans(db: RedisClient, interval: Long): Long = {
    import akka.util.ByteString
    import redis.ByteStringFormatter

    implicit val byteStringLongFormatter = new ByteStringFormatter[Long] {
      def serialize(data: Long): ByteString = ByteString(data.toString.getBytes)
      def deserialize(bs: ByteString): Long = bs.utf8String.toLong
    }

    val redisTransaction = db.transaction()
    redisTransaction.watch("versionTime")
    val result: Future[Long] = redisTransaction.get[Long]("versionTime").map {
      case Some(v) => loggerF.info(s"Retrieved version time ${v}")
        v
      case None => val current = System.currentTimeMillis()
        redisTransaction.setex[Long]("versionTime", (current / 1000) + interval, current)
        loggerF.info(s"set version time ${current}")
        current
    }
    redisTransaction.exec()
    val r = for {
      i <- result
    } yield {
      i
    }
    Await.result(r, 10 seconds)
  }

测试

it("check with multiple threads "){
  val target = 10
  val latch = new java.util.concurrent.CountDownLatch(target)
  (1 to target).map{t =>
    Future(getVersionTimeTrans(prodDb, 10)).map{r => latch.countDown()}
  }
  assert(latch.await(10, TimeUnit.SECONDS))
}

对于这个测试,输出也是一样的。我想不出如何在事务中正确地包装它。请帮忙。