Get 200 random keys from a redis cluster

MGet.scala

import io.lettuce.core.RedisURI
import io.lettuce.core.cluster.{ ClusterClientOptions, ClusterTopologyRefreshOptions, RedisClusterClient }

import scala.util.Random

object MGet {
  def main(args: Array[String]): Unit = {
    val host = args(0)
    val port = args(1).toInt
    val password = args(2)
    val uri = RedisURI.Builder
      .redis(host)
      .withPassword(password)
      .withPort(port).build()

    val topology = ClusterTopologyRefreshOptions.builder().enableAllAdaptiveRefreshTriggers().build()
    val client = RedisClusterClient.create(uri)
    client.setOptions(ClusterClientOptions.builder().topologyRefreshOptions(topology).build())

    val connection = client.connect()
    val api = connection.async()

    val randomKeys = Range(1,200).map(_ => Random.alphanumeric.take(20).toList.mkString).toList
    println("Asking for :" + randomKeys.mkString(", "))
    println(api.mget(randomKeys: _*).get())
  }
}