问如何在scala中并发执行此操作

EN

dbs.foreach({
  var map = scala.collection.mutable.Map[String, mutable.MutableList[String]]()
  db =>
    val resultList = getTables(hive, db)
    map+=(db -> resultList)
})

def getAllTablesConcurrent(hive: JdbcHive, dbs: mutable.MutableList[String]): Map[String, mutable.MutableList[String]] = {
  implicit val context:ExecutionContext = ExecutionContext.fromExecutor(Executors.newFixedThreadPool(10))
  val futures = dbs.map {
    db =>
        Future(db, getTables(hive, db))
    }
  val map = Await.result( Future.sequence(futures), Duration(10, TimeUnit.SECONDS) ).toMap
  map
}