code challenge

package mix

/*
Scala 2.10.3
libraryDependencies ++= Seq(
    "com.netflix.rxjava" % "rxjava-scala" % "0.18.3",
    "com.h2database" % "h2" % "1.4.178",
)
*/

import java.sql.Connection
import java.sql.DriverManager

import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.Future
import scala.concurrent.duration.DurationInt

import rx.lang.scala.Observable
import rx.lang.scala.Subscription

object Partial {

  def main(args: Array[String]) {
    Class.forName("org.h2.Driver")
    val conn = DriverManager.getConnection("jdbc:h2:mem:")
    conn.prepareStatement("create table persons (name varchar(100))").execute()
    List("horia", "raluca", "lara", "albert").foreach { p =>
      conn.prepareStatement("insert into persons(name) values('" + p + "')").execute()
    }
    val found = searchPeople("select name from persons", conn)
    conn.close()
    println(found)
  }

  def searchPeople(query: String, conn: Connection): List[String] = {
    val five = Observable.interval(3000 millis).take(1)
    val jdbc = Observable[String](subscriber => {

      import scala.concurrent.ExecutionContext.Implicits.global

      subscriber.add(Subscription {
        Thread.currentThread().interrupt()
      })

      Future {
        val rs = conn.prepareStatement(query).executeQuery()
        while (rs.next() && !subscriber.isUnsubscribed) {
          Thread.sleep(1000L)
          subscriber.onNext(rs.getString("name"))
        }
        if (!subscriber.isUnsubscribed) {
          subscriber.onCompleted()
        }
      }
    })
    val max = jdbc.takeUntil(five)
    max.toBlockingObservable.toList

  }

}