UnifiedJedisScala3 - testing scala to remove massive code duplication of previous versions

UnifiedJedisScala3.scala

package test

import redis.clients.util.Pool
import redis.clients.jedis._

class UnifiedJedisScala3 {
  val readPool: Pool[Jedis]
  val masterPool: Pool[Jedis]
  val currentDB: Int = 0;
  val redundancySwitch: Int = 3;
  val writing: Int = 0;

  def get(key: Array[Byte]): Array[Byte] = {
    val f: (Transaction) => Response[Array[Byte]] = _.get(key)
    wrap[Array[Byte]](f, redundancySwitch, currentDB, key).get()
  }

  def set(key: Array[Byte], value: Array[Byte]): Array[Byte] = {
    val f: (Transaction) => Response[Array[Byte]] = _.set(key, value)
    wrap[Array[Byte]](f, writing, currentDB, key).get()
  }

  def wrap[Array[Byte]](x: (Transaction) => Response[Array[Byte]], switcher: Int, db: Int, key: Array[Byte]*): Response[Array[Byte]] = {
    var result: Response[Array[Byte]] = null
    val jedis: Jedis = if (switcher > 0) readPool.getResource else masterPool.getResource

    try {
      key.foreach(jedis.watch(_))
      val transa = jedis.multi()
      transa.select(db)
      result = x(transa)
      transa.exec
    }
    catch {
      case _: Exception => result = wrap[Array[Byte]](x, switcher - 1, db, key)
    }
    finally {
      if (switcher > 0) readPool.returnResource(jedis) else masterPool.returnResource(jedis)
    }
    result
  }

}