gistfile1.scala

 def increment(key: String):Int = {
    var rv:Int = -1
    if (client.applyUpdate(new UpdateAction[String,String] {
      def update(storeClient: StoreClient[String,String]) {
    val value:Versioned[String] = storeClient.get(key)
    if (value == null) {
          storeClient.put(key, new Versioned[String]("1"))
    }
    else {
          value.setObject((value.getValue.toInt + 1).toString)
          storeClient.put(key, value)
          rv = value.getValue.toInt
    }
      }
    }, 100))
    rv
      else
    throw new RuntimeException("Unable to update the counter, too many conflicts.")
  }