asynchronous - Accessing spray request from spray response -

i'm calling function every 50 ms :

def send() = {     val mydata = generaterandomdata()     val response = pipeline(post("http://slow-website.com/send", mydata))     response oncomplete {       case success(r) => ? how access mydata  ?        case failure(error) => print(error.getmessage)     } } 

i know data sent in successfull request.
how can achieve this?

just refer mydata.

what happens behind scenes scala compiler creates closure oncomplete handler argument captures reference mydata can use it.