Im using https://github.com/AsyncHttpClient/async-http-client this library in my scala project, and im performing some http calls with it, but now on some http calls I need to retry a call if I dont get my expected result for 3 times.
How should I implement something like this?
thaknks
答案 0 :(得分:0)
This is an example of retry function based on Future.recoverWith If you run it you can see that it prints "run process" until the Future is successful but not more than 'times' times
object X extends App{
type Request = String
type Response = String
import scala.concurrent.ExecutionContext.Implicits.global
def retry(request: Request, process: Request => Future[Response], times: Int): Future[Response] ={
val responseF = process(request)
if(times > 0)
responseF.recoverWith{
case ex => println("fail")
retry(request, process, times - 1)
}
else
responseF
}
def process(s: Request): Future[Response] = {
println("run process")
if(Random.nextBoolean()) Future.successful("good") else Future.failed(new Exception)
}
val result = retry("", process, 3)
import scala.concurrent.duration._
println(Await.result(result, 1.second))
}