我将Finagle用作Web服务器,我想从我的应用程序逻辑中返回Scala-Futures。当然,如何以非阻塞方式将scala.concurrent.Future转换为com.twitter.util.Future?
没有足够的环境对此进行测试,但这是我为之撰写的内容"com.twitter" %% "finagle-http" % "6.25.0"
:
import com.twitter.{util => twitter}
import scala.concurrent.{ExecutionContext, Promise, Future}
import scala.util.{Failure, Success, Try}
import language.implicitConversions
object TwitterConverters {
implicit def scalaToTwitterTry[T](t: Try[T]): twitter.Try[T] = t match {
case Success(r) => twitter.Return(r)
case Failure(ex) => twitter.Throw(ex)
}
implicit def twitterToScalaTry[T](t: twitter.Try[T]): Try[T] = t match {
case twitter.Return(r) => Success(r)
case twitter.Throw(ex) => Failure(ex)
}
implicit def scalaToTwitterFuture[T](f: Future[T])(implicit ec: ExecutionContext): twitter.Future[T] = {
val promise = twitter.Promise[T]()
f.onComplete(promise update _)
promise
}
implicit def twitterToScalaFuture[T](f: twitter.Future[T]): Future[T] = {
val promise = Promise[T]()
f.respond(promise complete _)
promise.future
}
}
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