He-Pin opened a new issue, #1652: URL: https://github.com/apache/pekko/issues/1652
Motivation: The original issue is https://github.com/apache/pekko/pull/1623 and https://github.com/apache/pekko/discussions/1566 , which do help find some problems, but with how the current interpreter and `concatAllLazy` are implemented, we can not fix the problem. So a new operator is needed. Modification: I would like to add a new operator `concatAllDeferred` to support this usage. ```scala def concatAllDeferred[U >: Out](those: Graph[SourceShape[U], _]*): Repr[U] = concatLazy(Source.lazySource( () => Source(those).flatMapConcat(ConstantFun.scalaIdentityFunction))) ``` Result: ```scala package org.apache.pekko.stream.scaladsl import org.apache.pekko.actor.ActorSystem import org.apache.pekko.util.ByteString import scala.concurrent.Await object PekkoQuickstart extends App { private implicit val system: ActorSystem = ActorSystem() val s = Source .repeat(()) .map(_ => ByteString('a' * 400000)) .take(1000000) .prefixAndTail(50000) .flatMapConcat { case (prefix, tail) => Source(prefix).concatLazy(tail) } val r = Source.empty .concatAllDeferred(List.tabulate(30000)(_ => s): _*) .runWith(Sink.ignore) Await.result(r, scala.concurrent.duration.Duration.Inf) println(r.value) // Source // .repeat(s) // .take(30000) // .flatMapConcat(x => x) // .runWith(Sink.ignore) // .onComplete(println(_)) // Source.empty // .concatAllLazy(List.tabulate(30000)(_ => Source.lazySource(() => s)): _*) // .runWith(Sink.ignore).onComplete(println(_)) } ``` runs without problem <img width="1182" alt="image" src="https://github.com/user-attachments/assets/6df6eb94-750f-4fbe-bfa5-38ff916540f8"; /> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
