mdedetrich commented on code in PR #1831:
URL: https://github.com/apache/pekko/pull/1831#discussion_r2248291044
##########
stream/src/main/scala/org/apache/pekko/stream/scaladsl/Source.scala:
##########
@@ -108,6 +108,21 @@ final class Source[+Out, +Mat](
(mat, Source.fromPublisher(pub))
}
+ /**
+ * Materializes this [[Source]] using the [[Sink]], immediately returning
the values via the
+ * provided [[Sink]] as a new [[Source]].
+ *
+ * @param sink A sink which needs to materialize into a [[Future]],
typically one
+ * that collects values such as [[Sink.head]] or [[Sink.seq]]
+ * @return A new [[Source]] that contains the results of the provided
[[Source]]'s
+ * elements run with the [[Sink]]
+ * @since 1.2.0
+ */
+ def preMaterializeIntoSource[Mat2](sink: Graph[SinkShape[Out],
Future[Mat2]]): Source[Mat2, Future[NotUsed]] =
+ Source.fromMaterializer { (mat, attr) =>
+
Source.future(this.withAttributes(attr).toMat(sink)(Keep.right).run()(mat))
Review Comment:
Ill look into this on the weekend
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