pekko/akka-docs/src/main/paradox/stream/operators/Sink/fromMaterializer.md

# Sink.fromMaterializer

Defer the creation of a `Sink` until materialization and access `Materializer` and `Attributes`

@ref[Sink operators](../index.md#sink-operators)

## Signature

@apidoc[Sink.fromMaterializer](Sink$) { scala="#fromMaterializer[T,M](factory:(akka.stream.Materializer,akka.stream.Attributes)=&gt;akka.stream.scaladsl.Sink[T,M]):akka.stream.scaladsl.Sink[T,scala.concurrent.Future[M]]" java="#fromMaterializer(java.util.function.BiFunction)" }

## Description

Typically used when access to materializer is needed to run a different stream during the construction of a sink.
Can also be used to access the underlying `ActorSystem` from `Materializer`.
Deprecate actor materializer (#27538) 2019-09-05 16:08:37 +02:00			`# Sink.fromMaterializer`

			Defer the creation of a `Sink` until materialization and access `Materializer` and `Attributes`

			`@ref[Sink operators](../index.md#sink-operators)`

			`## Signature`

Final signature to apidoc review (#29021) * Replace signature with apidoc in fromMaterializer operator docs * (untyped) actorRefWithBackpressure replace siugnature with apidoc * (typed) actorRefWithBackpressure replace siugnature with apidoc * signature to apidoc of map * (typed and untyped) actorRef signature to apidoc * Reviews ask (no replacement) * from/apply from signature to apidoc directive. 2020-05-06 11:17:53 +02:00			`@apidoc[Sink.fromMaterializer](Sink$) { scala="#fromMaterializer[T,M](factory:(akka.stream.Materializer,akka.stream.Attributes)=>akka.stream.scaladsl.Sink[T,M]):akka.stream.scaladsl.Sink[T,scala.concurrent.Future[M]]" java="#fromMaterializer(java.util.function.BiFunction)" }`
Deprecate actor materializer (#27538) 2019-09-05 16:08:37 +02:00
			`## Description`

			`Typically used when access to materializer is needed to run a different stream during the construction of a sink.`
Final signature to apidoc review (#29021) * Replace signature with apidoc in fromMaterializer operator docs * (untyped) actorRefWithBackpressure replace siugnature with apidoc * (typed) actorRefWithBackpressure replace siugnature with apidoc * signature to apidoc of map * (typed and untyped) actorRef signature to apidoc * Reviews ask (no replacement) * from/apply from signature to apidoc directive. 2020-05-06 11:17:53 +02:00			Can also be used to access the underlying `ActorSystem` from `Materializer`.