sealed trait Accumulator[-E, +A] extends AnyRef
An accumulator of elements into a future of a result.
This is essentially a lightweight wrapper around a Sink that gets materialised to a Future, but provides convenient methods for working directly with that future as well as transforming the input.
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- Accumulator.scala
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- abstract def asJava: libs.streams.Accumulator[E, A]
Convert this accumulator to a Java Accumulator.
Convert this accumulator to a Java Accumulator.
- returns
The Java accumulator.
- abstract def map[B](f: (A) => B)(implicit executor: ExecutionContext): Accumulator[E, B]
Map the result of this accumulator to something else.
- abstract def mapFuture[B](f: (A) => Future[B])(implicit executor: ExecutionContext): Accumulator[E, B]
Map the result of this accumulator to a future of something else.
- abstract def recover[B >: A](pf: PartialFunction[Throwable, B])(implicit executor: ExecutionContext): Accumulator[E, B]
Recover from errors encountered by this accumulator.
- abstract def recoverWith[B >: A](pf: PartialFunction[Throwable, Future[B]])(implicit executor: ExecutionContext): Accumulator[E, B]
Recover from errors encountered by this accumulator.
- abstract def run(elem: E)(implicit materializer: Materializer): Future[A]
Run this accumulator by feeding a single element into it.
- abstract def run()(implicit materializer: Materializer): Future[A]
Run this accumulator by feeding nothing into it.
- abstract def run(source: Source[E, _])(implicit materializer: Materializer): Future[A]
Run this accumulator by feeding in the given source.
- abstract def through[F](flow: Flow[F, E, _]): Accumulator[F, A]
Return a new accumulator that first feeds the input through the given flow before it goes through this accumulator.
- abstract def toSink: Sink[E, Future[A]]
Convert this accumulator to a Sink that gets materialised to a Future.
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- def ~>:(source: Source[E, _])(implicit materializer: Materializer): Future[A]
Right associative operator alias for run.
Right associative operator alias for run.
This can be used for a more fluent DSL that matches the flow of the data, for example:
val intAccumulator: Accumulator[Int, Int] = ... val source = Source(1 to 3) val intFuture = source ~>: intAccumulator
- def ~>:[F](flow: Flow[F, E, _]): Accumulator[F, A]
Right associative operator alias for through.
Right associative operator alias for through.
This can be used for a more fluent DSL that matches the flow of the data, for example:
val intAccumulator: Accumulator[Int, Unit] = ... val toInt = Flow[String].map(_.toInt) val stringAccumulator = toInt ~>: intAccumulator