Packages

  • package root
    Definition Classes
    root
  • package fs2
    Definition Classes
    root
  • package interop
    Definition Classes
    fs2
  • package reactivestreams

    Implementation of the reactivestreams protocol for fs2

    Implementation of the reactivestreams protocol for fs2

    Definition Classes
    interop
    Example:

    1. scala> import fs2._
scala> import fs2.interop.reactivestreams._
scala> import cats.effect.{IO, Resource}, cats.effect.unsafe.implicits.global
scala>
scala> val upstream: Stream[IO, Int] = Stream(1, 2, 3).covary[IO]
scala> val publisher: Resource[IO, StreamUnicastPublisher[IO, Int]] = upstream.toUnicastPublisher
scala> val downstream: Stream[IO, Int] = Stream.resource(publisher).flatMap(_.toStreamBuffered[IO](bufferSize = 16))
scala>
scala> downstream.compile.toVector.unsafeRunSync()
res0: Vector[Int] = Vector(1, 2, 3)
    See also

    http://www.reactive-streams.org/

  • PublisherOps
  • StreamOps
  • StreamSubscriber
  • StreamUnicastPublisher
p

fs2.interop

reactivestreams

package reactivestreams

Implementation of the reactivestreams protocol for fs2

Source
package.scala
Example:

  1. scala> import fs2._
scala> import fs2.interop.reactivestreams._
scala> import cats.effect.{IO, Resource}, cats.effect.unsafe.implicits.global
scala>
scala> val upstream: Stream[IO, Int] = Stream(1, 2, 3).covary[IO]
scala> val publisher: Resource[IO, StreamUnicastPublisher[IO, Int]] = upstream.toUnicastPublisher
scala> val downstream: Stream[IO, Int] = Stream.resource(publisher).flatMap(_.toStreamBuffered[IO](bufferSize = 16))
scala>
scala> downstream.compile.toVector.unsafeRunSync()
res0: Vector[Int] = Vector(1, 2, 3)
See also

http://www.reactive-streams.org/

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Type Members

  1. implicit final class PublisherOps[A] extends AnyVal
  2. implicit final class StreamOps[F[_], A] extends AnyRef
  3. final class StreamSubscriber[F[_], A] extends Subscriber[A]

    Implementation of a org.reactivestreams.Subscriber.

    Implementation of a org.reactivestreams.Subscriber.

    This is used to obtain a fs2.Stream from an upstream reactivestreams system.

    See also

    https://github.com/reactive-streams/reactive-streams-jvm#2-subscriber-code

  4. final class StreamUnicastPublisher[F[_], A] extends Publisher[A]

    Implementation of a org.reactivestreams.Publisher

    Implementation of a org.reactivestreams.Publisher

    This is used to publish elements from a fs2.Stream to a downstream reactivestreams system.

    See also

    https://github.com/reactive-streams/reactive-streams-jvm#1-publisher-code

Value Members

  1. def fromPublisher[F[_], A](p: Publisher[A], bufferSize: Int)(implicit arg0: Async[F]): Stream[F, A]

    Creates a lazy stream from an org.reactivestreams.Publisher.

    Creates a lazy stream from an org.reactivestreams.Publisher.

    The publisher only receives a subscriber when the stream is run.

    bufferSize

    setup the number of elements asked each time from the org.reactivestreams.Publisher. A high number can be useful is the publisher is triggering from IO, like requesting elements from a database. The publisher can use this bufferSize to query elements in batch. A high number will also lead to more elements in memory.

  2. object StreamSubscriber
  3. object StreamUnicastPublisher

Deprecated Value Members

  1. def fromPublisher[F[_], A](p: Publisher[A])(implicit arg0: Async[F]): Stream[F, A]

    Creates a lazy stream from an org.reactivestreams.Publisher.

    Creates a lazy stream from an org.reactivestreams.Publisher.

    The publisher only receives a subscriber when the stream is run.

    Annotations
    @deprecated
    Deprecated

    (Since version 3.1.4) Use fromPublisher method with a buffer size. Use a buffer size of 1 to keep the same behavior.

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