Packages

final class ZPipeline[-Env, +Err, -In, +Out] extends AnyRef

A ZPipeline[Env, Err, In, Out] is a polymorphic stream transformer. Pipelines accept a stream as input, and return the transformed stream as output.

Pipelines can be thought of as a recipe for calling a bunch of methods on a source stream, to yield a new (transformed) stream. A nice mental model is the following type alias:

type ZPipeline[Env, Err, In, Out] = ZStream[Env, Err, In] => ZStream[Env, Err, Out]

This encoding of a pipeline with a type alias is not used because it does not infer well. In its place, this trait captures the polymorphism inherent to many pipelines, which can therefore be more flexible about the environment and error types of the streams they transform.

There is no fundamental requirement for pipelines to exist, because everything pipelines do can be done directly on a stream. However, because pipelines separate the stream transformation from the source stream itself, it becomes possible to abstract over stream transformations at the level of values, creating, storing, and passing around reusable transformation pipelines that can be applied to many different streams.

The most common way to create a pipeline is to convert a sink into a pipeline (in general, transforming elements of a stream requires the power of a sink). However, the companion object has lots of other pipeline constructors based on the methods of stream.

Self Type
ZPipeline[Env, Err, In, Out]
Linear Supertypes
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Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. def <<<[Env1 <: Env, Err1 >: Err, In2](that: => ZPipeline[Env1, Err1, In2, In])(implicit trace: Trace): ZPipeline[Env1, Err1, In2, Out]

    Composes two pipelines into one pipeline, by first applying the transformation of the specified pipeline, and then applying the transformation of this pipeline.

  4. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  5. def >>>[Env1 <: Env, Err1 >: Err, Leftover, Out2](that: => ZSink[Env1, Err1, Out, Leftover, Out2])(implicit trace: Trace): ZSink[Env1, Err1, In, Leftover, Out2]

    Compose this transducer with a sink, resulting in a sink that processes elements by piping them through this transducer and piping the results into the sink.

  6. def >>>[Env1 <: Env, Err1 >: Err, Out2](that: => ZPipeline[Env1, Err1, Out, Out2])(implicit trace: Trace): ZPipeline[Env1, Err1, In, Out2]

    Composes two pipelines into one pipeline, by first applying the transformation of this pipeline, and then applying the transformation of the specified pipeline.

  7. def andThen[Env1 <: Env, Err1 >: Err, Out2](that: => ZPipeline[Env1, Err1, Out, Out2])(implicit trace: Trace): ZPipeline[Env1, Err1, In, Out2]

    A named version of the >>> operator.

  8. def apply[Env1 <: Env, Err1 >: Err](stream: => ZStream[Env1, Err1, In])(implicit trace: Trace): ZStream[Env1, Err1, Out]

    Attach this pipeline to the given stream

  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. val channel: ZChannel[Env, ZNothing, Chunk[In], Any, Err, Chunk[Out], Any]
  11. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  12. def compose[Env1 <: Env, Err1 >: Err, In2](that: => ZPipeline[Env1, Err1, In2, In])(implicit trace: Trace): ZPipeline[Env1, Err1, In2, Out]

    A named version of the <<< operator.

  13. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  14. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  15. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
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    @throws(classOf[java.lang.Throwable])
  16. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  17. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  18. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  19. def mapError[Err2](f: (Err) => Err2)(implicit trace: Trace): ZPipeline[Env, Err2, In, Out]

    Transforms the errors emitted by this pipeline using f.

  20. def mapErrorCause[Err2](f: (Cause[Err]) => Cause[Err2])(implicit trace: Trace): ZPipeline[Env, Err2, In, Out]

    A more powerful version of mapError which also surfaces the Cause of the channel failure

  21. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  22. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  23. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  24. def orDie(implicit ev: <:<[Err, Throwable], trace: Trace): ZPipeline[Env, Nothing, In, Out]

    Translates pipeline failure into death of the fiber, making all failures unchecked and not a part of the type of the effect.

  25. def orDieWith(f: (Err) => Throwable)(implicit trace: Trace): ZPipeline[Env, Nothing, In, Out]

    Keeps none of the errors, and terminates the fiber with them, using the specified function to convert the E into a Throwable.

  26. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  27. def toChannel: ZChannel[Env, ZNothing, Chunk[In], Any, Err, Chunk[Out], Any]

    Converts this pipeline to its underlying channel

  28. def toString(): String
    Definition Classes
    AnyRef → Any
  29. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  30. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
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    Annotations
    @throws(classOf[java.lang.InterruptedException])
  31. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

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