Packages

  • package root
    Definition Classes
    root
  • package akka
    Definition Classes
    root
  • package stream
    Definition Classes
    akka
  • package scaladsl

    Scala API: The flow DSL allows the formulation of stream transformations based on some input.

    Scala API: The flow DSL allows the formulation of stream transformations based on some input. The starting point is called Source and can be a collection, an iterator, a block of code which is evaluated repeatedly or a org.reactivestreams.Publisher. A flow with an attached input and open output is also a Source.

    A flow may also be defined without an attached input or output and that is then a Flow. The Flow can be connected to the Source later by using Source#via with the flow as argument, and it remains a Source.

    Transformations can be appended to Source and Flow with the operations defined in FlowOps. Each DSL element produces a new flow that can be further transformed, building up a description of the complete transformation pipeline.

    The termination point of a flow is called Sink and can for example be a Future or org.reactivestreams.Subscriber. A flow with an attached output and open input is also a Sink.

    If a flow has both an attached input and an attached output it becomes a RunnableGraph. In order to execute this pipeline the flow must be materialized by calling RunnableGraph#run on it.

    You can create your Source, Flow and Sink in any order and then wire them together before they are materialized by connecting them using Flow#via and Flow#to, or connecting them into a GraphDSL with fan-in and fan-out elements.

    See Reactive Streams for details on org.reactivestreams.Publisher and org.reactivestreams.Subscriber.

    It should be noted that the streams modeled by this library are “hot”, meaning that they asynchronously flow through a series of processors without detailed control by the user. In particular it is not predictable how many elements a given transformation step might buffer before handing elements downstream, which means that transformation functions may be invoked more often than for corresponding transformations on strict collections like List. *An important consequence* is that elements that were produced into a stream may be discarded by later processors, e.g. when using the #take operator.

    By default every operation is executed within its own akka.actor.Actor to enable full pipelining of the chained set of computations. This behavior is determined by the akka.stream.Materializer which is required by those methods that materialize the Flow into a series of org.reactivestreams.Processor instances. The returned reactive stream is fully started and active.

    Definition Classes
    stream
  • object GraphDSL extends GraphApply
    Definition Classes
    scaladsl
  • object Implicits
    Definition Classes
    GraphDSL
  • BidiFlowShapeArrow
  • CombinerBase
  • DisabledReversePortOps
  • FanInOps
  • FanOutOps
  • FlowArrow
  • FlowShapeArrow
  • PortOps
  • ReverseCombinerBase
  • ReversePortOps
  • SinkArrow
  • SinkShapeArrow
  • SourceArrow
  • SourceShapeArrow

implicit final class FlowArrow[I, O, M] extends AnyVal

Source
Graph.scala
Linear Supertypes
AnyVal, Any
Type Hierarchy
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. FlowArrow
  2. AnyVal
  3. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new FlowArrow(f: Graph[FlowShape[I, O], M])

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    Any
  2. final def ##: Int
    Definition Classes
    Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from FlowArrow[I, O, M] toany2stringadd[FlowArrow[I, O, M]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (FlowArrow[I, O, M], B)
    Implicit
    This member is added by an implicit conversion from FlowArrow[I, O, M] toArrowAssoc[FlowArrow[I, O, M]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. def <~>[M2](flow: Graph[FlowShape[O, I], M2])(implicit b: Builder[_]): Unit
  6. def <~>[I2, O2](bidi: BidiShape[O, O2, I2, I])(implicit b: Builder[_]): BidiShape[O, O2, I2, I]
  7. def <~>[I2, O2, Mat](bidi: Graph[BidiShape[O, O2, I2, I], Mat])(implicit b: Builder[_]): BidiShape[O, O2, I2, I]
  8. final def ==(arg0: Any): Boolean
    Definition Classes
    Any
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. def ensuring(cond: (FlowArrow[I, O, M]) => Boolean, msg: => Any): FlowArrow[I, O, M]
    Implicit
    This member is added by an implicit conversion from FlowArrow[I, O, M] toEnsuring[FlowArrow[I, O, M]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: (FlowArrow[I, O, M]) => Boolean): FlowArrow[I, O, M]
    Implicit
    This member is added by an implicit conversion from FlowArrow[I, O, M] toEnsuring[FlowArrow[I, O, M]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. def ensuring(cond: Boolean, msg: => Any): FlowArrow[I, O, M]
    Implicit
    This member is added by an implicit conversion from FlowArrow[I, O, M] toEnsuring[FlowArrow[I, O, M]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: Boolean): FlowArrow[I, O, M]
    Implicit
    This member is added by an implicit conversion from FlowArrow[I, O, M] toEnsuring[FlowArrow[I, O, M]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. val f: Graph[FlowShape[I, O], M]
  15. def getClass(): Class[_ <: AnyVal]
    Definition Classes
    AnyVal → Any
  16. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  17. def toString(): String
    Definition Classes
    Any

Deprecated Value Members

  1. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from FlowArrow[I, O, M] toStringFormat[FlowArrow[I, O, M]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.12.16) Use formatString.format(value) instead of value.formatted(formatString), or use the f"" string interpolator. In Java 15 and later, formatted resolves to the new method in String which has reversed parameters.

  2. def →[B](y: B): (FlowArrow[I, O, M], B)
    Implicit
    This member is added by an implicit conversion from FlowArrow[I, O, M] toArrowAssoc[FlowArrow[I, O, M]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from AnyVal

Inherited from Any

Inherited by implicit conversion any2stringadd fromFlowArrow[I, O, M] to any2stringadd[FlowArrow[I, O, M]]

Inherited by implicit conversion StringFormat fromFlowArrow[I, O, M] to StringFormat[FlowArrow[I, O, M]]

Inherited by implicit conversion Ensuring fromFlowArrow[I, O, M] to Ensuring[FlowArrow[I, O, M]]

Inherited by implicit conversion ArrowAssoc fromFlowArrow[I, O, M] to ArrowAssoc[FlowArrow[I, O, M]]

Ungrouped