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

Balance

BidiFlow

Broadcast

BroadcastHub

Compression

Concat

CoupledTerminationFlow

FileIO

Flow

FlowOps

FlowOpsMat

FlowWithContext

FlowWithContextOps

Framing

GraphApply

GraphDSL

Interleave

JsonFraming

Keep

Merge

MergeHub

MergeLatest

MergePreferred

MergePrioritized

MergeSorted

OrElse

Partition

PartitionHub

RestartFlow

RestartSink

RestartSource

RestartWithBackoffFlow

RunnableGraph

ScalaSessionAPI

Sink

SinkQueue

SinkQueueWithCancel

SinkToCompletionStage

Source

SourceQueue

SourceQueueWithComplete

SourceToCompletionStage

SourceWithContext

StreamConverters

StreamRefs

SubFlow

TLS

TLSPlacebo

Tcp

TcpIdleTimeoutException

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akka.stream.scaladsl

SinkToCompletionStage

implicit final class SinkToCompletionStage[In, T] extends AnyVal

Source: package.scala

Linear Supertypes

AnyVal, Any

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SinkToCompletionStage
AnyVal
Any

Implicitly

by any2stringadd
by StringFormat
by Ensuring
by ArrowAssoc

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Instance Constructors

new SinkToCompletionStage(sink: Sink[In, Future[T]])

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
Any
final def ##(): Int

Definition Classes
Any
def +(other: String): String

Implicit
This member is added by an implicit conversion from SinkToCompletionStage[In, T] to any2stringadd[SinkToCompletionStage[In, T]] performed by method any2stringadd in scala.Predef.
Definition Classes
any2stringadd
def ->[B](y: B): (SinkToCompletionStage[In, T], B)

Implicit
This member is added by an implicit conversion from SinkToCompletionStage[In, T] to ArrowAssoc[SinkToCompletionStage[In, T]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc
Annotations
@inline()
final def ==(arg0: Any): Boolean

Definition Classes
Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def ensuring(cond: (SinkToCompletionStage[In, T]) ⇒ Boolean, msg: ⇒ Any): SinkToCompletionStage[In, T]

Implicit
This member is added by an implicit conversion from SinkToCompletionStage[In, T] to Ensuring[SinkToCompletionStage[In, T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: (SinkToCompletionStage[In, T]) ⇒ Boolean): SinkToCompletionStage[In, T]

Implicit
This member is added by an implicit conversion from SinkToCompletionStage[In, T] to Ensuring[SinkToCompletionStage[In, T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean, msg: ⇒ Any): SinkToCompletionStage[In, T]

Implicit
This member is added by an implicit conversion from SinkToCompletionStage[In, T] to Ensuring[SinkToCompletionStage[In, T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean): SinkToCompletionStage[In, T]

Implicit
This member is added by an implicit conversion from SinkToCompletionStage[In, T] to Ensuring[SinkToCompletionStage[In, T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def formatted(fmtstr: String): String

Implicit
This member is added by an implicit conversion from SinkToCompletionStage[In, T] to StringFormat[SinkToCompletionStage[In, T]] performed by method StringFormat in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()
def getClass(): Class[_ <: AnyVal]

Definition Classes
AnyVal → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
val sink: Sink[In, Future[T]]
def toCompletionStage(): Sink[In, CompletionStage[T]]
def toString(): String

Definition Classes
Any
def →[B](y: B): (SinkToCompletionStage[In, T], B)

Implicit
This member is added by an implicit conversion from SinkToCompletionStage[In, T] to ArrowAssoc[SinkToCompletionStage[In, T]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc

Packages

SinkToCompletionStage

implicit final class SinkToCompletionStage[In, T] extends AnyVal

Instance Constructors

Value Members

Inherited from AnyVal

Inherited from Any

Inherited by implicit conversion any2stringadd from SinkToCompletionStage[In, T] to any2stringadd[SinkToCompletionStage[In, T]]

Inherited by implicit conversion StringFormat from SinkToCompletionStage[In, T] to StringFormat[SinkToCompletionStage[In, T]]

Inherited by implicit conversion Ensuring from SinkToCompletionStage[In, T] to Ensuring[SinkToCompletionStage[In, T]]

Inherited by implicit conversion ArrowAssoc from SinkToCompletionStage[In, T] to ArrowAssoc[SinkToCompletionStage[In, T]]

Packages

SinkToCompletionStage 

implicit final class SinkToCompletionStage[In, T] extends AnyVal

Instance Constructors

Value Members

Inherited from AnyVal

Inherited from Any

Inherited by implicit conversion any2stringadd from SinkToCompletionStage[In, T] to any2stringadd[SinkToCompletionStage[In, T]]

Inherited by implicit conversion StringFormat from SinkToCompletionStage[In, T] to StringFormat[SinkToCompletionStage[In, T]]

Inherited by implicit conversion Ensuring from SinkToCompletionStage[In, T] to Ensuring[SinkToCompletionStage[In, T]]

Inherited by implicit conversion ArrowAssoc from SinkToCompletionStage[In, T] to ArrowAssoc[SinkToCompletionStage[In, T]]

SinkToCompletionStage