Package org.apache.pekko.stream.javadsl

Class FlowWithContext$

java.lang.Object

org.apache.pekko.stream.javadsl.FlowWithContext$

public class FlowWithContext$
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final FlowWithContext$	MODULE$	Static reference to the singleton instance of this Scala object.

Constructor Summary

Constructors

Constructor	Description
FlowWithContext$()

Method Summary

Modifier and Type	Method	Description
<In, Ctx> FlowWithContext<In,Ctx,In,Ctx,NotUsed>	create()
<In, CtxIn, Out, CtxOut, Mat> FlowWithContext<In,CtxIn,Out,CtxOut,Mat>	fromPairs(Flow<Pair<In,CtxIn>,Pair<Out,CtxOut>,Mat> under)	Creates a FlowWithContext from a regular flow that operates on Pair<data, context> elements.
<FIn, FOut, FViaOut, Ctx, FMat, FViaMat, Mat> FlowWithContext<FIn,Ctx,Optional<FViaOut>,Ctx,Mat>	unsafeOptionalDataVia(FlowWithContext<FIn,Ctx,Optional<FOut>,Ctx,FMat> flow, Flow<FOut,FViaOut,FViaMat> viaFlow, Function2<FMat,FViaMat,Mat> combine)	Creates a FlowWithContext from an existing base FlowWithContext outputting an optional element and applying an additional viaFlow only if the element in the stream is defined.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MODULE$

public static final FlowWithContext$ MODULE$

Static reference to the singleton instance of this Scala object.

Constructor Details

FlowWithContext$

public FlowWithContext$()

Method Details

create

public <In,
Ctx>
FlowWithContext<In,Ctx,In,Ctx,NotUsed> create()

fromPairs

public <In,
CtxIn,
Out,
CtxOut,
Mat>
FlowWithContext<In,CtxIn,Out,CtxOut,Mat> fromPairs(Flow<Pair<In,CtxIn>,Pair<Out,CtxOut>,Mat> under)

Creates a FlowWithContext from a regular flow that operates on Pair<data, context> elements.

unsafeOptionalDataVia

public <FIn,
FOut,
FViaOut,
Ctx,
FMat,
FViaMat,
Mat>
FlowWithContext<FIn,Ctx,Optional<FViaOut>,Ctx,Mat> unsafeOptionalDataVia(FlowWithContext<FIn,Ctx,Optional<FOut>,Ctx,FMat> flow,
 Flow<FOut,FViaOut,FViaMat> viaFlow,
 Function2<FMat,FViaMat,Mat> combine)

Creates a FlowWithContext from an existing base FlowWithContext outputting an optional element and applying an additional viaFlow only if the element in the stream is defined.

'''Emits when''' the provided viaFlow runs with defined elements

'''Backpressures when''' the viaFlow runs for the defined elements and downstream backpressures

'''Completes when''' upstream completes

'''Cancels when''' downstream cancels

Parameters:

flow - The base flow that outputs an optional element

viaFlow - The flow that gets used if the optional element in is defined. This flow only works on the data portion of flow and ignores the context so this flow *must* not re-order, drop or emit multiple elements for one incoming element

combine - How to combine the materialized values of flow and viaFlow

Returns:

a FlowWithContext with the viaFlow applied onto defined elements of the flow. The output value is contained within an Optional which indicates whether the original flow's element had viaFlow applied.

Since:

1.1.0