Package org.apache.pekko.stream.javadsl

Class SourceWithContext$

java.lang.Object

org.apache.pekko.stream.javadsl.SourceWithContext$

public class SourceWithContext$
extends Object

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
SourceWithContext$()

Method Summary

Modifier and Type	Method	Description
<Out, CtxOut, Mat> SourceWithContext<Out,CtxOut,Mat>	fromPairs(Source<Pair<Out,CtxOut>,Mat> under)	Creates a SourceWithContext from a regular flow that operates on Pair<data, context> elements.
<SOut, FOut, Ctx, SMat, FMat, Mat> SourceWithContext<Optional<FOut>,Ctx,Mat>	unsafeOptionalDataVia(SourceWithContext<Optional<SOut>,Ctx,SMat> source, Flow<SOut,FOut,FMat> viaFlow, Function2<SMat,FMat,Mat> combine)	Creates a SourceWithContext from an existing base SourceWithContext 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 SourceWithContext$ MODULE$

Static reference to the singleton instance of this Scala object.

Constructor Details

SourceWithContext$

public SourceWithContext$()

Method Details

fromPairs

public <Out,
CtxOut,
Mat>
SourceWithContext<Out,CtxOut,Mat> fromPairs(Source<Pair<Out,CtxOut>,Mat> under)

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

unsafeOptionalDataVia

public <SOut,
FOut,
Ctx,
SMat,
FMat,
Mat>
SourceWithContext<Optional<FOut>,Ctx,Mat> unsafeOptionalDataVia(SourceWithContext<Optional<SOut>,Ctx,SMat> source,
 Flow<SOut,FOut,FMat> viaFlow,
 Function2<SMat,FMat,Mat> combine)

Creates a SourceWithContext from an existing base SourceWithContext 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:

source - The base source 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 source and viaFlow

Returns:

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

Since:

1.1.0