Class FlowWithContext<TIn, TCtxIn, TOut, TCtxOut, TMat>

A flow that provides operations which automatically propagate the context of an element. Only a subset of common operations from Flow is supported. As an escape hatch you can use [[FlowWithContextOps.via]] to manually provide the context propagation for otherwise unsupported operations.

An "empty" flow can be created by calling Create<TIn, TCtx>().

Inheritance
Object
GraphDelegate<FlowShape<System.ValueTuple<TIn, TCtxIn>, System.ValueTuple<TOut, TCtxOut>>, TMat>
FlowWithContext<TIn, TCtxIn, TOut, TCtxOut, TMat>
Implements
IGraph<FlowShape<System.ValueTuple<TIn, TCtxIn>, System.ValueTuple<TOut, TCtxOut>>, TMat>
IGraph<FlowShape<System.ValueTuple<TIn, TCtxIn>, System.ValueTuple<TOut, TCtxOut>>>
Inherited Members
Namespace: Akka.Streams.Dsl
Assembly: Akka.Streams.dll
Syntax
public sealed class FlowWithContext<TIn, TCtxIn, TOut, TCtxOut, TMat> : GraphDelegate<FlowShape<(TIn, TCtxIn), (TOut, TCtxOut)>, TMat>, IGraph<FlowShape<(TIn, TCtxIn), (TOut, TCtxOut)>, TMat>, IGraph<FlowShape<(TIn, TCtxIn), (TOut, TCtxOut)>>
Type Parameters
Name Description
TIn
TCtxIn
TOut
TCtxOut
TMat

Methods

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AsFlow()

Declaration
public Flow<(TIn, TCtxIn), (TOut, TCtxOut), TMat> AsFlow()
Returns
Type Description
Flow<System.ValueTuple<TIn, TCtxIn>, System.ValueTuple<TOut, TCtxOut>, TMat>
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MapMaterializedValue<TMat2>(Func<TMat, TMat2>)

Context-preserving variant of MapMaterializedValue<TMat2>(Func<TMat, TMat2>).

Declaration
public FlowWithContext<TIn, TCtxIn, TOut, TCtxOut, TMat2> MapMaterializedValue<TMat2>(Func<TMat, TMat2> combine)
Parameters
Type Name Description
Func<TMat, TMat2> combine
Returns
Type Description
FlowWithContext<TIn, TCtxIn, TOut, TCtxOut, TMat2>
Type Parameters
Name Description
TMat2
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Via<TOut2, TCtx2, TMat2>(IGraph<FlowShape<(TOut, TCtxOut), (TOut2, TCtx2)>, TMat2>)

Transform this flow by the regular flow. The given flow must support manual context propagation by taking and producing tuples of (data, context).

This can be used as an escape hatch for operations that are not (yet) provided with automatic context propagation here.

Declaration
public FlowWithContext<TIn, TCtxIn, TOut2, TCtx2, TMat> Via<TOut2, TCtx2, TMat2>(IGraph<FlowShape<(TOut, TCtxOut), (TOut2, TCtx2)>, TMat2> viaFlow)
Parameters
Type Name Description
IGraph<FlowShape<System.ValueTuple<TOut, TCtxOut>, System.ValueTuple<TOut2, TCtx2>>, TMat2> viaFlow
Returns
Type Description
FlowWithContext<TIn, TCtxIn, TOut2, TCtx2, TMat>
Type Parameters
Name Description
TOut2
TCtx2
TMat2
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ViaMaterialized<TOut2, TCtx2, TMat2, TMat3>(IGraph<FlowShape<(TOut, TCtxOut), (TOut2, TCtx2)>, TMat2>, Func<TMat, TMat2, TMat3>)

Transform this flow by the regular flow. The given flow must support manual context propagation by taking and producing tuples of (data, context).

This can be used as an escape hatch for operations that are not (yet) provided with automatic context propagation here.

The combine function is used to compose the materialized values of this flow and that flow into the materialized value of the resulting Flow.

Declaration
public FlowWithContext<TIn, TCtxIn, TOut2, TCtx2, TMat3> ViaMaterialized<TOut2, TCtx2, TMat2, TMat3>(IGraph<FlowShape<(TOut, TCtxOut), (TOut2, TCtx2)>, TMat2> viaFlow, Func<TMat, TMat2, TMat3> combine)
Parameters
Type Name Description
IGraph<FlowShape<System.ValueTuple<TOut, TCtxOut>, System.ValueTuple<TOut2, TCtx2>>, TMat2> viaFlow
Func<TMat, TMat2, TMat3> combine
Returns
Type Description
FlowWithContext<TIn, TCtxIn, TOut2, TCtx2, TMat3>
Type Parameters
Name Description
TOut2
TCtx2
TMat2
TMat3

Implements

Extension Methods