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Akka.NETSubFlowOperationsBatchWeightedTOut, TOut2, TMat, TClosed Method
Allows a faster upstream to progress independently of a slower subscriber by aggregating elements into batches until the subscriber is ready to accept them.For example a batch step might concatenate ByteString elements up to the allowed max limit if the upstream publisher is faster. This element only rolls up elements if the upstream is faster, but if the downstream is faster it will not duplicate elements. Batching will apply for all elements, even if a single element cost is greater than the total allowed limit. In this case, previous batched elements will be emitted, then the "heavy" element will be emitted (after being applied with the seed function) without batching further elements with it, and then the rest of the incoming elements are batched. Emits when downstream stops backpressuring and there is a batched element available Backpressures when there are max weighted batched elements + 1 pending element and downstream backpressures Completes when upstream completes and there is no batched/pending element waiting Cancels when downstream cancels See also ,

Namespace:  Akka.Streams.Dsl
Assembly:  Akka.Streams (in Akka.Streams.dll) Version: 1.2.3.42 (1.2.3.42)
Syntax
public static SubFlow<TOut2, TMat, TClosed> BatchWeighted<TOut, TOut2, TMat, TClosed>(
	this SubFlow<TOut, TMat, TClosed> flow,
	long max,
	Func<TOut, long> costFunction,
	Func<TOut, TOut2> seed,
	Func<TOut2, TOut, TOut2> aggregate
)

Parameters

flow
Type: Akka.Streams.DslSubFlowTOut, TMat, TClosed
TBD
max
Type: SystemInt64
maximum weight of elements to batch before backpressuring upstream (must be positive non-zero)
costFunction
Type: SystemFuncTOut, Int64
a function to compute a single element weight
seed
Type: SystemFuncTOut, TOut2
Provides the first state for a batched value using the first unconsumed element as a start
aggregate
Type: SystemFuncTOut2, TOut, TOut2
Takes the currently batched value and the current pending element to produce a new aggregate

Type Parameters

TOut
TBD
TOut2
TBD
TMat
TBD
TClosed
TBD

Return Value

Type: SubFlowTOut2, TMat, TClosed
TBD

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type SubFlowTOut, TMat, TClosed. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
See Also

Reference