Elegantn dataflow pomoc TPL Dataflow Is The Best

Elegantní dataflow pomocí TPL Dataflow Is The Best Library You're Not Using http: //blog. i 3 arnon. com/2016/05/23/tpl-dataflow

Motivation • lightweight actor library on top of TPL • messages passed from a producer to a consumer • consists of built-in blocks used for composing your dataflow • you don’t have to care about synchronization • no lock, Manual/Auto. Reset. Event etc • single responsibility • reusability – blocks might appear in multiple dataflows • parallel out of the box © 2018 Solar. Winds Worldwide, LLC. All rights reserved.

How to get started • nuget • System. Threading. Tasks. Dataflow • DO NOT USE Microsoft. Tpl. Dataflow nuget • Git. Hub: • dotnet/corefx/tree/master/src/System. Threading. Tasks. Dataflow • used to be part of. NET Framework till 4. 5 © 2018 Solar. Winds Worldwide, LLC. All rights reserved.

Contents • 9 default data blocks • execution – Action. Block, Transform. Many. Block • buffering – Buffer. Block, Broadcast. Block, Write. Once. Block • grouping – Batch. Block, Join. Block, Batched. Join. Block • Solar. Winds • Expiring. Batch. Block – Batch. Block + Timer © 2018 Solar. Winds Worldwide, LLC. All rights reserved.

Creating a dataflow – i. e. linking blocks together • ISource. Block<T>. Link. To(ITarget. Block<T>) • source. Link. To(target, options, criteria) • options • append (default: true) • whether a new link is appended or set as first • propagation (default: false) • criteria • disposable © 2018 Solar. Winds Worldwide, LLC. All rights reserved.

Block options • Max. Degree. Of. Parallelism (default: 1) • Ensure. Ordered (default: true) • Bounded. Capacity (default: max) • max number of messages that a block might hold • if reached, block rejects messages © 2018 Solar. Winds Worldwide, LLC. All rights reserved.

DEMO source: https: //new. siemens. com/global/en/markets/oil-gas/midstream/pipelines. html © 2018 Solar. Winds Worldwide, LLC. All

Additional topics to cover • completion • cancellation support • encapsulation • task schedulers

Recommendations • use read-only or immutable types for data being passed around • nuget System. Collections. Immutable • handle exceptions properly • use Rx for async errors - https: //github. com/dotnet/reactive • use functional Either<TResult, TException> • https: //github. com/Target. Process/Tp. Core. Functional#either-type • consider Akka. net in cross-computer scenarios • https: //www. youtube. com/watch? v=6 jh 6 ve. NLHtk © 2018 Solar. Winds Worldwide, LLC. All rights reserved.

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