OneOf
MediatR
OneOf | MediatR | |
---|---|---|
25 | 53 | |
3,225 | 10,641 | |
- | - | |
2.9 | 5.9 | |
3 months ago | 7 days ago | |
C# | C# | |
MIT License | Apache License 2.0 |
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OneOf
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The Monad Invasion - Part 1: What's a Monad?
OneOf
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Discriminated Unions: Essa feature faz falta no CSharp
Inclusive, para suportar esse tipo de funcionalidade, foi criada a biblioteca OneOf: mcintyre321/OneOf: Easy to use F#-like ~discriminated~ unions for C# with exhaustive compile time matching (github.com)
- Easy to use F#-like ~discriminated~ unions for C# with big compile time matching
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Rolled my own Result<T,E> type that seems to work better than others.
Then I found discussion of the OneOf package, and then found some simpler Result code. I tried using that code but I found the use of Match and lambdas meant I couldn't simply break out of the loop in my example.
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What's new in C# 12: overview
Until that feature lands there's this https://github.com/mcintyre321/OneOf which is pretty nice.
- The combined power of F# and C#
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Exception handling between controller and service
Yep, it's called result pattern, aforementioned above. There was two highlighted implementations - OneOf, FluentResults.
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Have you heard of AnyOf .NET Lib?
No he didn't. He made a video of the OneOf library. Not this one.
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Have you heard of AnyOf C# Library?
We already have OneOf https://github.com/mcintyre321/OneOf I've used it in Production multiple times and it's an awesome way to keep everything strongly typed and eliminate null reference exceptions.
- What your hidden nuget gems ?
MediatR
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The Monad Invasion - Part 2: Monads in Action!
You probably noticed that .SetName() returns a Either. You may have come across Unit in libraries like MediatR or Language-Ext. It's a simple construct representing a type with only one possible value. We use it as a placeholder for operations that do not return a value but may return another state. In our example, .SetName() is a Command that does not return a value but may fail. Therefore, the monad Either carries two possible states: Right (without value) or Left (with an Error).
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How small is the smallest .NET Hello World binary?
The widely used MediatR library[0] could be used to do that as well, just FYI.
[0]: https://github.com/jbogard/MediatR
- Cannot use disposed service
- Exception handling between controller and service
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CQRS: How to handle duplicate queries inside a CommandHandler
Hope this GH issue shed some light on why injecting handler inside another handler is not good https://github.com/jbogard/MediatR/issues/400
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Is MediatR the only real CQRS solution for .Net?
From: https://github.com/jbogard/MediatR
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Easiest way to build the fastest REST API in C# and .NET 7 using CQRS
I gave it a go and I was impressed how easy and fast it was to set it all up. Since I'm not a big fan of REPR pattern almost all my projects are using CQRS pattern with a help of MediatR ](https://github.com/jbogard/MediatR) I immediately started going over something similar that Fast Endpoints offer which is a command bus.
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MVVM Question: How do you manage the interaction between Model and ViewModel?
I'd use a dedicated event bus based on Reactive Extensions or MediatR to publish domain events from your domain services. This probably doesn't solve all your ViewModel update problems as is, maybe you need to revise the granularity (maybe you can have smaller ViewModels that refresh single property that exposes the Model) and lifespan (sometimes you can create a ViewModel, make it perform it's task and then discard it completely) of your ViewModels.
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Async Methods after setting a property.
If you're finding yourself in a situation where you need to turn this behavior into a pattern because there are a lot of View Models that need to execute async business logic in response to some changes, I'd go with something like MediatR or Reactive Extensions. The idea is, again, that some other, probably business-level, component listens to changes in a decoupled way (that means it doesn't subscribe directly to your View Model, but to an event bus instead). View Model publishes change events to the event bus, and business-component reacts to these events by executing the business logic.
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I don't get why I should use Redux
What people really want is to design the logic of an app independently from the component hierarchy. That means you need to store state somewhere other than the components and you need to dispatch events that are not attached to the component hierarchy. Also, a one way data flow has well known benefits as described by things like CQRS, RabbitMQ, and MediatR.
What are some alternatives?
language-ext - C# functional language extensions - a base class library for functional programming
Mediator.Net - A simple mediator for .Net for sending command, publishing event and request response with pipelines supported
csharp-monad - Library of monads for C#
RabbitMQ - Open source RabbitMQ: core server and tier 1 (built-in) plugins
ValueOf - Deal with Primitive Obsession - define ValueObjects in a single line (of C#).
Polly - Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner. From version 6.0.1, Polly targets .NET Standard 1.1 and 2.0+.
csharplang - The official repo for the design of the C# programming language
Brighter - A framework for building messaging apps with .NET and C#.
Rop.OneOfExtensionGenerator - OneOf Helper Extensions Source Generator
ApiEndpoints - A project for supporting API Endpoints in ASP.NET Core web applications.
BinderTool - Dark Souls II / Dark Souls III / Bloodborne bdt, bhd, bnd, dcx, tpf, fmg and param unpacking tool
FluentValidation - A popular .NET validation library for building strongly-typed validation rules.