MediatR VS Polly

Compare MediatR vs Polly and see what are their differences.

MediatR

Simple, unambitious mediator implementation in .NET (by jbogard)

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+. (by App-vNext)
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MediatR Polly
53 52
10,533 12,900
- 1.4%
6.2 9.8
2 days ago 1 day ago
C# C#
Apache License 2.0 BSD 3-clause "New" or "Revised" License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

MediatR

Posts with mentions or reviews of MediatR. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-02-27.
  • The Monad Invasion - Part 2: Monads in Action!
    3 projects | dev.to | 27 Feb 2024
    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).
  • How small is the smallest .NET Hello World binary?
    8 projects | news.ycombinator.com | 9 Jul 2023
    The widely used MediatR library[0] could be used to do that as well, just FYI.

    [0]: https://github.com/jbogard/MediatR

  • Exception handling between controller and service
    6 projects | /r/dotnet | 1 Jul 2023
  • Is MediatR the only real CQRS solution for .Net?
    4 projects | /r/dotnet | 6 May 2023
    From: https://github.com/jbogard/MediatR
  • Easiest way to build the fastest REST API in C# and .NET 7 using CQRS
    4 projects | dev.to | 25 Apr 2023
    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.
  • MVVM Question: How do you manage the interaction between Model and ViewModel?
    4 projects | /r/csharp | 3 Apr 2023
    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.
    4 projects | /r/csharp | 3 Apr 2023
    Typically if you want to notify interested parties (ViewModels in case of WPF) of Model changes you'd use some kind of pub-sub mechanism like Reactive Extensions or MediatR. Your ViewModel can subscribe to an event bus of some kind (either standalone or maybe exposed by an Aggregate if you follow DDD), your domain logic (which should be located in Model layer, not in ViewModel layer: Service, Repository, DDD Aggregate or whatever you'd like to call it) will then do something useful with your Model and publish the corresponding event to the event bus.
  • Async Methods after setting a property.
    2 projects | /r/csharp | 16 Mar 2023
    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.
  • I don't get why I should use Redux
    6 projects | /r/webdev | 9 Mar 2023
    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.
  • Nightclub Website
    6 projects | /r/Blazor | 23 Jan 2023
    MediatR - for CQRS

Polly

Posts with mentions or reviews of Polly. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-07-11.

What are some alternatives?

When comparing MediatR and Polly you can also consider the following projects:

Mediator.Net - A simple mediator for .Net for sending command, publishing event and request response with pipelines supported

RabbitMQ - Open source RabbitMQ: core server and tier 1 (built-in) plugins

Hangfire - An easy way to perform background job processing in .NET and .NET Core applications. No Windows Service or separate process required

Brighter - A framework for building messaging apps with .NET and C#.

ApiEndpoints - A project for supporting API Endpoints in ASP.NET Core web applications.

FluentValidation - A popular .NET validation library for building strongly-typed validation rules.

AutoMapper - A convention-based object-object mapper in .NET.

Redis - Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.

Jering.Javascript.NodeJS - Invoke Javascript in NodeJS, from C#

Refit - The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface.

Flurl.Http - Fluent URL builder and testable HTTP client for .NET