Simple, unambitious mediator implementation in .NET
In-process messaging with no dependencies.
Supports request/response, commands, queries, notifications and events, synchronous and async with intelligent dispatching via C# generic variance.
TimeWarp.Mediator is a fork of the excellent MediatR library by Jimmy Bogard. We created this fork to:
- ✅ Correct the spelling from "MediatR" to "Mediator"
- ✅ Release under The Unlicense for maximum freedom
- ✅ Maintain full API compatibility with MediatR
- ✅ Add helpful diagnostic tools like
GetPipelineInfo()
Migrating from MediatR is straightforward - see our migration guide for step-by-step instructions.
Simple mediator implementation in .NET
In-process messaging with no dependencies.
Supports request/response, commands, queries, notifications and events, synchronous and async with intelligent dispatching via C# generic variance.
Examples in the wiki.
You should install TimeWarp.Mediator with NuGet:
Install-Package TimeWarp.Mediator
Or via the .NET Core command line interface:
dotnet add package TimeWarp.Mediator
Either commands, from Package Manager Console or .NET Core CLI, will download and install TimeWarp.Mediator and all required dependencies.
To reference only the contracts for TimeWarp.Mediator, which includes:
IRequest(including generic variants)INotificationIStreamRequest
Add a package reference to TimeWarp.Mediator.Contracts
This package is useful in scenarios where your TimeWarp.Mediator contracts are in a separate assembly/project from handlers. Example scenarios include:
- API contracts
- GRPC contracts
- Blazor
TimeWarp.Mediator supports Microsoft.Extensions.DependencyInjection.Abstractions directly. To register various Mediator services and handlers:
services.AddMediator(cfg => cfg.RegisterServicesFromAssemblyContaining<Startup>());
or with an assembly:
services.AddMediator(cfg => cfg.RegisterServicesFromAssembly(typeof(Startup).Assembly));
This registers:
IMediatoras transientISenderas transientIPublisheras transientIRequestHandler<,>concrete implementations as transientIRequestHandler<>concrete implementations as transientINotificationHandler<>concrete implementations as transientIStreamRequestHandler<>concrete implementations as transientIRequestExceptionHandler<,,>concrete implementations as transientIRequestExceptionAction<,>)concrete implementations as transient
This also registers open generic implementations for:
INotificationHandler<>IRequestExceptionHandler<,,>IRequestExceptionAction<,>
To register behaviors, stream behaviors, pre/post processors:
services.AddMediator(cfg => {
cfg.RegisterServicesFromAssembly(typeof(Startup).Assembly);
cfg.AddBehavior<PingPongBehavior>();
cfg.AddStreamBehavior<PingPongStreamBehavior>();
cfg.AddRequestPreProcessor<PingPreProcessor>();
cfg.AddRequestPostProcessor<PingPongPostProcessor>();
cfg.AddOpenBehavior(typeof(GenericBehavior<,>));
});With additional methods for open generics and overloads for explicit service types.
TimeWarp Mediator is released under The Unlicense (see UNLICENSE). Original MediatR code by Jimmy Bogard is under Apache 2.0 (see NOTICE).