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Just.Cqrs (1.1.2)
Installation
dotnet nuget add source --name just --username your_username --password your_token dotnet add package --source just --version 1.1.2 Just.CqrsAbout this package
Lightweight, easy-to-use C# library designed to simplify the implementation of the Command Query Responsibility Segregation (CQRS) pattern.
Just.Cqrs
Inspired by MediatR
Just.Cqrs is a lightweight, easy-to-use C# library designed to simplify the implementation of the Command Query Responsibility Segregation (CQRS) pattern in .NET applications. With a focus on simplicity and flexibility, Just.Cqrs provides a clean and intuitive way to separate command and query logic.
Features
- Separate dispatching of Commands/Queries
- Middleware-like Behaviors
Compatibility
Just.Cqrs is built for .Net Standard 2.1 and .NET 8.0 and 9.0.
Getting Started
Install from NuGet.org
# install the package using NuGet
dotnet add package Just.Cqrs
Register in DI with IServiceCollection
services.AddCqrs(opt => opt
.AddQueryHandler<SomeQueryHandler>()
.AddCommandHandler<SomeCommandHandler>()
.AddBehavior<SomeQueryBehavior>()
.AddOpenBehavior(typeof(LoggingBehavior<,>))
);
Example Usage
Define a Query and Handler
record GetUserByIdQuery(int UserId) : IKnownQuery<User>;
class GetUserByIdQueryHandler : IQueryHandler<GetUserByIdQuery, User>
{
public ValueTask<User> Handle(GetUserByIdQuery query, CancellationToken cancellationToken)
{
// Fetch user logic here
}
}
// Use Dispatcher to execute the query
class GetUserByIdUseCase(IQueryDispatcher dispatcher)
{
public async Task<IResult> Execute(int userId, CancellationToken cancellationToken)
{
var user = await dispatcher.Dispatch(new GetUserByIdQuery(userId), cancellationToken);
}
}
* the same principles apply to commands
Define a Behavior
class LoggingBehavior<TRequest, TResult>(ILogger logger) : IDispatchBehavior<TRequest, TResult>
where TRequest: notnull
{
public async ValueTask<TResult> Handle(
TRequest request,
DispatchFurtherDelegate<TResult> next,
CancellationToken cancellationToken)
{
logger.LogInformation("Handling request: {RequestType}", typeof(TRequest).Name);
var result = await next();
logger.LogInformation("Request handled: {RequestType}", typeof(TRequest).Name);
return result;
}
}
class SomeQueryBehavior : IDispatchBehavior<SomeQuery, SomeQueryResult>
{
public async ValueTask<SomeQueryResult> Handle(
SomeQuery request,
DispatchFurtherDelegate<SomeQueryResult> next,
CancellationToken cancellationToken)
{
// do something
return await next();
}
}
License
Just.Cqrs is licensed under the MIT License.
Dependencies
Details
Assets (2)
Versions (3)
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just.cqrs.1.1.2.nupkg
32 KiB
just.cqrs.nuspec
1.9 KiB