Caravel.MediatR 0.16.0

Caravel.MediatR

This package contains reusable MediatR behaviours.

Logging Behaviour

Creates an entry Log for the start and failure of each request in the pipeline. It will log the error in case the request fails.

builder.Services.AddMediatR(cfg =>
{
    cfg.RegisterServicesFromAssembly(Assembly.GetExecutingAssembly());
    cfg.AddOpenBehavior(typeof(LoggingRequestBehaviour<,>));
});

Validation and ResultValidation Behaviour

Validates requests using FluentValidation. It is recommended to use ResultValidationRequestBehaviour when using the Result pattern to avoid throwing unnecessary ValidationException.

builder.Services.AddMediatR(cfg =>
{
    cfg.RegisterServicesFromAssembly(Assembly.GetExecutingAssembly());
    cfg.AddOpenBehavior(typeof(ValidationRequestBehaviour<,>));
    cfg.AddOpenBehavior(typeof(ResultValidationRequestBehaviour<,>));
});

{
  "code": "invalid_fields",
  "title": "Invalid Fields",
  "status": 400,
  "errors": {
    "field1": ["error_1", "error_2"]
  }
}

Idempotent Behaviour

Ensures all requests implementing interface IIdempotentRequest are idempotent.

builder.Services.AddMediatR(cfg =>
{
    cfg.RegisterServicesFromAssembly(Assembly.GetExecutingAssembly());
    cfg.AddOpenBehavior(typeof(IdempotentRequestBehaviour<,>));
});

{
  "code": "duplicate_request",
  "title": "Duplicate request",
  "status": 204,
  "detail": "Duplicate request with Idempotent Key 53655b3d-48d5-4ac1-ba73-4318b3b702e8."
}