MediatR Pipeline Behavior Registration.

Startup.cs

// Register MediatR Pipeline Behaviors
services.AddTransient(typeof(IPipelineBehavior<,>), typeof(LoggingBehavior<,>));
services.AddTransient(typeof(IPipelineBehavior<,>), typeof(ValidationBehavior<,>));
services.AddTransient(typeof(IPipelineBehavior<,>), typeof(CachingBehavior<,>));
services.AddTransient(typeof(IPipelineBehavior<,>), typeof(FallbackBehavior<,>));
services.AddTransient(typeof(IPipelineBehavior<,>), typeof(RetryBehavior<,>));

// ICachePolicy discovery and registration
services.Scan(scan => scan
    .FromAssemblies(assembly)
    .AddClasses(classes => classes.AssignableTo(typeof(ICachePolicy<,>)))
    .AsImplementedInterfaces()
    .WithTransientLifetime());

// IFallbackHandler discovery and registration
services.Scan(scan => scan
    .FromAssemblies(typeof(Startup).Assembly)
    .AddClasses(classes => classes.AssignableTo(typeof(IFallbackHandler<,>)))
    .UsingRegistrationStrategy(RegistrationStrategy.Skip)
    .AsImplementedInterfaces()
    .WithTransientLifetime());

// IFallbackHandler discovery and registration
services.Scan(scan => scan
    .FromAssemblies(typeof(Startup).Assembly)
    .AddClasses(classes => classes.AssignableTo(typeof(IRetryableRequest<,>)))
    .UsingRegistrationStrategy(RegistrationStrategy.Skip)
    .AsImplementedInterfaces()
    .WithTransientLifetime());