YuckQi.Application.Core 10.0.2

YuckQi.Application.Core

A .NET library for bootstrapping a domain application project. Provides Mediator pipeline behaviors for logging and validation with FluentValidation integration.

Key Types

Abstractions

• IHasCacheInvalidationKeys – aspect marker for Mediator response types that trigger cache invalidation; exposes CacheKeys (IReadOnlySet<String>) to remove after the handler runs
• IHasCacheKey – aspect marker for cacheable Mediator messages (IMessage) with a cache key
• IHasValidationResults – aspect marker for Mediator response types that carry validation results; exposes ValidationResults (IReadOnlyCollection<Result>) for validation behavior

Behaviors

Pipeline behaviors are organized by purpose in subfolders and namespaces:

Caching (YuckQi.Application.Core.Behaviors.Caching)

• DistributedCacheInvalidationBehavior<TRequest, TResponse> – Removes keys from IDistributedCache after the handler runs when TResponse implements IHasCacheInvalidationKeys
• DistributedCachingBehavior<TRequest, TResponse> – Uses IDistributedCache to cache responses for cacheable requests; configuration via DistributedCachingBehaviorOptions record (same file)
• MemoryCacheInvalidationBehavior<TRequest, TResponse> – Removes keys from IMemoryCache after the handler runs when TResponse implements IHasCacheInvalidationKeys
• MemoryCachingBehavior<TRequest, TResponse> – Uses IMemoryCache to cache responses for cacheable requests; configuration via MemoryCachingBehaviorOptions record (same file)

Logging (YuckQi.Application.Core.Behaviors.Logging)

• LoggingBehavior<TRequest, TResponse> – Logs message handling start and completion

Validation (YuckQi.Application.Core.Behaviors.Validation)

• ValidationResponse / ValidationResponse<T> – recommended Mediator TResponse for use with ValidationBehavior. Implements IHasValidationResults. On validation failure the behavior returns new ValidationResponse / new ValidationResponse<T> { ValidationResults = … } with Value left null; on success handlers return the envelope with Value set. Keep payload/T free of validation concerns (and free of the new() constraint), so required members on payloads remain valid.
• ValidationBehavior<TRequest, TResponse> – Runs FluentValidation validators and short-circuits on error when TResponse implements IHasValidationResults (prefer ValidationResponse / ValidationResponse<T> as TResponse)

Dependencies

• FluentValidation
• Mediator.Abstractions
• Microsoft.Extensions.Caching.Abstractions
• Microsoft.Extensions.Caching.Memory
• Microsoft.Extensions.Logging.Abstractions
• YuckQi.Domain.Validation (project reference)

Installation

dotnet add package YuckQi.Application.Core