Cache-Aside Generator

The cache-aside generator creates a strongly typed CacheAsidePolicy<TResult> factory from declarative attributes. It is useful when cache TTLs and cacheability rules should live beside the read model contract while still producing the same runtime policy as the fluent API.

[GenerateCacheAsidePolicy(
    typeof(ProductReadModel),
    FactoryMethodName = "CreateGeneratedPolicy",
    PolicyName = "product-catalog",
    TimeToLiveMilliseconds = 300000)]
public static partial class ProductCatalogCacheAsidePolicy
{
    [CacheAsidePredicate]
    private static bool ShouldCache(ProductReadModel product)
        => product.Active;
}

The generated factory returns PatternKit.Cloud.CacheAside.CacheAsidePolicy<ProductReadModel> and applies the optional cache predicate.

Rules

The host type must be partial.
TimeToLiveMilliseconds must be non-negative.
A value of 0 means no expiration.
Cache predicates must be static bool methods with one TResult parameter.
Only one cache predicate can be declared.

Diagnostics use the PKCA prefix.

Table of Contents

Cache-Aside Generator

Rules