Metalama.Patterns.Caching 2024.1.21

About

The Metalama.Patterns.Caching package is a front-end library for caching. It simplifies caching method results and invalidating the cached results.

This package is designed for use with the Metalama.Patterns.Caching.Aspects package, which offers Metalama-based aspects for caching, cache invalidation, and cache key generation. However, the Metalama.Patterns.Caching package does not rely on the Metalama aspect framework, and it can be used independently or with another aspect framework.

Key Features

• Caching the return value of a method as a function of its arguments.
• Invalidation of cached method results, both directly and indirectly through cache dependencies.
• In-memory cache, Redis cache, Pub/Sub synchronized cache, L2 in-memory cache.
• Caching profiles for dynamically changing settings at runtime.
• Automatic reload of expired cached items.
• Cache key formatters through the Flashtrace.Formatters package.
• Value adapters for caching "special" types like streams or enumerables.
• Locking to prevent concurrent execution.

This package can interact with any cache implementation. The abstraction is provided by the CachingBackend class from the Metalama.Patterns.Caching.Backend package.

Main Types

The primary types in this package are:

• ICachingService is the main interface.
• CachingService is the primary implementation of ICachingService and should generally not be directly used unless you are not using dependency injection.
• CachingServiceFactory extends IServiceCollection and allows the addition of ICachingService to your application.
• CachedMethodMetadata represents the metadata of a cached method. If you are not using an aspect framework, you must create an instance of this class for each cached method.
• CacheKeyBuilder is the algorithm that generates the cache key based on the method metadata and its arguments.
• IValueAdapter is the abstraction for caching special types like streams or enumerables.

Additional Documentation

• Conceptual documentation: https://doc.postsharp.net/metalama/patterns/caching.
• API documentation: https://doc.postsharp.net/metalama/api/metalama-patterns-caching.

Related Packages

• Metalama.Patterns.Caching.Aspects provides an aspect-oriented API for the current package.
• Metalama.Patterns.Caching.Backend defines the CachingBackend abstraction and provides core implementations for in-memory and multi-layered caching.
• Metalama.Patterns.Caching.Backends.Redis offers the CachingBackend implementation for Redis.
• Metalama.Patterns.Caching.Backends.Azure implements pub/sub synchronization of distributed in-memory caches through Azure Message Bus.
• Flashtrace.Formatters provides an infrastructure for cache key formatting.