⚡ Caching Solution – High-Performance Caching in .NET 9 🚀

🎯 Overview

This .NET 9 Caching Solution demonstrates multiple caching techniques using ASP.NET Core, including In-Memory Caching, Distributed Caching (Redis), Output Caching, and Response Caching. The goal is to optimize API performance, reduce database load, and enhance scalability for modern applications.

Why Caching?

• 🚀 Speed Up Responses – Reduce API response time with fast data retrieval.
• 🛠 Reduce Server Load – Minimize unnecessary database queries.
• 📈 Scalability – Handle high-traffic applications efficiently.

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🌟 Features

✅ In-Memory Caching – Fast, efficient caching within the application.
✅ Distributed Caching (Redis) – Scalable caching solution for cloud and large-scale apps.
✅ Output Caching – Caches entire HTTP responses to boost performance.
✅ Response Caching – Adds caching headers for optimized client-side caching.
✅ Advanced Caching Strategies:

• 🔹 Sliding Expiration – Keeps cache alive if frequently accessed.
• 🔹 Post-Eviction Callbacks – Logs when cache entries expire.
• 🔹 Cache Dependencies – Invalidates cache when related data changes.

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🏗️ Architecture & Project Structure

📌 src/Caching.Api – Main API project with caching endpoints.
📌 src/Caching.Api/Services – Business logic for caching and product retrieval.
📌 src/Caching.Api/Endpoints – Defines API routes for caching functionalities.

🏛️ Implemented Caching Techniques

🔹 Memory Cache – Stores frequently accessed data in-memory.
🔹 Redis Cache – Provides distributed caching across multiple servers.
🔹 Output Cache – Caches HTTP responses at the server level.
🔹 Response Cache – Implements client-side cache control headers.

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🚀 Getting Started

📌 Prerequisites

✅ .NET 9 SDK
✅ Redis (for distributed caching)
✅ Docker (optional for Redis container)

Step 1: Clone the Repository

git clone https://github.com/yourusername/caching-solution.git
cd caching-solution

Step 2: Install Dependencies

dotnet restore

Step 3: Configure Redis (Optional, for Distributed Caching)

Update appsettings.json:

{
  "ConnectionStrings": {
    "Redis": "your_redis_connection_string"
  }
}

Step 4: Run Redis with Docker (Optional)

docker run -d -p 6379:6379 redis

Step 5: Run the Application

dotnet run --project src/Caching.Api

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🌍 API Endpoints

🔹 Basic Product Retrieval

Method	Endpoint	Description
GET	/products	Fetches products without caching

🔹 Memory Caching

Method	Endpoint	Description
GET	/absolute-cache-products	Memory cache with absolute expiration
GET	/sliding-cache-products	Memory cache with sliding expiration
GET	/eviction-callback-cache-products	Cache with post-eviction callback
GET	/priority-cache-products	Cache with priority handling
GET	/dependent-cache-products	Cache with dependencies

🔹 Distributed Caching (Memory + Redis)

Method	Endpoint	Description
GET	/memory-redis-cache-products	Products with in-memory + Redis caching
GET	/memory-redis-cache-products-sliding	Products with sliding expiration
GET	/memory-redis-cache-products-eviction-callback	Products with post-eviction callback
GET	/memory-redis-cache-products-dependency	Products with cache dependency

🔹 Output Caching

Method	Endpoint	Description
GET	/output-cache-products	Caches entire HTTP response
GET	/output-cache	Output cache with timestamp

🔹 Response Caching

Method	Endpoint	Description
GET	/response-cache-products	Adds cache control headers
GET	/response-cache	Response cache with vary header

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🧪 Testing

Unit Tests

Run unit tests for caching and API responses:

dotnet test

Manual API Testing

📌 Use Postman or Swagger UI to:
✅ Test without caching → /products
✅ Enable caching → /memory-cache-products
✅ Test Redis caching → /memory-redis-cache-products
✅ Check output caching → /output-cache-products

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🎯 Why Use This Project?

✅ Blazing-Fast API Responses – Implements multiple caching strategies.
✅ Scalable & Cloud-Ready – Uses Redis for distributed caching.
✅ Performance-Oriented – Reduces unnecessary database queries.
✅ Flexible & Configurable – Supports multiple expiration policies.
✅ Enterprise-Grade Architecture – Built using .NET 9 best practices.

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📜 License

This project is licensed under the MIT License. See LICENSE for details.

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📞 Contact

For feedback, contributions, or questions:
📧 Email: [email protected]
💻 GitHub: MrEshboboyev

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🚀 Supercharge your .NET APIs with advanced caching! Clone the repo & start optimizing today!