syeedalireza-flashcore 1.0.0

High-Concurrency Flash Sale Engine

FlashCore: High-Concurrency Flash Sale Engine

FlashCore is an enterprise-grade, high-concurrency drop engine designed to handle massive traffic spikes during flash sales. It guarantees zero overselling using atomic Redis Lua scripts and ensures eventual consistency with a PostgreSQL database.

Developed by Alireza Aminzadeh (@syeedalireza).

🏗 Architecture & Design Patterns

• Clean Architecture: Strict separation of Domain, Application, and Infrastructure layers.
• Event-Driven: Uses Redis Pub/Sub (or Kafka in larger deployments) to decouple inventory reservation from order processing.
• Atomic Operations: Utilizes Redis Lua scripting to decrement inventory atomically, preventing race conditions during high traffic.
• Zero-Trust Security: Internal services (Redis, PostgreSQL) are strictly isolated within Docker networks and never exposed to the public internet.

🚀 Quick Start (Docker)

This project is fully containerized and optimized for both Windows (Docker Desktop) and Linux production environments.

1. Clone the repository:

   git clone https://github.com/syeedalireza/FlashCore.git
   cd FlashCore
   

2. Environment Setup:

   cp .env.example .env
   # Edit .env with your secure credentials
   

3. Build and Run:

   docker-compose up --build -d
   

4. Access the API Documentation: Open http://localhost/docs in your browser.

🛡 Security & DevOps Standards

• Non-Root Containers: The FastAPI application runs as a restricted user (UID 1000).
• Resource Limits: Strict CPU and Memory limits are enforced in docker-compose.yml to prevent host starvation.
• Network Isolation: Databases are not bound to 0.0.0.0. Only the reverse proxy/API gateway is exposed.
• Line Endings: Enforced LF line endings via .gitattributes for seamless Windows-to-Linux deployment.

🧪 Testing

Run the comprehensive test suite (Unit & Integration):

docker-compose exec api pytest -v --cov=src

📜 License

This project is licensed under the MIT License.