The era of big models - let’s see if big models can design a flash sale system

Flash kill system implementation plan

1. Backend architecture

   • Use Spring Boot as the backend framework.
   • Use Redis as a cache to speed up queries and reduce database pressure.
   • Use a message queue (such as Kafka or RabbitMQ) to handle requests under high concurrency.

2. Database Design

   • Use MySQL as the main database to store product information, user information, etc.
   • Use Redis as a cache to store product inventory, flash sale records, etc.

3. Core functions

   • Product management: add, view, and modify product information.
   • User management: registration, login, personal information management.
   • Flash sale function: users place orders, pay, and generate orders.
   • Inventory management: Update inventory in real time to ensure fairness of flash sales.

Core code implementation

This is just a simplified example and does not involve the complete application logic and code organization structure.

1. Product information storage

Use Redis to store product information, including product ID, name, inventory, etc.

import redis.clients.jedis.Jedis;  
  
public class Product {  
    private String id;  
    private String name;  
    private int stock;  
  
    public Product(String id, String name, int stock) {  
        this.id = id;  
        this.name = name;  
        this.stock = stock;  
    }  
  
    // getters and setters...  
}

1. Flash sale processing

When a user initiates a flash sale request, the inventory in Redis is first checked. If the inventory is sufficient, an order is generated and the inventory is deducted.

public class SeckillService {  
    private Jedis jedis;  
    private String productKey; // 商品在Redis中的key，如 "product:123"  
  
    public SeckillService(Jedis jedis, String productKey) {  
        this.jedis = jedis;  
        this.productKey = productKey;  
    }  
  
    public boolean seckill() {  
        int stock = jedis.get(productKey).equals("0") ? 0 : Integer.parseInt(jedis.get(productKey));  
        if (stock > 0) {  
            jedis.set(productKey, String.valueOf(stock - 1)); // 扣减库存  
            // 生成订单，并返回下单结果给前端...  
            return true; // 假设下单成功返回true，实际应用中可能还需要进一步处理下单逻辑。  
        } else {  
            return false; // 库存不足返回false。  
        }  
    }  
}

1. Redis storage

Use Jedis client to connect to Redis and store product information. This is just a simplified example. In actual applications, more exception handling and connection management need to be considered.

Note: The above code is just a simplified example. The code and logic involved in the actual flash sale system are much more complex. When designing and implementing a flash sale system, you also need to consider distributed locks, current limiting, anti-brushing strategies, database optimization and other issues.

It seems to be just that. It feels not that simple, but it still reflects the essential problem that the flash sale system needs to solve, which is how to use cache and message queue to deal with the problems caused by high concurrency.