E‑commerce, SaaS, AI architect; DDD enthusiast; SKILL enthusiast
This article explains core performance metrics such as QPS, TPS, and concurrency, introduces related indicators like PV, UV, DAU/MAU, describes how to calculate system throughput, outlines testing perspectives, and provides practical design patterns and tips for building robust flash‑sale systems.
The article explains why the last six digits of Taobao order numbers are constant, revealing the “gene” method that embeds a hashed user identifier to bind orders to specific shards, thereby improving query performance, ensuring balanced data distribution, and supporting scalability in large e‑commerce systems.
This step‑by‑step tutorial shows how to create a simple AI‑driven mini‑game on the Coze platform in half an hour, covering account setup, agent creation, prompt design, debugging, publishing, advanced prompt techniques, and common pitfalls.
The article analyzes the current pain points of an order middle platform, proposes standardized core field storage, evaluates four extension storage schemes (vertical tables, wide table, JSON, KV table), and presents a two‑stage implementation roadmap that combines a large middle platform with a small‑chimney architecture for unified ordering, querying, and operational workflows.
The article explains how automatic @Autowired injection can tightly couple domain models to the Spring container, hide dependencies, hinder testing, create circular‑dependency risks, and violate clean architecture, then demonstrates an explicit‑dependency approach with a custom SpringContext utility, compares both methods, and offers practical guidelines for layered design and testing.
DeepSeek analyzes eight 2025 wealth trends—housing prices, A‑share market, gold, hot careers, emerging cities, automotive pricing, and economic confidence—providing a clear framework, data‑backed scenarios, and practical recommendations for investors and job seekers.
The article explains the DDD rich (or active) model, its core characteristics, compares it with the anemic model, and shows how to apply it in a shared‑rental billing domain using Java, DDD layers, domain events, and a lightweight framework.
The article explains why adopting a message‑queue improves microservice decoupling and responsibility boundaries, then details the design of a pluggable Base‑MQ component—including @MQEventListener, MQEvent base class, configuration, and MQClient interface—followed by concrete implementations for RocketMQ, Kafka, Redis and RabbitMQ, an example event flow, and guidance for extending the framework.
The article details a SaaS company's two‑month development of an AI‑powered skin‑analysis solution, illustrating how DDD’s four‑color modeling split health services into aggregates, integrated Face++ APIs, and delivered a 30‑second, 30‑dimension skin report that attracted over 80 000 users and 9 000 orders.
This article walks through three ways to map JSON columns to Java objects in MyBatis, explains why simple String or JSONObject approaches are fragile, and provides a complete custom TypeHandler implementation, registration, and usage example for complex entity fields.
