Dedicated to sharing programmer-architect skills—Java backend, system, microservice, and distributed architectures—to help you become a senior architect.
This article walks through a practical implementation of gray (canary) release in a Spring Cloud ecosystem using Nacos for service discovery, Spring Cloud Gateway for routing, Ribbon (or Spring Cloud LoadBalancer) for load balancing, and custom interceptors to control traffic based on request metadata.
The article outlines a step‑by‑step learning system compiled by senior architects, covering skill foundations, source‑code analysis, distributed and microservice architectures, concurrency, performance tuning, essential Java tools, and a hands‑on e‑commerce project to help developers become well‑rounded architects.
This article walks through building a Netty‑based WebSocket server integrated with Spring Boot, configuring the channel pipeline, implementing custom handlers, exposing a push‑message service, and testing the end‑to‑end flow that enables the backend to push real‑time messages to web clients.
The article shows how a growing list of if‑else checks for user eligibility becomes hard to maintain, then walks through designing and implementing a Java rule engine—defining rule abstractions, building an AND/OR executor, and demonstrating usage with concrete examples, while discussing its advantages and drawbacks.
The article examines why large database transactions inside API endpoints degrade performance, outlines issues such as data inconsistency, lock contention, undo‑log overhead, and DB pressure, and presents practical optimizations including removing remote RPC calls, using programmatic transactions, batch processing, splitting into smaller transactions, and asynchronous parallel execution with code examples.
This article walks through the design and implementation of a distributed image‑captcha login system using SpringBoot, Kaptcha, and Redis, comparing traditional session‑based approaches with a front‑back‑end separated architecture and providing complete code examples for each component.
The article reviews three free MySQL client alternatives—DBeaver, MySQL Workbench, and HeidiSQL—detailing their installation steps, supported databases, key features such as monitoring and ER diagrams, and why they can serve as practical replacements for the paid Navicat tool.
This article introduces an out‑of‑the‑box Nginx visual management platform that can be deployed with a single Docker‑Compose command, offering a web UI for configuring reverse proxies, SSL termination, advanced settings, and includes step‑by‑step setup, Docker network tips, health‑check configuration, and a link to the GitHub repository.
The article experimentally compares MySQL JOIN and IN queries across small, medium, and large data sets, showing that JOIN is generally faster for modest volumes while IN can become impractically long and error‑prone with massive lists, leaving neither approach ideal for all scenarios.
This article analyzes the constraints of loading a billion 1‑KB log records from HDFS/S3 into MySQL, evaluates single‑table limits, proposes batch inserts, sharding, file‑reading techniques, task coordination with Redis, Redisson, and Zookeeper, and offers practical performance‑tuning recommendations.
