A public account focused on workplace, career growth, team management, and self-improvement. The author is the writer of books including 'SpringBoot Technology Insider' and 'Drools 8 Rule Engine: Core Technology and Practice'.
This article explains why Docker‑run creates directories owned by root, how missing user specifications cause permission denied errors for other applications, and provides step‑by‑step commands to identify the UID/GID and run containers with the correct non‑root user.
This guide shows how to install several JDK versions on macOS, configure environment variables and aliases for manual switching, and use the jenv tool for precise, per‑directory Java version management, including installation, configuration, and common troubleshooting steps.
This article walks through the evolution of a high‑traffic e‑commerce site—from a single‑machine setup to cloud‑native microservices—detailing each architectural milestone, the problems it solves, key technologies involved, and design principles for building scalable, highly available systems.
This article introduces eight common backend architecture patterns—single‑database single‑application, content distribution, query separation, microservices, multi‑level caching, sharding, elastic scaling, and multi‑data‑center—explaining their designs, typical use cases, step‑by‑step workflows, and the key advantages and drawbacks of each.
After taking over a system via a server image, the author uncovered malicious modifications that used a ternary expression to force id=1, causing MyBatis to generate a “where 1=1” clause that deleted the entire T_QUART_DATA table, and later discovered cron jobs that removed core jars, illustrating a thorough forensic debugging process.
This article explains the fundamentals of Spring transactions, demonstrates how to set up a Spring Boot project with MySQL and MyBatis, walks through declarative transaction usage, compares REQUIRED, REQUIRES_NEW, and NESTED propagation behaviors with code examples, and highlights common pitfalls and best‑practice steps.
Effective logging is essential for debugging, performance monitoring, and compliance, and this guide explains why developers should adopt good logging habits, outlines key log purposes, requirements for readability, performance, storage, timeliness, levels, content, and format, and provides concrete Log4j examples and code snippets.
This guide shows how to create a Bash script that compresses and backs up yesterday's log files, removes the originals, and schedules the process with a daily cron job to prevent disk‑space exhaustion on Linux systems.
RedisInsight is a powerful GUI for Redis that supports cluster management, SSL connections, and memory analysis; this guide walks through downloading, installing on Linux, configuring environment variables, running as a service, deploying via Kubernetes, and using the web UI to monitor and operate Redis instances.
This article explains Docker's background, how it differs from virtual machines, its practical advantages such as resource efficiency, fast startup, consistent environments, and continuous delivery, and introduces core concepts like images, containers, and repositories for modern cloud‑native development.
