Focus on Java-related technologies: SSM, Spring ecosystem, microservices, MySQL, MyCat, clustering, distributed systems, middleware, Linux, networking, multithreading. Occasionally cover DevOps tools like Jenkins, Nexus, Docker, and ELK. Also share technical insights from time to time, committed to Java full-stack development!
Databasus is a free, open‑source, self‑hosted backup tool that supports PostgreSQL, MySQL, MariaDB and MongoDB, offers flexible scheduling, multiple storage backends, enterprise‑grade encryption, team collaboration features, and can be installed via a simple script or Docker.
This article explains how to update a Spring Boot application without stopping the service by allowing two processes to share the same port, detailing the underlying Tomcat embedding, DispatcherServlet handling, and providing step‑by‑step code and a live demo to achieve seamless zero‑downtime deployments.
This guide explains how to generate a unique traceId for each request, propagate it through REST, MQ, and RPC modules, and configure Log4j2 to include the traceId in log output, enabling clear end‑to‑end request tracing in a Spring Boot project.
WeKnora is an open‑source, LLM‑driven document understanding and semantic search framework that extracts structured content from PDFs, Word files, and images, builds a unified knowledge graph, and enables natural‑language queries through a modular RAG architecture with flexible deployment options.
Maven 4 introduces a revamped POM model (4.1.0), separates build and consumer POMs to eliminate unnecessary metadata, adds explicit artifact types for classpath and module jars, renames modules to subprojects, adopts a tree‑based lifecycle for true parallel builds, and provides powerful configuration and upgrade tools, all aimed at modern Java projects.
A recent production incident revealed duplicate order IDs caused by a flawed custom Snowflake implementation; the article reviews the standard Snowflake structure, pinpoints design mistakes such as a 31‑bit timestamp, IP‑based business IDs, and zeroed worker IDs, and offers concrete recommendations and proven library alternatives for safe distributed ID generation.
This guide details a step‑by‑step strategy for optimizing Druid in Spring Boot, covering environment setup, core pool parameters, monitoring, security hardening, leak detection, dynamic tuning, and common pitfalls to achieve high‑performance, stable, and secure database connections in production.
The article explains the limitations of Spring MVC's blocking model, introduces Spring WebFlux's reactive, asynchronous, non‑blocking architecture, compares annotation and functional programming models, details core components and request flow, and provides guidance on when and how to adopt WebFlux for high‑concurrency I/O‑intensive applications.
Using UUIDs as primary keys in MySQL can dramatically degrade performance on large tables due to larger index size, random inserts causing index splits, slower comparisons, and costly index refreshes on updates, but the impact can be mitigated with ordered UUIDs, binary storage, hybrid keys, or table partitioning.
This guide reviews the most popular AI code‑generation tools—including GitHub Copilot, Amazon CodeWhisperer, Tabnine, and domestic alternatives—detailing their features, ideal use cases, installation steps, advantages, caveats, practical results, and recommended tool combinations for individual developers, teams, and cloud projects.
