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!
This guide walks you through installing Docker, Git, and Node.js on a macOS machine, cloning the OpenClaw repository, configuring the gateway token, installing the Feishu plugin, and verifying that the AI agent can be controlled via Feishu messages, all without relying on cloud services.
This article introduces MyPerf4J, a Java‑agent based, low‑overhead performance monitoring tool that provides real‑time metrics such as RPS, latency percentiles, memory usage and GC statistics, and explains how to install, configure, run and uninstall it in development and production environments.
Upgrading to Spring Boot 4 brings Jackson 3, which reorganizes packages, replaces ObjectMapper with JsonMapper, changes the default date format to ISO‑8601, and converts checked exceptions to RuntimeException, requiring developers to adapt code, adjust configurations, and understand the design rationale to avoid runtime bugs.
This article explains the common reasons Spring transactions become ineffective or fail to roll back—such as wrong method visibility, final modifiers, self‑invocation, non‑Spring beans, multithreading, unsupported table engines, misconfigured propagation, swallowed exceptions, and improper rollback settings—while providing practical code solutions and best‑practice recommendations.
This guide walks you through installing n8n via npx or Docker, registering an account, understanding core concepts like workflows, nodes, and connections, and building a complete AI‑driven automation that fetches Weibo hot topics, processes them with a large language model, and emails the results.
This article explores why many enterprises continue to run on JDK 8 despite newer releases, examining compatibility breaks, stability, learning costs, third‑party library support, performance trade‑offs, commercial considerations, and toolchain readiness, and offers practical guidance for migration decisions.
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.
