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This tutorial explains why microservices need a message queue, outlines RocketMQ’s core concepts, shows how to set up RocketMQ with Docker Compose, integrates it into Spring Boot projects with detailed producer and consumer code, provides testing steps, and lists common pitfalls and solutions.
This article shows how to move OAuth2 client credentials out of source code into a database, add dynamic registration, multi‑tenant isolation, encrypted secret storage, login‑failure throttling, audit logging, a management REST API, and provides testing steps and common pitfalls.
This article walks through building a Spring Security resource server with OAuth2, enabling method‑level, object‑level and URL‑level permission checks using annotations like @PreAuthorize, @PostAuthorize, @PostFilter, and demonstrates configuration, utility helpers, controller examples, testing steps, best practices, and common pitfalls.
This tutorial walks through adding OAuth2 authorization‑code flow and third‑party social login (GitHub, Google, WeChat) to a Spring Security authentication server, covering architecture, project structure, configuration, code implementation, testing steps, and common pitfalls.
This tutorial explains the JWT structure, shows how to add custom claims such as user ID, department and roles, implements token blacklisting for logout, handles refresh token logic, and provides step‑by‑step code and testing instructions for a Spring Security OAuth2 authentication system.
This tutorial walks through why OAuth2 is needed, its advantages, the project layout, Maven dependencies, YAML configurations, Java security and JWT setup, resource‑server integration, testing steps, and a side‑by‑side comparison of the four OAuth2 grant types, all with complete code examples.
This article shows how to replace traditional installable serial‑debug tools with a browser‑based, cross‑platform serial assistant that uses the Web Serial API for direct hardware access and Spring Boot 3 with WebSocket to relay data to the cloud, including architecture, code examples, and deployment pitfalls.
This article walks through the complete load‑testing and performance‑tuning workflow for a Spring Cloud microservice application, covering environment preparation, JMeter script creation, benchmark execution, bottleneck analysis, JVM, database pool, and Sentinel optimizations, and presents before‑and‑after results with a detailed checklist.
This article walks through migrating a Spring Cloud microservice suite from local Docker Compose to a production‑grade Kubernetes deployment, covering namespace setup, ConfigMaps, Secrets, service deployments, auto‑scaling, rolling updates, self‑healing, load balancing, Docker image builds, deployment scripts, common operational commands, and validation steps.
After building the order, stock, and point services along with Nacos, Seata, Sentinel, Prometheus, Grafana, and SkyWalking, this guide shows how to package all components into Docker images and use a single Docker Compose command to start the entire microservice system with one click, while addressing common pitfalls.
