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Spring Boot 3 projects quickly outgrow single‑module structures, so this guide shows how to split a codebase into Maven multi‑module layers, define clear dependency rules, configure parent and child POMs, and use ArchUnit tests to automatically enforce architectural boundaries during builds.
This article explains how to implement a double‑token JWT authentication scheme in Spring Boot 3.x, using short‑lived AccessTokens for API security and long‑lived RefreshTokens for seamless background renewal, while addressing token revocation, refresh thresholds, blacklist handling, and multi‑device considerations.
The article explains how Spring’s built‑in @Async and TransactionalEventListener mechanisms provide a lightweight, zero‑dependency alternative to external message queues for local asynchronous processing, detailing their advantages, limitations, and production‑grade enhancements such as custom thread pools, dead‑letter persistence, and clustering strategies.
Spring Data AOT in Spring Boot 4 moves all repository parsing, reflection and query generation to compile time, dramatically cutting startup time, reducing memory and Metaspace usage, enabling compile‑time SQL validation, simplifying GraalVM native‑image configuration, and providing measurable performance gains backed by real‑world benchmarks.
This tutorial shows how to integrate gRPC with Spring Boot 4.0 using the grpc‑spring‑boot‑starter in just four concise steps, covering a side‑by‑side comparison with REST, Maven setup, protobuf contract definition, server implementation, and client invocation with streaming support.
The article analyzes the fatal issues of using raw WebSocket clients for high‑frequency market feeds and presents a production‑grade, reusable connection‑pool design that adds rate limiting, automatic reconnection, heartbeat, hash‑based load balancing, fault isolation and full lifecycle management to support stable delivery of hundreds of thousands of subscriptions.
The article presents a comprehensive five‑layer risk‑control architecture—covering front‑end behavior verification, device fingerprinting, account profiling, IP network analysis, and backend request sequencing—designed to separate genuine shoppers from scalper scripts during high‑traffic flash‑sale events, using Redis‑based storage and dynamic thresholds to minimize false positives.
The article analyzes why simple auto‑increment or timestamp‑based IDs fail at massive scales, compares common distributed ID schemes, and presents an improved Snowflake‑plus‑segment hybrid solution with clock‑rollback protection, automatic machine/room allocation, and production‑grade safeguards for trillion‑level order processing.
This article details a complete Spring Boot implementation of a smart vending cabinet that uses WeChat QR‑code scanning to open doors, reports purchased items, and automatically deducts payment via WeChat's no‑password delegated‑deduction API, covering configuration, database design, code examples, and error‑handling strategies.
The article analyzes the limitations of native WebSocket for large‑scale, low‑bandwidth, and unreliable‑network scenarios and demonstrates how MQTT, especially with EMQX, provides built‑in message routing, QoS levels, offline storage, and effortless clustering, reducing development and operational overhead.
