Dedicated to sharing programmer-architect skills—Java backend, system, microservice, and distributed architectures—to help you become a senior architect.
This article provides a comprehensive, diagram‑driven analysis of Kubernetes networking, covering underlay and overlay models, the role of VLAN, OSPF, BGP, and various CNI plugins such as Flannel host‑gw, Calico BGP, IPVLAN/MACVLAN, Multus, and Danm, as well as tunnel technologies like VxLAN and IPIP.
This article systematically explains ten common authentication approaches—from basic HTTP authentication and session‑cookie mechanisms to token, JWT, SSO, OAuth 2.0, QR‑code login, and one‑click login—detailing their principles, workflows, advantages, drawbacks, and typical usage scenarios with concrete examples and code snippets.
This article provides an in‑depth technical overview of Redis, covering its single‑threaded model, core data structures, persistence options, master‑slave replication, Sentinel and cluster architectures, eviction policies, progressive rehash, skiplist implementation, bitmap usage for massive active‑user counting, and strategies for handling MySQL‑Redis write‑through consistency.
The article walks through the full payment chain in China—from an e‑commerce checkout on JD.com, through third‑party payment gateways, banking channels, and the central bank—detailing each subsystem such as cashier, transaction core, payment core, member, accounting and settlement layers.
This benchmark measures the peak memory consumption of one, ten‑thousand, one‑hundred‑thousand and one‑million concurrent tasks in Rust, Go, Java, C#, Node.js, Python and Elixir, revealing surprising differences such as Go using far more memory than Rust and .NET showing unusually low usage.
This article provides a comprehensive, hands‑on tutorial on Jenkins pipelines, covering the two syntax styles (Declarative and Scripted), pipeline structure, agents, stages, steps, post actions, parameters, triggers, environment variables, credentials, and practical Jenkinsfile examples for Kubernetes, Docker, and more.
The article explains the concept of delayed tasks versus scheduled tasks and evaluates several backend solutions—including database polling with Quartz, JDK DelayQueue, Netty's HashedWheelTimer, Redis ZSET, Redis key‑space notifications, and RabbitMQ delayed queues—detailing their implementations, code samples, advantages, and drawbacks for automatically cancelling orders that remain unpaid for a set period.
The article explains why front‑end/back‑end separation is needed, outlines the challenges of the MVC era, describes the SPA‑based separation model, and provides a detailed, versioned interface specification—including request/response formats, mock server workflow, and special field rules—to streamline collaborative development.
The article compares several ways of inserting 300,000 MySQL rows—single‑row loops, an un‑batched MyBatis attempt that hits the max_allowed_packet limit, and a tuned batch strategy that commits every 1,000 rows—showing how the optimized batch reduces the runtime from hours to just 13 seconds and summarizing best‑practice tips.
Chat2DB is a free open‑source multi‑database client that adds AI capabilities such as natural‑language‑to‑SQL, SQL‑to‑natural‑language, and performance suggestions; this guide walks through downloading, installing, configuring OpenAI keys, using its four main menus, and evaluating its SQL generation, explanation, and optimization functions.
