E‑commerce, SaaS, AI architect; DDD enthusiast; SKILL enthusiast
The article walks through Redis’s two persistence options—RDB snapshots and AOF logs—detailing how each works, their advantages and drawbacks, and why interviewees should understand their differences, including AOF rewrite compression, to answer interview questions accurately.
The article walks through the challenges of growing data volumes, compares master‑slave, vertical, horizontal, and sharding‑plus‑partitioning architectures, explains their pros and cons, and provides concrete guidance on selecting and implementing a suitable database solution, including middleware options and real‑world case studies.
The article walks through a step‑by‑step evolution of a simple isEmpty utility, demonstrates proper JUnit assertions, introduces Mockito for isolating complex service logic, and explains Spring Boot Test components, illustrating why thorough unit testing saves time and improves code quality.
The article details how a business‑oriented company built an architecture committee, secured leadership support, defined clear design principles, restructured a monolithic common package into modular base projects, and used concrete case studies and team‑wide promotion to successfully evolve its technical architecture.
The author recounts a real‑world incident where a Spring @Transactional annotation caused database connection exhaustion, deadlocks, and a production outage, explains how long‑running transactions arise from holding a single connection during costly operations, and offers practical ways to avoid them by splitting methods or using programmatic transactions.
The article shares five practical lessons from a senior engineer on how to manage upstream product interactions, run projects, coordinate testing, lead teams, and communicate with super‑iors, emphasizing early bug prevention, clear reporting, and empowering team members.
The article explains how the critical flicker frequency (CFF) varies across species and individuals, influencing time perception, age‑related speed of experience, and gaming performance, and cites experiments by Kevin Healy and David Eagleman to illustrate these effects.
The article examines why programmers over 40 face age bias in the tech job market, explains that compensation reflects replaceability rather than value, and proposes three actionable mindsets—choosing an expert or management track, building an ABZ plan, and becoming a team’s indispensable resource—to revive career prospects.
This article examines three frequent challenges when using Feign in Spring Cloud—where to place the client, whether to wrap Feign interfaces, and how to handle business exceptions—offering a detailed comparison of two call styles, a ResponseBodyAdvice‑based wrapper solution, and a custom error decoder to propagate original exceptions.
The author recounts how a high‑school love for graphic design led to Windows Mobile theme hacking, a prize‑winning custom Wubi input layout, Xiaomi theme creation with MAML DSL and WebSocket push, and a later product concept that was ultimately blocked, illustrating the evolution from UI hobbyist to self‑taught developer.
