A platform for Zhuanzhuan R&D and industry peers to learn and exchange technology, regularly sharing frontline experience and cutting‑edge topics. We welcome practical discussions and sharing; contact waterystone with any questions.
This article explains the concepts, creation methods, usage examples, and internal implementation details of fair and unfair locks in Java's ReentrantLock, comparing their performance characteristics and providing guidance on when to choose each type in multithreaded applications.
This article explains the motivations for adopting Prometheus, introduces its core components and metric types, and demonstrates how comprehensive monitoring of business‑critical data, failure events, QPS, latency, and underlying resources can improve system stability and accelerate fault response.
This article explains how to dramatically improve MyBatis-Plus batch insertion speed—up to 2000%—by enabling rewriteBatchedStatements, pre‑generating primary keys to handle foreign‑key relationships, applying proper JDBC batch settings, and using asynchronous multithreaded insertion with optimized connection‑pool and executor configurations.
This article details the purpose, technical evolution, architecture, data‑source unification, dimensional modeling, data‑warehouse layering, SQL‑as‑metric approach, and interactive design of a measurement platform built to improve R&D efficiency through systematic data collection and visualization.
This article explains the concept of code refactoring, its goals, timing, challenges, common scenarios, and practical techniques—including parameter extraction, guard clauses, strategy patterns, and IDE tools—providing Java examples and recommendations for improving code quality.
This article presents a comprehensive design of a high‑performance, fault‑tolerant message notification system, covering service partitioning, system architecture, idempotent processing, dynamic error detection, thread‑pool management, retry mechanisms, and stability measures such as traffic‑spike handling, resource isolation, third‑party protection, monitoring, and active‑active deployment.
This article describes the background, requirements, and architectural design of a custom counting system for a B2B second‑hand trading platform, covering dimension definitions, internal vs external implementations, data flow, persistence strategies, code interfaces, and read‑query optimizations.
This article explains why Spring transactions may fail, demonstrates simple examples with and without the @Transactional annotation, details the annotation’s definition and attributes, and provides a step‑by‑step source‑code analysis of transaction creation, commit, rollback, and cleanup in Spring 4.3.12.
This article analyzes why asynchronous Log4j2 logging becomes a performance bottleneck when handling massive mapping data, tracing the issue through Disruptor internals, stack‑trace location retrieval, and JNI calls, and proposes practical configuration and code adjustments to eliminate the slowdown.
This article reviews the necessity, benefits, and practical implementations of multi-task learning in e‑commerce search, detailing model selection, architecture extensions such as ESMM and ESM², and future directions for handling user behavior sequences and multi‑objective optimization.
