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 rules of platform coupons, demonstrates a concrete example, and details three generations of algorithms—from a Cartesian‑product approach to Map‑based and array‑index methods—highlighting their implementations, performance trade‑offs, and a comparative benchmark.
This article shares a recent graduate's journey into the software industry, offering practical advice on career direction, job search strategies, essential backend technologies, continuous learning, team integration, and balancing technical and business skills to succeed as a junior developer.
This article provides a comprehensive overview of Apache RocketMQ, covering its core concepts, message models, reliability mechanisms, ordered message challenges and solutions, as well as detailed explanations of transactional messages, including implementation principles, producer and broker workflows, and practical considerations for ensuring consistency in distributed systems.
This article presents a comprehensive analysis of the ZhaiZhai financial system's growing data volume and slow‑query issues, evaluates four storage solutions—including sharding, hot‑cold separation, TiDB, and OceanBase—selects TiDB as the optimal choice, and details the migration steps and Elasticsearch integration to improve performance and scalability.
This article describes the challenges and technical solutions for synchronizing billions of order records from a relational database to Elasticsearch, including multi‑source data reading, dynamic rate limiting, retry strategies, SPI‑based service integration, environment isolation, health‑checking, smooth migration, and structured logging, all implemented in a backend service called ECP.
This article details a step‑by‑step investigation of a container whose memory usage spiked to 99% due to large objects being allocated to the old generation under G1GC, explains the root cause, demonstrates reproducible tests with JVM flags and monitoring tools, and provides practical mitigation strategies.
This article introduces Bloom filters, explains their probabilistic principles, advantages and drawbacks, details how to add and query elements, derives false‑positive formulas, provides Guava, Redisson, Redis‑module, and custom bitmap implementations with code samples, and showcases real‑world business scenarios and performance benefits.
This article details the background, goals, design decisions, code architecture, deployment process, monitoring setup, and outcomes of a comprehensive backend refactoring effort for the ZhiZhi consumer installment platform, illustrating how modularization, design patterns, and incremental migration improve maintainability and performance.
This article introduces the design and implementation of a remote hot‑deployment component (Mark42/Jarvis) built on Java Agent and an IDEA plugin, analyzes the challenges of dynamic compilation in Spring‑Boot fat‑jar environments, presents solution choices, and shares practical experiences and future directions.
This article details a real‑world investigation of intermittent refund order failures caused by improper handling of transactions and message queues, explains the step‑by‑step debugging process, identifies large‑transaction timing issues, and presents a concrete fix that moves MQ sending until after transaction commit.
