Sharing over a decade of architecture experience from Baidu, Alibaba, and Tencent.
This article explains what Java shallow copy (shallow cloning) is, outlines its typical use cases, and provides step‑by‑step implementations using both the Object.clone() method and a manual cloning approach with clear code examples.
This article explains Java deep copy, its differences from shallow copy, key use cases such as data safety and avoiding shared state, and demonstrates three implementation methods—using Cloneable, serialization, and third‑party libraries like Guava—complete with runnable code examples.
This article explains the role of Nginx load balancing, compares common algorithms such as Round Robin, Weighted Round Robin, and IP Hash, and provides a step‑by‑step configuration example with detailed parameter explanations for building a robust backend traffic distribution system.
This article explains load balancing fundamentals, shows how to configure Nginx for a Tomcat server pool, compares common balancing algorithms, describes OSI‑layer classifications, and outlines typical scenarios such as web farms, application clusters, databases, CDN, and cloud environments.
This article explains what cache pre‑warming is, why it is essential for high‑traffic applications, and compares three practical approaches—scheduled tasks, batch loading, and manual trigger APIs—highlighting their advantages, drawbacks, and typical usage scenarios.
This article provides a comprehensive overview of distributed scheduled tasks, describing their purpose, typical business scenarios, and detailed examinations of three popular frameworks—Quartz, Elastic‑Job, and XXL‑Job—including core components, clustering support, and practical usage considerations.
This article explains the Central Authentication Service (CAS) single sign‑on system, detailing its token‑based architecture, the roles of the CAS server, client, and protected services, and outlines typical scenarios such as e‑commerce, enterprise intranets, online platforms, and cloud services.
This article explains the Snowflake algorithm's principles, features, and Java implementation for generating high‑performance, ordered, and globally unique IDs in distributed systems, while highlighting key considerations such as node ID allocation and clock synchronization.
This guide explains the five ThreadPoolExecutor rejection policies in Java—AbortPolicy, CallerRunsPolicy, DiscardPolicy, DiscardOldestPolicy, and custom handlers—detailing their behavior, use‑cases, and providing concrete code examples for each.
This article explains what a queue is, classifies Java queue implementations—including blocking, non‑blocking, and double‑ended queues—provides detailed descriptions of each type, and offers code snippets and usage scenarios to help developers choose the right queue for their applications.
