First‑line development experience at multiple leading tech firms; now a software architect at a Shanghai state‑owned enterprise and founder of Programming Yanxuan. Nearly 300k followers online; expertise in distributed system design, AIGC application development, and quantitative finance investing.
This article explains how RocketMQ's transaction messaging can break tight coupling between heterogeneous systems in fund companies, outlines topic/tag classification, compares distributed‑transaction solutions, and details the end‑to‑end workflow and consumption guarantees for financial use cases.
This article explains how to build a lossless flash‑sale system that can handle massive, simultaneous traffic by using system isolation, multi‑level caching, rate‑limiting, RPC grouping, and asynchronous message queues to smooth peaks without sacrificing performance.
This article examines the trade‑offs between simple and detailed events in event‑driven architectures, illustrating their impact on scalability, coupling, and system design through concrete examples, design guidelines, and considerations from domain‑driven design to practical implementation.
This article delves into the tactical design of Domain‑Driven Design, explaining core building blocks such as entities, value objects, aggregates, domain events, repositories, application services, and domain services, and shows how they help keep business logic centralized and expressive.
This article explains how to apply functional programming concepts such as composition, monads, and applicatives to Domain‑Driven Design, covering code organization, trust boundaries, state‑machine modeling, and maintaining domain purity while highlighting the benefits and trade‑offs of this approach.
This article explains how to choose between fine‑grained and coarse‑grained resource designs in REST APIs, illustrating trade‑offs with blog‑post examples, showing how to model business processes as intent resources, and discussing the impact of avoiding PUT in favor of CQRS.
LangGraph Studio is a new visual IDE that simplifies the development, debugging, and interactive iteration of complex LLM‑based agent applications, offering features such as graph visualization, real‑time state inspection, code‑aware debugging, and seamless integration with LangSmith, with step‑by‑step guidance for desktop users.
This article explains how to use a token‑bucket rate limiter, such as the one provided by Resilience4j, to keep event‑driven microservices within the request/response API traffic limits, detailing the underlying problem, integration steps, code example, and practical considerations.
This article explains why tightly coupled request/response communication can overload downstream services, introduces the circuit‑breaker pattern (including its three‑state state machine), and shows step‑by‑step how to integrate a circuit breaker into event‑driven microservices to pause event retrieval, handle state transitions, and avoid dead‑letter queues.
This article explains how an event‑center abstracts domain events, offers a clear architecture and powerful features, compares it with raw message‑queue solutions, and provides Java code examples to help backend engineers adopt a more maintainable, decoupled design.
