Understanding Software Architecture: From Basic Concepts to the COLA Framework
This article explains the fundamentals of software architecture, why architecture is needed, the responsibilities of architects, various architecture categories, common styles such as layered, CQRS, hexagonal and onion architectures, and introduces the open‑source COLA framework with its layered design, extension points and standards.
Architecture is an abstract description of system entities and their relationships, originating from the need to divide complex systems for parallel work.
It is required for any system, from aircraft to e‑commerce components, to control complexity and improve maintainability.
An architect’s duty is to simplify, making the system understandable for designers, implementers, and operators.
Software architecture provides a high‑level abstraction of components, their interactions, and design principles, focusing on controlling complexity rather than a specific layering.
Typical architecture categories include business, application, distributed, data, physical, and operations architectures.
Common architectural styles such as layered architecture, CQRS, hexagonal (port‑adapter), and onion architecture are discussed.
The COLA framework, an open‑source Alibaba project, combines these ideas with a three‑layer design (presentation, application, domain, infrastructure), extension points, and standardized conventions.
Overall, the article emphasizes separating core business logic from technical details to achieve maintainable, extensible systems.
Top Architect
Top Architect focuses on sharing practical architecture knowledge, covering enterprise, system, website, large‑scale distributed, and high‑availability architectures, plus architecture adjustments using internet technologies. We welcome idea‑driven, sharing‑oriented architects to exchange and learn together.
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