Design and Architecture of a Cloud Shopping Cart System

Preface

The main functions of a shopping cart are: 1) Similar to a traditional store, it allows users to select multiple items for checkout at once. 2) It serves as a temporary collection area. 3) For merchants, the cart is one of the best places for promotion.

Early Stage

ERP split; Business service‑oriented split; WCS split.

Shopping Cart Functional Module Overview

Layered Design

Cluster Design

From the application layer perspective, the cloud shopping cart is designed with three parts – an interaction layer, a business assembly layer, and a basic service layer (horizontal). Each part consists of one or more clusters.

Interaction layer: includes the shopping page (add to cart, view cart) and the checkout page (checkout, immediate purchase, submit order for payment). Business assembly layer: provides standard shopping cart processes and non‑standard processes. Basic service layer: encapsulates data delivery from peripheral systems and core functional services.

From the application cluster perspective, two clusters are designed – a shopping‑cart cluster and a settlement‑cart cluster (vertical).

Shopping‑cart cluster: high traffic, stores sensitive user information that must not be lost (basic purchase data). Settlement‑cart cluster: handles additional checkout information, which is less sensitive (payment configuration, etc.).

Technical Architecture Design

The distributed design aims to achieve the following goals:

Stability: the system must provide 24/7 reliable service. High Performance: the core system must deliver high performance and reliable service under concurrent load. Elasticity: resources can be smoothly scaled (e.g., using VM, LXC) to handle traffic spikes. No Single Point of Failure: the system avoids any single point of failure. Fault Masking Automation: automatic fault isolation for network, application, or database failures.

Three‑Level Cache

Asynchronous Checks

Heterogeneous Storage

Advantages: simple workflow.

Disadvantages: traffic spikes and high concurrency.

Shopping Cart Payment Scheme

Heterogeneous Solution for the Payment Middle‑Platform

Nginx+LUA Aggregated Business Front‑End Interface Merging

Anti‑Scalping

Multi‑Dimensional User Feature Identification

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