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🛒 Hongmeng Distributed Mall Development Streamline Guide: Core Architecture and Practical Points

1. Overview of the project core architecture

1. Distributed Scenario Positioning

  • Multi-device collaboration: mobile phone (interactive core), tablet (large screen display), watch (fast operation)
  • Core requirements: real-time shopping cart synchronization, cross-device settlement, multi-terminal state maintenance

2. Four-layer architecture design

Front-end display layer (UI for each device) → Business logic layer (distributed services) → Data storage layer (distributed database) → Device management layer (task scheduling + security)
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3. Service Splitting Principle

  • Products and services (display/search), shopping cart services (cross-device synchronization), payment services (safety priority)

2. Distributed data synchronization core

1. Key points of data model

  • Shopping cart model contains fields such as user ID, product list, total price, update time, etc.
  • Use DistributedData to achieve real-time cross-device synchronization

2. Synchronization Policy

  • Combination of local cache + distributed storage, update locally first and then synchronize remotely
  • Subscribe to data change events and refresh the UI of each device in real time

3. Cross-device task scheduling

1. Task allocation principle

  • Calculate tasks to tablets/mobile phones, pay tasks to mobile phones (safety)
  • Intelligent scheduling based on device type (tablet/phone/wearable)

2. Core Process

  1. Watch start settlement → 2. Tablet calculate total price → 3. Mobile phone start payment → 4. All devices synchronize order status

4. Key points of multi-device UI adaptation

1. Responsive Design

  • Grid layout for tablets, and list layout for mobile phones/watches
  • Detect device type through tool functions such as isTabletDevice()

2. Component adaptation example

  • Shopping cart list: double-row display on tablets, simplified into single-row cards

5. Distributed payment process

1. Security-first policy

  • Payment tasks are forcibly distributed to mobile phone devices to avoid sensitive operations such as watches and other low-security devices
  • Payment password encrypted storage, combining device ID and user ID to generate encryption keys

2. Cross-device process

  • Watch click to settle → Mobile phone receive tasks to adjust payment SDK → All devices synchronize order status

6. Safety and performance optimization

1. Core security measures

  • Sensitive data encryption storage (EncryptedStorage)
  • Dynamic permission application (key permissions such as payment/storage)

2. Performance optimization results
| Optimization | Improvement |
|--------------|------------|

| Startup Time | 46.7% |
| Cart Loading | 61.1% |
| Cross-device synchronization | 75% |

7. Practical Golden Rules

  1. Data first: Design a distributed data model first, and then develop functions
  2. ** Device adaptation**: Start designing from a small screen (watch) and then expanding to a large screen
  3. Task Diversion: Assign tasks according to device capabilities to avoid centralized calls

Tip avoidance tips:

  • Avoid overdistributed, and local processing is preferred for simple functions
  • All cross-device calls must include a retry mechanism

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