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Business Domains

The Multi-Cloud E-Commerce Demo maps to distinct logic modules that manage specific functions within an e-commerce lifecycle. This section highlights the roles and responsibilities of each discrete service domain without examining networking specifics or infrastructural operations.

1. Domain Overview

The system consists of core storefront orchestrators, centralized operations systems, risk-analysis computation, and asynchronous fulfillment backends.

flowchart TD
    Customer([Customer]) -.-> |Submit Cart| Checkout

    subgraph Storefront Core
        Checkout[Checkout Service]
    end

    subgraph Operations & Data
        Inventory[Inventory Service]
        CRM[CRM Service]
        Accounting[Accounting Service]
    end

    subgraph Logistics Operations
        Warehouse[Warehouse Operations]
        OrderMgmt[Order Management]
    end

    subgraph B2B Integrations
        PartnerAPI[Partner API Service]
        Apigee[API Gateway]
        Partner([3PL Carrier / Partner])
        Partner -.-> Apigee
        Apigee --> PartnerAPI
    end

    subgraph Multi-Cloud Services
        Fraud[Fraud/Analytics Engine]
    end

    subgraph Observability & AI
        CRMAgent["CRM Agent / Concierge (Vertex AI)"]
        TrafficCollector["OOB Traffic Collector (DPI)"]
    end

    Checkout --> Inventory
    Checkout --> CRM
    Checkout --> Fraud
    Checkout --> OrderMgmt
    OrderMgmt --> Warehouse
    OrderMgmt --> Accounting
    PartnerAPI --> Warehouse
    Customer -.-> CRMAgent
    Checkout -.-> TrafficCollector


2. Logical Components Breakdown

2.1 Storefront & Presentation

  • Checkout Service: The primary entry point for concluding an online transaction. Upon cart submission, this orchestrator coordinates multiple checks—including stock validation against the inventory system and risk analysis against the fraud engine—before finalizing the payment procedure and triggering fulfillment.

2.2 Core Operations

  • Inventory Service: Manages physical stock calculations and availability logic. It locks stock items temporarily during the synchronous checkout phase to prevent overselling and permanently adjusts ledgers whenever shipments originate.
  • Customer Relationship Management (CRM) Service: Acts as the centralized source of truth for customer identities. It processes account lookups, enforces returning loyalty tier conditions, and manages personal data records required for billing.
  • Accounting Service: Evaluates and records the completed transactions into a centralized ledger natively for tax recognition, historical analytics, and revenue balancing protocols. It pairs transaction IDs with the appropriate internal customer records.

2.3 Fulfillment & Logistics

  • Order Management System (OrderManagement): An internal event listener responsible strictly for order orchestration after the transaction successfully completes. It ingests order messages directly off an asynchronous bus and triggers downstream processes across multiple warehouses or accounting systems.
  • Warehouse Operations: Handles physical shipping dispatch calculations. It provides shipping latency windows natively to the storefront and triggers final stock reductions inside the core Inventory datastore.

2.4 Partner Integrations

  • API Management (Apigee): A managed gateway platform responsible solely for evaluating specific quotas, rate limits, and API signatures for external third-party traffic entering the corporate network.
  • Partner API Service: A specialized internal endpoint proxying authenticated data inward, allowing Third-Party Logistics (3PL) carriers to programmatically transmit localized delivery statuses or sync product catalog IDs directly using securely exposed internal endpoints.

2.5 Multi-Cloud Services

  • Fraud Detection / Analytics Engine: An external service (hosted natively on Microsoft Azure) that evaluates incoming HTTP transaction metadata against heuristic engines to generate a boolean risk score instantly, actively attempting to decline suspicious payloads before they affect physical fulfillment.

2.6 AI & Intelligence

  • CRM Agent (Concierge): An autonomous AI assistant built on the Google Agent Development Kit (ADK) leveraging Vertex AI. It interfaces with the CRM Service directly, enabling natural language customer support interactions and intelligent data retrieval natively.

2.7 Observability & Security

  • Out-of-Band (OOB) Traffic Collector: A dedicated Python-based Deep Packet Inspection (DPI) engine that ingests mirrored network traffic. By decapsulating Geneve (UDP 6081) packet tunnels in real-time, it autonomously identifies malicious payloads (like SQLi or XSS) propagating internally across the multi-cloud topology without impacting the synchronous path.