🎓 Student Projects (College Reports) · Sequence
Online Shopping System Sequence Diagram (Place an Order)
Checkout on a shopping website: stock check, payment and order confirmation.
Drawing diagram…
What this diagram shows
- Stock reserved before payment
- Alt branch for failed payment
- Seller notified to pack the order
Prompt used
Sequence diagram for placing an order on a shopping website: the customer clicks checkout; the order service checks and reserves stock with the inventory service; the payment gateway charges the customer; on success the order is confirmed, the seller is notified to pack it and the customer gets an SMS; on failure the stock reservation is released.
Mermaid code
sequenceDiagram
actor C as Customer
participant W as Website
participant O as Order Service
participant I as Inventory Service
participant P as Payment Gateway
participant N as Notification Service
C->>W: Checkout
W->>O: Create order
O->>I: Reserve stock
I-->>O: Reserved
O->>P: Charge customer
alt Payment successful
P-->>O: Success
O->>O: Confirm order
O->>N: Notify seller to pack
O->>N: Send order SMS to customer
O-->>W: Order confirmed
else Payment failed
P-->>O: Failed
O->>I: Release stock
O-->>W: Payment failed, try again
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