Question

Draw sequence diagrams from the following:

• Selling books, software CDs and other products:
  • There are several possible scenarios for how buying and selling different products can be performed, so have flexibility in this functionality.
• Searching:
  • The users shall be able to search for products.
  • There will be several possible search modes, such as search by general category of products, keyword in item title, by author or publisher, by location of item (e.g., search only products in a particular country.)
  • It is expected that this database will grow large over time, and as you can imagine, it is very dynamic.
• User accounts:
  • They allow users to set preferences.
  • They allow buyers to see which products fit their preferences.
  • They can be used to recommend products to buyers.
• Notification System:
  • A buyer is notified when a product of her interest becomes available or similar products come to the market
  • A buyer is notified when her payment has been processed
• Interoperability
  • The system handles payment by handing the transaction off to a third-party payment system.
  • The system should integrate with third party warehouse management and distribution systems.
• Security: The system has strong security needs.
  • Personal information must remain safe, and purchases must not be compromised.
  • Transactions (e.g., purchases) must be secure. Since networked communication is vulnerable to disruption, partial transactions must be handled or prevented.
• Performance:
  • Performance must be consistent 24/7 and must handle periods in different parts of the world where purchasing may peak (e.g. in holiday periods).

Answer 1

Sequence diagram Searching Search. Database Search Page user Searched Search for products Matches the searched product Display products,

User accounts Login page Product Database USO searched poodud Search for Product by posforence - Product Present in Database

Notification system Notification Page Database product purchased saving product details. Payment Soving paymet Details Payment ---- processed

Srcesity webpage login payment Page Database I login credentials Saving login user profile Details condutialy Saving profile Details 1 Payment saving paymat Details

Tesformance System performance Performace manager nying products at any time H Chocking Availability of products Notifying the Availability updation of products H At any time I