Sequence & Activity Diagrams PDF

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Sequence and Activity Diagrams The sequence and the activity diagrams were created during the OOA phase, these diagrams enable us to see how the objects interact with another. The sequence diagrams enable us to visualise and validate the scenarios. These diagrams allow us to predict how our application will behave and to discover the changes that we may need for the future systems. The document contains five diagrams, in which each important fundamental for our application is shown. Registration and login fig.4B & fig.4F – the diagram shows how a new user registers and logs in within our application. The user enters the login page, then given the option to either login or register. Once the details are entered, the verification process then takes place to check if the details are valid. If valid then the user is automatically logged in and directed to the main page. If the credentials entered do not match then user is directed towards the login failure page, the user starts the registration process again. Search function fig.4C & fig.4E – shows how the search process takes place. User is to enter (keyword e.g. red shirt), the keyword is runs through the systems algorithm. Matching the keyword with items found. Then the product result is displayed for the user to view. Add to cart fig.4D & fig.4E – shows the final step of the process. User can add the items to the shopping cart then each items price is calculated. When the user is logged in, they can view the shopping cart directly before checking out. Once order is confirmed then user receives notification from the application. The activity diagrams shown below represents the flow of our uses cases and the sequence diagrams shows the interaction between the objects and the classes.

FIGURE.4B – REGISTER & LOGIN SETUP SEQUENCE DIAGRAM

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FIGURE.4C – SEARCH FUNCTION SEQUENCE DIAGRAM

FIGURE.4D – ADD & BUY FUNCTION SEQUENCE DIAGRAM

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FIGURE.4E – BROWSE/SEARCH AND CHECKOUT ACTIVITY DIAGRAM

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FIGURE.4F – REGISTER & LOGIN ACTIVITY DIAGRAM

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