LAB 9 Object-oriented Modeling and Design with UML

Requirement

1. Please issue your Lab Blog on CSDN.

2. Please add the following table to your blog.

3. The Link of your blog of this lab and This Lab Sheet (This Word File) must be submitted to Moodle, or you will lose the score of this Lab. (VERY IMPORTANT: You should submit TWO things)

4. Modeling must be done using professional tools.

5. You should EXPLAIN your diagrams in words if necessary.

Question

Live-streaming sale, through some Internet platforms, is a new way of service using live-streaming technology for close commodity display, consultation response, and shopping guide. Merchants can open their own live broadcast room, or employ professional anchors to recommend goods. At present, not only many celebrities flock into this field, but some big companies’ executives are also frequently involved. Please try to design a comprehensive live-streaming sale system.

    (i) List some actors that interact with this system. Explain the relevance of each actor.

    (ii) Prepare a use case diagram for this system.

    (iii) Prepare a normal scenario for each use case. (i.e. describe each use case in words)

    (iv) Prepare sequence diagrams or activity diagrams for primary scenarios. By the way, each scenario can be described by a sequence diagram or an activity diagram, but both diagrams must be used in this question.

    (v) Prepare a class diagram for this system. Explain which principles of object-oriented are applied in your design.

    (vi) Prepare state diagrams for primary classes.

    (vii) Write the skeleton code corresponding to the class diagram in C++, Java, Python, or C#.