11/08/04 1 Defect Tracking System using MVC Architecture Advisor: Dr. Wang, Chung-E Department of Computer Science California State Univ., Sacramento Presenter: Rama K Sudireddi Date: Nov. 08, 2004

11/08/04 2 Agenda Motivation Model View Controller (MVC) Architecture Defect Tracking System Legacy Defect Tracking System Defect Tracking System - MVC Advantages Difficulties Conclusion

11/08/04 3 Motivation Enterprises has to provide consistent/accurate data to different types of users (web, wireless, B2B agents, administrators) Legacy applications may embed business logic in presentation layer leading to inflexibility. Bugzilla (web interface)

11/08/04 4 MVC defined Multi tier Paradigm – Presentation logic (View) – Control logic (Controller) – Business logic (Model) Each layer can be replaced with out affecting other layers – Analogous to OSI model

11/08/04 5 MVC Architecture Controller Model View Client Request ForwardResponse

11/08/04 6 MVC Enterprise System HTML view Web customer Web Enterprise Information System WML view Swing view Wireless customer B2B Agent XML SOAP Admin Admini- strator

11/08/04 7 Defect Tracking System Provides individuals to request services related to software and hardware products. Ability to track the progress of their requests for bug fixes, enhancements, metric reports or new projects. Management insight into the work load and progress of their projects as ability to assign priority.

11/08/04 8 Legacy Defect Tracking System Single tier Architecture Inflexible Hard to maintain Suffer Scalability

11/08/04 9 Defect Tracking System - MVC DB Servlet BeansJSP HTML Submit View Controller Model Request Forward Response

11/08/04 10 Advantages More Scalable Enhances Reliability Enable Reusability Greater Flexibility Easy to Extend Clarity of design Ease of Maintenance Best use of different skill sets

11/08/04 11 Difficulties More files to manage Significant planning Over kill for small applications

11/08/04 12 Conclusion MVC architecture provides a best approach for the development of enterprise applications Taking the time to lay down the MVC architecture is worth the payoff

11/08/04 13 Questions ?