Using Design Pattern for Micro Level Software Design

Several problems can arise while developing an interactive or web based systems containing mixture of data access, business logic, and presentation code. Such applications are difficult to maintain, because interdependencies between all of the components cause strong ripple effects whenever a change is made anywhere. High coupling makes classes difficult or impossible to reuse because they depend on so many other classes. While developing such system, one should think beyond traditional, structured or object oriented methods as they offer limited means of reasoning about the validity of specifications. Finding the right abstractions of classes and defining the collaboration between them will be easier if design pattern is integrated with object oriented method of software engineering. With the help of pattern a system can be designed for change. Even though the use of a design pattern increases the reusability of the software, it is not practiced to its strength, largely because of the unfamiliarity of the benefits a design pattern offers. The present paper demonstrates how an interactive or web based system( including Web2.0) can be developed with the help of a well accepted design pattern, Model-View-Controller (MVC), that has been used in popular frameworks like Java Swing, Struts, spring and .Net.