Reestruturação de software com adoção de padrões de projeto para a melhoria da manutenibilidade

Abstract

The maintainability of software is a desired requirement during the development process. Much has been said about the adoption of design standards to improve the quality of object-oriented systems. In this study, we defined the need for studies to prove efficacy of the adoption of design standards to improve the maintainability, through the analysis of measurements obtained by the application of software metrics. Was conducted a case study with a trading system in Java, which was restructured by applying design patterns to improve the quality of the code. This restructuring included the adoption of the DAO, MVC, Singleton and Factory design patterns. After the refactoring, maintainability metrics were applied to the two versions of the system, legacy and restructured in order to analyze and compare the features related to maintainability. After collecting the measures, improvements were realized in software restructured, resulting in reduced complexity, smaller size, higher level of abstraction, among others. We obtained theoretical data also indicate that the restructuring provided the best software maintainability, requiring less effort to perform maintenance resulting in lower spread of the impacts of changes. It was intended to evince from a case study that design patterns can improve the maintainability of software, and our data indicate that in the case study contributed to improved maintainability.