성능기반 리팩토링 기법 연구: 무브 메소드 영역 추출 및 식별 = Performance-based Refactoring: Identifying & Extracting Move-method Region

다국어 초록 (Multilingual Abstract)

As software is getting more complicated and bigger, a variety of studies to improve software structure has been studied, which can reduce complexity of object-oriented systems and improve readability, structure, performance, maintenance, abstractness. Refactoring can be one of the those studies and has been widely used. Refactoring is a disciplined technique for restructuring an existing body of code without changing its external behavior which follows the high cohesion, low coupling principle in OOP. In this paper, it is proposed to improve performance by enhance memory usage based on Java garbage collector. And refactoring technique which identify move method region and extracting it, is demonstrated.

국문 초록 (Abstract)

소프트웨어가 복잡해지고 대형화됨에 따라 다양한 소프트웨어 구조개선 방법이 연구되고 있으며, 특히 객체지향 시스템에서의 복잡도를 낮추고 가독성, 구조, 성능, 유지보수, 추상성 등을 향상시킬 수 있는 리팩토링(Refactoring) 기법이 활용되고 있다. 리팩토링은 객체지향 방법론에서 사용되는 높은 응집도와 낮은 결합도 원칙에 따라 기존의 소프트웨어를 결과에 변화 없이 구조 개선을 제시하였다. 본 연구에서는 자바의 GC(Gabage Collection)를 중심으로 메모리관리에 따른 성능향상 방법을 제시하고, 각 객체와 메모리 관계를 주요 팩터로 하여 무브메소드를 선정하고 리팩토링을 시도하는 방법을 제안한다.

참고문헌 (Reference)

1 정영애, "클래스 간 메소드 위치 결정 방법의 비교" 한국콘텐츠학회 6 (6): 80-88, 2006

2 Wim De Pauw., "Visualizing reference patterns for solving memory leaks in Java" 1999

3 Martin Fowler, "Refactoring Improving the Desinge of Existing Code" Addision Wesley 1999

4 Yoshiki Higo., "Refactoring Effect Estimation based on Complexity Metrics" 2008

5 W. G. Griswold, "Program Restructuring as an Aid to Software Maintenance" University of Washington 2009

6 Roger S., "Pressman, Software Engineerignn A Practitioners Approach, Fourth Edition" McGraw-Hill 1997

7 Li, W., "Object Oriented Metrics that predict Maintainability" 23 (23): 111-122, 1993

8 Frank Simon., "Metrics Based Refactoring" 2001

9 Lee, Y., "Measuring the Coupling and Cohesion of an Object-Oriented Program Based on Information Flow" 1997

10 Min Zhang., "Improving the precision of Fowler’s Definitions of Bad Smells" 2009

11 Nikolaos Tsantalis, "Identification of Move Method Refactoring Opportunites" 35 (35): 2009

12 Ruchika Malhotra, "Empirical Study of Object- Oriented Metrics" Chair of Software Engineering 2006

13 Briand, L., "An Investigation into Coupling Measures for C++" 412-421, 1997

14 Chidamber, S., "A Metrics Suite for Object Oriented Design" 20 (20): 476-493, 1994

15 Bindu and Mehra, "A Critique of Cohesion Mea-sures in the Object-Oriented paradigm" Michigan Technologial university 1997