KIPS Transactions on Software and Data Engineering (정보처리학회논문지:소프트웨어 및 데이터공학)

Korea Information Processing Society (한국정보처리학회)
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A Feature-Oriented Method for Extracting a Product Line Asset from a Family of Legacy Applications

레거시 어플리케이션 제품군으로부터 제품라인 자산을 추출하는 휘처 기반의 방법

  • 이혜선 (한국전자통신연구원 초연결통신연구소 IoT연구본부) ;
  • 이강복 (한국전자통신연구원 초연결통신연구소 IoT연구본부)
  • Received : 2017.04.11
  • Accepted : 2017.04.29
  • Published : 2017.07.31
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Abstract

Clone-and-own reuse is an approach to creating new software variants by copying and modifying existing software products. A family of legacy software products developed by clone-and-own reuse often requires high maintenance cost and tends to be error-prone due to patch-ups without refactoring and structural degradation. To overcome these problems, many organizations that have used clone-and-own reuse now want to migrate their legacy products to software product line (SPL) for more systematic reuse and management of software asset. However, with most of existing methods, variation points are embedded directly into design and code rather than modeled and managed separately; variation points are not created ("engineered") systematically based on a variability model. This approach causes the following problems: it is difficult to understand the relationships between variation points, thus it is hard to maintain such code and the asset tends to become error-prone as it evolves. Also, when SPL evolves, design/code assets tend to be modified directly in an ad-hoc manner rather than engineered systematically with appropriate refactoring. To address these problems, we propose a feature-oriented method for extracting a SPL asset from a family of legacy applications. With the approach, we identify and model variation points and their relationships in a feature model separate from implementation, and then extract and manage a SPL asset from legacy applications based on the feature model. We have applied the method to a family of legacy Notepad++ products and demonstrated the feasibility of the method.

복제 및 소유(Clone-and-own) 재사용은 기존의 소프트웨어 제품을 복사하고 수정하여 새로운 소프트웨어를 개발하는 방법이다. 복제 및 소유 재사용으로 개발된 레거시 소프트웨어 제품군은 일반적으로 리팩토링 없이 패치 업 되고 구조적으로 저하되기 때문에 높은 유지보수 비용을 필요로 하고 오류가 발생하기 쉬운 경향이 있다. 기존에 복제 및 소유 재사용 방법을 사용했던 많은 회사들이 이러한 문제를 해결하고 소프트웨어 자산을 더 체계적으로 재사용하고 관리하기 위하여 레거시 제품들을 소프트웨어 제품라인으로 전환하려고 하고 있다. 하지만 대부분의 기존 방법들은 가변점(Variation points)을 디자인과 코드로부터 분리해서 모델링하고 관리하지 않고 디자인과 코드에 바로 임베드시킨다. 즉, 가변점이 가변성 모델을 기반으로 체계적으로 생성되고 관리되지 않는다. 이러한 기존 방법들은 다음의 문제를 야기한다. 기존 방법에서는 가변점 간 관계를 이해하기가 어렵기 때문에 가변점이 임베드 된 코드를 유지보수하기가 어렵고 코드가 변경 및 진화될 때 오류가 생기기 쉽다. 또한 소프트웨어 제품라인이 진화할 때 디자인/코드 자산이 적합한 리팩토링을 적용하여 체계적으로 변경되는 것이 아니라, 애드 혹(Ad-hoc) 방식으로 직접적으로 변경되는 경향이 있다. 본 논문에서는 이러한 문제를 해결하기 위하여 레거시 어플리케이션 제품군으로부터 소프트웨어 제품라인 자산을 구축하는 휘처 기반의 방법을 제안한다. 제안하는 방법에서는 가변점과 가변점 간 관계를 식별하고 이들을 구현으로부터 분리하여 휘처 모델로 모델링한다. 그리고 휘처 모델을 기반으로 레거시 어플리케이션으로부터 소프트웨어 제품라인 자산을 추출하고 관리한다. 제안하는 방법을 레거시 Notepad++ 제품군에 적용을 하여 방법의 실행가능성을 검증하였다.

Keywords

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