레거시 시스템은 수년간 기업에서 많은 노력과 투자하여 개발되어 왔으며 현재는 기업의 중요한 자산으로 여겨지고 있다. 하지만 수많은 수정을 거치면서 시스템은 점차 비구조화 되어지고 그에 따른 문서화 작업이 제대로 이루어지지 않았으며, 과거의 중앙 집중적인 메인 프레임환경을 웹과 같은 분산 환경으로 이전하고자 하는 비즈니스 요구사항이 점차 증대되고 있다. 본 논문에서는 레거시 시스템을 컴포넌트 래핑 기술을 이용하여 엔터프라이즈 자바 빈(EJB)으로 생성하는 지원도구 개발의 일환인 레거시 컴포넌트 식별 기법을 소개한다. 제안된 식별 기법은 비즈니스 로직을 변수 분류(Variable Classification), 슬라이싱 판별 기준, 워크플로워 분석을 이용한 레거시 컴포넌트 후보를 식별하는 방법을 제시한다.
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