웹 중심의 인터넷 환경은 개인의 정보 처리 뿐 아니라 기업간의 업무 전개를 위한 핵심 기술로 발전해 나가고 있다. 하지만, 조직의 중요한 지식과 프로세스들을 처리하는 시스템들은 대부분 과거(Legacy)의 기술에 의해 개발되어졌으며, 이러한 시스템들은 웹 환경을 위한 분산 아키텍쳐의 결여와 개방성과 표준화 미흡으로 시스템의 유지보수에 많은 어려움을 가진다. 따라서 재사용성이 높은 레가시 시스템들을 현대적인 기술 요구를 수용하여 향상된 비즈니스 처리가 가능한 새로운 시스템으로 재공학함은 필수적인 일로 여겨진다. 따라서 본 논문에서는 COBOL 레가시 프로그램을 대상으로 컴포넌트 랩핑을 위한 설계 패턴의 적용을 통해 컴포넌트 환경으로의 재공학 방법을 제시한다. 이를 위해 COBOL 프로그램에서 비즈니스 로직 추출을 위한 절차와 방법을 설명하고, 그 결과 생성된 클래스들을 패키징하고 랩핑하기 위해 보편적인 양식으로 이용할 수 있는 재공학 설계 패턴을 나열하고 실 예에 Facade 패턴을 적용한다.
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