Research And Implementation On Re-engineering Of Legacy System Based On B/S

With the development of information construction, more and more applicationsystems become unable to meet the business requirements which need to change. Inorder to fit for the need of modern information construction, we need to modernize thelegacy systems. Service Oriented Architecture (SOA) is concerned by the businesscommunity by its advantages, such as loosely coupled, flexibility to change businessand so on. SOA becomes the best solutions of legacy systems re-engineering andsystem integration. So, this paper studies on the legacy systems re-engineeringprogram under the platform of SOA.This paper firstly introduces the basic theory based on SOA, Web Service andService Component Architecture. Then, we analyze the business requirements oflegacy system, and propose a program to realize legacy re-engineering based on a newframe, which is named SOA-SSH. Then, we use three steps to implement specificprocess of re-engineering according to the program. First, reverse-engineering toanalyze legacy system; then, package and composite services with Web Service andService Component Architecture; last, combine the system composites and SSHframework to set up a new system which is based on SOA.Finally, we deploy the new system and test it. The result verifies the program ofre-engineering of legacy system, and implements evolution of legacy system to SOAarchitecture.