From Legacy to Web through Interaction Modeling

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ICSM '02 Proceedings of the International Conference on Software Maintenance (ICSM'02)
Year:
2002

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Abstract

In the context of the CelLEST project, we have beeninvestigating the problem of reengineering and reusingthe services provided by legacy applications, running onmainframe hosts. This work has resulted in a suite ofmethods, based on understanding and modeling the users'interaction with the legacy-application interface. Thesemethods aim at (a) modeling the behavior of the legacyuser interface as a state-transition diagram, (b)recovering specifications for the application's functionsby discovering the users' tasks as frequently occurringinteraction patterns, and (c) constructing new user-interfacefront-ends to make the recovered legacyfunctions accessible through the Web. In this paper, wedescribe the overall process for legacy migration to theWorld Wide Web, using the CelLEST methods, and weillustrate it with an example case study.