MVP-based Re-engineering Method Research For Stand-alone Legacy System

With the business expansion of multinational corporations and institutions and the development of computer display and network technology, the information system for business development have higher requirements, but these companies and organizations legacy systems are often unable to adapt to new situations, need to be replacement to meet the development of business and commercial competition. On the other hand, these legacy systems have run for many years and the most closely related to core business. They cannot be changed immediately. So, a better method is to re-develop them. But how to shorten development time, reduce development costs, and object system can still release quickly, that is a difficult problem. How to adapt to the era of cloud computing and guarantee the high concurrency, high performance server is another big problem.For the problems of Stand-alone Legacy System re-engineering encountered, this paper proposes an architecture model based on MVP (Model-View-Presenter). This model adapts test-driven development and encapsulates the legacy systems'business logic. By this, you can release the object system quickly with original functions. Based on the MVP model, this paper proposes to use WCF and WPF for re-engineering of legacy systems. This paper also discusses the server and client which may run into performance and concurrency issues. Then it gives the experimental data with practice of the project. Finally, this paper also analyzed the impact for test-driven development used in re-engineering. It gives the test case specification and the test architecture for X object system, and assesses the impact to development progress with the actual project data.