| Legacy software is almost designed before object-oriented development was widely used in industry, and has been deeply incorporated in business operation. In order to save resources, fully utilize the existing achievement, it is inevitable to reuse legacy code.LC-XML method is proposed in the thesis to realize the sharing of legacy code information, which wraps legacy code into fhfml code by using XML that make it accessible to the users. Then, the users don't need to analyze tedious legacy code, and they can get source code information only in the fhfml code.Mostly, businesses concerned not only the legacy code itself but also the reusing function of legacy code as to realize the sharing service. Because most of the legacy code are only designed for centralized computing platform, and they can not be reused directly in current distributed computing platform. Considering the requirement above, we propose the method of LC-GS to convert legacy code into service which is reachable to the users. Thus, reusing the function of legacy code can be realized.LC-XML and LC-GS are based on Loglo system which has been developed on Web Services. Having introduced the Loglo System, the thesis discussed the framework and key techniques in detail to explain how we implement the reusage of legacy code by the methods. And put forward the design and development step of the two methods in Loglo system. The test done by our research team has proved that LC-XML and LC-GS can implement the reusage of legacy code. |
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