Investigation On Recycle Of Legacy System Based On Web

Legacy systems are that have been delivered and could be used; there are a lot of legacy systems in the current systems. As a result of the legacy systems exist technological obsolescence, the system structure of chaos, missing documents and the issue of higher maintenance costs, they are to be eliminated. Nevertheless how to make use of legacy systems to achieve software reuse, reduce the re-development costs and improve system reliability, maintainability and operational performance based on the original system has been a goal of software development. Legacy systems re-engineering in the field of software engineering has been an important research topic. In recent years, the researchers have done a lot of research on re-engineering of legacy systems and methods of the process, such as design recovery, business logic extraction, legacy systems migration, so as to legacy systems to solve the growing crisis. However, the majority of existing techniques and methods are only for specific legacy systems, it is very difficult to play out the original effect by using these methods when faced with large-scale complex operations of large legacy systems.Based on the investigation of service-oriented architecture (SOA) and Web Service in support of technical characteristics, advantages and other aspects, we adopt service-oriented legacy systems and reuse solutions. Combined with an example of large integrated logistics companies reuse legacy systems and aiming at the legacy systems existing business logic interface, we use the method of combining reverse engineering and responding to business logic to make an analysis. Based on carrying out a detailed analysis on the Web Service technology and legacy systems we try to study how to use Web Service technology to package and re-use legacy systems. Through making a comprehensive analysis on the business logic of legacy systems, we extract and recover the legacy system business logic and by these researches on business logic combined with the needs of the new system, we provide the mode of legacy system re-use. According to the results of the analysis system we design the reuse framework of the overall structure. Using JAVA technology, Web Service technology, data object persistence technology to design re-use system, carrying out the system interface layer, application service layer and legacy systems to the specific business logic of the SOAP calls WDSL and the specific business logic of Web Service packaging and other related code. We achieve the operations of calling to the existing legacy system business logic process and obtaining the results.At present, large-scale integrated logistics integrated logistics enterprise information management platform has been worked through a variety of system testing, after testing the system it met the basic demand and provided an efficient platform for shopping centers to centrally manage all kinds of information, as well as focus on providing a stable scheduling. It also enhanced the system response speed, reduced operating costs and achieved the desired results.