Technology Research, Based On The Components Of The J2ee Enterprise Component Framework Assembly

The software component technology is a discipline branch which expands rapidly in recent years and receives widespread attention. The software components must be assembled before they form the application system. The component assembly enables the software technician to construct software system by integrating components; therefore the component assembly technique plays a key role in the development of component software. Framework based on components provides unified solution to similar questions in a certain field, and basis and environment for the assembly of components. The ultimate goal of component framework is to dynamically assemble components, realizing the plug-and-play of components. The software development on the basis of framework and components has become an inevitable trend in software engineering and the industrialized production. And the assembly of frame members is the crucial stage in the frame member reusing process. At present the assembly of frame members is mainly completed by users manually, so how to improve the level of automation in the frame member assembly process is also worth studying.This thesis first conducts the analytical study on the component technology and the component assembly technique. In view of the drawbacks of object-oriented framework, a component-based framework is proposed, a software framework composed by a group of mutually cooperating components. Taking framework expansion spot as the starting point of my research, I propose that the component framework be expanded on the basis of by role expansion shape. The thesis is trying to establish a distributional application framework on the foundation of component technology. With the application of design pattern, the enterprise component framework based on the J2EE has been carried out, the framework, together with its frame members and the component assembly, being formally described with formalized language. In the instantiation process of J2EE enterprise component framework, the role expansion shape is adopted to the design of role component, in order to assemble the applied components outside the component framework and realize the expansion of component framework. Finally the application of PLM system being treated as a specific research area, the component assembly technique based on the J2EE enterprise component framework is integrated into the PLM supply chain management system. The components are analyzed, designed and realized with the case study of the development of subsystem for voucher management in sales management. Moreover, the corresponding applied components are assembled with the role expansion shape based on J2EE enterprise component framework, realizing the subsystem function of the voucher management.It has been proved by practice that the frame-based component assembly technique is effective in improving the development efficiency of system, as well as the extensibility and reusability. Meanwhile, it has certain theoretical significance and practical value for further study on frame-based automatic component assembly.