A Scenario-Driven Research Of Integrating Web Services

Web Services provides an interactive mechanism for isomerous, autonomous and loosely-coupled distributed applications, and has become a new application pattern and distributed computing model. To satisfy more complex and powerful function for actual application, dynamically integrating Web Services according with requirements was born.Web Services integration according with requirements means two aspects. On one hand, it is how to describe customer?s requirements conveniently and precisely. On the other hand, it is how to choose and integrate appropriate Web Services to satisfy and solve customer?s requirements.To the first problem, this paper proposed a Scenario-Driven method of constructing business model named SDMC, which takes pictorial language UCM as representation language. It sets out initial requirement, and then realizes the integration of explicit requirement and the experts? knowledge efficiently. In the process of the approach, the customization scenario is created and refined in interactive fashion with the support of design patterns, plug and ontology library, constructing and refining workflow step by step until forming business model with complete content and excellent structure and providing basis for integrating services and harmonizing tasks. This method emphasizes on the efficient integration of explicit requirement and the experts? knowledge.To the second,this paper puts forward a new mechanism of integrating Web Services. At first, it is picking-up semantic information of customer?s requirements from business model, then finding corresponding service according to the service discovery algorithm of the first screening and the rear matching, finally realizing Web Services integration through Services calling under process engine.In order to verify the practicality and validity of SDMC method, the paper realized a simple electronic shopping system. The process of customer directly participating and driving, has realized the Services application with individuality requirements.