Research And Implementation Of Visual Modeling Designer For Web Service Composition

With the deepening of Internet applications in different areas, web service has developed rapidly in terms of application integration relying on its powerful advantages of language and platform independence, protocal standardization as well as loose coupling of heterogeneous applications. However, there are also problems following with the development. Nowadays a single web service can not satisfy the needs of commercial organizations for complex business, so it has become a focus of current research that how to reuse existing web services to provide resonable composition with strong functions and quality assurance to clients. At present, a variety of web service composition languages based on business process and corresponding modeling designer have been proposed. Manual description of business process modeling is very tough, complicated and error-prone. Therefore, the research on web service composition modeling is developing more and more towards direction of visualization, that is to say, towards standardized language, graphical definition and automatic generation. Visual modeling can make users to aquire more information in a short period of time in a way that is more intuitive and easier to understand, so that the efficiency of web service composition can be greatly improved. As a result, to develop a visual modeling designer supporting web service composition modeling is now becoming an important research area.On the basis of analysis and summary of related domestic and overseas research achievements, this paper researched deeply on the visual modeling designer of web service composition. First related theories in the web service composition modeling area were briefly introduced, and current mainstream modeling systems were carefully analyzed. Then this paper researched in detail on the CCML modeling language proposed by our subject group. In order to realize standardization of CCML language, mapping rules of CCML text format to XML format are provided and a mapping example are also revealed. At last, reference to the features of current mainstream modeling system, this paper proposed the overall framework of visualized modeling designer of web service composition and designed the main function modules of this designer. Using Java language and GMF(Graphical Modeling Framework), web service composition modeling designer based on CCML modeling language has been implemented. In order to validate this designer, basic founctions of this designer were demonstrated through a case.Visual modeling designer designed and implemented in this paper can provide fine environmental support to CCML language proposed by our subject group and can also make web service composition modeling more intuitive and easier to understand. So it can improve the efficiency and quality of web service composition. Researches of this paper have important theoretical and practical application value.