Integration of UML modeling and policy-driven management of Web service systems

We address the problems that Web service management policies are not defined during Web service design and that management information collected during run-time is not directly annotated on designs to guide their improvements. We present novel mechanisms for: (1) generation of WS-Policy4MASC policies (for run-time Web service management) from the corresponding UML profiles, (2) feedback of information monitored during run-time by MASC middleware into another set of UML diagram annotations. The latter annotations show which design elements have not performed well in technical or financial metrics and service designers can use this information for design analysis and re-engineering decisions. We validated our mechanisms on prototypes using Eclipse UML tools and XSLT processing, applied to a stock trading Web service composition example.