Search result management system (SerumS): an approach for efficient and consistent web services brokering

The key concept of Web services is to make both interand intra-application integration possible in a way that the integration does not depend on the platform or implementation of the service customer or provider. Since the information about Web services and their providers is usually managed in a central UDDI1 registry and the present UDDI standard does not offer a mechanism for the automatic actualization of the Web service information, it is often inaccurate or outdated[1]. This work presents a concept for solving these problems. Moreover, it allows to optimize the Web service application process by adopting a Pull/Push technique and Publish/Subscribe Model based search and management system for Web services. Furthermore, the system searches proactively for new Web services and selects the appropriate service for the service customer. This improves significantly the reaction time and the performance of the Web service application process. The following main contributions build up the core of the work: • The current UDDI standard is extended by a Publish/Subscribe mechanism • Service customers can use the Publish/Subscribe mechanism to register themselves for certain Web services • Reduction of response time for service customers by automatic searching for new Web services by the service broker (in our case SerumS) • Improved correctness and completeness of the search result • Notification about new Web services and changes to the service customers through the service provider • Avoidance of inconsistent data by automatic update of the Web service information The aim of this work is to use the “Publish-Subscribe Notification for Web services”[2] specification for realizing the Publish/Subscribe mechanism, so that the result can be considered as a replacement for a UDDI registry. The proof of concept (PoC), which results from this work, has in addtion to the traditional functionalities of a UDDI registry also the features mentioned above. Universal Description Discovery and Integration