Enhancing Dynamic Selection of Web Services Access Point

This paper defines the main logical functionalities and the software architecture of a framework that overcomes the limits of UDDI in fully exploiting the advantages offered by dynamic binding. The framework, relying on the services offered by remote monitoring agents, makes it possible for UDDI Registries to associate a value of convenience to different implementations of the same tModel. This value will lead Service Requestors in the choice of implementations to be contacted and invoked. UDDI Registries with this enhanced behavior still expose an interface compliant to the standard UDDI specification, thus being fully and transparently integrable in the UDDI infrastruc ture. The framework fills the gap existing between approaches to the discovery of Web Services that do not deal with any aspect of their performance and more complex solutions that guarantee a certain level of quality in providing services. This paper also describes the main design and implementation issues concerning a first open source Java prototype of the framework.