A mediation framework for Web services in a peer-to-peer environment

Summary form only given. Centralized architectures based on the client server paradigm show their limits each time the Internet extends its capabilities. They present problems in terms of security, robustness, performance, high needs for administration. Short time solutions like load balancing and replication, or purchasing of more powerful hardware tend to cope with these limits for a while, but do not provide a definitive answer to these problems. Currently, different proprietary approaches hinder attempts to enabling communication between heterogeneous systems, while the Internet is developing toward a better interoperability with service-oriented architectures. Open source and standardization efforts allow building a framework providing an original answer to interoperability and scalability over the Internet. In this paper, we consider that the distributed nature of P2P platforms allied with the standardized WS architecture, based on SOAP and WSDL represent a powerful framework for building dynamic interoperable and decentralized information systems. The aim of our work is to allow P2P participants to dynamically access and compose semantic WS outside of the P2P network, and to improve existing WS publication and discovery by using the decentralization of P2P architecture. In order to achieve this goal, we propose a mediation framework built around the JXTA P2P architecture. This framework is based on the OWL-S language as a means for a semantic description of WS interfaces, in order to solve heterogeneity problems.