Discovering web services and JXTA peer-to-peer services in a unified manner

Abstract. Web services constitute the most prevailing instantiation of the service-oriented computing paradigm. Recently however, representatives of other computing technologies, such as peer-to-peer (p2p), have also adopted the service-oriented approach and expose functionality as services. Thus the service-oriented community could be greatly assisted, if these heterogeneous services were integrated and composed. A key towards achieving this integration is the establishment of a unified approach in service discovery. In this paper, we describe some features of a unified service query language and focus on its associated engine, which is used to discover web and p2p services in a unified manner. We exemplify how our unified approach is applied in the case of web and p2p service discovery in UDDI and JXTA, respectively. Additionally, we demonstrate how our service search engine is able to process heterogeneous service advertisements and thus to exploit the advertised syntactic, semantic, and quality-of-service properties during matchmaking.