Research On Web Service Composition Based On Agent In P2P Environment

Web Service is a criterion for application communication which is based on existing internet criterion, it is platform-independent and can accomplish compactness operations on applications or application components which are in different platform. Web Services are published by more and more providers, single Web Service is more and more difficult to satisfy actual requirement. The application need to composite many different Web Services which have their own business functions according to certain logical process for satisfying complicated business requirement. The release, discovery and composition of traditional Web Services are based on UDDI, it has some limitations in function and semantic supporting which restrict the agility of release, discovery and composition of Web Service. With the increasing number of service, service release and searching are frequenter than before which makes the limitation of UDDI more and more outstanding. P2P is increasingly receiving attention in research because of its distributed capability, expansibility and load equilibrium.This thesis has deeply researched the Web Service composition technology in P2P environment on the background of Web Service technology. It has carried out a new form of service denotation in P2P environment which is based on Chord Algorithm. designed the general node P2P system and the semantic super node P2P system and introduced the methods of resources release and searching which are based on semantic. It gives the multi-agent model. the interaction process between agents and the process of Web Service composition. Introducing the Agent technology into service composition, we set up the Web Service composition model in P2P environment which is based on Agent. It makes the Web Service get the extensive semantic supporting. Towards the Web Service composition process, this thesis gives the service matching strategy, service composition algorithm and selection strategy of optimal service composition. With the cooperation of different agent. the model accomplishes service matching. composition. execution and rerelease. makes the dynamic running of Web Service composition flow come true.