| As a new open distributed technology, Web Services has the characteristic of high interoperation that can compose new systems easily by integrating existing ones. With web services applied widely, the dynamic interaction and integration of web services has been the biggest concern of the software technology research area.Current technology of web services integration has many limitations, such that can't integrate Web services dynamically. From the standpoint of basic Web Services architecture, web services integration is a business process of combining discovery, selection and invocation. With the background of web services application, this paper focuses on some key technologies of web services integration and proposes a Agent-based web services integration model (AWSIF). Following efforts are presented in this dissertation:(1) An enhanced Web Services discovery engine-UDDIxAn enhanced Web Services discovery engine (UDDIx) is proposed to extend UDDI in this research. Based on dynamic parsing of WSDL documentation, UDDIx promotes web services discovery level of UDDI from document to interface, and improves web services searching by optimizing searching strategies. Meanwhile, it improves the efficiency of atomic web services matching via refined interface matching algorithm. Using refined backward chaining algorithm, which is in the manner of composing web services, UDDIx enhances the Web Services discovery capability of UDDI.(2) QoS forum based personalized Web Services selectionBased on UDDIx, this research selects web services quality attributes from the perspective of consumers and constructs a central QoS forum of web services. Agents share web services quality information through QoS forum. According to consumer policies, consumer preferences and the reputation of web service, agents select the best web services by fuzzy reasoning.(3) Agent Conversation -based Web Services invocation... |
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