Research And Implementation Of JXTA-Based Web Services' Survivability Assurance Model

The P2P technology and Web services technology are the widespread distributed computing technology in the current network information system.Traditional network security technology has been unable to adapt to the new changes of network information system. The research on service survivability has become a new direction of network security studies. This article mainly aims at the research of the survivability of the web services in peer-to-peer network. The main contribution of this thesis includes follows.Firstly, by deeply researching survivability theory, P2P technology and web services technology, this thesis studys the related concept and the present research situation of the survivability theory, and analysis the advantages of the combination of the two technologies and the feasibility of construct web services'survivability assurance model in the peer-to-peer network.Secondly, this thesis designed and implemented a JXTA-based web services'survivability assurance model. The model includes routing and communication module, service search module, service publish module, service management module based on the service peer-group and service compensation mechanism based on the state of service.Thirdly, this thesis designed and implemented the service publish mechanism and the service search mechanism, which established the foundation of the implement of web services based on JXTA.Finally, the service management module based on the service peer-group and the service compensation modules based on the state of service are the core components of the system. This thesis provides the mechanism of organizing the nodes providing same web service to peer-group, which solves the problem of node management in the peer-to-peer network. The thesis also designs a service compensation mechanism based on the state of service. A node selection scheme is designed for choosing the best destination node for the service compensation. At last, the thesis analysis the advantages of the model, and validate the effect of the model in guaranting the survivability of the web services in peer-to-peer network.The achievement of this thesis may strengthen the network information system's survivability effectively. The research in the thesis is an important component of the 863 project, and is promising in the application of strengthening the survivability especially rapid recovery of web services.