Peer-to-peer service composition management

本提案的目标是研究点对点网络和多代理系统在管理服务组合（即使用第三方Web服务动态构建的分布式应用程序）方面的好处。这种应用程序的承诺只有在有相应的管理基础设施的情况下才能实现：-监控组件的正确组合和执行；-侦测违反服务水平协议的情况；并且-在发生故障时帮助动态更换服务。一个集中的系统来完成这些任务可能会导致一些问题，包括：产生瓶颈和单点故障，偏差的风险和缺乏适当的仪器。我们建议研究分布式基础设施来解决上述问题。然后，节点将依赖点对点网络来发现服务并评估其声誉。这项工作将以我们在Web服务组合、点对点网络、功能交互检测和信任获取方面的经验为基础。

The goal of this proposal is to investigate the benefits of peer-to-peer networks and multi-agent systems for the management of service compositions, i.e. distributed applications built dynamically with third party Web Services. The promise of such applications can only be fullfilled if there is a corresponding management infrastructure that: - monitors the correct composition and execution of the components; - detects violations of service level agreements; and - helps with the dynamic replacement of a service in case of failure. A centralized system to accomplish such tasks could lead to problems including: the creation of a bottleneck and single point of failure, the risk of bias and the lack of proper instrumentation. We propose investigating a distributed infrastructure to address the above issues. Nodes would then rely on a peer-to-peer network for the discovery of services and the evaluation of their reputation. The work will build on our experience with Web Service composition, peer-to-peer networks, feature interaction detection and trust acquisition.