需求驱动的Web服务组合可信评估研究

发布时间：2018-12-22 09:19

【摘要】：随着计算机技术和网络技术的飞速发展,网络上发布的Web服务越来越多。但是,由于现在的互联网环境是开放的、自治的、不确定的,可能导致Web服务资源是不可靠的、错误的,甚至是恶意的,因而会影响Web服务的质量,甚至可能给用户带来安全上的隐患。而对于由Web服务组合而成的组合Web服务,同样因为运行环境的开放性和不确定性以及Web服务的不可信或者上下文改变等原因,可能导致不能满足用户的需求。因此,在这样的网络环境下,对Web服务组合进行可信评估具有重要的现实意义。本文针对Web服务及其组合可信评估的研究现状,在研究和学习Web服务及其组合相关理论的基础上,给出了一个需求驱动的Web服务组合可信评估框架,设计了基于I*框架的需求描述模型。给出了影响Web服务可信的质量属性及其度量方法,同时给出了 Web服务组合的质量属性及其度量方法。重点研究了 Web服务可信评估算法以及需求驱动的Web服务组合的可信评估算法。实现了需求驱动的Web服务组合可信评估框架的主要功能模块,包括需求解析器、具体Web服务组合生成模块、Web服务可信评估模块以及需求驱动的Web服务组合可信评估模块。最后,基于该框架给出了一个外出旅游的Web服务组合实例,通过实例模拟整个执行流程,验证了需求驱动的Web服务组合可信评估框架的可行性与有效性。
[Abstract]:With the rapid development of computer technology and network technology, more and more Web services are published on the network. However, because the current Internet environment is open, autonomous, uncertain, may lead to Web services resources are unreliable, wrong, or even malicious, which will affect the quality of Web services. It may even bring security risks to users. The composition of Web services composed of Web services may not meet the needs of users because of the openness and uncertainty of the running environment and the untrustworthy or contextual changes of Web services. Therefore, in such a network environment, it is of great practical significance to evaluate the Web service composition trusted. In this paper, according to the current research situation of Web services and its composition trusted evaluation, based on the research and study of the theory of Web services and its composition, a demand-driven framework of Web service composition trusted evaluation is proposed. A requirement description model based on I * framework is designed. In this paper, the quality attributes and their measurement methods that affect Web service trustworthiness are given, and the quality attributes and their measurement methods of Web service composition are also given. The trust evaluation algorithm of Web services and the trusted evaluation algorithm of Web service composition driven by requirement are studied in detail. The main function modules of the Web service composition trusted evaluation framework are implemented, including the requirement parser, the concrete Web service composition generation module, the Web service trusted evaluation module and the requirement driven Web service composition trusted evaluation module. Finally, an example of Web service composition based on the framework is given, and the feasibility and effectiveness of the Web service composition trusted evaluation framework driven by requirement are verified by simulating the whole execution process.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.09

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