Research On Trustworthy Evaluation Of Requirement Driven Web Service Composition

With the rapid development of computer technology and network technology,more and more Web services are published on the internet.However,due to the current Internet environment is open,autonomous,and uncertain,and may lead to Web service resources are not reliable,wrong,or even malicious,and thus will affect the quality of Web service,and may even bring security risks to users.The Web service composition by Web services,because the cause of open and uncertainty of environment,Web services being not trusted or the changes of context,may cause some results that can not meet the requirements of users.Therefore,it is of great practical significance to evaluate the Web service composition in this network environment.According to the research status for credible evaluation of Web service and Web service composition,and the correlation theories of Web service and Web service composition,a framework of requirement driven Web service composition trustworthy evaluation is given,and the requirement description format based on I*framework is designed.This paper gives a method to measure the quality attributes of Web services,and gives a method to measure the quality attributes of Web service composition.This paper focuses on the trustworthy evaluation algorithm of Web service and Web service composition and implements for main functional modules of the framework.Those main functional modules are consist of the requirement parser,detailed Web service compostion sequences generating module,Web sevices trust evaluation module and demand driven Web service composition trust evaluation module.Finally,an example of travel for Web service composition based on the framework is provided,and verifies the feasibility and validity of the requirement driven Web service composition trustworthy evaluation framework by simulating the entire evaluation process of the example.