基于可信计算的Web服务调用关键路径研究.pdf

230 2016，52(3) ComputerEngineeringandApplications计算机工程与应用 基于可信计算的Web服务调用关键路径研究 马 亮，钱雪忠 MALiang，QIANXuezhong 江南大学 物联网工程学院 ，江苏 无锡 214122 SchoolofInternetofThingsEngineering，JiangnanUniversity，W uxi，Jiangsu214122，China MALiang，QIANXuezhong．ResearchoncriticalpathofWebservicecallbasedontrustedcomputing．Computer EngineeringandApplications,2016。52(3)：230—235． Abstract：W iththelargegrowthinnumberofW eb servicesandthedemandforregistries，thereisagrowingresponse time—spendingoncompletingaWebservicecallofSAP(SystemsApplicationsandProductsindataprocessing)enterprise system，andsomeoftheseW eb servicesareuntrusted．Itseriouslyhinderstheefficiencyandqualityofservice’srequest． Thispaperintroducesthetrustedcomputing，namelytheconceptofintegrity．Itcombinescriticalpathinengineering，pro— posesadeterminealgorithm ofcriticalpathofaW ebservicecallbasedon integrityalgorithm innovatively．FortheW eb servicesthatmeettherequester’sdemandregisteredintheUDDI(UniversalDescription，DiscoveryandIntegration)，it usesintegrityalgorithm tocalculatethem ，excludespartoftheW ebservicesofwhichintegrityvaluesarebelow requester’s expectations；itputstheprocessofatrustedWebservicecallabstractedintoAOE(ActivityOnEdge)networkdiagram representedbyweighteddirectedacyclicgraph，findsacriticalpathofaWebservicecallinthegraphbymeansofcritical pathdeterminealgorithm．Servicesonthecriticalpathareallcriticalservices．ByusingtheSAPsystem clientbufferman- agement，businessagentsandotherdesignpatterns，itreducesthecalltimeofcriticalservicestoimprovetheefficiencyof thecriticalpath，shortensservicecallresponsecycle，furtherimprovestheoverallefficiencyandqualityofservicecalls．It developsthepracticalsystem toverify thefeasibility and effectivenessofthealgorithm．Thesystem hasbeenurn in a group．Itreducesenteprrise’soperatingcosts，improvesworkefficiency，andispraisedbytheusersatisfaction． Keywords：Webservice；SystemsApplicationsandProductsindataprocessing(SAP)system；trustedcomputing；integ— rity；critica1path；