网络计算环境中的协调技术研究

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1、上海交通大学博士学位论文网络计算环境中的协调技术研究姓名：夏顺东申请学位级别：博士专业：计算机软件与理论指导教师：尤晋元20030301上海交通大学博士论文网络计算环境中的协调技术研究AbstractAbstractNetworkcomputingisanewcomputingparadigmemergingwiththerapiddevelopmentofnetworkinfrastructure,especiallyInternet.Networkcomputingenvironments(NCEs)ca

2、nbeenvisionedascollectionsofinteractiveandcooperativecomputingcomponents,suchasprograms,tools,clients,andintelligentagents.Currentlythereisalackofefficientmethodologyandtechnologytosupportthesecomputingcomponentstointeractandcooperate.Soitiscomplextodevelop

3、andmaintainapplicationsinNCEs.Itisalsoafactortomakethenetworkapplicationslagbehindthedevelopmentofnetworkinfrastructure.Incomputerscience,coordinationtechnologyisanimportantresearchareainrecentyears,andisinitiallyappliedtolargedistributed/parallelsystems.It

4、isapromisingtechnologytosolvetheproblemofinteractionandcooperationinNCEs.Data-drivencoordinationtechnology,abranchofcoordinationtechnology,providesacommunicationmechanismforcomputingcomponentsthroughashareddataspace,wherethecommunicationinformationisindepen

5、dentoftheactivityhistoryofcomputingcomponents.Thenthecomputingcomponentsneednotbespatiallycoupledortemporallycoupled.Sodata-drivencoordinationtechnologyispotentiallysuitableforNCEs.However,therearealotofproblemsfordada-driventechnologytobeappliedtoNCEs:Thec

6、oordinationlanguageistoosimple;Forlackofsecuritymechanism,theactivityofcomputingcomponentsincoordinationmediaisnotcontrolled;Thereisalackofformalbasis;Thesharedataspaceisnotscalable;Thereisalackofmechanismtoprovidetrustworthycoordination.Tosolvetheseproblem

7、s,thisdissertationproposedabetterdata-drivencoordinationtechnologyforNCEs–SIKA(SecureInterlinKArchitecture).Ididfollowingresearchworkinthisdissertation:lProposingSIKAcoordinationmodelandlanguage.SIKAcoordinationmodel,basedonshareddataspace,isenhancedbysecur

8、itymechanismanddatatransformationmechanism.Thesecuritymechanismisusedtoenforcethecoordinationpolicyincoordinationprocess.Thedatatransformationmechanismisbasedonchemicalabstractmachineandisusedtomakethe