Web服务事务管理关键技术研究

华中科技大学博士学位论文Web服务事务管理关键技术研究姓名：许炜申请学位级别：博士专业：信息与通信系统指导教师：杨宗凯20080521IIWebWeb1.taTHPWebtaTHP2.GDCSPGDCSP3.WebtaTHPGDCSPWebWebIIIAbstractWebServiceistheepoch-makingnewtechnologyoftheInternet.ThenextgenerationInternetisauser-oriented,service-centricandbroadintegrationenvironment.Withthebackgroundofeconomicglobalization,itcanbeachievedthroughtheWebServicetechnologythatdifferenteconomicentitiesgettheefficientandreal-timeconnectionwitheachothertorealizetheobjectofroboticizedcollaborationinthewholeindustrialchain.Withthehelpofthisnewtechnology,itisabletomeetthechallengeoftheneweraof“CollaborativeCommerce”.WebServicetransactionmanagementisakeycomponentoftheservicecomputingarchitecture.Furthermore,itisalsoanewburgeoningandinterdisciplineresearchfieldinWebService.Althoughcurrenttranditionaltransactiontechnologiesarewideusedinthefieldsofdatabaseanddistributedmanagementsystem,theycannotsatisfytherequirementoftheWebSerivceenvironment.Therearefourcharacteristicsaredifferentfromcurrenttranditionaltransactionenvironment:1.Autonomy:Thetransactionparticipantsarecomingfromdifferentinterestgroup,whichleadstotheirstrongautonomousdecisionabilities.Theseabilitiesareshownconcretelythateachresourceisunderthecompletecontrolofitsproviderinthetransactionproceeding.2.Interaction:InteractionisaremarkablecharacteristicoftheWebServicetransaction,whichcausethelongdurationanduncertaintyofthetransaction.3.Mistiness:TheabundantservicesandthecompositionsoftheWebServicetransactioncausethemistinessofitsobjectandresult.4.Selectivity:Therelationshipbetweenparticipantschangesfromobey-controltobidirectionalselection.Thus,WebServicetransactionmanagementmeetssomanychallenges.Firstly,itisharmfulforserviceprovidertoadopttheexclusivelong-termlockingpolicyintransactionproceeding.Secondly,strictatomicityrequirementcausestherollbackofwholetransactionwhileanyserviceofitisoutofstock.Finally,itisdifficulttointegratethenewtransactionmodelwiththelegacytransactionmanagementsystem.Tosolvetheseproblems,itisexploredinthemethodsofisolationandatomicityrelaxtionandtheintegrationframeworkinthisthesie.Atfirst,beingendowedwithapperceptionability,aserviceproviderisabletoparticipateorquittransactionautonomouslytoprotectitsbenefitoptimization.Secondly,IVwiththehelpofDAI(DistributedArtificialIntelligence),serviceprovidersareabletooptimizetheresourcesallocationthroughthecoordinationamongthem.Lastly,anagile,scalableandmobile-agentbasedintegrationframeworkforWebServicetransactionmanagementisproposedtosupportthetwo-phasetransactioncoordinationandthecombinationofmulti-transactionmodels.Accordingtothemethodslistedabove,severalresearchesaretakeninthisthesie.Themaincontributionsofthemarelistedasfollow:1.Itproposesatransaction-awarecoordinationprotocol,namedtaTHP,inthebackgroundofautonomoustransactionenvironment.InconsiderationofthecharacteristicsofWebServiceenvironment,theactiveparticipationabilityisfirstlyintroducedfortheresourceproviderintransactioncoordination.Theproviderisabletoevaluatethesuccessprobabilitiesofeveryresourcerequestersbythecommunicationbetweenthemandchoosethesoundonetobegranted.Simulationresultsshowthat,itcanbeconfirmedthattaTHPcanachievebetterresourceallocationinasmallscopeofcandidates.2.Itproposesagroup-decisioncoordinationprotocol,namedGDCSP,inthebackgroundofcollaborationtransactionenvironment.GDCSPisadirectcoordinationprotocolbasedontaTHP.ItfirstintroducesDAImethodsintothefieldsoftransactionmanagement.Withthehelpoftheclearobjectandmechanismofthecollaboration,theresourceproviderscanworktogethertooptimizetheresourcesallocation.ItisalsoverifiedbythesimulationthatGDCSPcanachieveoptimizationwithoutexpandingthescopeofcandidates.3.Itproposesatransactionintegrationframeworkwiththemobile-agentbasedimplementationtosatisfytherequirementofthetwophasetransactioncoordination.Thisframeworkcanalsesovletheintegrationproblemsbetweentheframeworkandthedifferenttransactionenvironmentbyusingthemobile-agenttechnology.Moreover,itcanalsereducethecommunicationcostoftaTHPandGDCSPpresentedinthisthesis.Finally,thisframeworkwithnotablecharacteristicsofexpansibilityanddifficultygivesstrongsupporttothetransactionmanagementfortheOpenWebServiceProcessManagementPlatformanditsinnovationvalueisverifiedbythepracticalapplication.Keywords:WebService,TransactionManagement,ArtificialIntelligence,DistributedConstraintSatisfactionProblem,TransactionManagementIntegrationFramework“”11.Web[1]Service-OrientedComputing,SOC[2]WebBusinesstoCustomer,B2CWebBusinesstoBusiness,B2BEnterpriseAppliactionIntegration,EAI3WebWeb1.1.1.1.1.WebRemoteProcedureCall,RPCDistributedObjectComputing,DOCCORBACommonObjectRequestBrokerArchitectureORBObjectRequestBrokerWebWTOWeb41996ITGartner2002Gartner20084060ITSOAIDC2007SOA2101201.1.2.ICDCSWeb[3,4]5[5]WebWeb(USNSF)(EuropeanCommission)(EPSRC)ARCFlowMark[6]METEO