毕业设计文献翻译面向服务架构的企业整合Word文档格式.docx

毕业设计文献翻译面向服务架构的企业整合Word文档格式.docx

《毕业设计文献翻译面向服务架构的企业整合Word文档格式.docx》由会员分享，可在线阅读，更多相关《毕业设计文献翻译面向服务架构的企业整合Word文档格式.docx（13页珍藏版）》请在冰豆网上搜索。

外文文献及译文

文献、资料题目：

Service-OrientedArchitecture

—AFieldGuidetointegrating

XMLandWebServices

文献、资料来源：

著作

文献、资料发表（出版）日期：

2004.10.22

院（部）：

专业：

班级：

姓名：

学号：

指导教师：

翻译日期：

外文文献：

Service-orientedarchitecturesforenterpriseintegration

WiththebroadacceptanceandpopularityofXMLandWebservicesasaEAIasastrategicremodelingofbusinessinfrastructureplatform,andstructure,it'

shardtosayhowtheserespectivetrendsaffectedeachotherastheyemerged.

XMLOnecouldarguethattheEAIinitiativewasrejuvenatedwiththeinfusionofenabledtechnologiesandservice-orientedarchitectures,astheintroductionofthesecomplementaryplatformsresultedinanoverhaulofEAIarchitectures.Asaresult,thequalityandsophisticationofEAIproductshasneverbeenbetter.

Ontheotherhand,themomentumbehindtheEAItrendcouldverywellhavebeenaandespeciallytoWebservices.TheincreasmajorcontributortothepopularityofXML,andespeciallytoWebservices.Theincreasingneedtoreducethecostsofintegratingdisparateenvironmentsledtotheubiquitousrequirementforastandarddatasharingplatform,independentoftiestovendorsandprovidedastandarddatatransportwhichempoweredWebexistingtechnologies.XMLserviceswiththeabilitytoeffectivelyabstractproprietaryplatformsinsupportofutilizingthistransportstandardtocommunicateoverpreviouslynon-standardboundaries.andreally,it'

snotofmuchconsequenceanymore.

XMLPerhapsbothclaimsaretrue,andWebserviceshavebecomekeyenablingtechnologieswithintheworldofEAI,andEAIproductsarebeingbuiltfromthegroundupinsupportoftheXMLandWebservicestechnologyplatforms.

1.Servicemodelsforenterpriseintegrationarchitectures

Theprocess-orientednatureofEAIsolutionshasdriventherequirementforservicemodelsthatcanexecuteandmanagevariousaspectsofenterprisebusiness.EAImiddlewareistypicallyinvolvedwiththecreationandhostingoftheseservices;

however,itisnotuncommonforcustom-developedintegrationsolutionstoprovidethesetypesofservicesindependently.Eitherway,anunderstandingoftheirrolesandunderlyingtechnologiesisvitalwhendesigninganenterpriseintegrationarchitecture.ThefollowingXWIFservicemodelsaredistinctiveofsenrice-orientedEAIenvironments.

Whencoordinatingthemessageexchangepatterninvolvedintheexecutionofabusi-nesstask,itisoftennecessarytoencapsulatetheinteractionbetweenWebservicesintoadedicatedbusinessprocess.Thisprovidesacentralsourceofbusinesslogicthatdeterminestherules,conditions,andexceptionsrelatingtotheworkflowscenariosthatcanoccurwithinasolution.Anumberofbusinessprocessdialectshaveemerged;

however,theBPEL4WSspecifi-cationhasreceivedthebroadestindustrysupport.ItiscomplementedbytheWS-CoordinationandWS-Transactionstandardstoprovideaframeworkforbuildingsophisticatedandfullymanagedbusinessworkflows.

ABPEL4WSprocessserviceexistsasaWebservicecomposedfromnumer-ouslanguageconstructsthatcanfacilitatemosttraditionalworkflowrequirements.ThedocumeiltrepresentingtheBPEL4WSprocesscontainsinterfaces（orportTypes）WSDLfortheprocessserviceitself,aswellasanyadditionalservicesinvolvedwiththeexecu-tionoftheprocess.

UnlikeregularWSDLdocuments,however,theservicedefinitionforaBPEL4WSprocessprovidesnobindinginformation.Itisintentionallyimplementation-neutralsothattheprocesscanremainmobile,reusable,andindependentfromchangestothetechnicaldeploymentenvironment.

WS-CoordinationiscloselyassociatedwiththeWS-Transactionspecification,whichdefinestwodistinctcoordinationtypes,bothofwhicharerelevanttoenterpriseintegrationenvironments.Thefirst,atomictransactions,enablesthemanagementofACIDliketransactions.TheservicemodelforatomictransactioncoordinatorsisestablishedinChapter9;

itisthemostcommontypeofcoordinationserviceusedinlegacyintegrationarchitectures.Thesecondcoordinationtypeprovidesaniodelforlongrunningtransactions,andisrepresentedaspartofthecoordinationservicemodel（forbusinessactivities）

BusinessprocessintegrationisatypicalcharacteristicofEAIsolutions,whichiswhycoordinationservicesforbusinessactivitiesareutilizedexclusivelyforthemanagementoflongrunningbusinessactivities.

Thisservicemodelisgenerallyusedinconjunctionwithprocessservicesasameansofhandlingsuccessandfailureconditionsrelatedtotheexecutionoftheoverallprocessactivity.

TheWS-Coordinationspecificationprovidesanassemblyofserviceswithpredefinedinterfacesthatsupportthemanagementofacoordinationcontext.Specifically,thiscollectionofservicesprovidesseparateoperationsforthecreationofa