基于sca的轻量级bpel引擎的设计与实现

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1、AbstractSOAisbecomingamoreandmoreimportantconceptofsoftwareengineeringarea，whichwillbecomethedirectionandreferenceforsoftwareengineeringprocedure．However,howtousetheconceptofSOAinsoftwareengineeringinanormativewayhasbeenafocusedquestionforalongtime．Therearesomefunctionscomingoutduringth

2、eseyearstOuseSOA，includingBPELandSCA，whicharetwoimportantfunctionsinthisarea．BusinessProcessExecutionLanguage(BPEL)isanXML—basedlanguageforcreatingaworkflowprocess，whichbecameanimportantwaytoimplementtheconceptofSOAsincebeingbroughtforward．BPELgivesoutanewideatoreuseandreorganizetheexis

3、tingsystemswhichwereproducedbasedondifferentarchitecturesanddifferentlanguages．BPELwascreatedspeciallytoarrangeWebServicesforanewworkflow,whichcouldeffectivelyimprovethereusabilityoftheexistingsystems．ServiceComponentArchitecture(SCA)isaproposedstandardforcomposinganddeployingSOA．WhenSC

4、A-compliantproductsareinplaceatdevelopmentandruntime，onecouldwritecodeintheimplementationlanguageofanychoice，butwithanimportantdifferencethanthefocusisonbusinesslogicbutnotlanguageanymore．SCAallowstoavoidingwritingmanyofthetechnology—specificdetails，especiallythetransferprotoc01．Basedon

5、theintroductionsandadvantagesofBPELandSCA，thisarticlegivesoutanewdesignofaSCA—basedlightweightBPELengine．ThisarticlefirstlyintroducestherelationshipbetweenBPELandBPELengine，andthedesigndirectionofthelightweightengine．Andthenspeciallydesignsandanalysesthearchitectureofthelightweightengin

6、e，alsointroducestheessentialoftheconceptoflightweight．Basedonthedesignofarchitecture，thisarticleintroducesthefunctiondesignforeverymoduleoftheengineindetailwithsomediagramsandcorecodes．Atlast，thisarticleintroducesoneexampletousetheSCA-basedlightweightBPELengineinahospitalsystem．Thisarti

7、clegivesoutanideatobindBPELenginetogetherwithSCAinanewway,whichmeansadoptingthewaythatSCAcomposinganddeployingSOAasreferenceinthedesignofthelightweightBPELengine．Besidesthat，thisarticlealsogivesoutadelaminationmodelforBPEL，whichcouldbeusedformappingtheIIl北京工业大学丁学硕十学位论文elementes