Certain investigations on the impact of model driven architecture on persistence service design

Abstract

Themottoofthisthesisistoachieve“writeoncepersistanywhere”indistributedenvironment.Distributedapplicationsdevelopmentusingmodelbasedmethodsnaturallystartswithfunctionalrequirementsgivenbytheapplication.ThemodelcapturingtheserequirementsisthenrefinedbytakingmoreaspectsoftheTechnology/Platformsintoaccount.TheModelDrivenArchitecture(MDA)hasbeenintroducedbytheObjectManagementGroup(OMG)inordertomodelsystemsindependentlyofthe(middleware)platformused.Forthis,PlatformIndependentModels(PIMs)andPlatformSpecificModels(PSMs)aredefinedinMDA.PIMsmodelasystemindependentlyofasetofpossibletargetplatformsandPSMsmodelasystemintermsofaparticularplatform.WhenthetransformationbetweenPIMsandPSMsarewellunderstood,thedevelopmentofdistributed applicationscanbecomelesscostly.InordertoadapttheMDAforsoftwaredevelopments,someobstacleslikeacceptanceofmodeling forsoftwaredevelopment,Platform/TechnologydependenceofpervasiveServicesetchavetoberemoved.Thisworkaimstopromotethepersistenceserviceofpervasiveservicecategoryfromplatformdependencytoindependentformwithautomatedroundtripengineering.ThefirstinvestigationistoformMDAbasedreverseengineeringforlegacypersistenceservicetoconstructplatformindependentpersistenceservicemodelforagivenapplicationcontext.ThesecondinvestigationistodevisetoolspecificpersistenceservicedesignusingPlatformIndependentModel,PlatformSpecificModelandmappingbetweenthem.ThethirdinvestigationisbasedontherealizationoftoolchainforMDAbasedsoftwaredevelopment.MDAcomponentsarethebestway torealizetoolinteroperabilityintoolchainwithreengineering,reverseengineeringandroundtripengineeringaspects.Thisis validatedbyaddingQoSaspectatvariouslevelsofToolchain.Thisstudyprovidesanexperimentalbackdropforthedevelopmentanddesignapproacheseachholdinglessonsforpersistenceservicedesign,itspreservationandroundtripengineering.Abstractionlevelsarenecessaryforthedesignofanypervasiveservicelikepersistenceservice.TooldependencyandpastinvestmentaretwomajordecidingfactorsinusingMDAforpersistenceservicedevelopment.Implementationofexperimentsservestovalidatetheapproachwithencouragingresults.