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VARIABILITY MODELING TO DEVELOP FLEXIBLE SERVICE-ORIENTED APPLICATIONS.pdf
JSystSciSystEng(Jun2011)20(2):193-216 ISSN:1004—3756(Paper)1861—9576(Online
DOI:10.1007/s115l8-0l1—5164.Z CNl1—2983/N
VARIABILITY M oDELING To DEVELoPFLEXIBLE
SERVICE.oRIENTEDAPPLICATIONS
JoonseokPARK M ikyeongMOON KeunhyukYEOM
1DepartmentofComputerScienceandEngineering,PusanNationalUniversity,Busan,609.735,Korea
pjsSO@pusan.ac.kr,yeom@pusan.ac.kr(函)
2DivisionofComputerandInformationEngineering,DongseoUniversity,Busan,617-716,Korea
mkmoon@dongseo.ac.kr
Abstract
Tocopewithrequirementchangesflexiblyandrapidly,theexistingcomponent—basedparadigm is
being evolved into a service—oriented computing paradigm.The main characteristic of the
service--orientedcomputingparadigm isthatservice--orientedapplicationsaredevelopedasloosely
coupled servicesthatreflectbusinessconcerns.Thispraadigm also promotesbusinessagility,
facilitatingquickreactionstobusinesschanges.Therefore,toenhanceandsupportthebenefitsofthe
service—orientedcomputingparadimg .wemustconsiderhoW toimproveflexibiliyt andreusability
duringthedevelopmentofservice—orientedapplications.Weproposethevariabilitymodelingapproach
tospecifyandcontrolhtecommonanddistinguishingcharacteristicsofservice-orientedapplications.
Thatis,thekeyconceptsofproduct—linetechnolxIgYcanbeusedtomakeservice—orientedapplications
moreflexibleandreusable.Thispaperdescribesvariabiliyt modelingattwolevels;thecomposition
levelandthespecificationleve1.Atthecompositionlevel,wedescribethevariabiliyt ofcomposition
andtheflow ofdomainservicesthatfulfillbusinessprocesses.Atthespecificationlevel,wepresenta
domainservicethatisanabstractservicewithvariabiliyt.Theuseofoursystematicvariabiliyt
modelingapproachcangreatlyincreasetheflexibility,applicability,andreusabilityofservice—or
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