1. ImplementationModel

2. Sources
•IvarJacobson,GradyBooch,JamesRumbaugh.TheUnifiedSoftwareDevelopmentProcess(ObjectTechnologySeries)-1998.
•AhmadK.Shuja,JochenKrebs.IBMRationalUnifiedProcessReferenceandCertificationGuide—SolutionDesigner.IBMPress,2008.
•McConnell.,Steve.CodeCompleteSecondEdition-Apracticalhandbookofsoftwareconstruction.MicrosoftPress.2009
•Sommerville,Ian.SoftwareEngineeringNinthEdition. Pearson,2011.

3. •ImplementationModel
•ImportantConcepts
•Integration

4. Before..
Cartoon: NP
Designersand developersdon'treallyspeakthesamelanguage.
(From: http://chetchat.blogspot.fr/2014/08/cartoon-np.html)

5. Somewordsenvolved
•Implementation
•Construction?
•Coding?
Codingimplythemechanicaltranslationofapreexistingdesignintoacomputerlanguage;
Implementation(SWconstruction)isnotatallmechanicalandinvolvessubstantialcreativityandjudgment.
Steve McConnell
lead for the Construction Knowledge Area of the Software Engineering Body of Knowledge (SWEBOK) project.

6. Implementationisvital
Implementationisthecentralactivityinsoftwaredevelopment.Requirementsandarchitecturearedonebeforeconstructionsothatyoucandoconstructioneffectively.Systemtesting(inthestrictsenseofindependenttesting) isdoneafterconstructiontoverifythatconstructionhasbeendonecorrectly. Constructionisatthecenterofthesoftware- developmentprocess.
Steve McConnell

7. Implementationisvital
Constructionistheonlyactivitythat'sguaranteedtobedone.Theidealsoftwareprojectgoesthroughcarefulrequirementsdevelopmentandarchitecturaldesignbeforeconstructionbegins.Theidealprojectundergoescomprehensive,statisticallycontrolledsystemtestingafterconstruction.Imperfect,real-worldprojects,however,oftenskiprequirementsanddesigntojumpintoconstruction.Theydroptestingbecausetheyhavetoomanyerrorstofixandthey'verunoutoftime.Butnomatterhowrushedorpoorlyplannedaprojectis,youcan'tdropconstruction;it'swheretherubbermeetstheroad.Improvingconstructionisthusawayofimprovinganysoftware-developmenteffort,nomatterhowabbreviated.
Steve McConnell

8. ImplementationModel
•TheImplementationmodeldescribeshowdesignmodel’selementsareimplementedintermsofcomponents.
•Italsodescribeshowcomponentsareorganizedaccordingtostructurationandmodularizationapproachesavailableintheenvironmentolanguage.
•Itimpliesdependence

9. ImplementationModel
From: "The Unified Software Development Process (Object Technology Series)“-1998

10. More in deep…
TheImplementationexplainshowtodevelop, organize,unittest,andintegratethecomponentsastheyareincrementallydevelopedineveryiteration.Testingduringimplementationislimitedtounittesting.Othertests,suchasthesystemtestandtheintegrationtest,arecarriedoutwithintheTest.

11. More in deep…
Sommervilleintroducessomeaspectsofimplementationthatareparticularlyimportanttosoftwareengineeringthatareoftennotcoveredinprogrammingtexts
1.Reuse.Mostmodernsoftwareisconstructedbyreusingexistingcomponentsorsystems.Whenyouaredevelopingsoftware,youshouldmakeasmuchuseaspossibleofexistingcode.
2.Configurationmanagement.Duringthedevelopmentprocess,manydifferentversionsofeachsoftwarecomponentarecreated.Ifyoudon’tkeeptrackoftheseversionsinaconfigurationmanagementsystem,youareliabletoincludethewrongversionsofthesecomponentsinyoursystem.
3.Host-targetdevelopment.Productionsoftwaredoesnotusuallyexecuteonthesamecomputerasthesoftwaredevelopmentenvironment.Rather,youdevelopitononecomputer(thehostsystem)andexecuteitonaseparatecomputer(thetargetsystem).Thehostandtargetsystemsaresometimesofthesametypebut,oftentheyarecompletelydifferent.

12. Aboutreuse
Softwarereuseispossibleatanumberofdifferentlevels:
1. The abstraction level.
2. The object level
3. The component level
4. The system level

13. •Todefinetheorganizationofthecodeintermsofimplementationsubsystems(maybeorganizedinlayers)
•Toimplementthedesignelementsintermsofimplementationelements(sourcefiles,binaries, executableprograms,andothers)
•Totestthedevelopedcomponentsasunits
•Tointegratetheresultsproducedbyindividualimplementers(orteams)intoanexecutablesystem
Purposes

14. •Verifyingthatthegroundworkhasbeenlaidsothatconstructioncanproceedsuccessfully
•Determininghowyourcodewillbetested
•Designingandwritingclassesandroutines
•Creatingandnamingvariablesandnamedconstants
•Selectingcontrolstructuresandorganizingblocksofstatements
•Unittesting,integrationtesting,anddebuggingyourowncode
•Reviewingotherteammembers'low-leveldesignsandcodeandhavingthemreviewyours
•Polishingcodebycarefullyformattingandcommentingit
•Integratingsoftwarecomponentsthatwerecreatedseparately
•Tuningcodetomakeitfasterandusefewerresources
Specifictasksinvolved
Steve McConnell

15. •TheImplementationModelisacollectionofcomponentsandtheimplementationsubsystemsthatcontainthem.
•Thetermmodelhereisnotmeanttoconnotediagramsandothermoreabstractrepresentations.Instead,anImplementationModelconsistsofImplementationElements,ImplementationSubsystems,andelementscreatedtosupportdevelopertesting.
ImplementationModel

16. Workersinvolvedin theImplementationModel

17. •TheSoftwareArchitectisresponsibleforstructuringtheImplementationModel.
•StructuringtheImplementationModelinvolvesestablishingtheImplementationModelstructure,adjustingimplementationsubsystems,definingimportsforeachimplementationsubsystem,decidinghowtotreatexecutableprogramsandotherderivedobjects,decidinghowtotreattestassets,updatingtheimplementationview, andevaluatingtheImplementationModel
ImplementationModel

18. ImplementationModel

19. Workersinvolvedin theImplementationModel

20. So…

21. •Implementdesignelements—TheImplementerimplementstheelementsinthedesignmodel;thatis,hewritessourcecode, adaptsexistingsourcecode,compiles,andlinksandperformsunittests.Ifhediscoversdefectsinthedesign,hesubmitsreworkfeedbackonthedesign.
•Fixcodedefects—TheImplementeralsofixescodedefectsidentifiedduringtheunittestsandperformsfurtherunittestingtoensurethatnonewdefectshaveemergedandthatthechangeisverified.
•Evaluatequality—Finally,theImplementerreviewsthecodetoevaluatequalityandcompliancewiththeProgrammingGuidelines.
ImplementationModelconsiderate!!

22. TheImplementerisresponsibleforthefollowing:
•Implementingdesignelements-Thisinvolvespreparingforimplementation,transformingthedesigntoimplementation,completingtheimplementation,evaluatingtheimplementation,andprovidingfeedbacktodesign.Inimplementingthedesignelements,theImplementerproducesanImplementationElementandImplementationSubsystem
ImplementComponents

23. TheImplementerisresponsibleforthefollowing:
•Analyzingruntimebehavior—Thisisdonebydeterminingtherequiredexecutionscenario,preparingimplementationcomponentsforruntimeobservation, preparingtheenvironmentforexecution,executingthecomponentandcapturingbehavioralobservations, reviewingbehavioralobservationsandisolatinginitialfindings,analyzingfindingstounderstandrootcauses, identifyingandcommunicatingfollow-upactivities,andevaluatingtheresults
ImplementComponents

24. TheImplementerisresponsibleforthefollowing:
•ImplementingtestabilityelementsandproducingtheTestabilityElementandtheTestStub—Thisinvolvesimplementingandunittestingdrives/stubsandimplementingandunittestingtheinterfacetotheautomatedtesttool(UnitFramework,TestNG…).
ImplementComponents

25. TheImplementerisresponsibleforthefollowing:
•ImplementingandproducingtheDeveloperTest—Thisisachievedbyrefiningthescopeandidentifyingthetests,selectingtheappropriateimplementationtechniques,implementingthetest, establishingexternaldatasets,verifyingthetestimplementation, andmaintainingtraceabilityrelationships.
•ExecutingdevelopertestsandproducingtheTestLog—Thisrequiresexecutingtheunittests,evaluatingtheexecutionoftests, verifyingthetestresults,andrecoveringfromhaltedtests.
ImplementComponents

26. So…

27. So…

28. So…

29. Integration
Largesoftwaresystemsrequiremultiplesoftwarecomponents,someofftheshelfandotherscustomdeveloped,tobeintegratedintoawholesystem.Thisisaspecializedsoftwaredevelopmentactivitythatcombinesseparatesoftwarecomponentstoproduceasoftwaresystem.
ImportantConcepts

30. Integrationisdoneatseveralstagesandlevelsduringtheimplementation.
-Integratingtheworkofateamworkinginthesameimplementationsubsystembeforereleasingthesubsystemtosystemintegrators
-Integratingsubsystemsintoacompletesystem.
Integration

31. Incrementalintegrationmeansthatcodeiswrittenandtestedinsmallpiecesandthencombinedintoaworkingwholebyaddingonepieceatatime. Thebenefitsincludeeasyidentificationoffaults, fulltestingofcomponents,andearlyfeedbackontheexecutionofthesystem.
Integration

32. So…

33. ImportantConcepts
Prototypes
Prototypesareusedtocheckbusinessviability,todemonstratekeytechnology,toobtainprojectcommitmentorfunding,tofurtherunderstandrequirements,andtocheckusability

34. ImportantConcepts
RuntimeObservationand Analysis
Thisconceptencompassestheobservationofthesoftwareduringruntimeexecutionandanalysisofthecapturedannotationswherepathsaretracedthroughsoftwarecomponentsandthenaggregatedtounderstandglobalsystembehaviorviastatisticalinference.

35. ImportantConcepts
RuntimeObservationand Analysis
Becauseofthepotentialvolumeofthelow-levelinformationthatcanbecapturedfromruntimebehavior,thespeedatwhichthatinformationisgenerated,andthesubsequentdifficultyinunderstandingthepotentiallyvastamountofinformation,automatedtoolsupportisakeyfactorinmakingthispracticefeasible.

36. ABuildisanoperationalversionofasystemorapartofthesystemthatdemonstratesasubsetofthecapabilitiesprovidedinthefinalproduct.TheBuildconstitutesanintegralpartoftheiterativedevelopmentlifecycleandprovidesreviewpoints.Notethatinalliterativeincrementaldevelopmentprocesses,progressisdemonstratedviaanexecutable,a(working)softwaredeliverableratherthanjustdocumentsorthelike.Thelifecycle“providesreviewpoints,”buttheBuildisreviewableandobjectivelydemonstratesprogresstowardcompletion.TheBuildisexaminedatthereviewpointsthatthelifecycleprovides.
Build

37. Build
ThepurposeofaBuild,constructedfromotherelementsintheimplementation,istodeliveratestablesubsetoftheruntimefunctionsandcapabilitiesofthesystem.

38. IntegrationBuildPlan
Thisartifactprovidesadetailedplanforintegrationwithinaniteration.Thepurposeofthisartifactistodefinetheorderinwhichtoimplementthecomponents,determinewhichbuildstocreatewhenintegratingthesystem,anddefinehowtheyaretobeassessed.TheImplementerusesthisartifacttoplantheorderinwhichtoimplementdesignelementsandwhatandwhentodelivertosystemintegration.

39. IntegrationBuildPlan
-Integratorleadstheplanningandexecutionofimplementationelementintegrationtoproducebuilds.
-TheIntegratorusestheintegrationbuildplanasaplanningtool

40. DeveloperTest
ThepurposeoftheDeveloperTestistoprovidetheimplementationofasubsetofrequiredtestsinanefficientandeffectivemanner.
MostoftheDeveloperTestsarecreatedinthesametimeframesasthesoftwarecomponentsthatneedtobetested.

41. Component-UML
Amodularpartofasystemthatencapsulatesitscontentsandwhosemanifestationisreplaceablewithinitsenvironment.Acomponentdefinesitsbehaviorintermsofprovidedandrequiredinterfaces.Assuch,acomponentservesasatype,whoseconformanceisdefinedbytheseprovidedandrequiredinterfaces(encompassingboththeirstaticaswellasdynamicsemantics).

42. Anencapsulatedpartofasystem,ideallyanon-trivial,nearlyindependent,andreplaceablepartofasystemthatfulfillsaclearfunctioninthecontextofawell-definedarchitecture.Thisincludes:
•designcomponent-asignificantencapsulatedpartofthedesign,andsoincludesDesignSubsystemsandsometimessignificantDesignClassesandDesignPackages.
•implementationcomponent-asignificantencapsulatedpartoftheimplementation,generallycodethatimplementsadesigncomponent
Component-RUP

43. ComponentReplaceability(RUP)
•Source-FileReplaceability:Thischaracteristicmakesiteasierforcomponentsourcecodetobeversion- controlled,baselined,andre-used
•DeploymentReplaceability:thereisonefileoronesetoffilesthatdeploythecomponentandnoothercomponent
•Run-TimeReplaceability:Thisenablessoftwaretobeupgradedwithoutlossofavailability.
•LocationTransparency

44. More aboutComponents
•http://www.agilemodeling.com/artifacts/componentDiagram.htm
•http://www.ibm.com/developerworks/rational/library/dec04/ bell/

45. Finally… don’tforgettheTraceability!

46. Finally… don’tforgettheTraceability!

47. Finally… don’tforgettheTraceability!

48. ImplementationEnviromentFeatures(Sommerville)
Asoftwaredevelopmentplatformshouldprovidearangeoftoolstosupportsoftwareengineeringprocesses.Thesemayinclude:
1.Anintegratedcompilerandsyntax-directededitingsystemthatallowsyoutocreate,edit,andcompilecode.
2.Alanguagedebuggingsystem.
3.Graphicaleditingtools,suchastoolstoeditUMLmodels.
4.Testingtools,suchasJUnitthatcanautomaticallyrunasetoftestsonanewversionofaprogram.
5.Projectsupporttoolsthathelpyouorganizethecodefordifferentdevelopmentprojects.

49. Be careful
•Implementationhavepatternsalso….
•SeeCleanCodeofRobertC.Martin,andImplementationPatternsofKentBeck

50. Be careful(http://www.agilemodeling.com/artifacts/componentDiagram.htm)
UML1.0
UML2.0

51. Thanks for your attention
fdgiraldo@uniquindio.edu.co