Mainframe Application Modernization for Enterprise Developers

World®’16

MainframeApplicationModernizationforEnterpriseDevelopersRyanJohnson- ExecutiveDirector- FacetConsulting

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Abstract

Manyorganizationsdependonenterpriseapplicationstodrivetheirbusiness,andhaveinvestedsignificantlyinthese,oftenovermanydecades.Despitebestefforts,COBOLisstillthedominantprogramminglanguageusedinthesesystems.Thechallengefortheseorganizationsisupdatingandmodernizingthesecomplexenterpriseapplicationsatthespeedtheapplicationeconomydemands.Oftheapproachestomodernization,renewalisasoundoptionwhenbalancingcost,riskandtheneedtodelivervaluetothebusinessasquicklyaspossible.CAGenisanagiledevelopmenttoolthatwillaccelerateyourdeveloperproductivity,reduceyourmaintenancecostsandfuture-proofyourapplicationfordecadestocome.

RyanJohnsonFacetConsultingExecutiveDirector


Agenda

MAINFRAMEAPPLICATIONMODERNIZATION?

CAGEN:ANAGILEDEVELOPMENTSOLUTION

AUTOMATIONCOMPLETESTHEPICTURE

DEMONSTRATION

SUMMARY

1

2

3

4

5


WhatisMainframeApplicationModernization?

§ Refactoring,re-writing,convertingorreplacingalegacyapplicationtoalignitmorecloselywithcurrentbusinessneeds– Meetthedemandsofbusiness– AddressthefailingsofIT

§ ItisnotApplicationMigration– Movinglegacyapplicationstonewplatforms– Focusisonreducinginfrastructurecosts– DoesnotaddresscorereasonforModernization

CreateNewBusinessValueFromExistingApplications


CharacteristicsofaMainframeApplication

§ Largebyanymeasure

§ SystemsofRecord

§ Missioncritical

§ Matureandinternallycomplex

§ Growingorganicallyoverdecades

§ Outdatedornon-existentdocumentationandtestplans

EnterpriseSystems


DriversforMainframeApplicationModernization

§ DemandsofBusiness– Applicationeconomydrivingfastertimetomarket– Morechange– moreoften– Newchannelsandtechnologiestoreachcustomers

§ FailingsofIT– Applicationcomplexitycausingdelaysandincreasingcost– Applicationsareatriskofbecomingunmaintainable– Disparatetechnologiesandsiloedskillsets.

§ ITisconstrainingbusinessfromdeliveringresults

FromBusinessDrivertoITBottleneck


ApplicationModernizationStrategies

§ ManageRisk– Acknowledgetheapplication’simportance

§ Addressbothdataandcode– Dataisacriticalasset

§ Accommodateapplicationcomplexity– Complexisnormal

ElementsofaSuccessfulModernizationApproach


ApplicationModernizationOptions

§ Rewrite– Let’sthrowitawayandstartagain

§ Replace– Acquireoneormoresoftwarepackagesdeliveringthe

samefunctionality

§ Renew– Modernize/Transform/Refactorwhatyoucurrentlyhave

HowtoBreaktheDeadlock?



§ Potentiallythebestoutcome;but…– Veryhighcost– Veryhighriskoffailure– Verylongprojectduration– Longbusinesschangelockdown

§ Historically,verylargeprojects– Mostarepronetofailure– Deliverfewestoutcomes

Rewrite



§ Agoodoptionif..– Packagefunctionalfit>85%– Yourbusinessiscommon– ITisnotabusinessdifferentiator– BusinesswillchangeforIT

§ Ifso,then…– Lowercost,Moderateriskoffailure– Complexdatamigration– LongProjectDuration– Moderatebusinesslockdown

Replace



§ ComparedtoRewrite/Replace– Lowestrisk– Lowestcost– Shortestprojectduration– Shortestbusinesslockdown

§ Thebestoptionwhenyouhave…– Largequantitiesofdata– Uniquebusinessrules– ITisabusinessdifferentiator

Renew


CAGen:AnAgileDevelopmentEnvironment

§ HighDeveloperproductivity– Developerproductivityincreasedthroughmodellingandregeneration

ratherthanmodificationoftargetsource

§ Scalability– DesignedforEnterpriseApplications– Allowsdevelopmentteamstocreateandmaintainlarge-scalebusiness

applicationsformultipleplatformsleveragingasinglesetofskills– Producesstableandscalableapplications– provenworldwide

§ PlatformIndependent– Modeldrivendevelopmentenablesfocusonbusinessrequirements

ratherthantechnology.Generates100%errorfreecode

CharacteristicsofAgileDevelopment


CAGen:AnAgileDevelopmentEnvironmentMulti-PlatformDeploymentOptions

IBMMainframe

DB2

Applications

CAGen

Microsoft

SQL UDB

Applications

AIX/Solaris/HPUX

Oracle UDB

Applications

Linux:Suse/Redhat

Oracle UDB

Applications

GUIWindows3270Screens

Applicationtechnology

Applicationdeploymentplatform

Applicationdeliverychannels

SOAPWebServices

ProxiesJavaand.NET

WebUserinterface Mobile


AutomationCompletesthePicture

§ MigratingCOBOLapplicationstoCAGenoffers– Newapplicationdeliverychoicestosupporttoday’sbusinessdeliverydemands– Consolidationofapplicationtechnologiestosimplifyinfrastructureandreduce

skillsets

§ CAGenisasupersetofCOBOLcapabilities– DeliversallexistingCOBOLmainframeapplicationdelivery– AdditionallyoffersGUI,Web,WebServicesandMobilechannels– AdditionallysupportsMicrosoft,UnixandLinuxdistributedchannels

§ AutomatedsolutiontomigrateCOBOLapplicationsintoCAGen

AutomatedCOBOLtoCAGenMigrationNowAvailable


TheModernizationApproach

§ AutomatedtransformationwithModelCVS STS©

§ COBOLtoCAGendevelopedwithCATechnologies

§ Objectmodellingapproachtotransformation– Consistent– Scalable– Fastertimetomarket,minimizesbusiness-changelockout

§ Proventransformationtechnology– Over1.6billionlinesofapplicationcodemigrated

Howtogetfromheretothere?


TheModernizationApproachTheTransformationProcess

3.Refactor

2.Analyse

100%AutomatedExtraction

Applicationbusinessrulesanddatastructures

1.Extract

4.Transform

100%Automated

Transformation



§ ParsingtheSourceCode– ValidatesthesourceasCOBOL– Lexicalanalysis

§ Storingitasametamodelinstance– Createstheinitialobjectmodel– Selfvalidating– Basisforsubsequentanalysis

Extraction



§ Understandanddocumentthe‘As-Is’ApplicationbeforeModernizing

§ CategorizetheApplicationArchitecture– PresentationLayer– BusinessLogicLayer– PersistenceLayer

Analysis



§ DeepDiveAnalysis– DataFlow(global,localvariables)– CallingHierarchy– Persistence(DataBase,FileUsage)– SystemInterfaces– BusinessRules– ProgramTemplates/Patterns

Analysis



§ Semi-AutomaticArchitecturalRestructure– EliminateGOTOstatements,RecursionandREDEFINES– Eliminatetechnicalartifacts(e.g.CICSorDB2parameters)– MergeSectionsandParagraphsintosingleCAGenroutines– ServiceOrientedDecomposition(BuildingUtilitiesand

IsolatedServices)

§ Focusondeliveringwellstructuredapplicationarchitecture

Refactoring



§ TransformationintotheCAGenmodel– DataStructure

§ Tables§ Relationships

– ApplicationLogic§ Procedures§ ActionBlocks

– UserInterface

Transformation


LetsTakeaLookatThisinAction

§ FromCOBOLtoCAGen

Demonstration


ProvenTechnology

§ AUSTRIANMINISTRYOFDEFENSE(BMLV)– FoundationcustomerfordevelopmentofModelCVStechnology

§ ISBank,Turkey– 15MillionLinesofautomatedCOBOLrefactored– 1500IMSdatabasesmigratedtoDB2

§ AEGONINSURANCE,TheNetherlands– ConsolidatedDBtechnology– IDMStoDB2(300+tables)– 5MillionlinesofautomatedCOBOLrefactored

STSReferenceCustomers


ModernizeyourMainframeApplicationswithCAGenManyorganizationsdependonEnterpriseApplicationstodrivetheirbusiness,andhaveinvestedsignificantlyinthese,oftenovermanydecades.Despitebestefforts,COBOLisstillthedominantprogramminglanguageusedinthesesystems.Thechallengefortheseorganizationsisupdatingandmodernizingthesecomplex,enterpriseapplicationsatthespeedtheapplicationeconomydemands.Oftheapproachestomodernization,renewalisasoundoptionwhenbalancingcost,riskandtheneedtodelivervaluetothebusinessasquicklyaspossible.CAGenisanAgiledevelopmenttoolthatwillaccelerateyourdeveloperproductivity,reduceyourmaintenancecosts,andfuture-proofyourapplicationfordecadestocome.AutomatedtransformationfromCOBOLtoCAGenissomethingthatyoushouldconsiderasamodernizationoption.

SummaryAFewWordstoReview


ModernApplicationDevelopmentMainframeTheater

ContinuousDevelopmentandTestingMainframeTheater

MustSeeDemos


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Mainframe Application Modernization for Enterprise Developers

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