Mediating Mature Services, ESBs and APIs: Lessons Learned from Five Years of API Management...

transcript

World®’16

MediatingMatureServices,ESBsandAPIsTomPorterfield- SeniorSoftwareEngineer- UnumAlisonLucy- SoftwareEngineer- Unum

DO3X19S

DEVOPS

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Abstract

Buildinguponthepopular‘LessonsLearnedFrom5YearsofAPIManagementSuccess’sessionfromlastyear'sCAWorld,Unum'sTomPorterfieldandAlisonLucywilldiveintoakeyareaofAPIManagement– servicemediation.SOAandESBarchitecturesstillandwillexistinorganizationsaroundtheworld.Learnhowusinggatewaystosuccessfullyintegrate,govern,andreducethecostofolderandlegacysystemsincreasesthevalueandROIofyourAPIManagementsolution.

TomPorterfieldUnumSr.SoftwareEngineer

AlisonLucyUnumSoftwareEngineer

Agenda

ABOUTUNUM

SOA@UNUM

ESBTECHNOLOGY@UNUM

MEDIATION

PUTTINGITALLTOGETHER

AboutUNUM

WhoisUnum?Unumisaleadingproviderofemployeebenefits,includingdisability,lifeandvoluntaryinsurance.NearlyoneinfiveU.S.employerswhoprovidegrouplongtermdisabilitybenefitsandmorethan42percentoftheFortune500dobusinesswithUnum.WithoperationsintheUnitedStatesandtheUnitedKingdom,Unumisadiversefamilyofbusinesseswitha160-yearhistory.

OurfamilyofbusinessesUnumGroup consistsofUnumUS andColonialLife intheUnitedStatesandUnumUK intheUnitedKingdom.WithprimaryofficesinChattanooga,Tenn.,andPortland,Maine,Unumemploysabout10,000peopleworldwide.UnumUS isamarketleaderingroupandindividualdisabilitybenefitsintheUnitedStates,andisoneofthelargestprovidersofgrouplifeandvoluntaryworkplacebenefits.ColonialLife isoneoftheleadingprovidersofvoluntaryworksitebenefits,includingdisability,life,accidentandcriticalillnesscoverage,intheUnitedStates.UnumUK istheleadingproviderofincomeprotectionandcriticalillnesscoverageintheUnitedKingdom,andalsooffersdualbenefitandlifeproductsandservices.

Unum'svisionandvaluesUnum'svisionistobetheleadingproviderofemployeebenefitsproductsandservicesthathelpemployersmanagetheirbusinessesandemployeesprotecttheirfamiliesandlivelihoods.

SOA@Unum

WhatisSOA

§ ServiceOrientedArchitecture(SOA)isdrivenbybusinessagilityneed,nottechnicaladvancements

§ SOAisanarchitecturalstyle– Contrarytosomevendors,youcannotbuyaSOA– Itisaboutapproachesandprinciples,notfixedtechnicalsolutionsorpatterns

§ Focusesonreuse,agility,integration,interoperability,standards…

§ SOAisabouttheprinciplesofconstructingloosely-coupled,reusable,application-agnosticbusinessservices

§ SOAisaboutfocusingonbuildingservicesthatmaptobusinesscapabilities

Unum’sApproach

BusinessCapabilityMapping:§ TheenterpriseDomainModelAKABusinessObjectModelisaconceptual

model,whichdefinesthebusinessobjectsofinteresttotheenterpriseandhowtheyrelatetooneanother

§ Itmayalsodefinecriticalattributesassociatedwithagivenbusinessobject,especiallyiftheyareneededforbusinessrules;however,thismodelisnotafullyattributedmodel

§ ThismodelsetsthestagefordrivingouttheenterprisevocabularythatisthenexpandedupononcethefullyattributeddataobjectsarebuiltoutintheEnterpriseDataandMessageModels

EnterpriseModels

IT Owned:

Business Object Model

(aka Domain Model)

Enterprise Data Model

(logical view)

Enterprise Message Model

(physical view)Drives

generation of entity schemas

EnterpriseGlossary of

Central source of all business

concepts/objects and terms identified through project initiatives and

used in development of rules. Provides for an

enterprise wide common language and meaning of terms used in the

business.

Database ImplementationData Models

e.g., DB2, SQL Server, Teradata

Logical Data

Physical Data

LEGEND:Green = Enterprise ModelsBlue = Database Models (application level)Pink = Enterprise Glossary

Enterprise Service Model

(Service Interfaces & Contracts)

LogicalLayersoftheArchitecture

rprise

UserExperience(UX)• RoleBasedUserExperience

Services• Accesstodata,workflowandrulesisviaservices

• Accesstoorchestrationviaqueues

Data• Databases• LegacyAssets

Workflow

Orchestration

Business ServicesEmployer

Service

rvices

ClaimService

Internal Desktop

Browser\IVRUX

CTI Desktop for

Telephonic Role

NativeDataAccess

LegacySystemIntegration

ESBTechnology@Unum

WhatisanESB?§ Fundamentally

– Anarchitecture

– Middleware

§ Providesamechanismforintegratingnumerousapplicationsoverabus-likeinfrastructure,usingaconsistentsetofrulesandprinciples

§ Incorporatesthefeaturesrequiredtoimplementaservice-orientedarchitecture

§ Itsprimaryuseisintegrationofheterogeneousandcomplexlandscapes

§ Promotesagilityandflexibilitywithregardtocommunicationbetweenapplications

§ Keyfunctions– Transformation(XML,COBOL,CSV,Json)

– Portabilitybetweendifferentoperatingenvironments

– Failover

P2PvsSOAandESB

IncreasingorganizationalagilitybyreducingtimetomarketfornewinitiativesisoneofthemostcommonreasonsthatcompaniesimplementanESBasthebackboneoftheirITinfrastructure.

Tightlycoupled,complexEachapplicationmustunderstandthedetailsoftheapplicationswithwhichitinterfaces

Looselycoupled,simplerNoneedfortheapplicationstoknowthedetailsoftheothers

AddingaMediationGateway

WhatisServiceMediation

§ Anintermediatelayerbetweenserviceclientsandphysicalservice– Providesaunifiedinterfacetoserviceclients

§ akavirtualservice,comparedtophysicalservice

– Serviceclientsnolongercommunicatedirectlywithphysicalservice– Servicemediationcaninterpretmessagerequestsfromserviceclientsand

decidehowtocommunicatetherequesttothephysicalservice– Servicemediationisfullytrustedbyphysicalservice– Fromaclientperspective,theserviceresponseonlycomesfromthemediated

(virtual)service.Clientisunawareofphysicalimplementation

BenefitsofServiceMediation

§ Separatephysicalservicetechnicalimplementationfromserviceclientstoallowmoreflexibleserviceimplementation,suchasversioning,physicalserverlocationandsetup,servicetechnologyselectionandsoon– Servicemediationexposesvirtualserviceinterfacewithservicecontractthatcanbeaccessedwith

industrystandardwayofcommunication,butnotaparticularservicecommunicationrequirement– Physicalserviceselectsaparticularvendorproductortechnologythatfitsbestwiththephysical

servicelogicimplementation– PhysicalServiceclientswillonlycareaboutservicecontractandusethestandardwaytoaccess

service

§ Physicalservicefocusesonimplementingservicelogictodeliverbusinessrequirementsandleavesservicemediationtohandleadditionalservicerequirements,suchassecurity,exceptionformatting,messagevalidation,etc.

§ Servicemediationappliesruntimepolicyandcapabilitiestofiltermessagetraffic,validatemessages,controltraffic,routetrafficandsoon

CAAPIGateway

§ Usedasamediationgatewayforallofourenterpriseservices(andanumberoftacticalservices)forinternalandexternalconsumers

§ Providesadditionalflexibilitybydecouplingtheconsumerserviceendpointfromthephysicalimplementation– Allowingforsplitrouting

§ Sendmessagetodifferentphysicalservicebasedonserviceversion– Controlserviceavailability

§ Preventmessagesfrombeingroutedtophysicalservicewhenthatserviceisscheduledtobeunavailable– Throttleconsumertraffic

§ Preventahighvolumeconsumerfromimpactingoverallserviceperformancebyrestrictingtheamountoftrafficthatconsumerisallowedtosendtoaservice

§ SecurityandValidation– Centralizedauthenticationandauthorization– Messagevalidation

§ Preventsinvalidmessagesfromeverreachingthephysicalservice

§ Andmore…

RoleinUnum’sSOAArchitecture

TechnologyRoles

IBMIntegrationBus

§ Complextransformations

§ Complexintegrations

§ MQmessaging

CAGateway

§ Security

§ Mediation

§ MessageValidation

§ SimpleTransformations

PuttingitAllTogether

BuildingaMessageBasedArchitecture

OurApproach

§ BuildEnterpriseServicesusingStandardprotocols

§ Addamediationlayer

§ AddafullESB

§ Connectitalltogether

ABetterApproach

§ BuildafullESBcomprisedofindustryleadingtools

§ Separateresponsibilitiesbasedonbest-in-breedapproach

§ Usethatflexibilitytoexpose/buildbusinesscapabilities

§ Connectitalltogether

CAAPIGatewayWorkingWiththeESB

§ Protection– Nounauthorizedaccesstoservices– Invalidmessagesstoppedat

theperimeter

§ Reliability– Throttlehighvolumeconsumers

(BizTalk)topreventimpacttocustomers

– Enforceusagemetrics(Salesforce)

§ Flexibility– Decoupleconsumerfrom

implementation– Routingbasedonversionorother

messagecontent

SecuringthePerimeteroftheWebService/APIBoundary

CA API Gateway

Service Client

IBM Integration Bus

Enterprise Identity Provider

Management Console

Application Servers

Mainframe

MDMServer

Informatica

Questions?

Thankyou.

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