mediating mature services, esbs and apis: lessons learned from five years of api management...

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

1

2

3

4

5


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

Terms

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

Model

Physical Data

Model

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

Enterprise Service Model

(Service Interfaces & Contracts)


LogicalLayersoftheArchitecture

Ente

rprise

Com

pone

nts

Secu

rity

UserExperience(UX)• RoleBasedUserExperience

Services• Accesstodata,workflowandrulesisviaservices

• Accesstoorchestrationviaqueues

Data• Databases• LegacyAssets

Workflow

Orchestration

Rule

s

Business ServicesEmployer

Service

Infr

astr

uctu

re S

hare

d Se

rvices

ClaimService

Internal Desktop

UX

Browser\IVRUX

CTI Desktop for

Telephonic Role

NativeDataAccess

LegacySystemIntegration

Queue


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

HTTP

IBM Integration Bus

Enterprise Identity Provider

Management Console

Application Servers

MQ

Mainframe

MDMServer

Informatica


Questions?


Thankyou.

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