Microservices Built for Digital Consumption

World®’16

MicroservicesBuiltforDigitalConsumptionLouPowell– FoundingPartner– Vanick Digital

DO3X23V

DEVOPS

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Abstract

TheMicroservice patternhasbeenaroundforover10years,butthedigitalrevolutionhaselevatedthevisibilityandvalueofthispattern.InthissessionwewillcoverdesignpatternsandconsiderationsforbuildingMicroservices thatallowyourorganizationtofuelhighlyperformantdigitalexperiences.

LouPowell

Vanick DigitalFoundingPartner


Abstract

TherecentinterestinMicroservices hasbeenspurredprimarilybybusinessdemandtodelivertechnologysolutionsthatsolveDigitalproblemsfaster.

So,asyoubuildyourMicroservices,hereareafewdesignconsiderationsthatyoucanapplythatwillensurethatyoursolutionmeetsdigitalexpectations.

LouPowell

VanickDigitalFoundingPartner

“Themarriageofsomereallygreatclientappswithsomereallygreatcloudservicesisincrediblypowerful"

-SteveJobs2007@D3PriortotheiPhoneLaunch


5DesignPrinciples

1. FaçadeorBfFs ServiceLayer

2. Cacheability

3. Performance

4. ABAC

5. ReduceFriction

forDigitalFriendlyMicroservices


FaçadeLayerorBack-endforFront-end

(BfF)


FaçadePattern

§ The facadepattern (or façadepattern)isa softwaredesignpattern commonlyusedwith object-orientedprogramming.Thenameisbyanalogytoan architecturalfacade.


Backends forFrontends(BfF)

TheBFFistightlycoupledtoaspecificuserexperience,andwilltypicallybemaintainedbythesameteamastheuserinterface,therebymakingiteasiertodefineandadapttheAPIastheUIrequires,whilealsosimplifyingprocessofliningupreleaseofboththeclientandserver components.

Source:http://samnewman.io/patterns/architectural/bff/


DigitalArchitectureLayers

Omnichannel

Platforms

APIs

CoreServices&Microservice


Overtime,Hootsuitehasclassifiedtheirmicroservicesintothreecategories:dataservicesthatencapsulatekeybusinessentitiesandensurescalability,functionalservicesthatcombinedataserviceswithbusinesslogictoexecutecorebusinesslogic,andfaçadeservicesthatdecoupleconsumercontractsfromcorefunctionallogic.

HootSuite


ThekeydriverforthisredesignedAPIisthefactthattherearearangeofdifferencesacrossthe800+devicetypesthatwesupport.MostAPIs(includingtheRESTAPIthatNetflixhasbeenusingsince2008)treatthesedevicesthesame,inagenericway,tomaketheserver-sideimplementationsmoreefficient.Andthereisgoodreasonforthisapproach.ProvidinganOSFAAPIallowstheAPIteamtomaintainasolidcontractwithawiderangeofAPIconsumersbecausetheAPIteamissettingtherulesforeveryonetofollow.

Whileeffective,theproblemwiththeOSFAapproachisthat itsemphasisistomakeitconvenientfortheAPIprovider,nottheAPIconsumer.Accordingly,OSFAisignoringthedifferencesofthesedevices;thedifferencesthatallowustomoreoptimallytakeadvantageoftherichfeaturesofferedoneach.

Netflix


FaçadeorBfF Serivces

FaçadesorBfF

Microservices


ConsumerFocusedThisservicelayerisconstructedbasedonthespecificusecasesoftheconsumer,makingconsumptionandadoptionoftheservicesimplerandmoresuccessful.

BenefitsofFaçadeorBfF Services

SimplifyCoreServicesBypushingthespecificconsumptionneedsoftheconsumersup,youwillbeabletomaintainasimple,comprehensible,generalpurposecoreservice.

ExpectedTransienceThislayerisintendedforfragmentation,iterationandinnovation.Changeisgood,aslongasadoptionfollows.

HelpsManageRiskTheabilitytoquicklysurfaceanewendpointswithoutdisruptingexistingendpointsbasedonriskwillallowforprogramvelocity.


BuiltforCacheability

Cache


UnderstandingWhyWeCache

§ ReduceDataRetrievalTimes

§ ReduceComputeTime

§ ShortenthePipe

§ ReduceSystemandNetworkLoad


Microservice CacheConsiderations

§ Understandconsumptionpatterns

§ Cachedatabasedonconsumption

§ Cacheoptimizedofrequests

§ Cacheoptimizedforpayloads

§ Cachethefaçade


(TTI)Performance

(TTFB)


ConsumerExperienceExpectations

TTFBmeasuresthedurationfromtheuserorclientmakinganHTTPrequesttothefirstbyteofthepagebeingreceivedbytheclient'sbrowser.

TTI isthepointatwhichapagedisplaysitsprimaryinteractivecontentthatwillallowausertoreasonandact.

APICalls APICalls

Over100Resources

LessThan2Seconds

https://www.sitepoint.com/average-page-weight-increased-another-16-2015/


CQRS

CommandQueryResponsibilitySegregation(CQRS)isanarchitecturalpatternthatseparatesreadingandwritingdataintotwodifferentmodels.

CQRSisabestfitpatternfordigitalconsumptionwherequerydemandonthedataisexponentiallyhigherthancommand(resourcestatechange)ordifferentindatastructure.


PolyglotPersistenceofData

§ Choosetherightdatastorefortheproblembeingsolved

§ Chooseadatastorethatwillgivethebestperformance

§ Chooseadatastorethatyouhavecommittedtosupportingandhaveexpertisein


AttributeBasedAccessControl

(ABAC)


Role-basedaccesscontrol (RBAC)isamethodofregulatingaccesstocomputerornetworkresourcesbasedontherolesofindividualuserswithinanenterprise.Inthiscontext,accessistheabilityofanindividualusertoperformaspecifictask,suchasview,create,ormodifyafile.

ABAC isalogicalaccesscontrolmodelthatisdistinguishablebecauseitcontrolsaccesstoobjectsbyevaluatingrulesagainsttheattributesoftheentities(subjectandobject)actionsandtheenvironmentrelevanttoarequest.


RemoveFriction

SmartEndpointsDumbPipes


SmartEndpoints– DumbPipes

Themicroservice communityfavorssmartendpoints

anddumbpipes.Applicationsbuiltfrom

microservices aimtobeasdecoupledandas

cohesiveaspossible- theyowntheirowndomain

logicandactmoreasfiltersintheclassicalUnix

sense- receivingarequest,applyinglogicas

appropriateandproducingaresponse.Theseare

choreographedusingsimpleRESTish protocolsrather

thancomplexprotocolssuchasWS-Choreographyor

BPELororchestrationbyacentraltool.


FrictionlessDataFlow

§ DesignStandards

§ Vocabulary

§ Objects


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DevOps– APIManagementandApplicationDevelopment

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[email protected]

LouPowell

@vanicklou

https://www.linkedin.com/pub/lou-powell/4/ba1/170

vanick.com

Microservices Built for Digital Consumption

Technology