do you really want to go fully micro?

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Do you really want to go fully micro?

Do you really want to go fully micro?

Robert MunteanuAdobe


Who I am $DAYJOB

Adobe Experience Manager Apache Sling Apache Jackrabbit Apache Felix

Open Source Apache Sling MantisBT Mylyn Connector for MantisBT Mylyn Connector for Review Board


Agenda● Microservices and monoliths● Microservices and microservices● A middle ground?● Apache Sling primer● Demo Application● Conclusion


Microservices – the cool factor


Microservices – best tool for the job


Microservices – always think of failures


Microservices – simpler scaling


Microservices – different reusability


Microservices – faster deployment


Microservices – faster delivery

Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8

Release Release Release

Week 1h Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8

SearchCataloguePayment

Payment SearchPayment

CataloguePayment

SearchPayment

Payment SearchCataloguePayment

Payment


Monoliths – crowdsourced wisdom


Monoliths – less distributed computing1. The network is reliable

2. Latency is zero

3. Bandwidth is infinite

4. The network is secure

5. Topology doesn't change

6. There is one administrator

7. Transport cost is zero

8. The network is homogeneousThe Eight Fallacies of Distributed Computing, Peter Deutsch, 1994


Monoliths – Latency/Bandwidth


Monoliths – Security


Monoliths – less operations overhead


Monoliths – better code reuse


Monoliths – simpler availability

Ordering

Search

Catalogue

User Preferences


Monoliths – easier service discovery


Monoliths – easier troubleshooting


Microservices and microservices


How to choose?● What are you trying to solve with microservices?● What level of technical diversity does your organisation have?● Are you comfortable with partially embracing microservices?


A middle ground – using an API gatewayProvides:● Authentication● Authorization● KPIs● Circuit breakers

Must be:● Lightweight● Stateless● Extensible


Middle ground – transparent API gateway

API Gateway

Billing Microservice

Consumer

PUT /payments/

PUT /payments/

201 CreatedContent-Type: application/json

201 CreatedContent-Type: application/json


A middle ground – an advanced gatewayProvides:● Adapter for API changes● Protocol/format unification● Call batching for reduced network usage


A middle ground – transforming API gateway

API Gateway

Catalog Microservice

Consumer

GET /special-offers

GET /special-offers

200 OKContent-Type: application/json

200 OKContent-Type: application/json

Search microservice

GET /search/?q=special

200 OKContent-Type: application/xml


Apache Sling – Brief History

2007Incubation

2009TLP

2015Version 8

200xPre-Apache


Apache Sling – Code Statistics


Apache Sling – Contributor activity


Apache Sling – Value proposition● Content-oriented/RESTful ● Lightweight● Extensible● Easily deployable


Sling – Repository view of the world

[sling/redirect][catalog/welcome][catalog/category]

[page/specials]

//catalog/catalog/watches/special-offers


Sling – ResourceProviders

//customers/inventory/orders

CustomerµService

InventoryµService

OrdersµService

Logg

ing

KPIs

Circ

uit B

reak

ers

Auth

enti

cati

onAu

thor

izat

ion


Agenda● Microservices and monoliths● Microservices and microservices● A middle ground?● Apache Sling primer● Demo application● Conclusion


Demo application - overview


Demo application - authentication


Demo application - JWT


Demo application – Actual demo!!!!one


Conclusions – Apache Sling● Eventing, Thread Pooling, Job Management, Caching● Scripting: Groovy, Scala, JSP, Sightly, Java, Ruby, Thymeleaf● Flexible resource rendering with resource types● Very extensible due to being internally powered by OSGi – most extension points available to clients


Conclusions – Microservices● Microservices are a useful tool, but make sure you understand the tradeoffs● Microservices are not an all-or-nothing proposition, pick what is best for your organisation● An API gateway can bring a lot of value to a microservices deployment● Try Apache Sling today


Resources●Apache Sling – https://sling.apache.org ●Apache Jackrabbit

● https://jackrabbit.apache.org● http://jackrabbit.apache.org/oak/

●JWT – https://jwt.io●Netflix Hystrix - https://github.com/Netflix/Hystrix

https://sling.apache.org/

https://jackrabbit.apache.org/

http://jackrabbit.apache.org/oak/

https://jwt.io/

https://github.com/Netflix/Hystrix

do you really want to go fully micro?

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