apache sling as a microservices gateway

http://robert.muntea.nu @rombert

Apache Sling as a Microservices Gateway

Apache Sling as a Microservices Gateway

Robert Munteanu, Adobe SystemsVoxxed Days Bucharest 2016

http://robert.muntea.nu/


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

● Of microservices and monoliths● Advantages of microservices● Advantages of monoliths● A middle ground?

● Apache Sling primer● Meeting Barry● Demo Application● Conclusion



Advantages of microservices



Advantages of microservices – best tool for the job



Advantages of microservices – always think of failures



Advantages of microservices – simpler scaling



Advantages of microservices – faster deployment



Advantages of microservices – different level of reusability



Agenda





Advantages of monoliths – crowdsourced wisdom



Advantages of monoliths – less distributed computing

1. 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



Advantages of monoliths – Latency/Bandwidth



Advantages of monoliths – Security



Advantages of monoliths – less operations overhead



Advantages of monoliths – better code reuse



Advantages of monoliths – simpler availabilty



Advantages of monoliths – easier service discovery



Advantages of monoliths – easier troubleshooting



Agenda





A middle ground – value proposition

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



A middle ground – using an API gateway

Provides:● Authentication● Authorization● KPIs● Circuit breakers● API adaptions

Must be:● Lightweight● Stateless● Extensible



Agenda





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● OSGi-powered ● Easily deployable



Apache Sling – Repository view of the world

[sling/redirect][sling/redirect]

[blog/welcome][blog/page]

//content/content/blog/content/blog/hello-world



Apache Sling – gateway through ResourceProviders



Apache Sling – gateway through ResourceProviders

//customers/inventory/orders

CustomerµService

InventoryµService

OrdersµService

Logg

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KIP

Mea

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men

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Auth

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Agenda





Meeting Barry



Agenda





Demo application - overview



Demo Application - authentication



Demo Application - JWT



Demo Application – Actual demo!!!!1oneone



Agenda





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

apache sling as a microservices gateway

Technology