Prezentace z webináře 20.6.2019 Prezentoval: Branislav Majerník - Solution Architect a Data Science Technology Consultant, Oracle

1. Microservices architecture
Two programmers were arguing from where the power of Unix comes. One said: “The
applications give us the power.”
The other said: “No, it’s the operating system kernel which enables the applications to
be powerful.”
Master Foo happened to be passing by. He told them: “Not the applications, not the
OS kernel; it’s the Unix spirit which gives us the power.”
branislav.majernik@oracle.com

2. What customer expect from apps today
• Lot of and fast business functionality.
• App business performance.
• Quick extension of business functionality, fast adapt to changes.
• Multifrontend (Mobile, SPA, MPA Web).
• Multichannel (Whatsapp, Viber, Facebook, …)
Source of pictures://Microservices from design to deployment by Chris Richardson & Floyd Smith
Business experience
DevOps experience
• Simple and fast functionality implementation.
• Scalability, elasticity.
• Quick change request, testing, deployment.
• Isomorphic programming and frameworks.
• Simple thirth API implementation.

3. Monolithic apps
Source of pictures://Microservices with Clojure

4. ->>
Source of pictures://Microservices with Clojure

5. Scalability, pluggable, extendable
Source of pictures://Microservices from design to deployment by Chris Richardson & Floyd Smith

8. DevOps

9. Distributed data layer
Source of pictures://Microservices with Clojure

10. Source of pictures://robime.it
CQRS

11. Source of pictures://Microservices with Clojure
Event sourcing

12. DDD – bounded context
Source of pictures://Microservices with Clojure

13. Hexagonal architecture
Source of pictures://Microservices with Clojure

14. Synchronous model – REST API
Source of pictures://Microservices with Clojure

15. Asynchronous model - observer
Source of pictures://Microservices with Clojure

16. Creating small well apps
Source of pictures://Microservices from design to deployment by Chris Richardson & Floyd Smith
• Order a taxi
• Track the cab
• Make the payment
• Receive notifications
• Leave commentaries
Challenge
The customer wanted to order a taxi-hailing platform development.
One of the requirements was to make it cross-platform (operate either as a web application or as a phone app).
The standard functionality was required:
• Passenger Management
• Driver Management
• Trip Management
• Dispatcher
• Payments
• Notifications
• Billing
Approach
Services decomposition, focus on business domain services

17. From ArchiMate to APImade

18. API Design - > Scaffolding generator

19. Isomorphic implementation, front <-> back

20. Examples

21. Scale out

22. Scale out

24. Examples
https://medium.com/@cramirez92/build-a-nodejs-cinema-microservice-and-deploying-it-with-
docker-part-1-7e28e25bfa8b

25. Follow (Id)us