John Knowles and Richard McLeod from JH Magento Solution Partners in Nottingham talk about the transition from Magento 1 to Magento 2 and how Magento listened to the community.

1. Magento 2
Replacing God with Dependency Injection

2. John Knowles (@knowj)
Lead Developer JH
Richard McLeod (@RMcLe0d)
Senior Developer JH

4. ● Open source ecommerce platform
● Currently holds ~22% market share
● Started development in 2007
● Until recently owned by Ebay
● Magento 2 released November 2015
What is Magento?

5. Magento 1

6. The Good
● Extremely flexible
● Amazing community with a wide range of extensions
● Rarely have to write a payment integration
● Community driven composer compatibility

7. The Bad
● Learning curve (Limited documentation)
● Rewrite system
● Few interfaces
● Lots of extension
● No tests

8. The Ugly
● XML config errors
● Extension conflicts
● Monolithic static logger
● Core Hacks
● Mage::!!!!

9. At least it’s not WordPress!

10. Magento 1 VS Magento 2

11. Magento 1 - XML Config “errors”
2 hours xDebugging through the core to find this was the problem!

12. Magento 2 - XML Config Errors

13. Magento 1 - Rewrites

14. Magento 2 - Plugins
● Interception Pattern
● Before
● After
● Around
● No more rewrites!
Seriously EVERYWHERE!

15. Magento 2 - Plugins cont...

16. Magento 1 - The God Class
<?php
final class Mage

17. What is the God class?
● 1 final class
● 43 static methods
● 1000’s of developers crying

18. Opinions?

19. Or this?

20. The problems
● Hard to test (but possible)
● Single argument construct
● Black box nature
● Logging nightmare
● Rewrite architecture

21. Magento 2 - Goodbye to the God class

22. Magento 2 - Hello Dependency Injection

23. Magento 2’s DI Container
● Constructor Injection
● XML config
● Magento built DI container

24. Example of DI.xml

25. Magento 1 - Interfaces

26. Magento 2 - Service Contracts
● Repository Interface
● Management Interfaces
● Data Interfaces
● Search Results Interface
● Meta Data Interfaces
● Service contracts is interfaces!

27. Magento 2 - Service Contracts cont… Benefits
● Dependency Injection
● Guaranteed API
● Ties in with Semantic Version

28. Magento Listened!

29. Standards
● PSR-0 to 4
● Semantic Versioning
● Namespaces
● Dependency Injection
● Better Pattern Usage
● Interfaces

30. Features
● Feature parity with Magento 1
● CLI tool
● Varnish
● Unit and Integration and Functional Tests
● Enterprise - Multi Master/Split Databases
● Enterprise - Message Queues (RabbitMQ)

31. Developer friendly
● PHP7
● Still XML config but with XSDs
● Improved events
● Dependency Injection
● Plugin architecture
● Service Contracts (Interfaces)

32. Thanks for listening!
John Knowles (@knowj)
Lead Developer JH
Richard McLeod (@RMcLe0d)
Senior Developer JH

33. Any Questions?