Gateway - How to bring down our monolith

Talk given during a PHP meetup in Poland. I present here the main problems of the old BlaBlaCar monolith and how we are trying to change.

Transcript

1. Benjamin De Bernardi Gateway How to bring down our monolith
2. Benjamin De Bernardi Web Developer @Genes0r
3. The infamous V3
4. Front Admin API Workers Monolithic application
5. It’s huge
6. 406 187 NLOC There are “only” 268 041 NLOC for symfony/symfony
7. 29 582 Commits There are “only” 15 506 commits for symfony/symfony There are “only” 10 228 commits for joyent/node There are “only” 9 266 commits for twbs/bootstrap There are 44 809 commits for rails/rails (but it’s ruby… #troll)
8. ~ 75 contributors There are 1 193 contributors for symfony/symfony
9. ~ 30 minutes to run all the unit tests
10. What else ? • Long learning curve • Too many side effects • Time consuming • Big maintenance • Spaghetti code
11. Now & the future
12. countries NEW IN 2015 India Mexico Hungary Romania Serbia Croatia 19
13. Exponential growth 20 million members in April 2015
14. BlaBlaCar is deploying multiple datacenters
15. We need to localize our data
16. MICRO-SERVICES
17. Micro-services Users, ratings, notifications, ridemap...
18. Overview
19. Overview
20. NO API!
21. The gateway
22. • It’s code. • It uses DDD. • Everyone love it! • It’s very well organized. • There’s a lot of (very) strict rules. • It separates business logic & data access. • It’s a vendor! It’s easy to use everywhere!
23. How to: Get a rating
24. Business
26. Request
27. Usage
28. Usage
29. Usage
30. Handler
31. Data
32. • Cache ready • backend agnostic
33. • Cache ready • Backend agnostic Encapsulation !
34. D BALStorage
35. RedisStorage
36. Gateway • Flexible • Very strict • Easy to test • Deployed when needed • Used for all new projects
37. V3 Previous ecosystem
38. Gateway V3 W W W W W C W C C C W Current ecosystem W • 90 workers • 40 commands
39. V3 W W W W W C W C C C W Future ecosystem? W Gateway Gateway Gateway
40. V3 W W W W W C W C C C W Future ecosystem? W B B B B B B D D D
41. Micro services are not a silver bullet, they won’t solve all your problems. We are still working on our gateway stuff :)
42. Thank you Bisous Buziaczki