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
   

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2. Benjamin De Bernardi
   Web Developer
   @Genes0r
   

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3. The infamous V3
   

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4. Front
   Admin
   API
   Workers
   Monolithic application
   

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5. It’s huge
   

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6. 406 187
   NLOC
   There are “only” 268 041 NLOC for symfony/symfony
   

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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)
   

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8. ~ 75
   contributors
   There are 1 193 contributors for symfony/symfony
   

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9. ~ 30
   minutes to run all the unit tests
   

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10. What else ?
    ● Long learning curve
    ● Too many side effects
    ● Time consuming
    ● Big maintenance
    ● Spaghetti code
    

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11. Now & the future
    

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12. countries
    NEW IN
    2015
    India
    Mexico
    Hungary
    Romania
    Serbia
    Croatia
    19
    

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13. Exponential growth
    20 million
    members in April 2015
    

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14. BlaBlaCar is deploying
    multiple datacenters
    

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15. We need to localize our data
    

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16. MICRO-SERVICES
    

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17. Micro-services
    Users, ratings, notifications, ridemap...
    

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18. Overview
    

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19. Overview
    

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20. NO API!
    

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21. The gateway
    

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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!
    

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23. How to: Get a rating
    

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24. Business
    

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26. Request
    

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27. Usage
    

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28. Usage
    

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29. Usage
    

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30. Handler
    

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31. Data
    

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32. ● Cache ready
    ● backend agnostic
    

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33. ● Cache ready
    ● Backend agnostic
    Encapsulation !
    

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34. D
    BALStorage
    

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35. RedisStorage
    

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36. Gateway
    ● Flexible
    ● Very strict
    ● Easy to test
    ● Deployed when needed
    ● Used for all new projects
    

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37. V3
    Previous ecosystem
    

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38. Gateway
    V3
    W
    W
    W
    W
    W
    C W
    C
    C
    C
    W
    Current ecosystem
    W
    ● 90 workers
    ● 40 commands
    

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39. V3
    W
    W
    W
    W
    W
    C
    W
    C
    C
    C
    W
    Future ecosystem?
    W
    Gateway
    Gateway
    Gateway
    

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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
    

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41. Micro services are not a silver bullet, they won’t
    solve all your problems.
    We are still working on our gateway stuff :)
    

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42. Thank you
    Bisous
    Buziaczki
    

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