Scala from the Trenches - Java One 2016
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My live coding in Java one
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Scala from the Trenches - Java One 2016
- 1. @kfirondev Scala from the Trenches @kfirondev Introduction to TDD and clean code Kfir Bloch Head of Backend Engineering
- 2. @kfirondev KFIR BLOCH ● Head of backend engineering @ Wix ● Hands-on developer above 17 years ● Joined Wix 5 years ago linkedin/in/blochkfir github.com/kfiron@kfirondevkfirb@wix.com
- 4. @kfirondev@kfirondev THE ESSENCE OF TDD REFACTOR MAKE THE TEST PASS WRITE A FAILING TEST
- 5. @kfirondev@kfirondev Great software is something to marvel at: powerful, elegant, functional, a pleasure to work with as both a developer and as a user. Great software isn’t written by machines. It is written by professionals with an unshakable commitment to craftsmanship. “ “
- 6. @kfirondev@kfirondev TDD is based on a simple idea: Write tests for your code before you write the code itself. However, this "simple" idea takes skill and judgment to do well. Now there's a practical guide to TDD that takes you beyond the basic concepts. “ “
- 7. @kfirondev@kfirondev Unit Test FakesCollaborators Stubs Matchers Integration Tests Mocks Contract tests www.maplecityrubber.com TDD & CLEAN CODE “BUZZWORDS” Refactoring
- 9. @kfirondev@kfirondev Get - prize Get - prize OK OK Get - prize Get - prize Already wonAlready played Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Get - prize Already won Already won Already won Already won Already won Already won Already won Already won Already won Already won USER QUIZ PRIZE SERVER DATABASE
- 10. @kfirondev@kfirondev Get - prize Get - prize OK OK Get - prize Already played Get - prize Get - prize Get - prize Get - prize Get - prize Already won Already won Already won Already won Already won USER QUIZ PRIZE SERVER DATABASE FAIL FAST PATTERN T H R O T T L E R ROLLING WINDOW KEY (user-id) THROTTLER
- 12. @kfirondev • TDD & Clean code definitions • DOS attack use case • Developed rolling window throttler • Wire the throttler to pre-baked service Summary of what we did
- 13. @kfirondev • ~120 backend developers • Zero QA engineers • ~100 deployments per day It works for us projectlifemastery.com
- 14. @kfirondev • Throttler code -> https://github.com/kfiron/tdd-clean-code-workshop-result • Demo app code -> https://github.com/kfiron/java-one-demo-app Resources github.com/kfiron
- 15. @kfirondev linkedin/in/blochkfir github.com/kfiron@kfirondevkfirb@wix.com Kfir Bloch Head of Backend Engineering Q&A
- 16. @kfirondev Thank YouWix Engineering Blog http://engineering.wix.com/ We are hiring http://jobs.wix.com email jobs@wix.com @kfirondev Kfir Bloch Head of Backend Engineering
Editor's Notes
- The first case is degradation of service
- Inspire me and drive how I do TDD
- Many people thinks that code before tests, it is just unit tests I will try to show you some of it in the live coding
- The first case is degradation of service
- Already won
- It not about correctness , it is about resources