Scala from the Trenches - Java One 2016

Scala from the Trenches - Java One 2016

• 1.
  @kfirondev Scala from theTrenches @kfirondev Introduction to TDD and clean code Kfir Bloch Head of Backend Engineering
• 2.
  @kfirondev KFIR BLOCH ● Headof backend engineering @ Wix ● Hands-on developer above 17 years ● Joined Wix 5 years ago linkedin/in/blochkfir github.com/kfiron@kfirondevkfirb@wix.com
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  @kfirondev BASICS
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  @kfirondev@kfirondev THE ESSENCE OF TDD REFACTOR MAKETHE TEST PASS WRITE A FAILING TEST
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  @kfirondev@kfirondev Great software issomething 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 basedon 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. “ “
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  @kfirondev@kfirondev Unit Test FakesCollaborators Stubs Matchers Integration Tests Mocks Contract tests www.maplecityrubber.com TDD& CLEAN CODE “BUZZWORDS” Refactoring
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  @kfirondev USE CASE
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  @kfirondev@kfirondev Get - prizeGet - 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 - prizeGet - 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
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  @kfirondev LET’S CODE
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  @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
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  @kfirondev • ~120 backenddevelopers • Zero QA engineers • ~100 deployments per day It works for us projectlifemastery.com
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  @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
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  @kfirondev linkedin/in/blochkfir github.com/kfiron@kfirondevkfirb@wix.com Kfir Bloch Headof Backend Engineering Q&A
• 16.
  @kfirondev Thank YouWix EngineeringBlog http://engineering.wix.com/ We are hiring http://jobs.wix.com email jobs@wix.com @kfirondev Kfir Bloch Head of Backend Engineering