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Adopt OpenJDK - Lessons learned and Where we're going (FOSDEM 2013)

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Adopt OpenJDK - Lessons learned and Where we're going (FOSDEM 2013)

  1. 1. Adopt OpenJDK What we've learned & Where we're going Martijn Verburg (@karianna) Ben Evans (@kittylyst) 1 Slide Design by Kerry Kenneally http://www.kerrykenneally.com
  2. 2. We are pleased to have a legal slide! This work and content is licensed under Creative Commons Attribution-Non Commercial-Share Alike 3.0 Unported License 2
  3. 3. Like last year - why we're partly here... 3
  4. 4. How this talk is going to work • This is a fact! • This is an opinion – We will not poke fun at large corporations • Two sections: – What we've learned (A bit of whining) – Where we're going (What we're hoping to do about it) 4
  5. 5. What is the Adopt OpenJDK program? • A JUG lead initiative to improve participation in OpenJDK • A programme to help improve OpenJDK workflow • An advocacy programme 5
  6. 6. What is its relationship with OpenJDK • A feeder programme of ideas and talent • A mentoring and educational incubator • An place to prototype new social/community workflow ideas • Early feedback mechanism
  7. 7. What is its relationship with OpenJDK • An area to try some small technical ideas • An area to work with casual as well as full-time participants • Ideas and tech will shift to the OpenJDK on merit – Usual OpenJDK rules apply
  8. 8. What we've learned 8
  9. 9. Developers love the idea of OpenJDK • Developers are hugely keen to get involved • They want to help the platform that has given them so much • There is often real significant contributors hiding away, e.g. – Mutability detector – Research from Cambridge University, UK – Working build-infra builds on all major platforms – Richard Warburton & Jim Gough on JSR-310 9
  10. 10. Hackdays are the best way to educate • Hosting hackdays has been very successful – ~10 were held in 2012 • In 2-3 hours, 20-30 developers can get started on OpenJDK – This propagates through conferences and JUGs • Richard can explain how Lambdas and Date/Time went 10
  11. 11. Developers are scared of OpenJDK • They think only Rocket Scientists need apply – They think you need advanced C/C++/Assembler skills – Charlie doesn't help ;-) • They are scared to make public contributions • They are scared they will break something – Lack of access to (open) tests 11
  12. 12. Developers are surprised at the helpfulness • OpenJDK has somewhat of a surly reputation – Several well meaning technologists who have their ideas rejected – Oracle staff are often buy on internal deadlines • Most OpenJDK projects have a very welcoming attitude – This needs to be publicised more 12
  13. 13. Developers can't build OpenJDK easily • Even with build-infra - it's a barrier to entry • Lack of IDE support • make is an unfamiliar build tool for many • Developers guide is out of date 13
  14. 14. Developers can't test OpenJDK easily • Even with jtreg improvements - it's a barrier to entry – TestNG support is very welcome • Lack of access to complete (open) tests • Lack of alternative test platforms • Lack of CI 14
  15. 15. Developers want to code socially • They are used to GitHub/BitBucket • They are used to collaborative code review • They are used to open issue trackers • They used to UI/Ux which leads them to information 15
  16. 16. Developers want to code socially • They are used to ideas/designs being discussed more fully – JEP system whilst seemingly fair is causing frustration • They are used to fairly consistent technical standards – OpenJDK projects all have their own 16
  17. 17. Developers struggle to submit code • Many branches/forests/trees confuse them • webrev is a major hurdle – Patch turnaround times are slow for external contributors 17
  18. 18. Where we're going 18
  19. 19. Developers love the idea of OpenJDK • We're promoting the living daylights out of OpenJDK • 4 new dedicated LJC advocates • A new Brazil-wide programme launched by SouJava • 20+ hackdays planned globally in 2013 19
  20. 20. Hackdays are the best way to educate • 20+ hackdays planned globally in 2013 • All major conferences to hold them – Arranged via the JUG Leaders and Java Champions programme • Hackday materials to be shared on GitHub • LJC Advocates working on Chef/Vagrant builds 20
  21. 21. Developers can't build OpenJDK easily • 5+ JUGs combining to product build instructions – For all major platforms • build-infra friendly IDE build instructions being worked on • chef/vagrant/shell scripts to simply builds 21
  22. 22. Developers can't test OpenJDK easily • Testfest planned with IBM and Oracle et al – TestNG tests will be written • Gentlepersons agreement at Devoxx to open up tests – Oracle, IBM, RedHat, Azul et al • Initial discussions around a secure distributed build farm – Cloudbees willing to donate free compute time/space for this 22
  23. 23. Developers can't test OpenJDK easily • Programme planned to involve JVM F/OSS projects for testing – When M7 is released – Needs infrastructure? • Global test hackdays to co-ordinate testing and results – TBA 23
  24. 24. Developers want to code socially • AdoptOpenJDK GitHub – For collaborative code review • LJC is now incorporated – Bank A/C will be opened and funds secured – Global JUG non-profit corporation? • Adopt OpenJDK will host build platforms, chef-server etc 24
  25. 25. Developers struggle to submit code • Adopt OpenJDK will investigate a living visualisation of forests – TBA • Adopt OpenJDK will host a webrev service – Allows irregular contributors a way to submit patches 25
  26. 26. Thanks for listening! • Need to get in touch? – Adopt OpenJDK (@adoptopenjdk) – Ben Evans (@kittylyst) – Martijn Verburg (@karianna) – Richard Warburton (@richardwarburto) • http://adoptopenjdk.java.net 26

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