Introduction to JRuby

1. “Intro”  to  JRuby   Jay  McGaffigan  
2. Me,  Myself,  and  I   •  Developer  at  Decision  Resources  Group   •  Twi@er:  @hooligan495  
3. It’s  ruby   •  Installs  with  RVM   •  Download  a  distribuIon   •  Even  on  Windows  
4. Rails   •  Yep…  
5. Some  things  are  different  
6. Not  a  Unified  Gemset   •  ImageMagick  vs  Rmagick   •  Cextensions  aren’t  fully  supported  (never  will   be  considered  ProducIon)   •  Might  have  to  write  a  java  extension  
7. Deploying   •  It’s  different  but  not  “new”  
8. Java  integraIon   •  Calling  Java  Libraries     •  Give  Java  a  Ruby  syntax  
9. Things  to  be  aware  of   •  Startup   •  JVM  tuning  and  warmup   •  Forking  processes   •  Threading  
10. Why  Did  we  Choose  JRuby   •  Ruby  in  the  “enterprise”   •  Selling  a  product   •  Fit  into  customers  “labs”  
11. Resources   •  h@p://www.jruby.org   – Ge_ng  started   – Wiki   – IRC   Tom  Enebo,  Charles  Nu@er,  Nick  Sieger,  and  others   whose  names  I  forget  are  always  up  for  answering  a   quesIon  
12. Always  looking  for  help   •  Grab  a  bug  and  work  to  fix  it   •  Grab  a  gem  (rcov)  and  ensure  Jruby   compaIbility