![HOW CAN I USE IT?
rvm installjruby
rbenvinstalljruby-X.Y.Z
$ruby-v
jruby1.7.11(1.9.3p392)2014-02-2486339bbon
JavaHotSpot(TM)64-BitServerVM1.8.0-b132+indy[darwin-x86_64]
$ruby-e"puts'hello'"
hello](https://image.slidesharecdn.com/jruby-talk-vbalazs-26-140328155705-phpapp02/85/JRuby-talk-26-03-2014-vbalazs-5-320.jpg)
JRuby talk / 26.03.2014 / @vbalazs
- 1. WHAT IS JRUBY? ... AND WHY I LIKE IT :) /BalazsVarga @vbalazs
- 2. "JRuby is a100% Javaimplementation of the Ruby programming language. Itis Ruby for the JVM."
- 3. MIXED MODE ENGINE Interpreter + JRubyJIT AOT-compiled to Javabytecode JIT:JustInTimecompile AOT:Ahead-of-timecompile
- 4. JIT ALL THE THINGS (J.A.T.T ?) JIT:JustInTimecompiler
- 5. HOW CAN I USE IT? rvm installjruby rbenvinstalljruby-X.Y.Z $ruby-v jruby1.7.11(1.9.3p392)2014-02-2486339bbon JavaHotSpot(TM)64-BitServerVM1.8.0-b132+indy[darwin-x86_64] $ruby-e"puts'hello'" hello
- 6. HOW ABOUT WEBAPPS? Embedded servers mostlybased on Jetty, Tomcat, JBoss and Vertx (ex.: Puma, Trinidad, TourqueBox) run with the server from the project package in ajavaarchive (jar) and execute as ajavaapp Standard javaservers like Jetty, Tomcat, JBoss, GlassFish, WebLogic Phusion Passenger (>=4.0) :) Differentfeatures and performance butyou can easilyswitch between them.
- 7. PERFORMANCE JRuby: interpreted or AOTmode JVM: clientor server mode JIT:JustInTimecompiler AOT:Ahead-of-timecompiler
- 9. THREADS & CONCURRENCY Rubythread == Javathread == native thread No GIL Runtime is threadsafe (exceptsome core classes)
- 12. C EXTENSIONS, INCOMPATIBILITIES cannotrun native C extensions ActiveRecord-JDBC adapter (extension) FFI ftw FFI:Foreignfunctioninterface
- 13. FUTURE - TRUFFLE experimentalimplementation usingGraaland Truffle Graalis anew implementation of aJITcompiler in the OpenJDK JVM expose VM functionalityviaJavaAPIs Truffle: AST(AbstractSyntax Tree) interpretingframework SimonyiConference 2014 15 April2014 http://konferencia.simonyi.bme.hu
- 14. FUTURE DEVELOPMENT https://github.com/jruby/jruby/wiki/SuccessStories Sponsors over the years: Sun Microsystems ThoughtWorks Engine Yard RedHat(from 2012)
- 15. SUMMARY Disadvantages Slowlyfollows the Rubylang. Incompatibilitywith C exts Fewer developer Advantages Integration with Java Performance Brightfuture
- 16. QUESTIONS?