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Fujikawa-san on JRuby at Ninjava

I attended a talk by Kouichi Fujikawa at the June Ninjava meeting.

Was an excellent warm-up before the RubyKaigi 2008.

Sorry for the hashed post, “live blogging” before the post-talk beers.

– Fujikawa-san is working for a company developing finance derivatives trading systems
– had the chance to work with ThoughtWorks China
– went to JavaOne 2008
– met Thomas E Enebo, Charles Oliver Nutter, Nick Sieger, Ola Bini

– JRuby supported by Sun Microsystems (especially Tim Bray) and ThoughtWorks
– JRuby is ‘performant’
– good way to get Ruby into the enterprise

– small demo… (classical JFrame demo)

– leveraging JDBC for database support (many drivers, drivers with connection pooling)
– integration of Java libraries (new systems and legacy services)
– at JavaOne08, Ola Bini presented a SpellCheck java library used in a JRuby on Rails application
– Warbler : turns a Rails app into a Java .war
– JRuby Rack (included in Warbler) integration of the Rack Ruby (low level) web framework

– next some slides courtesy of Nick Sieger
— may JRuby interpreters in 1 JVM
— Glassfish [web] app server
— servlet context initialization creates JRuby runtimes and pool them (acquire/dispatch/release)

– more information :
http://jruby.org
— book by Ola Bini “Practical JRuby on Rails
http://d.hatena.ne.jp/fujibee (japanese, about JRuby and Haskell)

– then questions from the audience :
— Zev asking if threads do really magically make things better (more scalable), answer by Lars was mainly about JRuby being able to leverage ‘native’ threads thus multicore
— questions about JRuby and ObjectSpace (various tries between jirb and irb do follow)

The talk by Fujikawa-san was followed by a presentation of iKnow! by Zev Blut :

– “developing and scaling iKnow!”
– (stopping here as he will present this talk on Sunday at the RubyKaigi)

Written by John Mettraux

June 19, 2008 at 12:00 pm

Posted in java, jruby, ninjava, opensource, ruby

2 Responses

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  1. Sounds interesting, too bad I couldn’t make it…

    The announcement also mentioned that Sakai-san was going to talk about some Adobe/Macromedia technologies and his experience in maintaining a high volume web site. Did he get to present this evening?

    Dimitar Dimitrov

    June 19, 2008 at 3:07 pm

  2. Hello Dimitar,

    unfortunately he couldn’t make it to Shibuya, so Zev stood up and rehearsed his RubyKaigi talk in front of us. Only Java and [J]Ruby tonight.

    Too bad you weren’t with us, cheers,

    John

    John Mettraux

    June 19, 2008 at 3:10 pm


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