JRuby

 RubyOnRails A Taste of Honey(for the enterprise)
JRuby guys

JRuby 101
Ruby for JVM
alternative language impl.
helping the world better understading Ruby

not
pllute or fork Ruby
admission that Java sucks
every problem
alter Ruby add incompatible
slow


But Is's Java Too
include Java
import java.lang.ArrayList
list = ArrayList.new
list.each {|f| f.set_size(200,200) }

include RubyGems Rake Rspec
mongrel support
rails works


unicode
RUby's thread API
thread pooling

pain point for Rails?

basic

gems

commang-line

basic server

different

db support

pure mysql

faster & easy jdbc

JNDI for connection pooling

mysql 100% support

oracle 지원도 노력중 금방 될 것?

diff #2

No Native Extension (C Based)

But port avaliable ex.mongrel

mongrel, hpricot, db support

rmagic in progress

diff3 -> Commandline perf.

java slow (x)  except startup

don't expect stellar CLI perf.

Full demo!

jruby -S gem install rails -y

if RUBY_PLATFORM =~ /java/

데모가 지루하다. Rails 개발과 똑같기 때문에!

goldspike plugin

jruby -S rake war:standalone:create

glassfish에 잘 deploy되는 모습

glassfish-java.gem
mongrel처럼 glassfish를 사용할 수 있다.

Migration can be done

Native Extension

equivalent java lib

port
wrap

deployment option

mongrel not 추천

war file -> JMS Persistence, Transaction, Scales great

Grizzly/GlashFish v3

Java Lib from Rails

Rome Java Feed 라이브러리를 쓰는 Demo