XRubyEnjoy Ruby on JVM

Ye Zheng

http://dreamhead.blogbus.com

Agenda

What is XRuby XRuby Architecture XRuby Jump Start More on XRuby

Agenda

What is XRuby XRuby Architecture XRuby Jump Start More on XRuby

What is XRuby

XRuby is the first Ruby to Java compiler which compiles Ruby source code (.rb) to Java bytecode (.class).

XRuby.rb .class

XRuby current status

The latest version is 0.3.0. test::unit works. XRuby debugger provided Java to Ruby binding annotation. Runs most benchmark faster than ruby 1.8.

6.

Two Ways to JVM(I)

Interpretationcurrent C Ruby wayeasy to portneeds interpretation engineslow

RubyScript

Parser AST

Two Ways to JVM(II)

Compilationneeds more explorations uses JVM as execution engineprotects source code fast

RubyScript

Compiler .class

Why Compilation is Faster

Compilation is faster than interpretation

JVM JVM

Interpretation Engine

Ruby Script

Ruby Script

Interpretation Compilation

Misunderstandings

It erases dynamic language features.Dynamic structure written in Java is

developed to support dynamic language features

It maps Ruby class to Java class directly.Ruby class is a dynamic language structure,

and it is different from Java class which is a static structure

Agenda

What is XRuby XRuby Architecture XRuby Jump Start More on XRuby

XRuby Architecture (overview)

XRuby

Compiler Runtime

Parser

Codegen

Codedom

Lang

Builtin

Java Support

XRuby Architecture (compiler)

Parser.rb .classTree

ParserCodeGen

ASTCodeDom

Antlr ASM

XRuby Compiler

XRuby Architecture (runtime)

Dynamic Language Support

Builtin Java Support

XRuby Runtime

Agenda

What is XRuby XRuby Architecture XRuby Jump Start More on XRuby

XRuby Jump Start (Ruby code)

class MyClass

def say_hello_three_times

3.times { puts "hello"}

end

end

MyClass.new.say_hello_three_times

XRuby Jump Start (compile and run)

Compile java -jar xruby-0.3.0.jar -c demo.rb

Run java -jar demo.jar

Outputhello

hello

hello

XRuby Jump Start (builtin)

@RubyLevelClass(name="Array")public class RubyArray … { … @RubyLevelMethod(name="length") public RubyFixnum length() { return ObjectFactory.createFixnum(this.array_.size()); } …}

XRuby Jump Start (reference)

XRuby Hacking Guide is a good start to understand XRuby.

Ruby Hacking Guide is a good reference to Ruby implementation.

Builtin is a good start and reference to XRuby code.

Agenda

What is XRuby XRuby Architecture XRuby Start-up More on XRuby

XRuby’s Future

XRuby 0.4.0Pass all C Ruby tests (Milestone) Compile multiple ruby scripts into one jar Implement more builtin libraries Improve performance

Long TermMake Ruby on Rails work Upgrade Antlr to 3.0

Contribution to XRuby Principles

Every contribution is welcome.Every attempt is encouraged.

ApproachesUse XRubyReport bugsCommit patches.Join mailing list to share ideas.Become a XRuby project member.…

Enjoy XRuby

Enjoy development of a compiler. Ruby is a elegant language. Work with JVM. Understand dynamic language internals. Contribute to open source. We can grow with XRuby since it’s new.

For More Information

Homepage http://www.xruby.com

Project Homepage http://code.google.com/p/xruby/

Project Blog http://xruby.blogspot.com

Project Group http://groups.google.com/group/xruby-devel

Welcome to XRuby