gistfile1.txt

- Install Bundler
> jruby -S gem install bundle --no-ri --no-rdoc

- Create and Edit Gemfile
> cd [some directory to install gems]
> jruby -S bundle init
> vim Gemfile

# A sample Gemfile
source "http://rubygems.org"

# gem "rails"
gem "dm-core"
gem "dm-timestamps"
gem "dm-sqlite-adapter"

- Install gems to vendor directory
> jruby -S bundle install --path=vendor

- Write Java code with JRuby embed

        String basepath = System.getProperty("user.dir");
        ScriptingContainer container = new ScriptingContainer(LocalContextScope.SINGLETHREAD);
        container.setHomeDirectory("/Users/yoko/Tools/jruby-1.5.3");      // needs for "require 'rubygems'"
        System.out.println("jrubyhome: " + container.getHomeDirectory());

        // tell jruby where the Gemfile is located.
        container.runScriptlet("ENV['BUNDLE_GEMFILE'] = \"" + basepath + "/build/ruby/Gemfile\"");
        container.runScriptlet("require 'rubygems'");
        container.runScriptlet("require 'bundler/setup'");
        container.runScriptlet("Bundler.require");
        container.runScriptlet("require 'dm-core'");
        container.runScriptlet("require 'dm-timestamps'");
        container.runScriptlet("DataMapper.setup(:default, 'sqlite::memory:')");