Step-by-step to run the JMaglev demo

1. Pull from github:

   git clone git://github.com/fabiokung/clustered-jruby.git
   

2. Long time waiting, because terracotta-2.7.1 (vanilla) and jruby-complete (patched) are bundled.

3. Change to the project directory:

   cd clustered-jruby
   

4. Build it:

   mvn install
   

   (although mvn package is enough)

5. Change to the jmaglev demo directory:

   cd jmaglev
   

6. Start the terracotta server:

   lib/terracotta-2.7.1/bin/start-tc-server.sh
   

7. Open another two terminals

8. Run the simplified jirb inside them:

   cd clustered-jruby/jmaglev
   ./bin/jmaglev jmaglev.rb
   

9. Follow the demo. You will be able to share global variables among all jmaglevs:

   require 'hat'
   $hat
   require 'rabbit'
   $hat.put(Rabbit.new)
   

10. in the other terminal, try to see the magic hat contents:

    $hat