Awesome
Rjb is Ruby-Java bridge using Java Native Interface.
The Ruby Kaigi 2010
Presentation on Rjb.
A short introduction in English.
Some examples in Japanese, but the source code is clear for everybody.
How to install
You need to install Java2 sdk, and setup JAVA_HOME enviromental
varible except for OS X. I assume that OS X's JAVA_HOME is reported
by calling /usr/libexec/java_home.
This done please proceed with:
ruby setup.rb config
ruby setup.rb setup
# (in Unix)
sudo ruby setup.rb install
or
# (in win32)
ruby setup.rb install
How to test
On Windows based machines:
cd test
ruby test.rb
On Unix based machines plese see test/readme.unix. You need to set
LD_LIBRARY_PATH environmental variable to run rjb.
Notice for opening non-ASCII 7bit filename
If you'll plan to open the non-ascii character named file by Java class through Rjb, it may require to set LC_ALL environment variable in your script.
For example in Rails, set above line in production.rb as your environment:
ENV['LC_ALL'] = 'en_us.utf8' # or ja_JP.utf8 etc.
cf: https://bugs.java.com/bugdatabase/view_bug.do?bug_id=4733494 (Thanks Paul for this information).