switch to alternate approach for JRuby Thunks, more similar to what we
tree5f43b52dcd6e461d7740baa7b37e0c07a6750223
-rw-r--r-- 2837 Rakefile
drwxr-xr-x - ext
drwxr-xr-x - java
drwxr-xr-x - lib
drwxr-xr-x - test