jsr223 allows embedding jruby code in java.
Unfortunately, at least on Debian lenny, setup requires some work.
First of all, be sure to install java1.6, for example with sun-java6-jdk package.
Then two more downloads are required:
* jruby, for instance jruby1.1.6
* jruby-engine-1.1.6.zip
Version of jruby engine must match jruby version.
Unpack Jruby, define $JRUBY_HOME to the expanded directory and have PATH=$PATH:$JRUBY_HOME/bin.
Unpack jruby-engine-*.zip.
Include in classpath jruby.jar and jruby-engine.jar from the /lib dir of the unpacked tarball.
Compile javacode as usual with javac; to run code, it could be necessary to add a -cp .:./jruby.jar:./jruby-engine.jar switch to java.
It should be possible to use jsr223-engines tarball instead of jruby-engine-*, but I tried with no luck. jruby1.0 is a deb package, but installing it didn't help, and I feared it could introduce path problems so I removed it.
