How to connect from JRuby to a MySql database?

[Ronny]

Could someone kindly sketch an example (or point me to a related
website), how
to query a MySql database from JRuby?

I guess there are several possibilities available (via JDBC, since
JRuby is based on
Java, and maybe using some Ruby library too, since JRuby is intended
to be compatible
to Ruby), but I didn't find any documentation for it on the web.

Ronald