Newbie: Install mysql gem? jdbc the only way?

Just installed jruby. Installed Rails 2.0.2. Verified with “gem
install list”.

“gem install mysql” fails with the following error.

JRuby limited openssl loaded. gem install jruby-openssl for full
Building native extensions. This could take a while…
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.

E:/jruby-1.2.0/bin/…/bin/jruby.bat extconf.rb install mysql
E:/jruby-1.2.0/bin/…/lib/ruby/1.8/mkmf.rb:7: JRuby does not support
native extensions. Ch
eck for alternatives. (NotImplementedError)
from E:/jruby-1.2.0/bin/…/lib/ruby/1.8/mkmf.rb:1:in `require’
from extconf.rb:1

Gem files will remain installed in
E:/jruby-1.2.0/lib/ruby/gems/1.8/gems/mysql-2.7 for ins
Results logged to

I am not a Java person. Just beginning with RoR. What is needed to
install a gem in the jruby environment?

A web search produced no useful info. It all referenced using a jdbc
version of mysql. Is this the only way to use mysql? I want this to be
simple, initially! :sunglasses:

jruby -S gem install activerecord-jdbcmysql-adapter

Many thanks!