JBoss - Commit Option A and Clustering

Commit Option A - I own the database. If you want your entities to be cache invalidated cross nodes in a cluster, you must update it in jboss.xml see
http://www.onjava.com/pub/a/onjava/2003/05/28/jboss_optimization.html?page=2

JBoss MySQL Connection Pool Usage

http://mysql.scarlet.be/tech-resources/articles/connection_pooling_with_connectorj.html

All available mime types

http://www.asahi-net.or.jp/en/guide/cgi/mimetype.html

Finding a jar for an import that cannot be resolved

You find yourself with the compilation error The import xxx.yyy.zzz.ABC cannot be resolved where is the jar that contains that class?

A simple way to find it out

use a search utility, search for a text within a *.jar that contains the text xxx/yyy/zzz/ABC you will find your jar ! :)