Configure Tomcat Datasource in Hibernate

< ?xml version="1.0">
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

< hibernate-configuration>
  < session-factory name="java:comp/env/hibernate/SessionFactory">
    < property name="connection.datasource">jdbc/myDataSource</property>
    <property name="dialect">
        org.hibernate.dialect.MySQLDialect
    </property>
    <mapping resource="com/manning/hq/ch03/Event.hbm.xml"/>
  </session-factory>
</hibernate-configuration>