I read chapter 8 with great interest - have been looking into how to integrate hibernate into existing solutions for some weeks now.

Each hibernate factory instance is already placed in a JNDI location (this is deployment of the hibernate MBean via .sar files under jboss).

The HibernateUtil class singleton implementation looks very usable - and in fact works well in some of the applications I want to use it in. However - some of the applications need more than one datasource - and if I have understood it correctly this means one HibernateFactory per datasource.

Just wondered if the authors/readers had any thoughts - you could extend the singleton so that it took jndiName as parameter - but then every call to each method (getSession) etc would need the same. Or you could use the singleton to generate a non singleton (sort of a HibernateFactoryFactory). Was just interested in how folk would approach this?