Hi,
I found this declaratiorn in seam docs:

<components xmlns="http://jboss.com/products/seam/components"
 xmlns:persistence="http://jboss.com/products/seam/persistence"

 <persistence:managed-persistence-context name="customerDatabase"
 persistence-unit-jndi-name="java:/customerEntityManagerFactory"/>

 <persistence:managed-persistence-context name="accountingDatabase"
 persistence-unit-jndi-name="java:/accountingEntityManagerFactory"/>

</components>

I understand that this enable to use 2 em's for two different db.
Let's think I got login page and dropdown list to choose db like :
db 1 , db 2, how to manage that?

Do I need to declare Two differend em in my source code? or maybe is way to do it dynamically?

Can anyone show me code how to do it?