XA transactions

[Mark Volkmann]

I'm using JBoss, Spring transactions, iBATIS and Spring DAOs  
generated by Abator. I need to global transactions that span  
operations in two databases. When I specify the <transactionManager>  
element in my SqlMapConfig.xml file, should I use type="JTA" where  
iBATIS will actively manage transactions or type="EXTERNAL" where  
iBATIS will allow Spring to manage transactions?