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JTA managed transactions

 
Greenhorn
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Hi,

I am trying to understand managed transactions and how they are related to XA.

My understanding is that XA resources, such as data sources, allow 2 phase commit where multiple data sources are involved in the same transaction. This must be managed with a JTA transaction manager.

But where only a single data source is involved, there is no need for XA data sources.

Is there still a need for a JTA transaction manager?

Is a non-JTA transaction manager still able to manage transactions as they are propagated through the application?

I am using JBoss 5 with Spring 3: this means Spring transaction annotations and Spring JtaTransactionManager.

Any help appreciated,

Kato
 
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