rollback() and setRollbackOnly()

[Mike Yu]

Hi,
There are two methods to roll back a transaction in the javax.transaction.UserTransaction interface.
It seems to me that both rollback() and setRollbackOnly() will roll back the transaction. What is the difference between them, and when shold I use rollback() and when setRollbackOnly()?


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Thanks,
Mike

[Marco Barenkamp]

Hi,
if you use the UserTransaction (Bean Managed Transaction, not possible with Entitiy Beans), you can roolback this transaction
using rollback().
If you use Container Managed Transaction ( Session and Entity)
you have to mark the Transaction as to be rollbacked using
setRollbackOnly() in order to rollback this transaction.
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Marco Barenkamp
____________________________________________
L M I N T E R N E T S E R V I C E S AG
Senior Trainer & Architect,
BEA Certified Enterprise Developer
Sun Certified Programmer for the Java2 Platform
Sun Certified Web Component Developer for the Java2 Platform
Sun Certified Developer for the Java 2 Platform
Sun Certified Enterprise Architect for the Java 2 Platform Enterprise Edition (PI)

[Mike Yu]

Hi Marco,
Your reply is really usefull. However, I have a further question about this issue:
In a Container-Managed transaction, we have to call setRollbackOnly() method on an object of EJBContext interface. The setRollbackOnly() of the UserTransaction interface is not allowed in a Container-Managed transaction. Then, what is The setRollbackOnly() of the UserTransaction interface uesed for?

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Thanks,
Mike