Handling Transaction in Stateful Session Bean

Question

I wrote a public method like public void doTransaction()
it will call 2 private method, like: methodA and methodB
Both private methods have db accesss statement and will update the db. They got different db connection and will close the connection when method call finished.
How to include them to one transaction? I want to be able to rollback the job of the first method when I catch exception thrown by the second method.
I tried simply define transaction type of the public method to be Container and Required. But it doesn't work, the first method doesn't rollback. Of course I can let the 2 private methods share a same connection and commit after finishing calling them. But how if they are in different DB?

Answer 1

Ok... Here it goes...
You can do it in the following manner.
As you said you have got 2 private methods doing d/b updates and these are called from a public method.
Stateful session beans since associated with a client across methods, you can take advantage of it. Write your own user defined transaction.
Begin the transaction scope in your public before calling the 1st private method. Call the 2 methods in a try block. Once you are done with these methods, you can commit and end the transaction. If you get any exception, rollback the transaction in the catch block. Otherwise if u get any exception in the 2nd method, you can rollback the transaction there itself.
Stateful session beans lets u allow to spawn the bean managed transaction across methods. you can begin your transaction in one method and end it in a differnt method or you can end the transaction after calling the methods.
The problem you are dealing with can typically very well handled by writing bean managed transaction.
Hope this helps. If you need anymore clarity on my solution, please let me know.
-amit