Transaction Management when stored procedure calls Java

[srichakrav chakrav]

We have current architecture as follows:-

1. A Stateless Session EJB calls Java Method A to perform business logic.
2. The Java Method A calls a Stored Procedure A to persist data to a database.
3. The Stored Procedure A calls again a Java Method B to perform some other business logic.

How can I make all three calls fall within the same transaction so that If anyone breaks in the flow the whole transaction will be rolled back. We are using Oracle 10g version.

Thanks,
SC