How do I do nested transactions in hibernate using only one connection?

[bowmanorchid]

Context of problem I want to solve: I have a java spring http interceptor AuditHttpCommunicationInterceptor that audits communication with an external system. The HttpClieant that does the communication is used in a java service class that does some business logic called DoBusinessLogicSevice.The DoBusinessLogicSevice opens a new transaction and using couple of collaborators does loads of stuff. Problem to solove: Regardless of the outcome of any of the operations in DoBusinessLogicSevice (unexpected Exceptions, etc) I want audits to be stored in the database by AuditHttpCommunicationInterceptor.Solution I used: The AuditHttpCommunicationInterceptor will open a new transaction this way:\[code\] TransactionDefinition transactionDefinition = new DefaultTransactionDefinition(TransactionDefinition.PROPAGATION_REQUIRES_NEW); new TransactionTemplate(platformTransactionManager, transactionDefinition).execute(new TransactionCallbackWithoutResult() { @Override protected void doInTransactionWithoutResult(TransactionStatus status) { // do stuff } });\[/code\]Everything works fine. When a part of DoBusinessLogicSevice throws unexpected exception its transaction is rolled back, but the AuditHttpCommunicationInterceptor manages to store the audit in the database.Problem that arises from this solution: AuditHttpCommunicationInterceptor uses a new db connection. So for every DoBusinessLogicSevice call I need 2 db connections.Basicly, I want to know the solution to the problem: how to make TransactionTemplate "suspend" the current transaction and reuse the connection for a new one in this case.Any ideas? P.S.One idea might be to take a different design approach: drop the interceptor and create an AuditingHttpClient that is used in DoBusinessLogicSevice directly (not invoked by spring) but I cannot do that because I cannot access all http fields in there.