How to wrap multiple JPA EntityManager persist/merge into single transaction

Question

I need to update several tables in a single transaction.

Currently, I have the following structure in my code:

(pseudo-code)

process(updateList, mainObject);  // returns list of objects and main business object to persist/update
persistTable1(mainObject);  // table 1

int objectIndex = 0;
while(objectIndex < updateList.size()) {
    persistTable2(updateList[objectIndex]); // table 2
    objectIndex++;
}

Question: How do I wrap the persistTable1 (which will always get called once - no matter what), and the persistTable2 call (which will get called 0 to n times) into a single transaction, so that if any persist/merge fails then everything will get rolled-back?

The persist/update code is using JPA EntityManager.

Answer 1

You can use the transactional context in the method caller.

@Transactional(propagation = Propagation.REQUIRES_NEW)