Manik, Recall our conversation regarding adding a set of modified keys to tx context. You said how we can have "this set of keys updated by the TxInterceptor after a in-tx-scope completion of every write command". It seems that the best way to collect these keys is to add them in TxInterceptor#enlistWriteAndInvokeNext right where we add modifications to xaAdapter. And also the easiest way to lookup modified keys seems to be from ctx#getLookedUpEntries(). Traverse entries, get keys and copy them into a set in TransactionXaAdapter.