What is the method of separate rollback of Spring transaction for loop

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@ Transactional (rollbackFor = Exception.class) public void aaa (List toDoIds) {for (String toDoId: toDoIds) {try {/ / inner layer new transaction, single transaction within for loop commit or roll back sissCommonService.aaa (toDoId);} catch (Exception e) {e.printStackTrace ();}

In the second generation code, the original method aaa () is called with this, that is, transaction methods are nested. After nesting, the nested methods will not have transactions. Therefore, I built a new public Service to solve the problem of transaction nesting, added transactions to the separately proposed methods, and worked out the transaction propagation mechanism as Propagation.REQUIRES_NEW, specific code.

@ Transactional (rollbackFor = Exception.class,propagation = Propagation.REQUIRES_NEW) public void updateOrderInfoPersonOutOrgan (String toDoId) throws Exception {}

Propagation.REQUIRES_NEW means that if the caller currently has a transaction, it suspends the transaction and restarts the transaction. After calling this method, the method opens the transaction separately, commits each time, and rolls back the exception separately when it encounters an exception. It is good that the external method receives the thrown exception and does not handle it, so that the internal and external transactions do not affect each other.

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