JpaTransactionManager.java 文件源码

@Override
protected void doRollback(DefaultTransactionStatus status) {
    JpaTransactionObject txObject = (JpaTransactionObject) status.getTransaction();
    if (status.isDebug()) {
        logger.debug("Rolling back JPA transaction on EntityManager [" +
                txObject.getEntityManagerHolder().getEntityManager() + "]");
    }
    try {
        EntityTransaction tx = txObject.getEntityManagerHolder().getEntityManager().getTransaction();
        if (tx.isActive()) {
            tx.rollback();
        }
    }
    catch (PersistenceException ex) {
        throw new TransactionSystemException("Could not roll back JPA transaction", ex);
    }
    finally {
        if (!txObject.isNewEntityManagerHolder()) {
            // Clear all pending inserts/updates/deletes in the EntityManager.
            // Necessary for pre-bound EntityManagers, to avoid inconsistent state.
            txObject.getEntityManagerHolder().getEntityManager().clear();
        }
    }
}