Chapter 6 : Connections and Transactions Item 60: How to Delay Connection Acquisition Until It’s Really Needed DelayConnection Item 61: How @Transactional(readOnly=true) Really Works TransactionalReadOnlyMeaning TransactionId Item 62: Why Spring Ignores @Transactional WhyTransactionalIsIgnored Item 63: How to Set and Check that Transaction Timeout and Rollback at Expiration Work as Expected TransactionTimeout Item 64: Why and How to Use @Transactional in a Repository Interface TransactionalInRepository AddendaForTransactional : @Transactional 관련 추가 예제