究竟是什么“Propagation.REQUIRES_NEW"?意味着使用Spring事务管理? [英] what exactly "Propagation.REQUIRES_NEW" means using Spring transaction management?

问题描述

我对此事的困惑是，我们如何使用先前创建的事务?或者换句话说，一个事务可能与多少个线程相关?

my confusion related to this matter is that how we can use a previously created transaction? or in other words how many threads a transaction could be related to?

推荐答案

一个事务在 spring 中只能与一个线程相关.好吧，通过一些努力，您可以使它成为一个长期运行的事务，但这是一种反模式，afaik.

A transaction can be related to only one thread in spring. Well, with some effort you can make it a long-running transaction, but that's an anti-pattern afaik.

REQUIRES_NEW 表示每当程序流进入带注释的方法时，无论现有事务如何，都会启动一个新事务.

REQUIRES_NEW means that whenever the program flow enters the annotated method, a new transaction will be started regardless of any existing transaction.

REQUIRED 表示将重用现有事务，或者如果没有现有事务，则将启动新事务.

REQUIRED means that an existing transaction will be reused, or if there's no existing transaction a new one will be started.

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