I read that EJB 2.x spec does not support nested transactions. But logically think we can call an EJB method that has REQUIRES_NEW txn attribute from another EJB method that acutally started a transaction Isn t this a valid case. If valid isn t this what is called nested transactions.
请允许我指出,我在这里没有什么东西。
<代码>REQUIRES_NEW 传播是指:
Create a new transaction, suspend the current transaction if one exists.
因此,这些交易不会被冻结——第一个交易被暂停,被拖走,并且开始新的、无关的交易。
您并不真正需要确定交易本身,只是需要确保每次通过交易边界时,你继承现有的交易(或开始新的交易)。 默认传播<代码>PROPAGATION_REQUIRED通常足够。
有趣的是,JDBC 3.0的确引入了冻结交易的概念,但EBJ的光谱尚未赶上。
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