Imparting transactional semantics to object-oriented components required an extension of the TPM model, in which transactions are instead defined in terms of invoking methods on transactional objects.

将事务性语义告知面向对象的组件要求对TPM模型进行扩展—在这个模型中事务是按照事务性对象的调用方法定义的。

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It can choose to associate the transactional work to be performed directly with its XAResource object.

它可以选择把要执行的事务性工作直接与它的XAResource对象关联起来。

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One caveat here is that service object local calls do not go through the transactional proxy, and thus will always occur in the transaction context of the caller.

这里需要注意的一点在于，服务对象本地调用并不经过事务代理，因此将始终在调用者的事务上下文中进行。

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