要成功添加和使用某个贡献包，域管理器和运行应用程序的节点都必须能够访问该贡献包，因为它们需要在运行时加载这些构件。
For a contribution to be successfully added and used, it has to be accessible to both the domain manager and the nodes that run the application, as they need to load these artifacts at run time.
事务管理器在运行时加载XA开关结构。
The transaction manager loads the XA switch structure at run time.
最简单的方法是让通道出口类可用于整个应用服务器运行时加载，向应用服务器类路径添加类即可实现。
The simplest approach is to make the channel exit classes available for loading by the entire application server runtime, which is possible by adding the classes to the application server class path.
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