除了公开对管理器的引用之外，该基类还会在创建和销毁通道时通知管理器。

In addition to exposing a reference to the manager, the base class also notifies the manager when channels are created and destroyed.

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使用它通知对象管理器会话范围已经结束(或即将结束)，应该释放对应的对象。

Use it to notify object managers that a session scope has ended (or is about to end) and to release the corresponding objects.

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使用它通知对象管理器应用程序范围已经结束，应该释放对应的对象。

Use it to notify object managers that an application scope has ended and to release the corresponding objects.

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