A scope annotation can be added to either the interface or implementation class definition. The Feature Pack for SCA supports stateless and composite scopes.

可以向接口或实现类定义添加范围注释。

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It is the only class where EJB operations are performed, and it holds the reference to the PhoneBookSession stateless session bean.

它是惟一一个执行ejb操作的类，并保存对PhoneBookSession无状态会话bean的引用。

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Listing 2 shows a stateless bean class.

清单2展示了一个无状态bean类。

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