An alternative would be to use a service layer.

替代方法是使用服务层。

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One option is to place your validation logic in a service layer.

一个选择就是把验证代码放到“Service”层中。

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This is achieved by introducing a service layer into an enterprise architecture.

这是通过在企业体系结构中引入服务层来实现的。

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In fact as a service layer they are quite weak.

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With private clouds, enterprises maintain all the equipment and software, while seeking to offer resources through a virtualized service layer.

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In hybrid form, a private cloud can include data stored on premise or off, with a private Platform-as-a-Service middleware layer managing application data and enforcing data security.

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