The recommendation is that you place all of your database logic in a separate repository layer.

推荐做法是把所有有关数据库的逻辑分离出来，放在一个repository层中。

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Here fetching strategy decision management is kept out side the lower level service or repository layer.

这里我们将对抓取策略的管理放在了底层服务和Respository层之外。

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By this we can use the same service and repository layer APIs to satisfy different business use case requirements.

这样我们就可以使用相同的Service和Repository层API来满足各种不同的业务规则了。

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