如何强制刷新可能缓存的值？

发布于 2024-08-26 07:43:42 字数 610 浏览 3 评论 0原文

我有以下存储库：

Public Class PageRepository
    Private Shared _pages As BLL.PageCollection

    Shared Function AllPages() As BLL.PageCollection
        If _pages Is Nothing Then _pages = new BLL.PageCollection(LOADALL)
        Return _pages
    End Function
End Class

我在 PageRepository.AllPages 上使用 LINQ 进行所有选择，并且还使用 Repository.AllPages.AddNew() 通过集合添加新实体。

当我调用 Repository.AllPages.Save() 时，数据存储在数据库中，但保留了 _pages 私有共享变量。

每次更新页面时我是否应该以某种方式强制刷新此变量？或者应该通过 Module / Static class 来完成，我的实现是否错误？

原文

I have the following Repository:

Public Class PageRepository
    Private Shared _pages As BLL.PageCollection

    Shared Function AllPages() As BLL.PageCollection
        If _pages Is Nothing Then _pages = new BLL.PageCollection(LOADALL)
        Return _pages
    End Function
End Class

I do all selects using LINQ on the PageRepository.AllPages, and I also Add new entities through the collection using Repository.AllPages.AddNew().

When I call Repository.AllPages.Save() the data is stored in the database, however the _pages private shared variable is maintained.

Should I somehow force a refresh of this variable everytime a page is updated? Or should this be done through a Module / Static class and is my implementation wrong?

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等往事风中吹 2024-09-02 07:43:42

当您执行保存时，您将使缓存失效。您应该在此时强制刷新，或者以某种方式使任何消费者的缓存过期。这取决于它的使用方式以及您如何设计架构。

您确定确实需要缓存吗？ SQL Server（和其他数据库）具有良好的缓存功能，并且 LINQ to SQL 的 LINQ dataContext 和实体框架具有可以利用的其他功能。简而言之，您是否尝试过使用

Public Class PageRepository

    Shared Function AllPages() As BLL.PageCollection
        Return new BLL.PageCollection(LOADALL)
    End Function

End Class

如果您有并且确实需要缓存，您可以将缓存推送到BLL吗？

When you're performing the save, you are invalidating the cache. You should force a refresh at that point or somehow expire the cache to any consumers. That depends how it's being consumed and how you designed your architecture.

Are you sure that caching is actually needed? SQL Server (and other DBs) have nice caching features and the LINQ dataContext for LINQ to SQL and Entity Framework have additional features that may be utilized. In short, have you tried using

Public Class PageRepository

    Shared Function AllPages() As BLL.PageCollection
        Return new BLL.PageCollection(LOADALL)
    End Function

End Class

If you have and you do need the caching, can you push the caching to the BLL?

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