nHibernate、ASP.NET MVC、s#arp 架构和多个相同的数据库

发布于 2024-09-30 03:25:07 字数 1563 浏览 4 评论 0原文

我们目前正在开发一个基于 NHibernate 和 ASP.NET MVC 以及 SQL Server 后端的应用程序。由于我对 NHibernate 相当陌生，因此我正在尝试了解最佳实践。

我们的应用程序要求每个用户都有自己的 SQL Server 数据库。这些数据库都具有相同的结构。

我们的客户通过客户代码进行标识，例如 1500。

我们为 nHibernate 提供了一个自定义连接提供程序，我们已在 nServiceBus 后端服务中使用它：

public class DynamicConnectionProvider : DriverConnectionProvider
{
    public override IDbConnection GetConnection()
    {
        IDbConnection conn = Driver.CreateConnection();

        try
        {
            var messageExecutionContext = ServiceLocator.Current.GetInstance<ITTTContextProvider>().CurrentContext;
            if (messageExecutionContext.CustomerId == 0)
            {
                conn.ConnectionString = ConfigurationManager.ConnectionStrings["dev"]
                    .ConnectionString;
            }
            else
            {
                conn.ConnectionString = ConfigurationManager.ConnectionStrings["default"]
                    .ConnectionString
                    .FormatWith(messageExecutionContext.CustomerId);
            }

            conn.Open();
        }
        catch (Exception)
        {
            conn.Dispose();
            throw;
        }
        return conn;
    }
}

此连接提供程序检查上下文对象中的客户代码并相应地设置连接字符串。

我们计划提供一个 HttpContext 感知的 ITTTContextProvider。为此，我有两个问题：

我们如何从 url 中检索客户代码并将其放入每个请求的上下文对象中？当我们使用以下路线时？
/{customercode}/{controller}/{action}/{id}
这种连接到多个相同数据库的方法是否有效，或者更好的做法是为每个客户数据库构建一个会话工厂？

原文

We are currently developing an application based on NHibernate and ASP.NET MVC and a SQL Server backend. Since I'm fairly new to NHibernate, I'm tryig to understand best practices.

Our application requires every user to have it's own SQL Server database. These databases all have an identical structure.

Our customers are identified with a customercode, e.g. 1500.

We've come up with a custom connection provider for nHibernate, which we already use in our nServiceBus backend services:

public class DynamicConnectionProvider : DriverConnectionProvider
{
    public override IDbConnection GetConnection()
    {
        IDbConnection conn = Driver.CreateConnection();

        try
        {
            var messageExecutionContext = ServiceLocator.Current.GetInstance<ITTTContextProvider>().CurrentContext;
            if (messageExecutionContext.CustomerId == 0)
            {
                conn.ConnectionString = ConfigurationManager.ConnectionStrings["dev"]
                    .ConnectionString;
            }
            else
            {
                conn.ConnectionString = ConfigurationManager.ConnectionStrings["default"]
                    .ConnectionString
                    .FormatWith(messageExecutionContext.CustomerId);
            }

            conn.Open();
        }
        catch (Exception)
        {
            conn.Dispose();
            throw;
        }
        return conn;
    }
}

This connection provider checks the customer code in a context object and sets the connectionstring accordingly.

We are planning to provide a HttpContext aware ITTTContextProvider. For this I have two questions:

How can we retrieve the customer code from the url and put it into our context object for every request? when we use the following route?
<main-site-url>/{customercode}/{controller}/{action}/{id}
Is this method of connecting to several identical databases valid or is it better practice to construct a sessionfactory foreach customer database?

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情感失落者 2024-10-07 03:25:07

为了获取您需要访问路线数据的 customercode，我的第二个建议的内容

HttpContextBase currentContext = new HttpContextWrapper(HttpContext.Current); //ServiceLocator.Current.GetInstance<ITTTContextProvider>().CurrentContext; 
RouteData routeData = RouteTable.Routes.GetRouteData(currentContext);  
var cusomterCode = routeData.Values["customercode"]

是不要将此代码放在上面提供的代码片段中。把它抽象出来。请参阅 Joshua 的回答强调了我正在考虑的方法。

对第二个问题确实没有帮助，实际上对提到的两个框架都不熟悉。

In order to get the customercode you need to access the route data, something along the lines of

HttpContextBase currentContext = new HttpContextWrapper(HttpContext.Current); //ServiceLocator.Current.GetInstance<ITTTContextProvider>().CurrentContext; 
RouteData routeData = RouteTable.Routes.GetRouteData(currentContext);  
var cusomterCode = routeData.Values["customercode"]

My second suggestion would be not to put this code in the above snippet provided. Abstract it away. See Joshua's answer which highlights the approach I am thinking of.

Can't really help on the second question, actually not familiar with both frameworks mentioned.

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