你如何根据HTTP请求更改NHibernate的连接字符串？

public interface IConnectionStringProvider
{
    string GetConnectionString();
    void SetConnectionString(string connectionString);
}

public class ConnectionStringProvider : IConnectionStringProvider
{
    private string _connectionString;

    public string GetConnectionString()
    {
        return _connectionString;
    }

    public void SetConnectionString(string connectionString)
    {
        _connectionString = connectionString;
    }
}

public void UpdateConnectionString(string connectionString)
{
    var connectionStringProvider = new ConnectionStringProvider();
    connectionStringProvider.SetConnectionString(connectionString);

    var configuration = new Configuration();
    configuration.SetProperty(NHibernate.Cfg.Environment.ConnectionString, connectionStringProvider.GetConnectionString());
    // 其他 NHibernate 配置
    var sessionFactory = configuration.BuildSessionFactory();
}