WCF UserNamePasswordValidator缓存

Question

我没有运气浏览互联网，我试图找到一种合适的方法来缓存服务端的用户名和密码令牌，所以每次连接到服务时我都不必创建数据库连接。

这就是我想要实现的目标：

public class ServiceAuth : UserNamePasswordValidator
{
    public override void Validate(string userName, string password)
    {
        var user = Repository.Authenticate(userName, password);

        if (user != null)
        {
            // Perform some secure caching
        }
        else
            throw new FaultException("Login Failed");
    }
}

使用UserNamePasswordValidator在C＃4.0 WCF中验证凭据时是否可以使用缓存？

如果是这样，有人可以给我一些关于如何实现这一目标的线索吗？

Answer 1

我想请求超级用户不要删除答案，因为这可以帮助其他想要找到问题解决方案的人。！

我使用键值对Dictionary集合实现了以下CUSTOM安全管理器以进行缓存。希望这有帮助

public class SecurityManager : UserNamePasswordValidator
{
    //cacheCredentials stores username and password
    static Dictionary<string, string> cacheCredentials = new Dictionary<string, string>();
    //cacheTimes stores username and time that username added to dictionary.
    static Dictionary<string, DateTime> cacheTimes = new Dictionary<string, DateTime>();

    public override void Validate(string userName, string password)
    {
        if (userName == null || password == null)
        {
            throw new ArgumentNullException();
        }
        if (cacheCredentials.ContainsKey(userName))
        {
            if ((cacheCredentials[userName] == password) && ((DateTime.Now - cacheTimes[userName]) < TimeSpan.FromSeconds(30)))// &&  timespan < 30 sec - TODO
                return;
            else
                cacheCredentials.Clear();
        }
        if (Membership.ValidateUser(userName, password))
        {
            //cache usename(key) and password(value)
            cacheCredentials.Add(userName, password);
            //cache username(key), time that username added to dictionary 
            cacheTimes.Add(userName, DateTime.Now);
            return;
        }
        throw new FaultException("Authentication failed for the user");       
    }
}