将静态类重构为多个实现

Question

我正在使用https://blog.falafel.com/working-system-runtime-caching-memorycache/

所述的缓存项目

但是我需要开发这个类的一些实现，它们在ConsentDataContext项中使用不同的表。

此类是静态的，因此我需要将其更改为单例，然后从定义了GetItem和AddOrGetExisting方法的抽象继承。或者创建两个单独的类并使用反射来返回正确的实例。

解决这个问题的最佳方法是什么？

实施1

public static class Consent1Cache
{
    private static MemoryCache _cache = new MemoryCache("ConsentType1Cache");

    public static object GetItem(string key)
    {
        return AddOrGetExisting(key, () => InitItem(key));
    }

    private static T AddOrGetExisting<T>(string key, Func<T> valueFactory)
    {
        var newValue = new Lazy<T>(valueFactory);
        var oldValue = _cache.AddOrGetExisting(key, newValue, new CacheItemPolicy()) as Lazy<T>;
        try
        {
            return (oldValue ?? newValue).Value;
        }
        catch
        {
            // Handle cached lazy exception by evicting from cache.
            _cache.Remove(key);
            throw;
        }
    }

    public static string InitItem(string consentNumber)
    {
        using (DLL.ConsentDataContext db = new DLL.ConsentDataContext())
        {
            return db.vw_ConsentType1.Where(x => x.ConsentNumber == consentNumber).Select(c => c.ConsentNumber + " - " + c.Proposal).FirstOrDefault();
        };
    }
}

实施2

public static class Consent2Cache
{
    private static MemoryCache _cache = new MemoryCache("ConsentType2Cache");

    public static object GetItem(string key)
    {
        return AddOrGetExisting(key, () => InitItem(key));
    }

    private static T AddOrGetExisting<T>(string key, Func<T> valueFactory)
    {
        var newValue = new Lazy<T>(valueFactory);
        var oldValue = _cache.AddOrGetExisting(key, newValue, new CacheItemPolicy()) as Lazy<T>;
        try
        {
            return (oldValue ?? newValue).Value;
        }
        catch
        {
            // Handle cached lazy exception by evicting from cache.
            _cache.Remove(key);
            throw;
        }
    }

    public static string InitItem(string consentNumber)
    {
        using (DLL.ConsentDataContext db = new DLL.ConsentDataContext())
        {
            return db.vw_ConsentType2.Where(x => x.ConsentNumber == consentNumber).Select(c => c.ConsentNumber + " - " + c.Proposal).FirstOrDefault();
        };
    }
}