/// <summary>
/// 将枚举转换为键值对集合
/// </summary>
/// <param name="enumType">枚举类型</param>
/// <returns>key:枚举name,值:枚举value</returns>
public async static Task<Dictionary<int, string>> EnumToDictionary(this Type enumType)
{
if (!enumType.IsEnum)
{
//传入的不是枚举
throw new AggregateException();
}
Array enumValueArray = Enum.GetValues(enumType);
string cacheKey = enumType.Name + "_EnumToDictionary_cache";
AsyncThreadSafeObjectCache<Dictionary<int, string>> cache = new AsyncThreadSafeObjectCache<Dictionary<int, string>>(MemoryCache.Default, TimeSpan.FromSeconds(120));
Dictionary<int, string> enumDict = await cache.GetAsync(cacheKey, () =>
{
enumDict = new Dictionary<int, string>();
foreach (var enumValue in enumValueArray)
{
int key = Convert.ToInt32(enumValue);//value值
string value = Enum.GetName(enumType, enumValue).InnerGetDescription(enumType);
enumDict.Add(key, value);
}
cache.Set(cacheKey, enumDict);
return Task.FromResult(enumDict);
});
return enumDict;
}
public async Task<GetCategoryOutput> GetAllByTaxonomy(TaxonomyEnum taxonomy)
{
string cacheKey = "GetAllByTaxonomy_"+Enum.GetName(typeof(TaxonomyEnum), taxonomy);
//创建缓存对象
AsyncThreadSafeObjectCache<GetCategoryOutput> cache =
new AsyncThreadSafeObjectCache<GetCategoryOutput>(System.Runtime.Caching.MemoryCache.Default, TimeSpan.FromSeconds(120));
GetCategoryOutput output = await cache.GetAsync(cacheKey, async () =>
{
var tagCategory = await _categoryRepository.GetAllListAsync(w => w.Taxonomy == taxonomy);
output = new GetCategoryOutput
{
CategoryCollection = Mapper.Map<List<CategoryDto>>(tagCategory)
};
//插入到缓存
cache.Set(cacheKey, output);
//返回数据
return output;
});
return output;
}
/// <summary>
/// 获取前10篇文章
/// </summary>
/// <returns></returns>
public async Task<GetTopTenOutput> GetTopTen()
{
//从缓存获取数据
const string cacheKey = "GetTopTen";
AsyncThreadSafeObjectCache<GetTopTenOutput> cache = new AsyncThreadSafeObjectCache<GetTopTenOutput>(MemoryCache.Default, TimeSpan.FromSeconds(120));
GetTopTenOutput output = await cache.GetAsync(cacheKey, async () =>
{
//获取前10条数据
var posts = await this._postRepository.GetEnumerableTopTen(10);
output = new GetTopTenOutput
{
Items = posts.MapTo<IReadOnlyList<TopTenPostDto>>()
};
cache.Set(cacheKey, output);
return output;
});
if (output == null)//缓存不存在数据
{
}
return output;
}