public override IQueryable <TEntity> Query()
{
var entityName = typeof(TEntity).Name;
var queryableCacheKey = $"{entityName}_QueryAll";
var enumCacheValue = (CacheGroup)Enum.Parse(typeof(CacheGroup), entityName);
_cache.TryGetValue(enumCacheValue, queryableCacheKey, out IQueryable <TEntity> queryAll);
if (queryAll == null)
{
queryAll = base.Query().ToList().AsQueryable();
_cache.Set(enumCacheValue, queryableCacheKey, queryAll);
}
var attachedEntities = _dbContext.ChangeTracker.Entries <TEntity>().Select(e => e.Property("Id").CurrentValue);
foreach (var item in queryAll)
{
var itemId = typeof(TEntity).GetProperty("Id").GetValue(item);
if (!attachedEntities.Contains(itemId))
{
_dbContext.Attach(item);
}
}
return(queryAll);
}
/// <summary>
/// Se encarga de verificar si un objeto o lista de objetos se encuentran cacheados, dada una key
/// </summary>
/// <typeparam name="T">Tipo alojado en la cache</typeparam>
/// <param name="key">Key a buscar en la cache</param>
/// <param name="action">Funcion a invocar si los valores no se encuentran en la cache</param>
/// <returns></returns>
private IEnumerable <T> TryToGetFromCache <T>(string key, Func <IEnumerable <T> > action)
{
var found = _cache.TryGetValue(CACHE_GROUP, key, out IEnumerable <T> values);
if (!found)
{
values = action();
_cache.Set(CACHE_GROUP, key, values, new ExpirationSettings {
AbsoluteExpiration = CACHE_LEVEL
});
}
return(values);
}