/// <summary>
/// Gets all cached tags.
/// </summary>
/// <param name="customerId">The customer identifier.</param>
/// <returns></returns>
public async Task <HashSet <string> > GetAllCachedTags(int customerId)
{
var cacheKey = string.Format(TagsIndexKeyTemplate, customerId);
var allCachedTags =
await cacheProvider.Get <HashSet <string> >(
cacheKey,
async() => new HashSet <string>(Mapper.Map <IList <Tag>, IList <string> >(await tagsService.FindTags(customerId)))
);
return(allCachedTags);
}