/// <summary>
/// Get a value from the cache if all constraints are fulfilled.
/// </summary>
protected internal async Task <PageEnvelope <TModel> > CacheGetAsync(int offset, int limit, string keyPrefix, CancellationToken cancellationToken)
{
if (UseCacheAtAllMethodAsync != null &&
!await UseCacheAtAllMethodAsync(typeof(PageEnvelope <TModel>), cancellationToken))
{
return(null);
}
var key = GetCacheKeyForPage(keyPrefix, offset, limit);
return(await GetAndMaybeReturnAsync(key, cacheEnvelope => SerializingSupport.Deserialize <PageEnvelope <TModel> >(cacheEnvelope.Data), cancellationToken : cancellationToken));
}
/// <summary>
/// Get a value from the cache if all constraints are fulfilled.
/// </summary>
protected internal async Task <TModel[]> CacheGetAsync(int limit, string key, CancellationToken cancellationToken)
{
InternalContract.RequireGreaterThan(0, limit, nameof(limit));
if (limit > _limitOfItemsInReadAllCache)
{
return(null);
}
if (UseCacheAtAllMethodAsync != null &&
!await UseCacheAtAllMethodAsync(typeof(TModel[]), cancellationToken))
{
return(null);
}
return(await GetAndMaybeReturnAsync(key, cacheEnvelope =>
{
var array = SerializingSupport.Deserialize <TModel[]>(cacheEnvelope.Data);
if (limit > array.Length)
{
return array;
}
var subset = array.Take(limit);
return subset as TModel[] ?? subset.ToArray();
}, cancellationToken : cancellationToken));
}
