private Tuple <IList <TElement>, bool> MemoizeCollection <TElement>(
CacheAddParameters <IList <IBaseCacheKey> > parameters)
where TElement : class
{
IList <TElement> collection = null;
var result = parameters.Fill(FreshnessRequest.Normal);
if (result.Item2 || result.Item1 == null)
{
return(Tuple.Create(collection, result.Item2));
}
var cachedKeys = result.Item1;
collection = new List <TElement>(cachedKeys.Count);
foreach (var cachedKey in cachedKeys)
{
var element = this.Get <TElement>(cachedKey.Key);
if (element == null)
{
return(null); // failed to find one... declare failure and go to backing store
}
collection.Add(element);
}
// shove the answer-set into the cache only AFTER we validate all the entries.
parameters.Put(cachedKeys);
return(Tuple.Create(collection, false));
}
private static Tuple <T, bool> MemoizeElement <T>(CacheAddParameters <T> parameters)
where T : class
{
var result = parameters.Fill(FreshnessRequest.Normal);
if (result != null && !result.Item2)
{
var value = result.Item1;
parameters.Put(value);
}
return(result);
}