public Task <ICacheEntry> GetAsync(string key, CancellationToken ct)
{
var found = _cache.TryGetValue(key, out ArraySegment <byte> bytes);
if (!found)
{
return(Task.FromResult <ICacheEntry>(new EmptyCacheEntry()));
}
return(Task.FromResult <ICacheEntry>(new MemoryCacheEntry(bytes)));
}
// Calling thread need to be first lock "_lock"
private ICacheEntry GetInternal(string key)
{
var inUse = _inUse.TryGetValue(key, out DiskCacheEntry entry);
if (inUse)
{
return(entry);
}
var found = _lruCache.TryGetValue(key, out entry);
if (found)
{
// Move from _lruCache to _inUse
_lruCache.Remove(key);
_inUse.TryAdd(key, entry);
return(entry);
}
else
{
return(new EmptyCacheEntry());
}
}