public async Task <Stream> CreateAsync(IDocument entry, CancellationToken ct)
{
int i = 0;
Stream ret = null;
for (; i < FileChain.Length; i++)
{
var v = await FileChain[i].TryCreateAsync(entry, ct);
if (v.success || i >= FileChain.Length - 1)
{
ret = v.result;
break;
}
}
ret = new PushReadStream(ret);
for (i--; i >= 0; i--)
{
await FileChain[i].TryCreateAsync_Bubbleup(entry, ret, ct);
}
await CacheManager.Flush_CreateAsync(entry);
return(ret);
}
public DocumentCacheStreamListener(PushReadStream stream, DocumentCache cache, string cacheName) : this()
{
Stream = stream;
Cache = cache;
CacheName = cacheName;
tmpCache = new List <byte>(16);
valid = true;
}
public async Task TryOpenReadAsync_Bubbleup(IDocument entry, Stream result, CancellationToken ct)
{
string name = entry.FullPath();
if (!IgnoreIgnoreCache && RequestLockManager.GetStatus(name).Is(RequestStatus.IgnoreCache))
{
return;
}
if (result.CanSeek)
{
if (result is IDelayedDisposable)
{
(result as IDelayedDisposable).OnDisposeAsync.Add(async() => {
result.Position = 0;
await Store.TryPut(name, result);
});
}
else
{
await Store.TryPut(name, result);
result.Position = 0;
}
RequestLockManager.AddStatus(name, RequestStatus.Cached);
}
else if (result is PushReadStream &&
!RequestLockManager.GetStatus(name).Is(RequestStatus.IgnoreCache) &&
await Allocator.TryAllocate(name, () => Task.FromResult(entry), () => Task.FromResult(result))
)
{
PushReadStream prs = result as PushReadStream;
prs.AddListener(new DocumentCacheStreamListener(prs, this, name));
RequestLockManager.AddStatus(name, RequestStatus.Cached);
}
}
