private int GetLastStreamEventNumberCached(ITransactionFileReader reader, string streamId)
{
Ensure.NotNull(streamId, "streamId");
StreamCacheInfo streamInfo;
if (_streamInfoCache.TryGet(streamId, out streamInfo) && streamInfo.LastEventNumber.HasValue)
{
return(streamInfo.LastEventNumber.Value);
}
var lastEventNumber = GetLastStreamEventNumberUncached(reader, streamId);
if (lastEventNumber != ExpectedVersion.NoStream)
{
// we should take Max on LastEventNumber because there could be a commit happening in parallel thread
// so we should not overwrite the actual LastEventNumber updated by Commit method with our stale one
_streamInfoCache.Put(
streamId,
key => new StreamCacheInfo(lastEventNumber, null),
(key, old) => new StreamCacheInfo(Math.Max(lastEventNumber, old.LastEventNumber ?? -1), old.Metadata));
}
return(lastEventNumber);
}
public bool IsOptimized(TFChunk.TFChunk chunk)
{
TFChunk.TFChunk value;
return(_cache.TryGet(chunk.FileName, out value));
}
