private ICommit GetStreamHead(HeadKey headKey)
{
lock (_maxItemsToTrack)
{
_heads.TryGetValue(headKey, out ICommit head);
return(head);
}
}
private void RemoveHead(HeadKey head)
{
_heads.Remove(head);
LinkedListNode <HeadKey> node = _maxItemsToTrack.Find(head); // There should only be ever one or none
if (node != null)
{
_maxItemsToTrack.Remove(node);
}
}
private void UpdateStreamHead(ICommit committed)
{
HeadKey headKey = GetHeadKey(committed);
ICommit head = GetStreamHead(headKey);
if (AlreadyTracked(head))
{
_maxItemsToTrack.Remove(headKey);
}
head = head ?? committed;
head = head.StreamRevision > committed.StreamRevision ? head : committed;
_heads[headKey] = head;
}
private void TrackUpToCapacity(ICommit committed)
{
Logger.LogTrace(Resources.TrackingCommit, committed.CommitSequence, committed.StreamId, committed.BucketId);
_maxItemsToTrack.AddFirst(GetHeadKey(committed));
if (_maxItemsToTrack.Count <= _maxStreamsToTrack)
{
return;
}
HeadKey expired = _maxItemsToTrack.Last.Value;
Logger.LogTrace(Resources.NoLongerTrackingStream, expired.StreamId, expired.BucketId);
_heads.Remove(expired);
_maxItemsToTrack.RemoveLast();
}
public bool HeadNeedUpdate(out string key, KeyDate right)
{
key = string.Empty;
if (Initialized)
{
if (lines.Head > right && lines.Tail <= right)
{
if (lines.IsHead(HeadKey) || HeadKey > right)
{
key = HeadKey.ToString();
}
else
{
key = lines.GetNext(HeadKey).ToString();
}
return(true);
}
}
return(false);
}
