public bool TryGetLastValue(out StreamId lastValue)
{
var lastEventNumber = _indexReader.GetStreamLastEventNumber(LogV3SystemStreams.StreamsCreatedStreamNumber);
var success = ExpectedVersion.NoStream < lastEventNumber && lastEventNumber != EventNumber.DeletedStream;
lastValue = StreamIdConverter.ToStreamId(lastEventNumber);
return(success);
}
private void CheckStreamVersion(string streamId, int newEventNumber, CommitLogRecord commit)
{
if (newEventNumber == EventNumber.DeletedStream)
{
return;
}
int lastEventNumber = _indexReader.GetStreamLastEventNumber(streamId);
if (newEventNumber != lastEventNumber + 1)
{
if (Debugger.IsAttached)
{
Debugger.Break();
}
else
{
throw new Exception(
string.Format("Commit invariant violation: new event number {0} doesn't correspond to current stream version {1}.\n"
+ "Stream ID: {2}.\nCommit: {3}.", newEventNumber, lastEventNumber, streamId, commit));
}
}
}
bool IReadIndex.IsStreamDeleted(string streamId)
{
return(_indexReader.GetStreamLastEventNumber(streamId) == EventNumber.DeletedStream);
}