// Advances the enumerator to the next file to be processed and attempts to process it.
private void EnumerateNextFile(string watchDirectory, DateTime enumerationStart, HashSet <string> enumeratedFiles, IEnumerator <string> enumerator)
{
// If the file processor has been
// disposed, return immediately
if (m_disposed)
{
return;
}
if (enumerator.MoveNext())
{
// Add the file to the collection of enumerated files
enumeratedFiles.Add(enumerator.Current);
// Attempt to process this file
if (File.Exists(enumerator.Current) && MatchesFilter(enumerator.Current))
{
TouchLockAndProcess(enumerator.Current);
}
// Move to the next file
m_processingQueue.Add(() => EnumerateNextFile(watchDirectory, enumerationStart, enumeratedFiles, enumerator));
}
else
{
// No more files to process, so we use the enumeratedFiles hash set
// to clean up files that have been removed from the watch directory
Predicate <string> predicate = filePath =>
{
DateTime lastWriteTime;
bool enumerated = enumeratedFiles.Contains(filePath);
bool touched = m_touchedFiles.TryGetValue(filePath, out lastWriteTime) && (lastWriteTime > enumerationStart);
bool isInWatchPath = filePath.StartsWith(watchDirectory, StringComparison.OrdinalIgnoreCase);
return(!enumerated && !touched && isInWatchPath);
};
m_processedFiles.RemoveWhere(predicate);
}
}
