private void QueueInitialFiles(FileSystemEventQueue queue)
{
_logger.QueuingInitialFiles();
foreach (var file in Directory.GetFiles(_configuration.DirectoryToMonitor, _configuration.DirectoryFileFilter, SearchOption.TopDirectoryOnly))
{
queue.Enqueue(new FileSystemEventArgs(WatcherChangeTypes.All, _configuration.DirectoryToMonitor, Path.GetFileName(file)));
}
}
private void Initialize(FileSystemEventQueue queue, FileSystemWatcher watcher)
{
var initializationTasks = new[]
{
Task.Run(() => InitializeWatcher(queue, watcher)),
Task.Run(() => QueueInitialFiles(queue))
};
Task.WaitAll(initializationTasks);
_isInitializedEvent.Set();
}
private void InitializeWatcher(FileSystemEventQueue queue, FileSystemWatcher watcher)
{
_logger.Initializing <FileSystemEventCollection>();
watcher.NotifyFilter = NotifyFilters.FileName
| NotifyFilters.CreationTime
| NotifyFilters.LastWrite;
watcher.Created += (s, e) => queue.Enqueue(e);
watcher.Changed += (s, e) => queue.Enqueue(e);
watcher.Deleted += (s, e) => queue.Enqueue(e);
watcher.Renamed += (s, e) => queue.Enqueue(e);
watcher.EnableRaisingEvents = true;
}
/// <inheritdoc/>
/// <summary>
/// Iterates over the collection of <see cref="FileSystemEventArgs"/> awaiting any new ones.
/// This is long running and will block while waiting for the next file system event
/// </summary>
/// <remarks>
/// On initial creation of collection will create an event for all files currently in
/// monitored directory.
/// </remarks>
/// <returns> Non duplicate <see cref="FileSystemEventArgs"/> </returns>
public IEnumerator <FileSystemEventArgs> GetEnumerator()
{
if (!_cancellationToken.IsCancellationRequested)
{
using (var watcher = new FileSystemWatcher(_configuration.DirectoryToMonitor, _configuration.DirectoryFileFilter))
using (var queue = new FileSystemEventQueue(_configuration.DuplicateEventDelayWindow.TotalMilliseconds, _logger))
{
Initialize(queue, watcher);
if (!_cancellationToken.IsCancellationRequested)
{
while (queue.TryDequeue(out var fileSystemEventArgs, _cancellationToken))
{
yield return(fileSystemEventArgs);
}
}
}
}
_logger.CancellationRequested();
}