private void SquashAndLogChanges(FileSystemEventBatchArgs args)
{
var list = new List <SimpleFileChangedEventArgs>();
foreach (var arg in args.FileEvents)
{
var simpleArg = new SimpleFileChangedEventArgs(arg);
var index = list.IndexOf(simpleArg);
if (index >= 0)
{
list.RemoveAt(index);
}
list.Add(simpleArg);
}
args.FileEvents.Clear();
foreach (var change in list)
{
var e = change.Args;
if (!IsPathToWatch(e.FullPath))
{
continue;
}
args.FileEvents.Add(e);
if (Site.CanInfo())
{
Site.Info($"File event occured: {e.ChangeType} -> {e.FullPath}");
}
}
}
private void ProcessEvents()
{
_threadStarted = true;
while (true)
{
FileSystemEventBatchArgs batchEventsCopy = null;
if (_onClosingEvent.WaitOne(SleepForward))
{
break;
}
lock (_batchLock)
{
if (_clock.ElapsedMilliseconds <= MillisTimeout)
{
continue;
}
if (_batchEvents != null && _batchEvents.FileEvents.Count > 0)
{
batchEventsCopy = _batchEvents;
_batchEvents = null;
}
else
{
continue;
}
}
// TODO: squash events here (to avoid having duplicated events)
// Invoke listeners
try
{
SquashAndLogChanges(batchEventsCopy);
// Squash can discard events (e.g if files excluded)
if (batchEventsCopy.FileEvents.Count > 0)
{
FileSystemEvents?.Invoke(this, batchEventsCopy);
}
}
catch (Exception ex)
{
Site.Error(ex, $"Unexpected error on SiteWatcher callback. Reason: {ex.GetReason()}");
}
}
_onClosingEvent.Reset();
}
private void OnFileSystemEvent(object sender, FileChangedEventArgs e)
{
// Don't log events until the thread is started
if (!_threadStarted)
{
return;
}
var dir = new DirectoryEntry(e.FileSystem, e.FullPath);
if (IsOutputDirectory(e.FullPath))
{
return;
}
lock (_watchers)
{
var isDirectory = dir.Exists;
switch (e.ChangeType)
{
case WatcherChangeTypes.Deleted:
if (isDirectory)
{
DisposeWatcher(dir);
}
break;
case WatcherChangeTypes.Created:
// Create watcher only for top-level directories
if (isDirectory && dir.Parent != null && dir.Parent == _siteDirectory)
{
WatchFolder(dir);
}
break;
case WatcherChangeTypes.Renamed:
var renamed = (FileRenamedEventArgs)e;
if (isDirectory)
{
var previousDirectory = new DirectoryEntry(renamed.FileSystem, renamed.OldFullPath);
if (_watchers.TryGetValue(previousDirectory, out _))
{
DisposeWatcher(previousDirectory);
// Create watcher only for top-level directories
if (dir.Parent != null && dir.Parent == _siteDirectory)
{
WatchFolder(dir);
}
}
}
break;
}
}
lock (_batchLock)
{
_clock.Restart();
if (_batchEvents == null)
{
_batchEvents = new FileSystemEventBatchArgs();
}
_batchEvents.FileEvents.Add(e);
}
}
