private void OnFileFinishedChangingEvent(object sender, FileFinishedChangingEventArgs e)
{
if (e.ChangeType == FileEventType.Deleted || e.ChangeType == FileEventType.Renamed) return;
var fileFinishedChangingMessage = new FileFinishedChangingMessage
{
CorrelationId = CombGuid.Generate(),
FilePath = e.FilePath,
Folder = (FolderElement)e.UserState
};
BusDriver.Instance.GetBus(CommanderService.CommandManagerBusName).Publish(fileFinishedChangingMessage);
}
static void OnFileFinishedChangingEvent(object sender, FileFinishedChangingEventArgs e)
{
lock (Lock)
{
Console.WriteLine("OnFileFinishedChangingEvent:");
Console.WriteLine(" FilePath = {0}", e.FilePath);
Console.WriteLine(" ChangeType = {0}", Enum.GetName(typeof (FileEventType), e.ChangeType));
Console.WriteLine();
}
}
private void OnFileDeleted(object sender, FileSystemEventArgs e)
{
var filePath = e.FullPath;
//There is no good way of detecting files without extensions and directories with full stops in name. The file/directory has been deleted so we can't find it out from the path.
var isDirectory = Path.GetExtension(filePath) == string.Empty;
if (isDirectory)
{
lock (_filesRaisingEventsLock)
{
var filesInDirectory = _filesChanging.Keys.Where(x => x.StartsWith(e.FullPath + "/"));
foreach (var fileInDirectory in filesInDirectory)
{
Pop(fileInDirectory);
}
}
var directoryDeletedEventArgs = new DirectoryDeletedEventArgs(e.FullPath, UserState);
RaiseAsynchronousOnDirectoryDeletedEvent(directoryDeletedEventArgs);
return;
}
if (!ShouldMonitorFile(filePath)) return;
lock (_filesRaisingEventsLock)
{
if (_filesChanging.ContainsKey(filePath))
{
Pop(filePath);
var fileFinishedChangingEventArgs = new FileFinishedChangingEventArgs(filePath, FileEventType.Deleted, UserState);
RaiseAsynchronousOnFileFinishedChangingEvent(fileFinishedChangingEventArgs);
}
}
var fileDeletedEventArgs = new FileDeletedEventArgs(e.FullPath, UserState);
RaiseAsynchronousOnFileDeletedEvent(fileDeletedEventArgs);
}
/// <summary>
/// Will raise the event on the calling thread synchronously.
/// i.e. it will wait until all event handlers have processed the event.
/// </summary>
/// <param name="state">The state to be passed to the event.</param>
private void RaiseCrossThreadOnFileFinishedChangingEvent(FileFinishedChangingEventArgs e)
{
_asyncOperation.SynchronizationContext.Send(new SendOrPostCallback(AsynchronousOnFileFinishedChangingEventRaised), e);
}
/// <summary>
/// Will raise the event on the current thread synchronously.
/// i.e. it will wait until all event handlers have processed the event.
/// </summary>
/// <param name="e">The state to be passed to the event.</param>
private void RaiseOnFileFinishedChangingEvent(FileFinishedChangingEventArgs e)
{
// Make a temporary copy of the event to avoid possibility of
// a race condition if the last subscriber unsubscribes
// immediately after the null check and before the event is raised.
FileFinishedChangingEventHandler eventHandler;
if (!Monitor.TryEnter(_fileFinishedChangingEventLock, _lockTimeout))
{
throw new ApplicationException("Timeout waiting for lock - RaiseOnFileFinishedChangingEvent");
}
try
{
eventHandler = _fileFinishedChangingEvent;
}
finally
{
Monitor.Exit(_fileFinishedChangingEventLock);
}
OnFileFinishedChangingEvent(e);
if (eventHandler != null)
{
eventHandler(this, e);
}
}
/// <summary>
/// Will raise the event on the calling thread asynchronously.
/// i.e. it will immediatly continue processing even though event
/// handlers have not processed the event yet.
/// </summary>
/// <param name="state">The state to be passed to the event.</param>
private void RaiseAsynchronousOnFileFinishedChangingEvent(FileFinishedChangingEventArgs e)
{
_asyncOperation.Post(new SendOrPostCallback(AsynchronousOnFileFinishedChangingEventRaised), e);
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// <remarks>We using an in memory queue and poping them off one by one. We may have 1000s of file events so executing them all
/// at once does not scale well.</remarks>
private void OnTimeUp(object sender, ElapsedEventArgs e)
{
lock (_filesRaisingEventsLock)
{
if (_timer == null) return;
_timer.Stop();
if (!string.IsNullOrEmpty(_nextFileToCheck) && _filesChanging.ContainsKey(_nextFileToCheck))
{
var item = _filesChanging[_nextFileToCheck];
if (item.FireTime <= DateTime.Now)
{
var fileFinishedChangingEventArgs = new FileFinishedChangingEventArgs(item.FilePath, item.FileEventType, UserState);
_fileFinishedChangingCallback(fileFinishedChangingEventArgs);
}
}
GetNextFileToCheck();
}
}
private void OnFileRenamed(object sender, RenamedEventArgs e)
{
var filePath = e.FullPath;
var isDirectory = Directory.Exists(filePath) && (File.GetAttributes(filePath) & FileAttributes.Directory) == FileAttributes.Directory;
if (isDirectory)
{
lock (_filesRaisingEventsLock)
{
var filesInDirectory = _filesChanging.Keys.Where(x => x.StartsWith(e.OldFullPath + "/"));
foreach (var fileInDirectory in filesInDirectory)
{
var fileInDirectoryPath = _filesChanging[fileInDirectory].FilePath;
Pop(fileInDirectory);
var fileFinishedChangingEventArgs = new FileFinishedChangingEventArgs(fileInDirectoryPath, FileEventType.Renamed, UserState);
RaiseAsynchronousOnFileFinishedChangingEvent(fileFinishedChangingEventArgs);
}
}
var directoryRenamedEventArgs = new DirectoryRenamedEventArgs(e.OldFullPath, e.FullPath, UserState);
RaiseAsynchronousOnDirectoryRenamedEvent(directoryRenamedEventArgs);
return;
}
if (!ShouldMonitorFile(filePath)) return;
lock (_filesRaisingEventsLock)
{
if (_filesChanging.ContainsKey(filePath))
{
Pop(filePath);
var fileFinishedChangingEventArgs = new FileFinishedChangingEventArgs(filePath, FileEventType.Renamed, UserState);
RaiseAsynchronousOnFileFinishedChangingEvent(fileFinishedChangingEventArgs);
}
}
var fileRenamedEventArgs = new FileRenamedEventArgs(e.OldFullPath, e.FullPath, UserState);
RaiseAsynchronousOnFileRenamedEvent(fileRenamedEventArgs);
}
/// <summary>
/// Template method to add default behaviour for the event
/// </summary>
private void OnFileFinishedChangingEvent(FileFinishedChangingEventArgs e)
{
// TODO: Implement default behaviour of OnFileFinishedChangingEvent
}
private void OnFileFinishedChanging(FileFinishedChangingEventArgs e)
{
lock (_filesRaisingEventsLock)
{
var filePath = e.FilePath;
if (_filesChanging.ContainsKey(filePath))
{
if ( IsFileLocked(filePath))
{
//The file is still currently in use, lets try raise the event later
Touch(filePath);
}
else
{
Pop(filePath);
var fileFinishedChangingEventArgs = new FileFinishedChangingEventArgs(e.FilePath, e.ChangeType, UserState);
//We only want to know about the last event, not any that may have happened in the mean time
_filesFinishedChanging[fileFinishedChangingEventArgs.FilePath] = fileFinishedChangingEventArgs;
RaiseAsynchronousOnFileFinishedChangingEvent(fileFinishedChangingEventArgs);
if (_filesChanging == null || _filesChanging.Count < 1)
{
if (_filesFinishedChanging != null && _filesFinishedChanging.Count > 0)
{
//There are no more files that are in the change queue so let everyone know the files have finished changing
var filesFinishedChangingEventArgs = new FilesFinishedChangingEventArgs(new List<FileFinishedChangingEventArgs>(_filesFinishedChanging.Values), UserState);
RaiseAsynchronousOnFilesFinishedChangingEvent(filesFinishedChangingEventArgs);
_filesFinishedChanging = new Dictionary<string, FileFinishedChangingEventArgs>();
}
}
}
}
}
}