private void OnCreated(object sender, FileSystemEventArgs e)
{
log($"FileSystemWatcher.OnCreated: File creation detected: {e.FullPath}");
// Make a FileInfo object out of it.
FileInfo f = null;
try
{
f = new FileInfo(e.FullPath);
}
catch (Exception exception)
{
// Well, guess we won't be handling this file.... Ignore.
log($"FileSystemWatcher.OnCreated: Exception creating FileInfo object: {exception.Message}");
return;
}
// File's not ready yet. Ignore.
while (!isFileUnlocked(f))
{
// This log entry is a partial duplicate with the one in isFileUnlocked. Both are commented because they SPAM LIKE CRAZY when files are transferred from slow media.
// log($"FileSystemWatcher.OnCreated: Ignoring locked file: {e.FullPath}");
Thread.Sleep(threadSleepTime);
// TODO Detect issues that aren't going to resolve themselves and cancel. Maybe have isFileUnlocked rethrow if the exception is not an in-use file?
}
// File is READY!
log($"FileSystemWatcher.OnCreated: Giving file to ImageReviewer module: {e.FullPath}");
Outputs.GetOutput(NextModule)?.Give(f);
}
// Sends the file under review to the Reject module, if any, then moves on to the next image and returns a bitmap of it.
public void Reject()
{
if (fileUnderReview == null)
{
return;
}
Outputs.GetOutput(RejectOutput)?.Give(fileUnderReview);
fileUnderReview = null;
}
// Sends the file under review to the Accept module, if any, then moves on to the next image and returns a bitmap of it.
public void Accept()
{
if (fileUnderReview == null)
{
return;
}
Outputs.GetOutput(AcceptOutput)?.Give(fileUnderReview);
fileUnderReview = null;
}
private void moveAndGiveFile(FileInfo file)
{
if (file == null)
{
return;
}
// If we have nowhere to put the file, pass it along (or let it disappear from the pipeline, if there's nowhere to go).
if (DestinationFolder == null)
{
log($"FileMover.Give: Nowhere to move file and nowhere to Give file: {file.FullName}");
Outputs.GetOutput(NextModule)?.Give(file);
return;
}
try
{
string destinationPath = DestinationFolder + "/" + file.Name;
try
{
// Remove the file if it exists.
if (File.Exists(destinationPath))
{
File.Delete(destinationPath);
}
log($"FileMover.moveAndGiveFile: Deleted existing file: {destinationPath}");
}
catch (Exception)
{
log($"FileMover.moveAndGiveFile: Could not delete existing file: {destinationPath}");
}
// Attempt the move. Note that MoveTo updates the fullName on successful move, so we don't have to worry about that.
file.MoveTo(destinationPath);
log($"FileMover.moveAndGiveFile: Moved file: {file.FullName}");
}
catch (Exception e)
{
log($"FileMover.Give: file.MoveTo threw exception: {e.Message}");
// And we DON'T return here, because we don't want to break the pipeline if there's a chance it could still work.
}
// Now we pass it on.
Outputs.GetOutput(NextModule)?.Give(file);
}
private void backgroundPrint(FileInfo file)
{
// Keep trying to print every second until it goes through.
while (!printers.TryPrint(file))
{
Thread.Sleep(retryDelayMS);
}
// Make sure we don't need the file anymore...
bool gotLock = false;
while (!gotLock)
{
qLock.Enter(ref gotLock);
}
if (!files.Contains(file))
{
// Then give the file to the next module.
Outputs.GetOutput(NextModule).Give(file);
}
qLock.Exit();
}