Producer-Consumer Pattern

Hier is one my example of Producer-Consumer Pattern.

First I want to read all files from HDD and put them in the queue (producer):

private void SearchForAllFilesAndPutThemInQueue(BlockingCollection<string> fileQueue, string path)
{
	foreach (string file in Directory.EnumerateFiles(path, "*.*", SearchOption.AllDirectories))
	{
		fileQueue.Add(file);
	}
}

Then I will read file names from queue and do something with (consumer):

private void ReadFileNamesFromQueue
(
	BlockingCollection<string>? fileQueue
	, BlockingCollection<(LatLngModel, string)>? gpsInfoQueue
)
{
	int i = 0;

	if (fileQueue is null) throw new ArgumentNullException(nameof(fileQueue));
	if (gpsInfoQueue is null) throw new ArgumentNullException(nameof(gpsInfoQueue));

	foreach (string file in fileQueue.GetConsumingEnumerable())
	{
		try
		{
			ExtractGpsInfoFromImageCommand extractGpsInfoFromImageCommand = new ExtractGpsInfoFromImageCommand();
			extractGpsInfoFromImageCommand.ImageFileNameToReadGpsFrom = file;
			extractGpsInfoFromImage.Execute(extractGpsInfoFromImageCommand);

			if (extractGpsInfoFromImageCommand.LatLngModel is not null)
			{
				gpsInfoQueue.Add((extractGpsInfoFromImageCommand.LatLngModel, file));
			}
		}
		catch (Exception ex)
		{
			Debug.WriteLine(ex.Message());
		}
	}
}

Here you can download my example, little bit complicated, where I get list of file in one queue, in second I try to extract GPS info, and from third queue I am saving to CSV file file name and longitude / latitude.