public void SetDegreeOfParallelism(int degreeOfParallelism)
{
try
{
DegreeOfParallelism = degreeOfParallelism;
}
catch (Exception ex)
{
OnDownloaderException?.Invoke(ex);
}
}
public void AddFileToDownloadingQueue(string fileId, string url, string pathToSave)
{
try
{
DownloadQueue.Enqueue(fileId);
var download = new Download(fileId, url, pathToSave, CreateDownload(url, pathToSave, fileId));
if (!AllDownloads.TryAdd(fileId, download))
{
throw new Exception($"An exception while adding {fileId}");
}
Task.Factory.StartNew(() => OnFileProgress?.Invoke(fileId, 0, 0)).Wait();
}
catch (Exception ex)
{
OnDownloaderException?.Invoke(ex);
}
ManageDownloads();
}
private async Task ManageDownloads()
{
try
{
if (DownloadingNow.Count < DegreeOfParallelism && DownloadQueue.Count > 0)
{
for (int i = 0; i < degreeOfParallelism - DownloadingNow.Count; i++)
{
string download;
if (DownloadQueue.TryDequeue(out download))
{
DownloadingNow.Add(download);
}
}
}
if (DownloadingNow.Count > 0)
{
var downloads = DownloadingNow.ToArray();
foreach (string id in downloads)
{
var download = GetFromAllDownloads(id);
if (download.DownloadTask.Status == TaskStatus.RanToCompletion || download.DownloadTask.Status == TaskStatus.Faulted)
{
RemoveFromDownloadingNow(id);
}
if (download.DownloadTask.Status == TaskStatus.WaitingForActivation)
{
RunDownloadTask(download.DownloadTask);
}
}
}
}
catch (Exception ex)
{
OnDownloaderException?.Invoke(ex);
}
}