/// <summary>
/// Gets trained faces from the API.
/// </summary>
/// <param name="person">The person.</param>
/// <param name="guidList">The unique identifier list.</param>
/// <returns></returns>
private async Task GetFacesFromServerAsync(PersonExtended person, ConcurrentBag <Guid> guidList)
{
var tasks = new List <Task>();
Guid guid;
while (guidList.TryTake(out guid))
{
tasks.Add(Task.Factory.StartNew((object inParams) =>
{
var prm = (Tuple <PersonExtended, Guid>)inParams;
try
{
var face = _faceServiceClient.GetPersonFaceInLargePersonGroupAsync(SelectedGroup.Group.LargePersonGroupId, prm.Item1.Person.PersonId, prm.Item2).Result;
this.Dispatcher.Invoke(
new Action <ObservableCollection <Models.Face>, string, PersistedFace>(UIHelper.UpdateFace),
prm.Item1.Faces,
face.UserData,
face);
}
catch (FaceAPIException e)
{
// if operation conflict, retry.
if (e.ErrorCode.Equals("ConcurrentOperationConflict"))
{
guidList.Add(guid);
}
}
catch (Exception ex)
{
if (ex.InnerException != null && ex.InnerException.Message.Contains("not found"))
{
return;
}
guidList.Add(guid);
this.Dispatcher.Invoke(() =>
{
MainWindow.Log($"Service request limit exceeded (20/min) - Re-trying in 2 seconds");
Task.Delay(2000).Wait();
});
}
}, new Tuple <PersonExtended, Guid>(person, guid)));
if (tasks.Count >= _maxConcurrentProcesses || guidList.IsEmpty)
{
await Task.WhenAll(tasks);
tasks.Clear();
}
}
await Task.WhenAll(tasks);
tasks.Clear();
return;
}
