async Task OnSearch()
{
OnCancelSearch();
Results = null;
ResultsTime = "Running..";
cancellationTokenSource = new CancellationTokenSource();
CancelSearch.RaiseCanExecuteChanged();
serviceLocator.Get <INavigationService>()
.NavigateAsync(AppPages.Results, this).IgnoreResult();
ConcurrentBag <TrackViewModel> foundTracks = new ConcurrentBag <TrackViewModel>();
int numConsumers = NumberOfConsumers;
MusicProcessor processor = new MusicProcessor(numConsumers,
t => SearchCriteria.All(sc => sc.Test(t)),
t => foundTracks.Add(new TrackViewModel(t)));
Stopwatch sw = Stopwatch.StartNew();
try
{
await processor.Start(cancellationTokenSource.Token);
}
catch (OperationCanceledException)
{
}
finally
{
sw.Stop();
ResultsTime = string.Format("{0} consumer took {1} for {2} records.",
numConsumers, sw.Elapsed, foundTracks.Count);
Results = foundTracks.Distinct().OrderBy(t => t.Index).ToList();
cancellationTokenSource = null;
CancelSearch.RaiseCanExecuteChanged();
}
}
