protected override async Task ExecuteAsync(CancellationToken cancellationToken)
{
_logger.LogInformation("Hosted Service running.");
System.Diagnostics.Debug.WriteLine("Hosted Service running.");
Load();
metaDataMusicBrainz = new MetaDataMusicBrainz(Path.Combine(discsPath, "MusicBrainz"), discsRelPath + "/MusicBrainz");
metaDataGD3 = new MetaDataGD3(_provider, contentRootPath, Path.Combine(discsPath, "GD3"), discsRelPath + "/GD3");
key2DiscChanger = new Dictionary <string, DiscChanger>(DiscChangers.Count);
List <Task> connectTasks = new List <Task>(DiscChangers.Count);
foreach (var discChanger in DiscChangers)
{
key2DiscChanger[discChanger.Key] = discChanger;
foreach (var kvp in discChanger.Discs)
{
Disc d = kvp.Value;
d.DataMusicBrainz = metaDataMusicBrainz.Get(d);
d.DataGD3Match = metaDataGD3.Get(d);
}
try
{
connectTasks.Add(discChanger.Connect(this, _hubContext, _logger));
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Exception connecting disc changer: " + discChanger.Key + ": " + e.Message);
await _hubContext.Clients.All.SendAsync("StatusData",
discChanger.Key,
null,
null,
null,
"off",
null);
}
}
Task.WaitAll(connectTasks.ToArray());
_logger.LogInformation("Hosted service starting");
TimeSpan discDataTimeOut = TimeSpan.FromSeconds(3);
const int NullStatusQueryFrequency = 40;//only query null status every 40x3 seconds
var metaDataSet = new HashSet <string> {
MetaDataMusicBrainz.Type, MetaDataGD3.Type_Match
};
var metaDataSetWithGD3Lookup = new HashSet <string> {
MetaDataMusicBrainz.Type, MetaDataGD3.Type_Match, MetaDataGD3.Type_MetaData
};
await Task.Factory.StartNew(async() =>
{
int countDown = NullStatusQueryFrequency;
// loop until a cancellation is requested
while (!cancellationToken.IsCancellationRequested)
{
_logger.LogInformation("Hosted service executing - {0}", DateTime.Now);
try
{
Disc d = await discDataMessages.ReceiveAsync(discDataTimeOut, cancellationToken);
DiscChanger dc = d.DiscChanger;
await UpdateMetaData(d, (metaDataGD3?.AutoLookupEnabled(d) ?? false) ? metaDataSetWithGD3Lookup : metaDataSet, true);
d.DateTimeAdded ??= DateTime.Now;
dc.Discs[d.Slot] = d;
needsSaving = true;
}
catch (OperationCanceledException) { }
catch (TimeoutException)
{
if (needsSaving)
{
Save();
}
countDown--;
foreach (var discChanger in DiscChangers)
{
var status = discChanger.CurrentStatus();
if ((status == null && countDown == 0) /*||(status!=null&&status.IsOutDated())*/) //feature to refresh outdated status prevents auto off on DVP-CX777ES
{
discChanger.ClearStatus();
if (discChanger.Connected())
{
discChanger.InitiateStatusUpdate();
}
}
}
if (countDown <= 0)
{
countDown = NullStatusQueryFrequency;
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Hosted Service Exception: " + e.Message);
_logger.LogInformation(e, "Hosted Service Exception");
}
}
}, cancellationToken);
}
