/// <summary>
/// Processes the request async.
/// </summary>
public async override Task ProcessAsync()
{
try
{
DepartureBoardRequest dbRequest = await Receive <DepartureBoardRequest>();
Logging.Log($"Received departure board request from { ((IPEndPoint)client.Client.RemoteEndPoint).Address.ToString() }. Data: { dbRequest.ToString() }");
DepartureBoardResponse dbRes = null;
await Task.Run(() =>
{
if (dbRequest is StationInfoRequest)
{
using (var dbProcessing = new Interop.DepartureBoardManaged(DataFeed.Full, (StationInfoRequest)dbRequest))
{
dbProcessing.ObtainDepartureBoard();
dbRes = dbProcessing.ShowDepartureBoard();
}
}
else if (dbRequest is LineInfoRequest)
{
using (var dbProcessing = new Interop.DepartureBoardManaged(DataFeed.Full, (LineInfoRequest)dbRequest))
{
dbProcessing.ObtainDepartureBoard();
dbRes = dbProcessing.ShowDepartureBoard();
}
}
else
{
throw new NotImplementedException();
}
});
Send(dbRes);
Logging.Log($"Departure board response to { ((IPEndPoint)client.Client.RemoteEndPoint).Address.ToString() } was successfully send.");
}
catch (Exception ex)
{
Logging.Log($"Departure board request from { ((IPEndPoint)client.Client.RemoteEndPoint).Address.ToString() } could not be processed. { Logging.LogException(ex) }");
}
Dispose();
}
private static async Task <DepartureBoardResponse> SendDepartureBoardRequestAsync(LineInfoRequest dbRequest, bool forceCache = false)
{
DepartureBoardResponse dbResponse = null;
if (DataFeedDesktop.OfflineMode)
{
await Task.Run(() =>
{
using (var dbProcessing = new Interop.DepartureBoardManaged(DataFeedDesktop.Full, dbRequest))
{
dbProcessing.ObtainDepartureBoard();
dbResponse = dbProcessing.ShowDepartureBoard();
}
});
}
else
{
using (var dbProcessing = new DepartureBoardProcessing())
{
var cached = LineInfoCached.Select(dbRequest.RouteInfoID);
if (cached == null || (cached.ShouldBeUpdated || forceCache))
{
try
{
if (!await CheckBasicDataValidity())
{
var results = cached?.FindResultsSatisfyingRequest(dbRequest);
return(results?.Departures.Count == 0 ? null : results);
}
// Process the request immediately so the user does not have to wait until the caching is completed.
dbResponse = await dbProcessing.ProcessAsync(dbRequest, dbRequest.Count == -1?int.MaxValue : Settings.TimeoutDuration);
// Then update the cache.
#pragma warning disable CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
if (cached != null && cached.ShouldBeUpdated && dbRequest.Count != -1)
{
Task.Run(async() => cached.UpdateCache(await dbProcessing.ProcessAsync(cached.ConstructNewRequest(), int.MaxValue)));
}
#pragma warning restore CS4014 // Because this call is not awaited, execution of the current method continues before the call is completed
}
catch (System.Net.WebException)
{
MessageBox.Show(Settings.Localization.UnreachableHost, Settings.Localization.Offline, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
{
dbResponse = cached?.FindResultsSatisfyingRequest(dbRequest);
if (dbResponse?.Departures.Count == 0)
{
dbResponse = await dbProcessing.ProcessAsync(dbRequest, Settings.TimeoutDuration);
}
}
}
}
return(dbResponse);
}
