private void AddPushNotificationRequestToSend(PushNotificationRequest pushNotificationRequest)
{
lock (_pushNotificationRequestsToSend)
{
if (!_pushNotificationRequestsToSend.Any(p => p.BackendKey == pushNotificationRequest.BackendKey))
{
_pushNotificationRequestsToSend.Add(pushNotificationRequest);
}
}
}
public async Task SendPushNotificationRequestAsync(PushNotificationRequest request, CancellationToken cancellationToken)
{
// request can be null (e.g., if being called when working with the app-level health test callback, which has no associated protocol)
if (request == null)
{
return;
}
// if the PNR targets the current device but the protocol isn't listening, then don't send the request. this
// will eliminate unnecessary network traffic and prevent invalid PNRs from accumulating in the backend.
if (request.DeviceId == SensusServiceHelper.Get().DeviceId)
{
if (string.IsNullOrWhiteSpace(request.Protocol.PushNotificationsHub) || string.IsNullOrWhiteSpace(request.Protocol.PushNotificationsSharedAccessSignature))
{
SensusServiceHelper.Get().Logger.Log("PNR targets current device, which is not listening for PNs. Not sending PNR.", LoggingLevel.Normal, GetType());
return;
}
}
// send the push notification request to the remote data store
try
{
await request.Protocol.RemoteDataStore.SendPushNotificationRequestAsync(request, cancellationToken);
RemovePushNotificationRequestToSend(request.BackendKey);
}
catch (Exception sendException)
{
SensusServiceHelper.Get().Logger.Log("Exception while sending push notification request: " + sendException.Message, LoggingLevel.Normal, GetType());
AddPushNotificationRequestToSend(request);
}
finally
{
// we just attempted to send the push notification request, so it does not make sense for the
// request to be pending deletion. remove any pending push notification deletions.
RemovePushNotificationRequestToDelete(request.BackendKey);
}
}