I'm trying to optimize the push notifications on my server. For now I send those one by one (with an old library) and it takes a while (4 hours).
I refactored my service to send a notification with a lot of device tokens (For now I tried with batches of 500 tokens). For that I'm using the Redth/PushSharp library. I followed the sample code then I adapted it to send the notifications to severals device tokens.
PushService service = new PushService();
//Wire up the events
service.Events.OnDeviceSubscriptionExpired += new PushSharp.Common.ChannelEvents.DeviceSubscriptionExpired(Events_OnDeviceSubscriptionExpired);
service.Events.OnDeviceSubscriptionIdChanged += new PushSharp.Common.ChannelEvents.DeviceSubscriptionIdChanged(Events_OnDeviceSubscriptionIdChanged);
service.Events.OnChannelException += new PushSharp.Common.ChannelEvents.ChannelExceptionDelegate(Events_OnChannelException);
service.Events.OnNotificationSendFailure += new PushSharp.Common.ChannelEvents.NotificationSendFailureDelegate(Events_OnNotificationSendFailure);
service.Events.OnNotificationSent += new PushSharp.Common.ChannelEvents.NotificationSentDelegate(Events_OnNotificationSent);
service.Events.OnChannelCreated += new PushSharp.Common.ChannelEvents.ChannelCreatedDelegate(Events_OnChannelCreated);
service.Events.OnChannelDestroyed += new PushSharp.Common.ChannelEvents.ChannelDestroyedDelegate(Events_OnChannelDestroyed);
//Configure and start ApplePushNotificationService
string p12Filename = ...
string p12FilePassword = ...
var appleCert = File.ReadAllBytes(p12Filename);
service.StartApplePushService(new ApplePushChannelSettings(true, appleCert, p12FilePassword));
var appleNotification = NotificationFactory.Apple();
foreach (var itemToProcess in itemsToProcess)
{
itemToProcess.NotificationDateTime = DateTime.Now;
mobile.SubmitChanges();
string deviceToken = GetCleanDeviceToken(itemToProcess.MobileDevice.PushNotificationIdentifier);
appleNotification.ForDeviceToken(deviceToken);
}
service.QueueNotification(appleNotification
.WithAlert(itemsToProcess[0].MobileDeviceNotificationText.Text)
.WithSound("default")
.WithBadge(0)
.WithCustomItem("View", itemsToProcess[0].Value.ToString()));
//Stop and wait for the queues to drains
service.StopAllServices(true);
Then I tried to send 3 notifications to 2 devices. Only the first device got them (and the problem is not device-related because I tried with both of them separately). Right after that an OperationCanceledException is thrown in the PushChannelBase class. So I don't know what's wrong. Any idea?
You should queue a separate notification for each item to process.
It is not possible set multiple device tokens on a single notification. The OperationCanceledException will occur, because you do.