public void CancelSubscription(DataNotificationSubscription subscription)
{
foreach (var kvp in this.NotificationCallbackRegister)
{
var storedSubscription = kvp.Value.FirstOrDefault(x => x.SubscriptionIdentifier == subscription.SubscriptionIdentifier);
if (storedSubscription != null)
{
kvp.Value.Remove(storedSubscription);
return;
}
}
}
public DataNotificationSubscription Subscribe <TNotification>(Action <TNotification> notificationCallback, string?topicFilter)
{
var subscriptionIdentifier = Guid.NewGuid();
var externalHandle = new DataNotificationSubscription(subscriptionIdentifier, this);
var internalHandle = new StoredSubscription(subscriptionIdentifier, notificationCallback, topicFilter);
var type = typeof(TNotification);
if (this.NotificationCallbackRegister.TryGetValue(type, out var registeredCallbacks))
{
registeredCallbacks.Add(internalHandle);
}
else
{
this.NotificationCallbackRegister[type] = new List <StoredSubscription> {
internalHandle
};
}
return(externalHandle);
}
