private void SubscriberHandler(IServerEventStream stream, IEventStreamSubscriber subscriber, IEventStreamBranch branch, object cookie)
{
IEventStreamSubscriptionRequest request = subscriber.Subscription;
// log the subscriber
LogMessage($"New subscriber {request.Caller} {request.SubscriptionContext.Arguments.AsString()}");
// push an 'image' to that subscriber which is received *only* by it (last image pattern)
// this will be received as an OOB data - see the demo subscriber code
subscriber.Push(cb =>
cb.AddValue("SubscribersAsImage", _glue.AGMObjectSerializer.Serialize(stream.GetBranches()
.SelectMany(b =>
b.GetSubscribers().Select(sb => sb.Subscription.Caller)))));
// e.g. keep the subscriptions in a list
var subscriptionItem = $"{request.Caller.ApplicationName} {request.SubscriptionContext.Arguments.AsString()}";
DispatchAction(() =>
{
ListViewSubscriptions.Items.Add(subscriptionItem);
ListViewSubscriptions.ScrollIntoView(subscriptionItem);
});
}
