public async Task UnsubscribeAsync(string subject, string queue, INatsMessageListener listener)
{
CheckOpen();
NatsSubscription deletedSubscription = null;
lock (_lock)
{
// Find subscription
for (var index = 0; index < _subscriptions.Count; index++)
{
var subscription = _subscriptions[index];
if (subscription.Subject == subject && subscription.Queue == queue && subscription.Listener == listener)
{
deletedSubscription = subscription;
_subscriptions.RemoveAt(index);
break;
}
}
}
// Unsubscribe if there are no more subscriptions
if (deletedSubscription != null)
{
deletedSubscription.Handler.Unsubscribe();
}
await Task.Delay(0);
}
public async Task SubscribeAsync(string subject, string queue, INatsMessageListener listener)
{
CheckOpen();
// Subscribe to the topic
// Todo: Shall we skip if similar subscription already exist?
var handler = _connection.SubscribeAsync(subject, queue, listener.OnMessage);
lock (_lock)
{
// Add subscription to the list
var subscription = new NatsSubscription
{
Subject = subject,
Listener = listener,
Queue = queue,
Handler = handler
};
_subscriptions.Add(subscription);
}
await Task.Delay(0);
}