public async Task <IEnumerable <string> > GetSubscribers(Type eventType, CancellationToken cancellationToken = default)
{
var topics = GetTopics(eventType);
if (topics.Length == 0)
{
return(Enumerable.Empty <string>());
}
var retrieveTasks = new List <Task <IEnumerable <SubscriptionEntity> > >(topics.Length);
var addresses = new HashSet <string>(StringComparer.OrdinalIgnoreCase);
(_, CloudTable table) = storageAddressingSettings.GetSubscriptionTable(eventType);
foreach (var topic in topics)
{
retrieveTasks.Add(Retrieve(topic, table, cancellationToken));
}
await Task.WhenAll(retrieveTasks).ConfigureAwait(false);
foreach (var retrieveTask in retrieveTasks)
{
var subscriptionEntities = retrieveTask.GetAwaiter().GetResult();
foreach (var subscriptionEntity in subscriptionEntities)
{
addresses.Add(subscriptionEntity.Address);
}
}
return(addresses);
}
