public async Task <IListener> CreateAsync(IFunctionExecutor executor, CancellationToken cancellationToken)
{
// Must create all messaging entities before creating message receivers and calling OnMessage.
// Otherwise, some function could start to execute and try to output messages to entities that don't yet
// exist.
await _namespaceManager.CreateTopicIfNotExistsAsync(_topicName, cancellationToken);
await _namespaceManager.CreateSubscriptionIfNotExistsAsync(_topicName, _subscriptionName,
cancellationToken);
string entityPath = SubscriptionClient.FormatSubscriptionPath(_topicName, _subscriptionName);
ITriggerExecutor <BrokeredMessage> triggerExecutor = new ServiceBusTriggerExecutor(_instanceFactory,
executor);
return(new ServiceBusListener(_messagingFactory, entityPath, triggerExecutor));
}
