#RabbitListener (having id set) not registered with RabbitListenerEndpointRegistry - spring

Question

I am using #RabbitListener to consume a message from RabbitMQ. I want to have the ability to pause/resume the message consume process based on some a threshold.
As per this and this SO posts, I could be able to use RabbitListenerEndpointRegistry and get the list of containers and pause/resume consuming based on need. I also understand that to be able to register to RabbitListenerEndpointRegistry, I need to specify an id to #RabbitListener annotation.
However, I have add an id to #RabbitListener annotation and still RabbitListenerEndpointRegistry.getListenerContainers() returns me a empty collection.
I am not sure, what could be the issue due to which i could not get the ListenerContainers collection.
Here is now I create the SimpleRabbitListenerContainerFactory. ( I use SimpleRabbitListenerContainerFactory because I need to consume from different queues)
public static SimpleRabbitListenerContainerFactory getSimpleRabbitListenerContainerFactory(
final ConnectionFactory connectionFactory,
final Jackson2JsonMessageConverter jsonConverter,
final AmqpAdmin amqpAdmin,
final String queueName, final String bindExchange,
final String routingKey, final int minConsumerCount,
final int maxConsumerCount, final int msgPrefetchCount,
final AcknowledgeMode acknowledgeMode) {
LOGGER.info("Creating SimpleRabbitListenerContainerFactory to consume from Queue '{}', " +
"using {} (min), {} (max) concurrent consumers, " +
"prefetch count set to {} and Ack mode is {}",
queueName, minConsumerCount, maxConsumerCount, msgPrefetchCount, acknowledgeMode);
/**
* Before creating the connector factory, ensure that the model with appropriate
* binding exists.
*/
createQueueAndBind(amqpAdmin, bindExchange, queueName, routingKey);
// Create listener factory
SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
// set connection factory
factory.setConnectionFactory(connectionFactory);
// set converter
factory.setMessageConverter(jsonConverter);
// set false so that if model is missing the app will not crash
factory.setMissingQueuesFatal(false);
// set min concurrent consumer
factory.setConcurrentConsumers(minConsumerCount);
// set max concurrent consumer
factory.setMaxConcurrentConsumers(maxConsumerCount);
// how many message should be fetched in a go
factory.setPrefetchCount(msgPrefetchCount);
// set acknowledge mode to auto
factory.setAcknowledgeMode(acknowledgeMode);
// captures the error on consumer side if any error
factory.setErrorHandler(errorHandler());
return factory;
}
#RabbitListener annotation declaration on a method
#RabbitListener(queues = "${object.scan.queue-name}",
id = "object-scan",
containerFactory = "object.scan")

Answer 1

/**
* Before creating the connector factory, ensure that the model with appropriate
* binding exists.
*/
createQueueAndBind(amqpAdmin, bindExchange, queueName, routingKey);
You should not be doing this during the bean definition phase; it's too early in the application context's lifecycle.
All you need to do is add the queue/exchange/binding #Beans to the application context and Spring (RabbitAdmin) will automatically do the declarations when the container is first started.