@KafkaListener with single Topic and single Partition

I use the spring-kafka annotation @KafkaListener to designate my listener method.

I consume a single topic with a single partition. The messages are never more than one or two a second so a single thread is acceptable. The spring-kafka docs say the @KafkaListener defaults to using a ConcurrentMessageListenerContainer. Is the correct way to control concurrency by using setConcurrency?

Or, should I be somehow create a KafkaMessageListenerContainer, which is single threaded?

I currently use this:

 @Bean("appContainerFactory") KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<Integer, String>> kafkaListenerContainerFactory() { ConcurrentKafkaListenerContainerFactory<Integer, String> factory = new ConcurrentKafkaListenerContainerFactory<>(); factory.setConcurrency(1); ... }