start kafka consumer once event is completed

Question

My Spring boot application does two task

1. Initialise cache
2. kafka consumer

Already have a ApplicationEvent for cache initialisation and I want consumer to start listening the messages once cache initialisation is completed.

Answer 1

If you are using @KafkaListener, give it an id and set autoStartup to false.

When you are ready, use the KafkaListenerEndpointRegistry bean to start the container.

registry.getMessageListenerContainer("myId").start().

If you are using a listener container bean, set its autoStartup to false and start() it when ready.