class RocketMqListener implements RocketMQListener<MessageExt> {

    public static final String GROUP = "group";
    public static final String TOPIC = "topic";

    @Override
    public void onMessage(MessageExt message) {<FILL_FUNCTION_BODY>}
}

        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        log.info("message: {}", message);
    
<no_super_class>