public void registerContainer()

in rocketmq-spring-boot/src/main/java/org/apache/rocketmq/spring/autoconfigure/ListenerContainerConfiguration.java [70:114]
37 lines of code
8 McCabe index (conditional complexity)

    public void registerContainer(String beanName, Object bean, RocketMQMessageListener annotation) {
        Class<?> clazz = AopProxyUtils.ultimateTargetClass(bean);

        if (RocketMQListener.class.isAssignableFrom(bean.getClass()) && RocketMQReplyListener.class.isAssignableFrom(bean.getClass())) {
            throw new IllegalStateException(clazz + " cannot be both instance of " + RocketMQListener.class.getName() + " and " + RocketMQReplyListener.class.getName());
        }

        if (!RocketMQListener.class.isAssignableFrom(bean.getClass()) && !RocketMQReplyListener.class.isAssignableFrom(bean.getClass())) {
            throw new IllegalStateException(clazz + " is not instance of " + RocketMQListener.class.getName() + " or " + RocketMQReplyListener.class.getName());
        }

        String consumerGroup = this.environment.resolvePlaceholders(annotation.consumerGroup());
        String topic = this.environment.resolvePlaceholders(annotation.topic());

        boolean listenerEnabled =
            (boolean) rocketMQProperties.getConsumer().getListeners().getOrDefault(consumerGroup, Collections.EMPTY_MAP)
                .getOrDefault(topic, true);

        if (!listenerEnabled) {
            log.debug(
                "Consumer Listener (group:{},topic:{}) is not enabled by configuration, will ignore initialization.",
                consumerGroup, topic);
            return;
        }
        validate(annotation);

        String containerBeanName = String.format("%s_%s", DefaultRocketMQListenerContainer.class.getName(),
            counter.incrementAndGet());
        GenericApplicationContext genericApplicationContext = (GenericApplicationContext) applicationContext;

        genericApplicationContext.registerBean(containerBeanName, DefaultRocketMQListenerContainer.class,
            () -> createRocketMQListenerContainer(containerBeanName, bean, annotation));
        DefaultRocketMQListenerContainer container = genericApplicationContext.getBean(containerBeanName,
            DefaultRocketMQListenerContainer.class);
        if (!container.isRunning()) {
            try {
                container.start();
            } catch (Exception e) {
                log.error("Started container failed. {}", container, e);
                throw new RuntimeException(e);
            }
        }

        log.info("Register the listener to container, listenerBeanName:{}, containerBeanName:{}", beanName, containerBeanName);
    }