package org.springframework.beans.factory.config;

import org.springframework.beans.BeansException;

/**
 * Factory hook that allows for custom modification of new bean instances,
 * e.g. checking for marker interfaces or wrapping them with proxies.
 *
 * <p>ApplicationContexts can autodetect BeanPostProcessor beans in their
 * bean definitions and apply them to any beans subsequently created.
 * Plain bean factories allow for programmatic registration of post-processors,
 * applying to all beans created through this factory.
 *
 * <p>Typically, post-processors that populate beans via marker interfaces
 * or the like will implement {@link #postProcessBeforeInitialization},
 * while post-processors that wrap beans with proxies will normally
 * implement {@link #postProcessAfterInitialization}.
 *
 * @author Juergen Hoeller
 * @since 10.10.2003
 * @see InstantiationAwareBeanPostProcessor
 * @see DestructionAwareBeanPostProcessor
 * @see ConfigurableBeanFactory#addBeanPostProcessor
 * @see BeanFactoryPostProcessor
 */
public interface BeanPostProcessor {

	/**
	 * Apply this BeanPostProcessor to the given new bean instance <i>before</i> any bean
	 * initialization callbacks (like InitializingBean's {@code afterPropertiesSet}
	 * or a custom init-method). The bean will already be populated with property values.
	 * The returned bean instance may be a wrapper around the original.
	 * @param bean the new bean instance
	 * @param beanName the name of the bean
	 * @return the bean instance to use, either the original or a wrapped one; if
	 * {@code null}, no subsequent BeanPostProcessors will be invoked
	 * @throws org.springframework.beans.BeansException in case of errors
	 * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet
	 */
	Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException;

	/**
	 * Apply this BeanPostProcessor to the given new bean instance <i>after</i> any bean
	 * initialization callbacks (like InitializingBean's {@code afterPropertiesSet}
	 * or a custom init-method). The bean will already be populated with property values.
	 * The returned bean instance may be a wrapper around the original.
	 * <p>In case of a FactoryBean, this callback will be invoked for both the FactoryBean
	 * instance and the objects created by the FactoryBean (as of Spring 2.0). The
	 * post-processor can decide whether to apply to either the FactoryBean or created
	 * objects or both through corresponding {@code bean instanceof FactoryBean} checks.
	 * <p>This callback will also be invoked after a short-circuiting triggered by a
	 * {@link InstantiationAwareBeanPostProcessor#postProcessBeforeInstantiation} method,
	 * in contrast to all other BeanPostProcessor callbacks.
	 * @param bean the new bean instance
	 * @param beanName the name of the bean
	 * @return the bean instance to use, either the original or a wrapped one; if
	 * {@code null}, no subsequent BeanPostProcessors will be invoked
	 * @throws org.springframework.beans.BeansException in case of errors
	 * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet
	 * @see org.springframework.beans.factory.FactoryBean
	 */
	Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException;

}

public class Consumer {

    public static void main(String[] args) throws InterruptedException, MQClientException {

        // Instantiate with specified consumer group name.
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_rename_unique_group_name");
         
        // Specify name server addresses.
        consumer.setNamesrvAddr("localhost:9876");
        
        // Subscribe one more more topics to consume.
        consumer.subscribe("TopicTest", "*");
        // Register callback to execute on arrival of messages fetched from brokers.
        consumer.registerMessageListener(new MessageListenerConcurrently() {

            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                ConsumeConcurrentlyContext context) {
                System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

        //Launch the consumer instance.
        consumer.start();

        System.out.printf("Consumer Started.%n");
    }
}

@Log4j2
@Service
@RocketMQMessageListener(
	topic = "greetings-topic",
	consumerGroup = "simple-group"
)
class SimpleConsumer implements RocketMQListener<Greeting> {

	@Override
	public void onMessage(Greeting greeting) {
		log.info(greeting.toString());
	}
}

public class RocketMQTransactionAnnotationProcessor
    implements BeanPostProcessor, Ordered, ApplicationContextAware {
    private final static Logger log = LoggerFactory.getLogger(RocketMQTransactionAnnotationProcessor.class);

    private ApplicationContext applicationContext;
    private final Set<Class<?>> nonProcessedClasses =
        Collections.newSetFromMap(new ConcurrentHashMap<Class<?>, Boolean>(64));

    private TransactionHandlerRegistry transactionHandlerRegistry;

    public RocketMQTransactionAnnotationProcessor(TransactionHandlerRegistry transactionHandlerRegistry) {
        this.transactionHandlerRegistry = transactionHandlerRegistry;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        if (!this.nonProcessedClasses.contains(bean.getClass())) {
            Class<?> targetClass = AopUtils.getTargetClass(bean);
            RocketMQTransactionListener listener = AnnotationUtils.findAnnotation(targetClass, RocketMQTransactionListener.class);
            this.nonProcessedClasses.add(bean.getClass());
            if (listener == null) { // for quick search
                log.trace("No @RocketMQTransactionListener annotations found on bean type: {}", bean.getClass());
            } else {
                try {
                    processTransactionListenerAnnotation(listener, bean);
                } catch (MQClientException e) {
                    log.error("Failed to process annotation " + listener, e);
                    throw new BeanCreationException("Failed to process annotation " + listener, e);
                }
            }
        }

        return bean;
    }

    private void processTransactionListenerAnnotation(RocketMQTransactionListener listener, Object bean)
        throws MQClientException {
        if (transactionHandlerRegistry == null) {
            throw new MQClientException("Bad usage of @RocketMQTransactionListener, " +
                "the class must work with RocketMQTemplate", null);
        }
        if (!RocketMQLocalTransactionListener.class.isAssignableFrom(bean.getClass())) {
            throw new MQClientException("Bad usage of @RocketMQTransactionListener, " +
                "the class must implement interface RocketMQLocalTransactionListener",
                null);
        }
        TransactionHandler transactionHandler = new TransactionHandler();
        transactionHandler.setBeanFactory(this.applicationContext.getAutowireCapableBeanFactory());
        transactionHandler.setName(listener.txProducerGroup());
        transactionHandler.setBeanName(bean.getClass().getName());
        transactionHandler.setListener((RocketMQLocalTransactionListener) bean);
        transactionHandler.setCheckExecutor(listener.corePoolSize(), listener.maximumPoolSize(),
                listener.keepAliveTime(), listener.blockingQueueSize());

        RPCHook rpcHook = RocketMQUtil.getRPCHookByAkSk(applicationContext.getEnvironment(),
            listener.accessKey(), listener.secretKey());

        if (Objects.nonNull(rpcHook)) {
            transactionHandler.setRpcHook(rpcHook);
        } else {
            log.debug("Access-key or secret-key not configure in " + listener + ".");
        }

        transactionHandlerRegistry.registerTransactionHandler(transactionHandler);
    }

    @Override
    public int getOrder() {
        return LOWEST_PRECEDENCE;
    }

}

package org.springframework.beans.factory;


public interface FactoryBean<T> {

	
	T getObject() throws Exception;

	
	Class<?> getObjectType();

	
	boolean isSingleton();

}