package com.jeequan.jeepay.components.mq.vender.rabbitmq.receive;

import com.jeequan.jeepay.components.mq.constant.MQVenderCS;
import com.jeequan.jeepay.components.mq.model.ResetIsvMchAppInfoConfigMQ;
import com.jeequan.jeepay.components.mq.vender.IMQMsgReceiver;
import com.jeequan.jeepay.components.mq.vender.rabbitmq.RabbitMQConfig;
import org.springframework.amqp.core.ExchangeTypes;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.stereotype.Component;

/**
 * rabbitMQ消息接收器：仅在vender=rabbitMQ时 && 项目实现IMQReceiver接口时 进行实例化
 * 业务：  更新服务商/商户/商户应用配置信息
 *
 * @author terrfly
 * @date 2021/7/22 17:06
 */
@Component
@ConditionalOnProperty(name = MQVenderCS.YML_VENDER_KEY, havingValue = MQVenderCS.RABBIT_MQ)
@ConditionalOnBean(ResetIsvMchAppInfoConfigMQ.IMQReceiver.class)
public class ResetIsvMchAppInfoRabbitMQReceiver implements IMQMsgReceiver {

    @Autowired
    private ResetIsvMchAppInfoConfigMQ.IMQReceiver mqReceiver;

    /**
     * 接收 【 MQSendTypeEnum.BROADCAST  】 广播类型的消息
     * <p>
     * 注意：
     * RabbitMQ的广播模式（fanout）交换机 --》全部的Queue
     * 如果queue包含多个消费者， 【例如，manager和payment的监听器是名称相同的queue下的消费者（Consumers） 】， 两个消费者是工作模式且存在竞争关系， 导致只能一个来消费。
     * 解决：
     * 每个topic的QUEUE都声明一个FANOUT交换机， 消费者声明一个系统产生的【随机队列】绑定到这个交换机上，然后往交换机发消息，只要绑定到这个交换机上都能收到消息。
     * 参考： https://bbs.csdn.net/topics/392509262?list=70088931
     **/
    @Override
    @RabbitListener(
            bindings = {@QueueBinding(value = @Queue(), // 注意这里不要定义队列名称,系统会随机产生
                    exchange = @Exchange(name = RabbitMQConfig.FANOUT_EXCHANGE_NAME_PREFIX + ResetIsvMchAppInfoConfigMQ.MQ_NAME,
                            type = ExchangeTypes.FANOUT))})
    public void receiveMsg(String msg) {
        mqReceiver.receive(ResetIsvMchAppInfoConfigMQ.parse(msg));
    }

}
