将请求参数数据推送至RabbitMQ队列中并且捕捉消息没有到达交换机的异常

1：自定义mq信息类（我的交换这些信息都从nacos上直接取的，怎么从nacos取配置信息看上篇文章）：

java 复制代码

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class MqInfoEntity implements Serializable {

    private static final long serialVersionUID = 1L;


    /**
     * 交换机类型(0:DIRECT直连交换机; 1:TOPIC主题交换机; 2:FANOUT扇形交换机; 3:HEADERS头交换机)
     */
    private Integer exchangeType;

    /**
     * 交换机名称
     */
    private String exchangeName;

    /**
     * 队列名称
     */
    private String queueName;

    /**
     * 绑定关系
     */
    private String routingKey;
}

2：自定义生产者类：

java 复制代码

import com.alibaba.fastjson.JSONArray;
import com.fescotech.ordercommon.model.MqInfoEntity;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;

@Component
@Slf4j
public class SendRequestParamsProducer implements RabbitTemplate.ConfirmCallback,RabbitTemplate.ReturnCallback{

    @Autowired
    private RabbitTemplate rabbitTemplate;

    //这两个变量是用来将交换机发送消息失败异常的原因在service里抛异常用
    public  boolean ack1 = true;
    public String reason;

    @PostConstruct
    public void init() {
        rabbitTemplate.setConfirmCallback(this);
        rabbitTemplate.setReturnCallback(this);
        rabbitTemplate.setMandatory(true);
    }


    @Override
    public void confirm(CorrelationData correlationData, boolean ack, String cause) {
        String deliveryNumber = correlationData.getId();
        if (ack){
            ack1=true;
            //记录发送记录
            log.info("向交换机发送消息成功，派单编号：{}",deliveryNumber);
        } else {
            ack1=false;
            reason = cause;
            log.error("向交换机发送消息失败，派单编号：{}，原因为：{},", deliveryNumber, cause);
        }
    }

    /**
     * 推送消息
     * @author fu
     * @time 2023/7/18 14:28
     * @param mqInfoEntity
     * @param data为要推送的数据
     * @param correlationDataId调用时赋值一个唯一值就行
     * @return void
     */
    public void sendRabbitMq(MqInfoEntity mqInfoEntity, JSONArray data ,String correlationDataId) {
       //  rabbitTemplate.convertAndSend(mqInfoEntity.getExchangeName(), mqInfoEntity.getRoutingKey(), data, new CorrelationData(correlationDataId));
        rabbitTemplate.convertSendAndReceive(mqInfoEntity.getExchangeName(), mqInfoEntity.getRoutingKey(), data, new CorrelationData(correlationDataId));
    }

    @Override
    public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) {
        String json = new String(message.getBody());
        log.info("消息本身：" + json);
        log.info("退回的replyCode是：" + replyCode);
        log.info("退回的replyText是：" + replyText);
        log.info("退回的exchange是：" + exchange);
        log.info("退回的routingKey是：" + routingKey);
        String errorDesc = "未匹配到队列,交换机:"+ exchange +",routingKey:"+ routingKey;
    }
}

3：逻辑推送数据至mq（前三步是我个人需求业务处理，你们可以从第四步看）：

java 复制代码

import cn.hutool.json.JSONUtil;
import com.alibaba.fastjson.JSONArray;
import com.fescotech.ft.common.model.vo.Result;
import com.fescotech.ft.common.util.FtResultUtil;
import com.fescotech.ordercommon.constants.ExchangeTypeEnum;
import com.fescotech.ordercommon.model.MqInfoEntity;
import com.fescotech.ordercommon.model.param.SendMsgParam;
import com.fescotech.orderservice.config.limit.CommonMqMsgConfig;
import com.fescotech.orderservice.mq.producer.SendRequestParamsProducer;
import com.fescotech.orderservice.service.CommonMqMsgService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Map;


@Service
@Slf4j
public class CommonMqMsgServiceImpl implements CommonMqMsgService {

    @Autowired
    private SendRequestParamsProducer sendRequestParamsProducer;
    @Autowired
    private CommonMqMsgConfig commonMqMsgConfig;

    @Override
    public Result sendMsg(SendMsgParam sendMsgParam) {
        //1.拼接faceCode_sysChannel
        String faceCodeSysChannel = sendMsgParam.getFaceCode()+"_"+sendMsgParam.getSysChannel();
        //2.获取nacos配置文件
        Map<String,CommonMqMsgConfig.SystemMap> map = commonMqMsgConfig.getSystemMap();
        //3.校验faceCode_sysChannel在nacos上是否有配置
        if(!map.keySet().contains(faceCodeSysChannel)){
            return FtResultUtil.result(Result.FAIL,null,"未找到"+sendMsgParam.getFaceCode()+"_"+sendMsgParam.getSysChannel()+"配置",null);
        }

        //4.将要推送的数据转至json串（我要推送json串，你们推啥数据用啥数据就行）
        JSONArray jsonArray = JSONArray.parseArray(sendMsgParam.getRequestParams()) ;
        log.info("发送数据：{}",jsonArray);
        //5.取mq队列数据（我这是从nacos上取交换机名称、队列名称、绑定关系值，你们有现成的直接在第6步赋值即可）
        CommonMqMsgConfig.SystemMap systemMap = map.get(faceCodeSysChannel);
        //6.构建发送信息
        MqInfoEntity mqInfoEntity = MqInfoEntity.builder().exchangeName(systemMap.getExchange_name())
                .queueName(systemMap.getQueue_name()).routingKey(systemMap.getRouting_key())
                .exchangeType(ExchangeTypeEnum.TOPIC.getCode())
                .build();
        log.info("推送MQ,{},data:{}", JSONUtil.toJsonStr(mqInfoEntity),jsonArray);
        //7.推送mq
        sendRequestParamsProducer.sendRabbitMq(mqInfoEntity,jsonArray,sendMsgParam.getFaceCode()+"_"+sendMsgParam.getSysChannel());
        //8.捕捉交换机未收到消息异常原因
        boolean flag = sendRequestParamsProducer.ack1;
        if(flag){
            return FtResultUtil.result(Result.SUCCESS, "推送成功", null, null);
        }else {
            log.error("向交换机发送消息失败，编号：{}，原因为：{},", faceCodeSysChannel, sendRequestParamsProducer.reason);
            return FtResultUtil.result(Result.FAIL,null,"推送失败,失败原因："+sendRequestParamsProducer.reason,null);
        }

    }
}

推送成功：