RabbitMQ手动签收消息

这里讲解SpringBoot使用RabbitMQ进行有回调的用法和消费者端手动签收消息的用法。

1、pom依赖

xml 复制代码

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/>
    </parent>
    <groupId>com.example.demo</groupId>
    <artifactId>rabbitmq-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>rabbitmq-demo</name>
    <description>rabbitmq-demno</description>
    <properties>
        <java.version>8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2、配置文件

yaml 复制代码

server:
  port: 9090
spring:
  application:
    name: rabbit-confirm
  rabbitmq:
    template:
      # 使用return-callback时必须设置mandatory为true
      mandatory: true
    # 消息发送到交换机确认机制,是否确认回调
    publisher-confirm-type: correlated
    # 消息发送到交换机确认机制，是否返回回调
    publisher-returns: true
    listener:
      simple:
        # 并发消费者初始化值
        concurrency: 5
        # 最大值
        max-concurrency: 10
        # 每个消费者每次监听时可拉取处理的消息数量
        prefetch: 20
        # 确认模式设置为手动签收
        acknowledge-mode: manual
    username: zsx242030
    password: zsx242030
    virtual-host: /

3、定义配置类

java 复制代码

package com.example.demo.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ConfirmConfiguration {

    /**
     * 声明confirm.message队列
     */
    @Bean
    public Queue confirmQueue() {
        return new Queue("confirm.message");
    }

    /**
     * 声明一个名为exchange-2的交换机
     */
    @Bean
    public TopicExchange exchange2() {
        return new TopicExchange("exchange-2");
    }

    /**
     * 将confirm.message的队列绑定到exchange-2交换机
     */
    @Bean
    public Binding bindMessage1() {
        return BindingBuilder.bind(confirmQueue()).to(exchange2()).with("confirm.message");
    }
}

4、定义生产者

java 复制代码

package com.example.demo.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageBuilder;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.sql.Timestamp;
import java.time.LocalDateTime;

@Component
@Slf4j
public class ConfirmProducer {

    @Resource
    private RabbitTemplate rabbitTemplate;

    /**
     * 如果消息没有到exchange,则confirm回调,ack=false
     * 如果消息到达exchange,则confirm回调,ack=true
     * exchange到queue成功,则不回调return
     * exchange到queue失败,则回调return(需设置mandatory=true,否则不回回调,消息就丢了)
     */
    private final RabbitTemplate.ConfirmCallback confirmCallback = (correlationData, ack, cause) -> {
        if (!ack) {
            log.error("消息发送失败：correlationData: {},cause: {}", correlationData, cause);
        } else {
            log.info("消息发送成功：correlationData: {},ack: {}", correlationData, ack);
        }
    };

    private final RabbitTemplate.ReturnCallback returnCallback = (message, replyCode, replyText, exchange, routeKey) ->
            log.error("消息丢失: exchange: {},routeKey: {},replyCode: {},replyText: {}", exchange, routeKey, replyCode, replyText);

    /**
     * 发送消息
     *
     * @param message 消息内容
     */
    public void send(String message) {
        // 构建回调返回的数据
        CorrelationData correlationData = new CorrelationData();
        Timestamp time = Timestamp.valueOf(LocalDateTime.now());
        correlationData.setId(time + "");
        Message message1 = MessageBuilder.withBody(message.toString().getBytes())
                .setContentType(MessageProperties.CONTENT_TYPE_TEXT_PLAIN)
                // 将CorrelationData的id 与 Message的correlationId绑定，然后关系保存起来,然后人工处理
                .setCorrelationId(correlationData.getId())
                .build();
        rabbitTemplate.setConfirmCallback(confirmCallback);
        rabbitTemplate.setReturnCallback(returnCallback);
        rabbitTemplate.convertAndSend("exchange-2", "confirm.message", message1, correlationData);
    }
}

5、定义消费者

java 复制代码

package com.example.demo.config;

import com.rabbitmq.client.Channel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
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.stereotype.Component;

import java.io.IOException;

@Component
@Slf4j
public class ConfirmConsumer {

    @RabbitListener(
            bindings = @QueueBinding(value = @Queue(value = "confirm.message",durable = "true"),
                    exchange = @Exchange(value = "exchange-2",type = "topic"),
                    key = "confirm.message"))
    public void receive(String message, Message message1, Channel channel) throws IOException {
        log.info("消费者收到消息：{}", message);
        long deliverTag = message1.getMessageProperties().getDeliveryTag();
        //第一个deliveryTag参数为每条信息带有的tag值，第二个multiple参数为布尔类型
        //为true时会将小于等于此次tag的所有消息都确认掉，如果为false则只确认当前tag的信息，可根据实际情况进行选择。
        channel.basicAck(deliverTag, false);
    }
}

6、创建controller调用

java 复制代码

package com.example.demo.controller;

import com.example.demo.config.ConfirmProducer;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;

@RestController
public class ConfirmController {

    @Resource
    private ConfirmProducer confirmProducer;

    @GetMapping("/confirm-message")
    public void confirmMessage() {
        confirmProducer.send("hello confirm message");
    }
}

7、启动类

java 复制代码

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class RabbitDemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(RabbitDemoApplication.class, args);
	}

}

8、测试

elixir 复制代码

http://localhost:9090/confirm-message

elixir 复制代码

2022-07-05 18:20:43.043  INFO 4492 --- [nectionFactory1] com.example.demo.config.ConfirmProducer  : 消息发送成功：correlationData: CorrelationData [id=2022-07-05 18:20:43.025],ack: true
2022-07-05 18:20:43.046  INFO 4492 --- [ntContainer#0-5] com.example.demo.config.ConfirmConsumer  : 消费者收到消息：hello confirm message