RabbitMQ学习04--基本工作模式(SpringBoot方式)

使用SpringBoot方式开发RabbitMQ。

1、使用IDEA建立SpringBoot项目，并添加相关引用：

POM文件如下：

<?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>2.5.6</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.yas</groupId>
    <artifactId>RabbitMQBoot</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>RabbitMQBoot</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.amqp</groupId>
            <artifactId>spring-rabbit-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2、编写配置文件：

application.yml文件：

spring:
  rabbitmq:
    host: localhost
    port: 5672
    username: username
    password: password
    virtual-host: /

3、编写配置类：

package com.yas.rabbitmqboot.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 RabbitMQConfig {
    //1 创建exchange - topic
    @Bean
    public TopicExchange getTopicExchange() {
        return new TopicExchange("boot-topic-exchange", true, false);
    }

    //2 创建queue
    @Bean
    public Queue getQueue() {
        return new Queue("boot-queue", true, false, false, null);
    }

    //3 绑定在一起
    @Bean
    public Binding getBinding(TopicExchange topicExchange, Queue queue) {
        return BindingBuilder.bind(queue).to(topicExchange).with("*.red.*");
    }
}

4、生产者代码：

package com.yas.rabbitmqboot;

import org.junit.jupiter.api.Test;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class RabbitMqBootApplicationTests {
    @Autowired
    RabbitTemplate rabbitTemplate;

    @Test
    void contextLoads() {
        rabbitTemplate.convertAndSend("boot-topic-exchange","slow.red.dog","慢红狗");
        System.out.println("消息已生产");
    }
}

5、消费者代码：

package com.yas.rabbitmqboot.listen;

import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Component
public class Consumer {
    @RabbitListener(queues = "boot-queue")
    public void getMessage(Object message) {
        System.out.println("接收到消息：" + message);
    }
}

6、手动ack的方法：

修改第2步的配置文件增加如下内容：

spring:
  rabbitmq:
    listener:
      simple:
        acknowledge-mode: manual #手动提交ack

修改第5步消费者代码：

package com.yas.rabbitmqboot.listen;

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import java.io.IOException;

@Component
public class Consumer {
    //自动ack
//    @RabbitListener(queues = "boot-queue")
//    public void getMessage(Object message) {
//        System.out.println("接收到消息：" + message);
//    }

    //手动ack
    @RabbitListener(queues = "boot-queue")
    public void getMessage(String msg, Channel channel, Message message) throws IOException {
        System.out.println("接收到消息：" + msg);
        //手动ack
        channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
    }
}