Rabbitmq（高级特性）生产端消息可靠投递之confirm_rabbitmq 生产 comfirm

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前言

本文讲述rabbitmq高级特性confirm和return

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提示：以下是本篇文章正文内容，下面案例可供参考

一、原理说明

![在这里插入图

二、创建maven项目并且引入依赖

1.引入rabbitmq和spring内容库

代码如下（示例）：

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zy</groupId>
    <artifactId>rabbitmq-consumer-confirm-spring</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.amqp</groupId>
            <artifactId>spring-rabbit</artifactId>
            <version>2.3.4</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.3.3</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>
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2.创建rabbitmq.properties和rabbitmq-producer-confirm-spring.xml两个配置文件

rabbitmq.properties配置文件：

rabbitmq.host=127.0.0.1	//rabbitmq-server主机地址
rabbitmq.port=5672	//rabbitmq-server端口
rabbitmq.username=zysf01	//用户名
rabbitmq.password=zysf01	//密码
rabbitmq.virtual-host=/zysf	//虚拟机
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producer-confirm-spring.xml配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:rabbit="http://www.springframework.org/schema/rabbit"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/rabbit
       http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">
    <!--加载配置文件-->
    <context:property-placeholder location="classpath:rabbitmq.properties"/>

    <!-- 定义rabbitmq connectionFactory -->
    <rabbit:connection-factory id="connectionFactory" host="${rabbitmq.host}"
                               port="${rabbitmq.port}"
                               username="${rabbitmq.username}"
                               password="${rabbitmq.password}"
                               virtual-host="${rabbitmq.virtual-host}"
                               confirm-type="CORRELATED"
    />
    <!--定义管理交换机、队列-->
    <rabbit:admin connection-factory="connectionFactory"/>

    <!--定义rabbitTemplate对象操作可以在代码中方便发送消息-->
    <rabbit:template id="rabbitTemplate" connection-factory="connectionFactory"/>

    <!--消息的可靠性投递（生产端）-->
    <rabbit:queue id="test_queue_confirm" name="test_queue_confirm"></rabbit:queue>
    <rabbit:direct-exchange name="test_exchange_confirm">
        <rabbit:bindings>
            <rabbit:binding queue="test_queue_confirm" key="confirm"></rabbit:binding>
        </rabbit:bindings>
    </rabbit:direct-exchange>
</beans>
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1.接下来我们需要在配置文件rabbitmq-producer-confirm-spring.xml中激活confirm功能，在rabbit:connection-factory标签中添加confirm-type=“CORRELATED”，老版本添加publisher-confirms=“true”
2.给rabbitTemplate设置回调函数，并实现confirm方法

 @Test
    public void testConfirm() {

        rabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            //confirm(CorrelationData correlationData,  发送消息时可以设置配置信息，这里就是那个信息
            //                              boolean b,  ack代表是否成功收到消息
            //                              String s)   cause代表失败的原因
            @Override
            public void confirm(CorrelationData correlationData, boolean b, String s) {
                System.out.println("confirm方法被执行了...");
            }
        });

        //发送消息
        rabbitTemplate.convertAndSend("test_exchange_confirm","confirm","message confirm...");

    }
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总结

提示：
1.创建maven项目
2.在rabbitmq.properties配置文件中配置rabbitmq-server服务链接参数
3.在rabbitmq-producer-confirm-spring.xml配置文件中配置exchange和queue
4.接下来我们需要在配置文件rabbitmq-producer-confirm-spring.xml中激活confirm功能，在rabbit:connection-factory标签中添加confirm-type=“CORRELATED”，老版本添加publisher-confirms=“true”
5.给rabbitTemplate设置回调函数，并实现confirm方法
6.注意测试时需要引入rabbitmq-producer-confirm-spring.xml配置文件

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:rabbitmq-producer-confirm-spring.xml")
public class ConfirmTest {
    @Autowired
    private RabbitTemplate rabbitTemplate;
    /**
     * 确认模式：
     *  1.确认模式开启：ConnectionFactory中开启publisher-confirms="true"|新版本中ConnectionFactory中开启confirm-type="CORRELATED"
     *  2.在rabbitTemplate中定义回调函数
     *
     */
    @Test
    public void testConfirm() {

        rabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            //confirm(CorrelationData correlationData,  发送消息时可以设置配置信息，这里就是那个信息
            //                              boolean b,  ack代表是否成功收到消息
            //                              String s)   cause代表失败的原因
            @Override
            public void confirm(CorrelationData correlationData, boolean b, String s) {
                System.out.println("confirm方法被执行了...");
            }
        });
        //发送消息
       rabbitTemplate.convertAndSend("test_exchange_confirm","confirm","message confirm...");
    }
}
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