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springboot整合各种消息队列（二）：rabbitmq消息队列

springboot整合各种消息队列（二）：rabbitmq消息队列本篇博客将介绍使用rabbitmq消息中间件和springboot的整合使用;

安装配置rabbitmq

请参考笔者另一篇博客，有详细介绍： https://jsbintask.cn/2019/01/25/middleware/docker-rabbitmq-install/#more

整合springboot

新建项目

新建一个springboot项目，并且修改application.yml文件，pom如下：

spring:
  rabbitmq:
    host: yourhostaddress
    username: jsbintask
    password: jsbintask

host和password修改成自己的服务器用户名密码。pom：

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>cn.jsbintask</groupId>
    <artifactId>springboot-rabbitmq-learning</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-rabbitmq-learning</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.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>
    </dependencies>

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

</project>

消息消费者（接收者）

编写一个消息消费者类：

@Component
@Log
public class RabbitmqMsgReceiver {
    @Autowired
    private CountDownLatch countDownLatch;

    public void receivedMsg(String msg) {
        log.info("received rabbitmq msg: " + msg);
        countDownLatch.countDown();
    }
}

并且加入@Component注解，将其作为bean归spring管理，并且通过@Autowried注入了一个CountdownLatch类。

配置exchange，queue，route，加入监听：

@Configuration
public class RabbitmqConfig {
    public static final String TOPIC_EXCHANGE_NAME = "jsbintask-exchange";
    public static final String ROUTE_KEY = "cn.jsbintask.key";

    private static final String QUEUE_NAME = "jsbintask-queue";


    @Bean
    public Queue queue() {
        return new Queue(QUEUE_NAME, false);
    }

    @Bean
    public CountDownLatch countDownLatch() {
        return new CountDownLatch(1);
    }

    @Bean
    public TopicExchange exchange() {
        return new TopicExchange(TOPIC_EXCHANGE_NAME);
    }

    /**
     * 将queue和exchange绑定，并且已 route_key暴漏出去
     */
    @Bean
    public Binding binding(Queue queue, TopicExchange exchange) {
        return BindingBuilder.bind(queue).to(exchange).with(ROUTE_KEY);
    }

    @Bean
    public SimpleMessageListenerContainer container(ConnectionFactory connectionFactory,
                                             MessageListenerAdapter listenerAdapter) {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        container.setQueueNames(QUEUE_NAME);
        container.setMessageListener(listenerAdapter);
        return container;
    }

    @Bean
    public MessageListenerAdapter listenerAdapter(RabbitmqMsgReceiver receiver) {
        return new MessageListenerAdapter(receiver, "receivedMsg");
    }
}

启动测试类，发送消息

@SpringBootApplication
@Log
public class SpringbootRabbitmqLearningApplication {

    public static void main(String[] args) throws Exception{
        ConfigurableApplicationContext context = SpringApplication.run(SpringbootRabbitmqLearningApplication.class, args);
        CountDownLatch countDownLatch = context.getBean(CountDownLatch.class);
        RabbitTemplate rabbitTemplate = context.getBean(RabbitTemplate.class);

        log.info("Sending msg....");
        rabbitTemplate.convertAndSend(RabbitmqConfig.TOPIC_EXCHANGE_NAME, RabbitmqConfig.ROUTE_KEY, "hello from jsbintask.");
        countDownLatch.await();

        System.exit(-1);
    }

}

启动，查看rabbitmq控制台以及idea控制台：收到消息并且打印：