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如果你注定要成为厉害的人, 那问题的答案就深藏在你的血脉里。

本篇文章主要讲述Spring Boot与RabbitMQ的整合。因为我们公司的云服务用到了RabbitMQ 技术,之前都是自己封装,正好我们也正在往SpringBoot转变,这个技术正好用到,看来代码又要重构咯。

有想了解重构的朋友,我之前也有对《重构》一书的解读,出门左转就能看到。


导包:

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

消息生产者

ConnectionFactory配置
创建AmqpConfig文件AmqpConfig.java(后期的配置都在该文件中)

package cn.usr.springbootrabbitmq;

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.*;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.core.ChannelAwareMessageListener;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;

/**
 * @program: Learn-SpringBootRabbitmq
 * @author: Rock 【shizhiyuan@usr.cn】
 * @Date: 2018/2/23 0023
 */
@Configuration
public class AmqpConfig {
    public static final String EXCHANGE = "spring-boot-exchange2";
    public static final String ROUTINGKEY = "spring-boot-routingKey2";


    @Bean
    public CachingConnectionFactory connectionFactory() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        connectionFactory.setAddresses("127.0.0.1");
        connectionFactory.setUsername("guest");
        connectionFactory.setPassword("guest");
        connectionFactory.setVirtualHost("/");
        // 这里需要显示调用才能进行消息的回调  必须要设置
        connectionFactory.setPublisherConfirms(true);
        return connectionFactory;
    }

  

RabbitTemplate

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate template = new RabbitTemplate(connectionFactory());
        return template;
    }

这里设置为原型,具体的原因在后面会讲到,在发送消息时通过调用RabbitTemplate中的如下方法:
一会调用的时候用:

 public void convertAndSend(String exchange, String routingKey, Object object, CorrelationData correlationData) 

Producer

调用啦:

package cn.usr.springbootrabbitmq;

import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.support.CorrelationData;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.UUID;

/**
 * @program: Learn-SpringBootRabbitmq
 * @author: Rock 【shizhiyuan@usr.cn】
 * @Date: 2018/2/23 0023
 */
@Component
public class Producer implements RabbitTemplate.ConfirmCallback {
    private RabbitTemplate rabbitTemplate;


    /**
     * 构造方法注入
     */
    @Autowired
    public Producer(RabbitTemplate rabbitTemplate) {
        this.rabbitTemplate = rabbitTemplate;
        //这是是设置回调能收到发送到响应,confirm()在下面解释
        rabbitTemplate.setConfirmCallback(this);
    }

    public void sendMsg(String content) {
        CorrelationData correlationId = new CorrelationData(UUID.randomUUID().toString());
        //convertAndSend(exchange:交换机名称,routingKey:路由关键字,object:发送的消息内容,correlationData:消息ID)
        rabbitTemplate.convertAndSend(AmqpConfig.EXCHANGE, AmqpConfig.ROUTINGKEY, content, correlationId);
    }

    @Override
    public void confirm(CorrelationData correlationData, boolean ack, String cause) {
        System.out.println(" 回调id:" + correlationData);
        if (ack) {
            System.out.println("消息成功消费");
        } else {
            System.out.println("消息消费失败:" + cause);
        }
    }
}

如果需要在生产者需要消息发送后的回调,需要对rabbitTemplate设置ConfirmCallback对象,由于不同的生产者需要对应不同的ConfirmCallback,如果rabbitTemplate设置为单例bean,则所有的rabbitTemplate实际的ConfirmCallback为最后一次申明的ConfirmCallback。

消息消费者

还是在AmqpConfig.class里面

步骤就是

  1. 声明交换机
  2. 声明队列
  3. 绑定RoutingKey
/**
     * 针对消费者配置
     * 1. 设置交换机类型
     * 2. 将队列绑定到交换机
     * <p>
     * <p>
     * FanoutExchange: 将消息分发到所有的绑定队列,无routingkey的概念
     * HeadersExchange :通过添加属性key-value匹配
     * DirectExchange:按照routingkey分发到指定队列
     * TopicExchange:多关键字匹配
     */
    @Bean
    public DirectExchange defaultExchange() {
        return new DirectExchange(EXCHANGE);
    }

    @Bean
    public Queue queue() {
        return new Queue("spring-boot-queue", true);//队列持久 
    }

    @Bean
    public Binding binding() {
        return BindingBuilder.bind(queue()).to(defaultExchange()).with(AmqpConfig.ROUTINGKEY);
    }


    @Bean
    public SimpleMessageListenerContainer messageContainer() {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionFactory());
        container.setQueues(queue());
        container.setExposeListenerChannel(true);
        container.setMaxConcurrentConsumers(1);
        container.setConcurrentConsumers(1);
        // 设置确认模式手工确认
        container.setAcknowledgeMode(AcknowledgeMode.MANUAL);
        container.setMessageListener(new ChannelAwareMessageListener() {
            @Override
            public void onMessage(Message message, Channel channel) throws Exception {
                byte[] body = message.getBody();
                System.out.println("receive msg : " + new String(body));
                //确认消息成功消费
                channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
            }
        });
        return container;
    }

下面是完整的配置:

package cn.usr.springbootrabbitmq;

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.*;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.core.ChannelAwareMessageListener;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;

/**
 * @program: Learn-SpringBootRabbitmq
 * @author: Rock 【shizhiyuan@usr.cn】
 * @Date: 2018/2/23 0023
 */
@Configuration
public class AmqpConfig {
    public static final String EXCHANGE = "spring-boot-exchange2";
    public static final String ROUTINGKEY = "spring-boot-routingKey2";


    @Bean
    public CachingConnectionFactory connectionFactory() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
        connectionFactory.setAddresses("127.0.0.1");
        connectionFactory.setUsername("guest");
        connectionFactory.setPassword("guest");
        connectionFactory.setVirtualHost("/");
        // 这里需要显示调用才能进行消息的回调  必须要设置
        connectionFactory.setPublisherConfirms(true);
        return connectionFactory;
    }

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate template = new RabbitTemplate(connectionFactory());
        return template;
    }


    /**
     * 针对消费者配置
     * 1. 设置交换机类型
     * 2. 将队列绑定到交换机
     * <p>
     * <p>
     * FanoutExchange: 将消息分发到所有的绑定队列,无routingkey的概念
     * HeadersExchange :通过添加属性key-value匹配
     * DirectExchange:按照routingkey分发到指定队列
     * TopicExchange:多关键字匹配
     */
    @Bean
    public DirectExchange defaultExchange() {
        return new DirectExchange(EXCHANGE);
    }

    @Bean
    public Queue queue() {
        return new Queue("spring-boot-queue", true);
    }

    @Bean
    public Binding binding() {
        return BindingBuilder.bind(queue()).to(defaultExchange()).with(AmqpConfig.ROUTINGKEY);
    }


    @Bean
    public SimpleMessageListenerContainer messageContainer() {
        SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionFactory());
        container.setQueues(queue());
        container.setExposeListenerChannel(true);
        container.setMaxConcurrentConsumers(1);
        container.setConcurrentConsumers(1);
        // 设置确认模式手工确认
        container.setAcknowledgeMode(AcknowledgeMode.MANUAL);
        container.setMessageListener(new ChannelAwareMessageListener() {
            @Override
            public void onMessage(Message message, Channel channel) throws Exception {
                byte[] body = message.getBody();
                System.out.println("receive msg : " + new String(body));
                //确认消息成功消费
                channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
            }
        });
        return container;
    }
}

到这里我就能完成SpringBoot整合RabbitMQ的数据收发了。

结果:

receive msg : ceshi-----?
 回调id:CorrelationData [id=dfe3b3d1-f5a3-42d9-a514-a73729e009d5]
消息成功消费

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参考:http://blog.csdn.net/liaokail...


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