SpringBoot整合 RabbitMQ

SpringBoot整合 RabbitMQ

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建springboot项目时导入springboot整合rabbitmq依赖包

1,生产者

• application.yml配置文件

spring:
  rabbitmq:
    port: 5672
    password: root
    username: root
    virtual-host: /pms
    host: localhost
    template:
      mandatory: true   #没有投递到队列，强制将消息退回给生产者
    publisher-confirm-type: correlated
    publisher-returns: true

• RabbitConfig.java

@Configuration
public class RabbitConfg {
     

    //开启确认，返回
    RabbitTemplate.ConfirmCallback confirmCallback = new RabbitTemplate.ConfirmCallback() {
     
        @Override
        public void confirm(CorrelationData correlationData, boolean b, String s) {
     
            System.out.println("消息的Id：" + correlationData.getId());
            if(!b){
     
                System.out.println("拒收消息的原因：" + s);
            }
        }
    };
    RabbitTemplate.ReturnCallback returnCallback = new RabbitTemplate.ReturnCallback() {
     
        @Override
        public void returnedMessage(Message message, int i, String s, String s1, String s2) {
     
            System.out.println("-------------------------------------");
            System.out.println("消息的主体：" + new String(message.getBody()));
            System.out.println("错误码：" + i);
            System.out.println("错误的消息：" +s );
            System.out.println("交换机：" +s1);
            System.out.println("路由Key: " +s2);
            System.out.println("-------------------------------------");
        }
    };

    //配置交换机
    @Bean
    public TopicExchange topicExchange(){
     
        return new TopicExchange("topic_exchange");
    }
    @Bean
    public TopicExchange orderExchange(){
     
        return new TopicExchange("order_exchange");
    }

    //对象要用消息转换器(自动注入，需要导入jackson-databind包)
    @Bean
    public MessageConverter messageConverter(){
     
        return new Jackson2JsonMessageConverter();
    }

    @Bean
    public RabbitTemplate rabbitTemplate(ConnectionFactory factory){
     
        RabbitTemplate rabbitTemplate = new RabbitTemplate();
        //设置连接工厂
        rabbitTemplate.setConnectionFactory(factory);
        //设置消息转换器
        rabbitTemplate.setMessageConverter(messageConverter());
        //找不到投递的队列，将消息强制退回给生产者
        rabbitTemplate.setMandatory(true);
        //设置确认机制
        rabbitTemplate.setConfirmCallback(confirmCallback);
        //设置返回机制
        rabbitTemplate.setReturnCallback(returnCallback);
        return rabbitTemplate;
    }

}

• 生产者

@Component
public class OrderProducer {
     

    @Autowired
    RabbitTemplate rabbitTemplate;

    public void sendOrder(String exchange, String routingKey, OrderDto orderDto){
     
        CorrelationData data = new CorrelationData(orderDto.getOrderSn());
        //参数data使用来发送消息的附加参数，用来自定消息id
        rabbitTemplate.convertAndSend(exchange,routingKey,orderDto,data);

    }

}

2,消费者

• 配置手动签收

spring:
  rabbitmq:
    port: 5672
    username: root
    password: root
    virtual-host: /pms
    host: localhost
    listener:
      simple:
        acknowledge-mode: manual  # 手动签收

消息转换器

@Configuration
public class rabbitConfig implements RabbitListenerConfigurer {
     

    @Override
    public void configureRabbitListeners(RabbitListenerEndpointRegistrar registrar) {
     
        //注册消息处理器工厂
        registrar.setMessageHandlerMethodFactory(messageHandlerMethodFactory());
    }

    //消息处理器方法工厂
    @Bean
    public MessageHandlerMethodFactory messageHandlerMethodFactory(){
     
        DefaultMessageHandlerMethodFactory factory = new DefaultMessageHandlerMethodFactory();
        //设置消息转换器
        factory.setMessageConverter(messageConverter());
        return factory;
    }

    //消息反序列化
    @Bean
    public MappingJackson2MessageConverter messageConverter(){
     
        return new MappingJackson2MessageConverter();
    }

}

• 消费者注解方式

@Component
public class MsgConsumer {
     

    @RabbitListener(bindings = {
     
            @QueueBinding(
                    value = @Queue(value = "msg_queue",declare = "true",durable = "true",exclusive = "false",autoDelete = "false"),
                    exchange = @Exchange(value = "topic_exchange",durable = "true",autoDelete = "false",type = "topic",declare = "true"),
                    key = "msg.#"
            )
    })
    @RabbitHandler//处理消息的消费者
    //@Payload要处理的消息对象
   public void processMsg(@Payload String msg, Channel channel, @Headers Map header){
     
        System.out.println("消费者处理消息：" + msg);
        //签收消息要先获取消息的id
        Long tag = (Long) header.get(AmqpHeaders.DELIVERY_TAG);
        try {
     
            //签收
            channel.basicAck(tag,false);
        } catch (IOException e) {
     
            e.printStackTrace();
        }
    }

}

• 消费者方法对象绑定方式

@Component
public class OrderConsumer {
     

    //队列
    @Bean
    public Queue orderQueue(){
     
        return new Queue("order_queue",true,false,false);
    }
    //交换机
    @Bean
    public TopicExchange orderExchange(){
     
        return new TopicExchange("order_exchange");
    }
    //绑定队列到交换机
    @Bean
    public Binding binding(){
     
        return BindingBuilder.bind(orderQueue()).to(orderExchange()).with("order.#");
    }

    @RabbitListener(queues = "order_queue")
    @RabbitHandler
   public void proccessOrder(@Payload OrderDto orderDto, Channel channel, @Headers Map header){
     
        System.out.println("消费者处理消息：" + orderDto.getOrderSn()+":" +orderDto.getCreatTime());
        //签收消息
        Long tag = (Long) header.get(AmqpHeaders.DELIVERY_TAG);
        try {
     
            channel.basicAck(tag,false);
        } catch (IOException e) {
     
            e.printStackTrace();
        }
    }

}