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SpringAMQP交换机:Fanout

作者:互联网

与简单消息队列的区别是允许将同一个消息发布给多个消费者,实现方式说加了交换机exchange。

publisher 。。。。。。。。。。。。。exchange。。。。。。。。。。。queue。。。。。。。。。。。。。。。consumer

exchange负责消息路由,而不是存储,路由失败则消息丢失。

exchange的常见类型:

Fanout 广播

Direct 路由

Topic 话题

Fanout 会将收到的消息路由到每个跟其绑定的队列

1.在consumer服务中,利用代码声明队列交换机  并绑定,新建配置类

@Configuration
public class FanoutConfig {
    //声明交换机
    @Bean
    public FanoutExchange fanoutExchange(){
        return new FanoutExchange("itcast.fanout");
    }
    //声明队列
    @Bean
    public Queue fanoutQueue1(){
        return new Queue("fanout.queue1");
    }
    
    //绑定
    @Bean
    public Binding fanoutBinding1(Queue fanoutQueue1, FanoutExchange fanoutExchange){
        return BindingBuilder.bind(fanoutQueue1).to(fanoutExchange);
    }

    @Bean
    public Queue fanoutQueue2(){
        return new Queue("fanout.queue1");
    }

    //绑定
    @Bean
    public Binding fanoutBinding2(Queue fanoutQueue2, FanoutExchange fanoutExchange){
        return BindingBuilder.bind(fanoutQueue2).to(fanoutExchange);
    }
}

2.在consumer服务中,编写两个消费者方法,在listener中分别监听fanout.queue1 和fanout.queue2

@RabbitListener(queues = "fanout.queue1")
    public void listenFanoutQueue1(String msg){
        System.out.printf("接收到fanout.queue1:【"+msg+"】");

    }

    @RabbitListener(queues = "fanout.queue2")
    public void listenFanoutQueue2(String msg){
        System.out.printf("接收到fanout.queue2:【"+msg+"】");

    }

3.在publisher中编写测试方法,向itcast.fanout发送消息

    @Test
    public void testSendFanoutMessage(){
        String exchangeName = "itcast.fanout";
        String message = "hello, hey";
        rabbitTemplate.convertAndSend(exchangeName,"", message);
    }

 

标签:fanout,queue1,fanoutExchange,return,Queue,交换机,SpringAMQP,public,Fanout
来源: https://www.cnblogs.com/timewarlock/p/15533575.html