SpringBoot與RabbitMQ

關於RabbitMQ我就不過多介紹了,我得博客前面也有過說明，本篇博客主要介紹一下SpringBoot與RabbitMQ的整合

SpringBoot整合RabbitMQ,RabbitAutoConfiguration 爲我們SpringBoot整合RabbitMQ 的自動配置類

1. 自動配置了連接工廠 ConnectionFactory
2. RabbitProperties封裝了 RabbitMQ
3. RabbitTemplate:給RabbitMQ發送和接受消息的
4. AmqpAdmin：RabbitMQ的系統管理功能組件

我們的項目結構如下

配置文件

我們首先編寫配置文件連接RabbitMQ

spring.rabbitmq.host=localhost
spring.rabbitmq.password=guest
spring.rabbitmq.username=guest
spring.rabbitmq.port=5672

這樣我們的項目基本配置就OK了

RabbitAutoConfiguration會爲我們自動在容器中裝配RabbitTemplate

我們使用RabbitTemplate做一個消息生產與消費的Demo

    @Test
    	public void send() {
    		Map<String,String> map = new HashMap<>();
    		map.put("firstName","yang");
    		map.put("lastName","zhao");
    		rabbitTemplate.convertAndSend("amq.direct","yz.zwl",map);
    	}

可以看到我們的消息已經存在隊列中了,接下來我們進行消費

   		@Test
    	public void receive() {
    		System.out.println(rabbitTemplate.receiveAndConvert("yz.zwl"));
    	}

可以看到我們已經成功消費了隊列中的消息

使用Json方式傳遞，並傳入對象Book

可以看到,我們的隊列中的消息並不是以JSON格式存儲的,所以我們需要進行配置自定義的消息轉化器

    @Configuration
    public class RabbitConfig {
    
        @Bean
        public MessageConverter messageConverter(){
            return new Jackson2JsonMessageConverter();
        }
    
    }

接下來我們測試將對象作爲消息進行生產消費

    	@Test
    	public void send() {
    		rabbitTemplate.convertAndSend("amq.direct","yz.zwl",new Student("yz","男"));
    	}

可以看到我們的消息已經以JSON的格式存在隊列中

消費消息也完全OK

開啓基於註解的方式

RabbitAutoConfiguration同樣會爲我們自動在容器中裝配AmqpAdmin(創建和刪除 Exchange 、Queue、Bind,)

我們之前的Demo是我們在RabbitMQManagement系統中自己創建的Exchange、Queue、Bind。接下來我們使用代碼的方式進行創建

首先我們創建三種Exchange以及Queue

    		amqpAdmin.declareExchange(new DirectExchange("yzExchange.direct"));
    		amqpAdmin.declareExchange(new FanoutExchange("yzExchange.fanout"));
    		amqpAdmin.declareExchange(new TopicExchange("yzExchange.topic"));
    
    		amqpAdmin.declareQueue(new Queue("yz.zwl",true));
    		amqpAdmin.declareQueue(new Queue("zwl.yz",true));
    		amqpAdmin.declareQueue(new Queue("yz.news",true));
    		amqpAdmin.declareQueue(new Queue("yz.china",true));
    		amqpAdmin.declareQueue(new Queue("zwl.news",true));

我們可以使用RabbitListener註解消費消息,參數爲對應的隊列 進行監聽相關隊列

 @Service
    public class RabbitService {
    
        @RabbitListener(queues = "yz.zwl")
        public void receiveDirect(Student student){
            System.out.println("yz.zwl消費消息");
            System.out.println(student);
        }
    
        @RabbitListener(queues = "zwl.yz")
        public void receiveDirect1(Student student){
            System.out.println("zwl.yz消費消息");
            System.out.println(student);
        }
    
        @RabbitListener(queues = "yz.news")
        public void receiveDirect2(Student student){
            System.out.println("yz.news消費消息");
            System.out.println(student);
        }
    
    }

Direct Exchange

使用AmqpAdmin創建Bind

amqpAdmin.declareBinding(new Binding("yz.zwl",Binding.DestinationType.QUEUE,"yzExchange.direct","yz.zwl",null));
amqpAdmin.declareBinding(new Binding("zwl.yz",Binding.DestinationType.QUEUE,"yzExchange.direct","zwl.yz",null));
amqpAdmin.declareBinding(new Binding("yz.news",Binding.DestinationType.QUEUE,"yzExchange.direct","yz.news",null));

我們將Direct模式的**yzExchange.direct **綁定到yz.zwl、zwl.yz、yz.news三個隊列，併爲他們三個聲明同名字的routing key

生產消息

   rabbitTemplate.convertAndSend("yzExchange.direct","yz.zwl",new Student("yangzhao111","男"));
   rabbitTemplate.convertAndSend("zwl.yz",new Student("yangzhao","男"));

可以看到只有對應的隊列消費了消息,證實了Direct 點對點的模式

Fanout Exchange

使用AmqpAdmin創建Bind

   //fanout
   amqpAdmin.declareBinding(new Binding("yz.zwl",Binding.DestinationType.QUEUE,"yzExchange.fanout","yz.zwl",null));
   amqpAdmin.declareBinding(new Binding("zwl.yz",Binding.DestinationType.QUEUE,"yzExchange.fanout","zwl.yz",null));
   amqpAdmin.declareBinding(new Binding("yz.news",Binding.DestinationType.QUEUE,"yzExchange.fanout","yz.news",null));

我們將Fanout模式的yzExchange.fanout綁定到yz.zwl、zwl.yz、yz.news三個隊列，併爲他們三個聲明同名字的routing key

生產消息

 rabbitTemplate.convertAndSend("yzExchange.fanout","yz.zwl",new Student("yangzhao","男"));

可以看到三個隊列都消費了消息，證實了Fanout的廣播效果,且與routing key無關

Topic Exchange

使用AmqpAdmin創建Bind

	amqpAdmin.declareBinding(new Binding("zwl.yz",Binding.DestinationType.QUEUE,"yzExchange.topic","zwl.*",null));
    amqpAdmin.declareBinding(new Binding("yz.zwl",Binding.DestinationType.QUEUE,"yzExchange.topic","*.zwl",null));
    amqpAdmin.declareBinding(new Binding("yz.news",Binding.DestinationType.QUEUE,"yzExchange.topic","#.news",null));

我們將Topic模式的yzExchange.topic綁定到yz.zwl、zwl.yz、yz.news三個隊列，併爲他們三個聲明對應的routing key *.zwl、zwl.*、#.news

生產消息

   //topic
   rabbitTemplate.convertAndSend("yzExchange.topic","yz.zwl",new Student("yangzhao","男"));
   rabbitTemplate.convertAndSend("yzExchange.topic","zwl.news",new Student("yangzhao","男"));

因爲我們消息的routing key 與三個Binding的都匹配,所以三個隊列都消費了消息

Amqp刪除Exchange、Queue

amqpAdmin.deleteExchange("yzExchange.direct");
amqpAdmin.deleteExchange("yzExchange.fanout");
amqpAdmin.deleteExchange("yzExchange.topic");

amqpAdmin.deleteQueue("yz.zwl");
amqpAdmin.deleteQueue("zwl.yz");
amqpAdmin.deleteQueue("yz.news");
amqpAdmin.deleteQueue("yz.china");
amqpAdmin.deleteQueue("zwl.news");