1.Fanout Exchange介绍
Fanout Exchange 消息广播的模式，不管路由键或者是路由模式，会把消息发给绑定给它的全部队列，如果配置了routing_key会被忽略。
如上图所示，即当使用fanout交换器时，他会将消息广播到与该交换器绑定的所有队列上，这有利于你对单条消息做不同的反应。
例如存在以下场景：一个web服务要在用户完善信息时，获得积分奖励，这样你就可以创建两个对列，一个用来处理用户信息的请求，另一个对列获取这条消息是来完成积分奖励的任务。
2.代码示例
1）.Queue配置类
FanoutRabbitConfig.java类：
package com.example.rabbitmqfanout;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.FanoutExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class FanoutRabbitConfig {
//创建队列
@Bean
public Queue AMessage() {
return new Queue("fanout.A");
}
//创建队列
@Bean
public Queue BMessage() {
return new Queue("fanout.B");
}
//创建队列
@Bean
public Queue CMessage() {
return new Queue("fanout.C");
}
//创建Fanout交换器
@Bean
FanoutExchange fanoutExchange() {
return new FanoutExchange("fanoutExchange");
}
//将对列绑定到Fanout交换器
@Bean
Binding bindingExchangeA(Queue AMessage,FanoutExchange fanoutExchange) {
return BindingBuilder.bind(AMessage).to(fanoutExchange);
}
//将对列绑定到Fanout交换器
@Bean
Binding bindingExchangeB(Queue BMessage, FanoutExchange fanoutExchange) {
return BindingBuilder.bind(BMessage).to(fanoutExchange);
}
//将对列绑定到Fanout交换器
@Bean
Binding bindingExchangeC(Queue CMessage, FanoutExchange fanoutExchange) {
return BindingBuilder.bind(CMessage).to(fanoutExchange);
}
}
2）.消息生产者
FanoutSender.java类:
package com.example.rabbitmqfanout.rabbitmq;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Component
public class FanoutSender {
@Autowired
private AmqpTemplate rabbitTemplate;
public void send() {
String context = "hi, fanout msg ";
System.out.println("Sender : " + context);
this.rabbitTemplate.convertAndSend("fanoutExchange","", context);
}
}
3）.消息消费者
FanoutReceiverA.java类：
package com.example.rabbitmqfanout.rabbitmq;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
@Component
@RabbitListener(queues = "fanout.A")
public class FanoutReceiverA {
@RabbitHandler
public void process(String message) {
System.out.println("fanout Receiver A : " + message);
}
}
FanoutReceiverB.java类：
package com.example.rabbitmqfanout.rabbitmq;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
@Component
@RabbitListener(queues = "fanout.B")
public class FanoutReceiverB {
@RabbitHandler
public void process(String message) {
System.out.println("fanout Receiver B: " + message);
}
}
FanoutReceiverC.java类：
package com.example.rabbitmqfanout.rabbitmq;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
@Component
@RabbitListener(queues = "fanout.C")
public class FanoutReceiverC {
@RabbitHandler
public void process(String message) {
System.out.println("fanout Receiver C: " + message);
}
}
4）.测试
FanoutTest.java类：
package com.example.rabbitmqfanout.rabbitmq;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class FanoutTest {
@Autowired
private FanoutSender sender;
@Test
public void fanoutSender() throws Exception {
sender.send();
}
}
以上所述是小编给大家介绍的spring boot整合RabbitMQ（Fanout模式），希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！
