标签：通过 message col turn 16px spring erb boot consumer
接着前面的Topic交换器，我们来研究一下Fanout交换器。
Fanout交换器：
扇形模式，不处理路由键，只是简单将队列绑定到交换器，发送到交换器的每条消息都回被转发到该交换器绑定的所有队列中，类型子网传播，通过Fanout交换器转发消息是最快的
现在进入实例工程来了解一下FanoutExchange扇形交换器的用法，还是基于上一篇的实例工程上去做编码
首先编写rabbitmq-provider生产者项目
创建FanoutRabbitConfig配置类
package com.rabbitmq.provider.config; 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 { /** * 创建三个队列 ：fanout.A fanout.B fanout.C * 将三个队列都绑定在交换机 fanoutExchange 上 * 因为是扇型交换机, 路由键无需配置,配置也不起作用 */ @Bean Queue queueA() { return new Queue("fanout.A"); } @Bean Queue queueB() { return new Queue("fanout.B"); } @Bean Queue queueC() { return new Queue("fanout.C"); } @Bean FanoutExchange fanoutExchange() { return new FanoutExchange("fanoutExchange"); } @Bean Binding bindingExchangeA() { return BindingBuilder.bind(queueA()).to(fanoutExchange()); } @Bean Binding bindingExchangeB() { return BindingBuilder.bind(queueB()).to(fanoutExchange()); } @Bean Binding bindingExchangeC() { return BindingBuilder.bind(queueC()).to(fanoutExchange()); } }
在Controller上多加一个接口
@GetMapping("/sendFanoutMessage")
public String sendFanoutMessage(){
String messageId = String.valueOf(UUID.randomUUID());
String messageData = "message: test fanoutMessage";
String createTime = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
Map<String,Object> map = new HashMap<>();
map.put("messageId",messageId);
map.put("messageData",messageData);
map.put("createTime",createTime);
rabbitTemplate.convertAndSend("fanoutExchange",null,map);
return "ok";
}
好了，生产者的代码就完成了，现在去rabbitmq-consumer消费者项目上完成后续代码
创建FanoutRabbitConfig配置类
package com.rabbitmq.consumer.config; 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 { /** * 创建三个队列 ：fanout.A fanout.B fanout.C * 将三个队列都绑定在交换机 fanoutExchange 上 * 因为是扇型交换机, 路由键无需配置,配置也不起作用 */ @Bean Queue queueA() { return new Queue("fanout.A"); } @Bean Queue queueB() { return new Queue("fanout.B"); } @Bean Queue queueC() { return new Queue("fanout.C"); } @Bean FanoutExchange fanoutExchange() { return new FanoutExchange("fanoutExchange"); } @Bean Binding bindingExchangeA() { return BindingBuilder.bind(queueA()).to(fanoutExchange()); } @Bean Binding bindingExchangeB() { return BindingBuilder.bind(queueB()).to(fanoutExchange()); } @Bean Binding bindingExchangeC() { return BindingBuilder.bind(queueC()).to(fanoutExchange()); } }
创建FanoutReceiverA、FanoutReceiverB、FanoutReceiverC
package com.rabbitmq.consumer.receiver; import org.springframework.amqp.rabbit.annotation.RabbitHandler; import org.springframework.amqp.rabbit.annotation.RabbitListener; import org.springframework.stereotype.Component; import java.util.Map; @Component @RabbitListener(queues = "fanout.A") public class FanoutReceiverA { @RabbitHandler public void process(Map message) { System.out.println("FanoutReceiverA 消费者收到消息： " + message); } }
package com.rabbitmq.consumer.receiver; import org.springframework.amqp.rabbit.annotation.RabbitHandler; import org.springframework.amqp.rabbit.annotation.RabbitListener; import org.springframework.stereotype.Component; import java.util.Map; @Component @RabbitListener(queues = "fanout.B") public class FanoutReceiverB { @RabbitHandler public void process(Map message) { System.out.println("FanoutReceiverB 消费者收到消息： " + message); } }
package com.rabbitmq.consumer.receiver; import org.springframework.amqp.rabbit.annotation.RabbitHandler; import org.springframework.amqp.rabbit.annotation.RabbitListener; import org.springframework.stereotype.Component; import java.util.Map; @Component @RabbitListener(queues = "fanout.C") public class FanoutReceiverC { @RabbitHandler public void process(Map message) { System.out.println("FanoutReceiverC 消费者收到消息： " + message); } }
启动这两个项目，使用postman工具调用sendFanoutMessage这个接口
可以看到只要发送到 fanoutExchange 这个扇型交换机的消息， 三个队列都绑定这个交换机，所以三个消息接收类都监听到了这条消息。
SpringBoot整合RabbitMQ之Fanout扇形交换器
标签：通过 message col turn 16px spring erb boot consumer
原文地址：https://www.cnblogs.com/liweixml/p/14662089.html
