深圳网站建设服务平台,小程序开发入门教程,门户类网站模板,网站代运营公司有哪些说明#xff1a; 生产者P 往交换机X#xff08;typedirect#xff09;会发送两种消息#xff1a;一、routingKeyXA的消息#xff08;消息存活周期10s#xff09;#xff0c;被队列QA队列绑定入列#xff1b;一、routingKeyXB的消息#xff08;消息存活周期40s#xf… 说明 生产者P 往交换机Xtypedirect会发送两种消息一、routingKeyXA的消息消息存活周期10s被队列QA队列绑定入列一、routingKeyXB的消息消息存活周期40s被队列Q B队列绑定入列。QA、QB两个队列消息在失活变成死信消息以routingKeyYD发送到交换机Ytypedirect。队列QD用routingKey绑定交换机Y消息入列。消费者监听处理QD的消息。 这个设计模型达到了消息从生产者到消费者延迟10s、40s不等的延迟队列处理。 这里用SpringBoot mavendependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-amqp/artifactId/dependency在封装工具类中 其中【交换机】【队列】【绑定器】 可直接使用工具类这里对案例图所用到组件器声明注解出来。
框内的组件和关系 可以在SpringBoot配置类中做出如下的组件声明与关系绑定
package com.esint.configs;import org.springframework.amqp.core.*;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import java.util.HashMap;
import java.util.Map;/*** TTL延迟队列配置文件类**/
Configuration
public class TtlQueueConfig {////普通交换机的名称 Xpublic static final String X_EXCHANGE X;//死信交换机名称 Ypublic static final String Y_DEAD_LETTER_EXCHANGE Y;//普通队列QA QBpublic static final String QUEUE_A QA;public static final String QUEUE_B QB;//死信队列名称QDpublic static final String DEAD_LETTER_QUEUE QD;////声明X_EXCHANGEBean(xExchange)public DirectExchange xExchange(){return new DirectExchange(X_EXCHANGE);}//声明死信交换Y_DEAD_LETTER_EXCHANGEBean(yExchange)public DirectExchange yExchange(){return new DirectExchange(Y_DEAD_LETTER_EXCHANGE);}//声明队列 QABean(queueA)public Queue queueA(){MapString, Object arguments new HashMap(3);//设置死信交换机arguments.put(x-dead-letter-exchange,Y_DEAD_LETTER_EXCHANGE);//设置死信RoutingKey 死信后充当了消费者的发送路由arguments.put(x-dead-letter-routing-key,YD);//消息过期时间arguments.put(x-message-ttl,10000);return QueueBuilder.durable(QUEUE_A).withArguments(arguments).build();}//声明队列 QBBean(queueB)public Queue queueB(){MapString, Object arguments new HashMap(3);//设置死信交换机arguments.put(x-dead-letter-exchange,Y_DEAD_LETTER_EXCHANGE);//设置死信RoutingKey 死信后充当了消费者的发送路由arguments.put(x-dead-letter-routing-key,YD);//消息过期时间arguments.put(x-message-ttl,40000);return QueueBuilder.durable(QUEUE_B).withArguments(arguments).build();}//声明死信队列QDBean(queueD)public Queue queueD(){return QueueBuilder.durable(DEAD_LETTER_QUEUE).build();}//捆绑//绑定队列QA与交换机X_EXCHANGEBeanpublic Binding queueABingXExchange(Qualifier(queueA) Queue queueA,Qualifier(xExchange) DirectExchange xExchange){return BindingBuilder.bind(queueA).to(xExchange).with(XA);}//绑定队列QB与交换机X_EXCHANGEBeanpublic Binding queueBBingXExchange(Qualifier(queueB) Queue queueB,Qualifier(xExchange) DirectExchange xExchange){return BindingBuilder.bind(queueB).to(xExchange).with(XB);}//绑定队列QD与交换机Y_ExchangeBeanpublic Binding queueDBingYExchange(Qualifier(queueD) Queue queueD,Qualifier(yExchange)DirectExchange yExchange){return BindingBuilder.bind(queueD).to(yExchange).with(YD);}
}
生产者与交换机X这里方便测试 我们把生产者放在一个Controller逻辑里
package com.esint.controller;//发送延迟消息import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.Date;Slf4j
RestController
RequestMapping(/ttl)
public class SendMesController {Autowiredprivate RabbitTemplate rabbitTemplate;GetMapping(/senMsg/{message})public void sendMes(PathVariable String message){log.info(当前时间{},发送一条消息给两个TTL队列{},new Date().toString(),message);rabbitTemplate.convertAndSend(X,XA,消息来自ttl为10s的队列message);rabbitTemplate.convertAndSend(X,XB,消息来自ttl为40s的队列message);}
}
消费者与死信队列创建一个监听者示例
package com.esint.consumer;import com.rabbitmq.client.Channel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;import java.util.Date;/*** 队列TTL消费者*/Slf4j
Component
public class DeadLetterQueueConsumer {//接受消息RabbitListener(queues QD)public void receiveD(Message message, Channel channel) throws Exception{String msg new String(message.getBody());log.info(当前时间{},收到私信队列的消息{},new Date().toString(),msg);}
}
rabbitmq的配置文件
spring:rabbitmq:host: *.*.*.*port: 5672username: guestpassword: guest
接下来可以启动SpringBoot: 启动后配置方法类会把交换机/队列/绑定器初始化配置
队列
交换机 点开详细后也能考到他们之间的绑定关系 消息发布测试
生产者发送消息
浏览器
http://127.0.0.1:19092/ttl/senMsg/nice通过生产者发送nice
当前时间Tue Nov 21 14:50:05 CST 2023,发送一条消息给两个TTL队列nice消费者在10s后和40秒分别收到了消息
