| 【rabbitMQ】 | 您所在的位置：网站首页 › wincc73消息队列 › 【rabbitMQ】 |
【rabbitMQ】
|
这个需求为控制智能家居工作，把控制智能家居的操作指令发到队列中，比如：扫地机、洗衣机到指定时间工作
一.什么是延迟队列？
延迟队列存储的对象是对应的延迟消息，所谓“延迟消息” 是指当消息被发送以后，并不想让消费者立刻拿到消息，而是等待特定时间后，消费者才能拿到这个消息进行消费。
二.如何设置延迟队列？ 1.配置2个业务队列（扫地机执行命令业务队列，洗衣机执行命令业务队列），绑定到业务交换机上 2.为业务队列配置死信交换机和路由key 3.为死信交换机配置2个延迟队列（扫地机执行命令延迟队列，洗衣机执行命令延迟队列）
三.延迟队列代码落地 using MengLin.Shopping.RabbitMQ.Common; using RabbitMQ.Client; using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace MengLin.Shopping.RabbitMQ.MsgProducer.QueueType.Delay { /// /// 延迟队列 /// public class DelayQueue { public static void SendMessage() { //业务交换机 var exchangeBusiness = "business-exchange"; var queueBusinessSaoDiJiCommand = "SaoDiJiCommand-business-queue";//扫地机执行命令业务队列 var routeKeyBusinessSaoDiJiCommand = "SaoDiJiCommand-business-routekey";//扫地机执行命令路由key var queueBusinessXiYiJiCommand = "XiYiJiCommand-business-queue";//洗衣机执行命令业务队列 var routeKeyBusinessXiYiJiCommand = "XiYiJiCommand-business-routekey";//洗衣机执行命令路由key //死信交换机 var exchangeDeadLetter = "deadLetter-exchange"; //扫地机执行命令的延时队列和路由key var delaySaoDiJiCommandQueue = "SaoDiJiCommand-delay-queue"; var routeKeyDelaySaoDiJi = "SaoDiJi-delay-routekey"; //洗衣机执行命令的延时队列和路由key var delayXiYiJiCommandQueue = "XiYiJiCommand-delay-queue"; var routeKeyDelayXiYiJi = "XiYiJi-delay-routekey"; using (var connection = RabbitMQHelper.GetConnection()) { using (var channel = connection.CreateModel()) { //创建死信交换机（死信交换机对交换机类型没有要求） channel.ExchangeDeclare(exchange: exchangeDeadLetter, type: ExchangeType.Direct, durable: true, autoDelete: false); //创建扫地机执行命令的延时队列 channel.QueueDeclare(queue: delaySaoDiJiCommandQueue, durable: true, exclusive: false, autoDelete: false); //创建洗衣机执行命令的延时队列 channel.QueueDeclare(queue: delayXiYiJiCommandQueue, durable: true, exclusive: false, autoDelete: false); //绑定死信交换机到扫地机执行命令的延时队列 channel.QueueBind(exchange: exchangeDeadLetter, queue: delaySaoDiJiCommandQueue, routingKey: routeKeyDelaySaoDiJi); //绑定死信交换机到洗衣机执行命令的延时队列 channel.QueueBind(exchange: exchangeDeadLetter, queue: delayXiYiJiCommandQueue, routingKey: routeKeyDelayXiYiJi); //创建业务交换机 channel.ExchangeDeclare(exchange: exchangeBusiness, type: ExchangeType.Direct, durable: true, autoDelete: false); //创建扫地机命令业务队列 Dictionary dic1 = new Dictionary(); dic1.Add("x-expires", 30 * 6 * 10000); //30分钟后扫地机命令业务队列自动干掉 dic1.Add("x-message-ttl", 10 * 6 * 10000);//设置消息在扫地机命令业务队列中的存活时间，即过期时间（消息如果10分钟内没有消费，就会放入扫地机执行命令的延时队列里） dic1.Add("x-dead-letter-exchange", exchangeDeadLetter);//过期消息转向路由 dic1.Add("x-dead-letter-routing-key", routeKeyDelaySaoDiJi);//设置死信交换机的路由key，死信交换机会根据路由key去找到对应的延迟队列 channel.QueueDeclare(queue: queueBusinessSaoDiJiCommand, durable: true, exclusive: false, autoDelete: false, arguments:dic1); //绑定业务交换机到扫地机命令业务队列 channel.QueueBind(queue: queueBusinessSaoDiJiCommand, exchange: exchangeBusiness, routingKey: routeKeyBusinessSaoDiJiCommand); //创建洗衣机命令业务队列 Dictionary dic2 = new Dictionary(); dic2.Add("x-expires", 30 * 6 * 10000); //30分钟后洗衣机命令业务队列自动干掉 dic2.Add("x-message-ttl", 20 * 6 * 10000);//设置消息在洗衣机命令业务队列中的存活时间，即过期时间（消息如果20分钟内没有消费，就会放入洗衣机执行命令的延时队列里） dic2.Add("x-dead-letter-exchange", exchangeDeadLetter);//过期消息转向路由 dic2.Add("x-dead-letter-routing-key", routeKeyDelayXiYiJi);//过期消息转向路由相匹配routingkey channel.QueueDeclare(queue: queueBusinessXiYiJiCommand, durable: true, exclusive: false, autoDelete: false, arguments: dic2); //绑定业务交换机到洗衣机命令业务队列 channel.QueueBind(queue: queueBusinessXiYiJiCommand, exchange: exchangeBusiness, routingKey: routeKeyBusinessXiYiJiCommand); Console.WriteLine("请输入发送的内容:"); var message = Console.ReadLine(); var body = Encoding.UTF8.GetBytes(message); //消息持久化，既然都要用到死信队列了，说明这条消息还是比较重要的 var properties = channel.CreateBasicProperties(); properties.Persistent = true; if(message.Contains("aa")) { //发布消息到扫地机命令业务队列 channel.BasicPublish(exchange: exchangeBusiness, routingKey: routeKeyBusinessSaoDiJiCommand, basicProperties: properties, body: body); } else { //发布消息洗衣机命令业务队列 channel.BasicPublish(exchange: exchangeBusiness, routingKey: routeKeyBusinessXiYiJiCommand, basicProperties: properties, body: body); } } } } } }
|
【本文地址】
公司简介
联系我们