1、exchange [topic]
1)direct 提前预知性的binding info、error、debug、warnning=》exchange
2)fanout 群发性的binding
3)headers and、or性质的binding x-match
4)topic 归类性的binding【带有正则效果】
queue1 *.com
queue2 *.cn
queue3 *.net
符号:
*:匹配一个或多个词
#:匹配一个词
2、代码实现
1)生产者
//基础配置 ConnectionFactory factory = new ConnectionFactory() { HostName = "10.123.44.12", UserName = "datamip", Password = "datamip" }; //第一步:创建connection using (var connection = factory.CreateConnection()) { //第二步:创建channel using (var channel = connection.CreateModel()) { //第三步:创建exchange //channel.ExchangeDeclare("myfanoutexchange", ExchangeType.Fanout, true, false, null); //第四步:发布消息 for (int i = 0; i < 100; i++) { var msg = Encoding.UTF8.GetBytes(string.Format("{0}:{1}", i, "你好")); var routingkey = i % 13 == 0 ? "呵呵.com" : "哈哈.cn"; channel.BasicPublish("mytopicexchange", routingkey, null, body: msg); Console.WriteLine(i); } } } Console.WriteLine("生产成功!"); Console.ReadKey();
生产者产生的routing会根据消费者队列绑定的routingkey对应关系去进入不同的队列
2)消费者
i)
//创建连接工厂 ConnectionFactory factory = new ConnectionFactory { UserName = "datamip",//用户名 Password = "datamip",//密码 HostName = "10.123.44.12"//rabbitmq ip }; //第一步:创建connection using (var connection = factory.CreateConnection()) { //第二步:创建channel using (var channel = connection.CreateModel()) { //第三步:生明交换机 channel.ExchangeDeclare("mytopicexchange", ExchangeType.Topic, true, false, null); //第四步:声明队列,绑定交换机 channel.QueueDeclare("mytopicqueue1", true, false, false, null); channel.QueueBind("mytopicqueue1", "mytopicexchange","*.com",null); //处理消息 EventingBasicConsumer consumer = new EventingBasicConsumer(channel); consumer.Received += (sender, e) => { var msg = Encoding.UTF8.GetString(e.Body.ToArray()); Console.WriteLine(msg); }; //消费 channel.BasicConsume("mytopicqueue1", true, consumer); Console.ReadKey(); } }
ii)
//创建连接工厂 ConnectionFactory factory = new ConnectionFactory { UserName = "datamip",//用户名 Password = "datamip",//密码 HostName = "10.123.44.12"//rabbitmq ip }; //第一步:创建connection using (var connection = factory.CreateConnection()) { //第二步:创建channel using (var channel = connection.CreateModel()) { //第三步:生明交换机 channel.ExchangeDeclare("mytopicexchange", ExchangeType.Topic, true, false, null); //第四步:声明队列,绑定交换机 channel.QueueDeclare("mytopicqueue2", true, false, false, null); channel.QueueBind("mytopicqueue2", "mytopicexchange","*.cn",null); //处理消息 EventingBasicConsumer consumer = new EventingBasicConsumer(channel); consumer.Received += (sender, e) => { var msg = Encoding.UTF8.GetString(e.Body.ToArray()); Console.WriteLine(msg); }; //消费 channel.BasicConsume("mytopicqueue2", true, consumer); Console.ReadKey(); } }
iii)效果图
3、图形解释
当前的图形解释有些问题,应该是会有不同的routingkey,routingkey会自动匹配,而不是视频中的直接判断,然后赋值*.com和*.cn,这样的话不需要topic交换机,也可以实现的(个人观点)。
因此代码进行了调整,示意图还是有点问题,自己理解下。