标签：client img 方式 图片 void [] received 声明 receive
路由模式下,生产者发送消息时需要指定一个路由键(routingKey),交换机只会把消息转发给包含该路由键的队列
这里,我们改变一下声明交换机的方式.
我们通过管理后台添加一个交换机.
添加后,生产者和消费者的代码中就不需要再声明交换机了.同样,也可以通过管理后台添加队列,那么代码中也不需要声明队列了.
public class Producer { private const string ExchangeName = "test_exchange_direct"; public static void Send() { IConnection connection = ConnectionHelper.GetConnection(); IModel channel = connection.CreateModel(); string msg = "hello world "; //把消息发送到交换机,交换机再转发到包含路由键"refuge"的队列. channel.BasicPublish(ExchangeName, "refuge", null, Encoding.Default.GetBytes(msg)); Console.WriteLine($"send {msg}"); channel.Close(); connection.Close(); } }
public class Consumer1 { private const string QueueName = "test_exchange1_queue"; private const string ExchangeName = "test_exchange_direct"; public static void Receive() { //获取连接 RabbitMQ.Client.IConnection connection = ConnectionHelper.GetConnection(); //创建通道 RabbitMQ.Client.IModel channel = connection.CreateModel(); //声明队列 channel.QueueDeclare(QueueName, false, false, false, null); //声明交换机 //channel.ExchangeDeclare(ExchangeName, "direct", false, false, null); //将队列绑定到交换机上,路由键为"wjire" channel.QueueBind(QueueName, ExchangeName, "wjire", null); //添加消费者 EventingBasicConsumer consumer = new EventingBasicConsumer(channel); //注册事件 consumer.Received += (s, e) => { byte[] bytes = e.Body; string str = Encoding.Default.GetString(bytes); Console.WriteLine("consumer1 : " + str); }; //监听队列 channel.BasicConsume(QueueName, true, "", false, false, null, consumer); } }
public class Consumer2 { private const string QueueName = "test_exchange2_queue"; private const string ExchangeName = "test_exchange_direct"; public static void Receive() { //获取连接 RabbitMQ.Client.IConnection connection = ConnectionHelper.GetConnection(); //创建通道 RabbitMQ.Client.IModel channel = connection.CreateModel(); //声明队列 channel.QueueDeclare(QueueName, false, false, false, null); //声明交换机 //channel.ExchangeDeclare(ExchangeName, "direct", false, false, null); //将队列绑定到交换机上,该队列匹配两个路由键,"refuge"和"wjire" channel.QueueBind(QueueName, ExchangeName, "refuge", null); channel.QueueBind(QueueName, ExchangeName, "wjire", null); //添加消费者 EventingBasicConsumer consumer = new EventingBasicConsumer(channel); //注册事件 consumer.Received += (s, e) => { byte[] bytes = e.Body; string str = Encoding.Default.GetString(bytes); Console.WriteLine(" consumer2 : " + str); }; //监听队列 channel.BasicConsume(QueueName, true, "", false, false, null, consumer); } }
运行结果:
可以看到,只有消费者2消费了消息.
RabbitMQ (六) : 订阅者模式之路由模式 ( direct )
标签：client img 方式 图片 void [] received 声明 receive
原文地址：https://www.cnblogs.com/refuge/p/10350926.html
