【RabbitMQ】rabbitmq交换器topic类型

生产者：

package mq.topic;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

import java.io.IOException;
import java.util.UUID;
import java.util.concurrent.TimeoutException;

/**
 * @description topic转发器类型的demo
 * @author: gaobh
 * @date: 2018/4/25 16:11
 * @version: v1.0
 */
public class MqTopicProviderDemo {
    private static final String EXCHANGE_NAME = "topic_logs";

    public static void main(String[] args) throws IOException, TimeoutException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, "topic");
        String[] routing_keys = new String[]{"kernel.info", "cron.warning", "auth.info", "kernel.critical"};
        for (String routing_key : routing_keys) {
            String msg = UUID.randomUUID().toString();
            channel.basicPublish(EXCHANGE_NAME, routing_key, null, msg.getBytes());
            System.out.println(" [x] Sent routingKey = " + routing_key + " ,msg = " + msg + ".");
        }
        channel.close();
        connection.close();
    }
}

 

生产者声明了一个routingKey数组，有三个routingKey，分别循环生成消息。

 

生产者运行结果：

消费者1：

package mq.topic;

import com.rabbitmq.client.*;

import java.io.IOException;

/**
 * @description topic转发器类型的demo
 * @author: gaobh
 * @date: 2018/4/25 16:15
 * @version: v1.0
 */
@SuppressWarnings("ALL")
public class MqTopicConsumer1Demo {

    private static final String EXCHANGE_NAME = "topic_logs";
    private static final String QUEUE_NAME = "topic_queue1";
    public static void main(String[] args) throws Exception {
        // 创建连接和频道
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, "topic");
        channel.queueDeclare(QUEUE_NAME,true,false,false,null);
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "kernel.*");
        System.out.println(" [*] Waiting for messages about kernel. To exit press CTRL+C");
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
                                       byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                String routingKey = envelope.getRoutingKey();
                System.out.println(" [x] Received routingKey = " + routingKey
                        + ",msg = " + message + ".");
            }
        };

        channel.basicConsume(QUEUE_NAME, true, consumer);
    }
}

 

消费者有两个通过routingKey来匹配。

 

消费者1routingKey=kernel.*

消费者2routingKey=*.critical

消费者消费结果：

观察RabbitMQ后台：

我们代码里不是像之前一样设置的临时队列而是两个持久性队列，

看里面的配置：