1、介绍

  • 我们一般就是在代码中编写while循环，调用consumer.nextDelivery方法获取下一条信息，然后进行消费处理。
  • 但是我们实际使用自定义的Consumer更加的方便，解耦性更加的强，也是实际工作中最常用的工作方式。

2、代码编写

自定义消费者

import com.rabbitmq.client.*;

import java.io.IOException;

public class MyConsumer extends DefaultConsumer {

    public MyConsumer(Channel channel) {
        super(channel);
    }

    @Override
    public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
        System.err.println("===========自定义消费者===========");
        System.err.println("consumerTag:"+consumerTag);
        System.err.println("envelope:"+envelope);
        System.err.println("properties:"+properties);
        System.err.println("body:"+new String(body));
        System.err.println();
    }
}

消费端

public class MyConsu {
    public static void main(String[] args) throws Exception {
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("49.235.24.110");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");

        Connection connection = connectionFactory.newConnection();
        Channel channel = connection.createChannel();

        // 声明
        String exchangeName = "test_consumer_exchange";
        String exchangeType = "topic";
        String queueName = "test_consumer_queue";
        String routingKey = "consumer.*";

        // 声明交换机
        channel.exchangeDeclare(exchangeName,exchangeType,true,false,false,null);
        // 声明队列
        channel.queueDeclare(queueName,true,false,false,null);
        // 建立绑定关系
        channel.queueBind(queueName,exchangeName,routingKey);

        channel.basicConsume(queueName,true,new MyConsumer(channel));

    }
}

生产端

public class MyProd {
    public static void main(String[] args) throws IOException, TimeoutException {
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("49.235.24.110");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");

        Connection connection =  connectionFactory.newConnection();

        Channel channel = connection.createChannel();

        String exchangeName = "test_consumer_exchange";
        String routingKey1 = "consumer.save";

        // 发送
        String msg = "RabbitMQ test consumer msg";
        for(int i=0;i<5;i++) {
            channel.basicPublish(exchangeName, routingKey1, null, (msg + "1").getBytes());
        }
        channel.close();
        connection.close();

    }
}