监听RabbitMQ日志

win下，查看rabbitmq的exchange：.\rabbitmqctl list_exchanges，能够看到有个amq.rabbitmq.log的topic类型的交换器，这个就是mq的日志输出的exchange

一、建立链接、channel

ConnectionFactory factory = new ConnectionFactory();
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();

二、声明这个exchange，在vhost下的这个exchange的durable：true，auto_delete：false，internal：true,声明时若是参数类型不匹配，会报错

channel.exchangeDeclare("amq.rabbitmq.log", "topic", true, false,true,null);

三、声明三个日志等级的消息队列，队列名随便取

channel.queueDeclare("info_queue", false, false, false, null);

channel.queueDeclare("error_queue", false, false, false, null);

channel.queueDeclare("warning_queue", false, false, false, null);

四、将队列绑定到交换器上（RabbitMQ把日志发送到这个交换器上，而且是以日志等级为route_key:error、warning、info）

channel.queueBind("info_queue","amq.rabbitmq.log","info");

channel.queueBind("error_queue","amq.rabbitmq.log","error");

channel.queueBind("warning_queue","amq.rabbitmq.log","warning");

五、建立消费者，并设计消息处理逻辑（这里仅作打印）

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");

                LOGGER.info("-----------MQ LOG-------------\n"+ message+"\n\n");

                channel.basicAck(envelope.getDeliveryTag(),false);
            }

        };

六、指定消费队列，监听队列并消费

channel.basicConsume("info_queue", true, consumer);
channel.basicConsume("error_queue", true, consumer);
channel.basicConsume("warning_queue", true, consumer);

七、控制台的显示以下：

 

完成的代码：

package com.rabbitmq.ex.rabiitmqone.service;

import com.rabbitmq.client.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.concurrent.TimeoutException;

/**
 * @author jimsTon
 * @date 2018/5/24
 */
public class MqLogListenService {

    private static final Logger LOGGER = LoggerFactory.getLogger(MqLogListenService.class);

    /**
     * rabbitmq日志消息接收的交换器
     */
    private static final String EXCHANGE_NAME = "amq.rabbitmq.log";

    /**
     * 自定义info级别的队列
     */
    private static final String INFO_QUEUE = "info_queue";
    /**
     * 自定义warning级别的队列
     */
    private static final String WARNING_QUEUE = "warning_queue";
    /**
     * 自定义error级别的队列
     */
    private static final String ERROR_QUEUE = "error_queue";

    private void receiveMqLog() throws IOException, TimeoutException {

        //建立channel
        ConnectionFactory factory = new ConnectionFactory();
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        //声明交换器
        channel.exchangeDeclare(EXCHANGE_NAME, "topic", true, false,true,null);

        //声明队列
        channel.queueDeclare(INFO_QUEUE, false, false, false, null);
        channel.queueDeclare(ERROR_QUEUE, false, false, false, null);
        channel.queueDeclare(WARNING_QUEUE, false, false, false, null);

        //将队列与交换器绑定，并指定route_key，rabbit默认的等级日志发送路由键是info、warning、error
        channel.queueBind(INFO_QUEUE,EXCHANGE_NAME,"info");
        channel.queueBind(ERROR_QUEUE,EXCHANGE_NAME,"error");
        channel.queueBind(WARNING_QUEUE,EXCHANGE_NAME,"warning");

        //建立消费者
        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");

                LOGGER.info("-----------MQ LOG-------------\n{}",message);

                channel.basicAck(envelope.getDeliveryTag(),false);
            }

        };
        channel.basicConsume(INFO_QUEUE, true, consumer);
        channel.basicConsume(ERROR_QUEUE, true, consumer);
        channel.basicConsume(WARNING_QUEUE, true, consumer);
    }

    public static void main(String []args) throws IOException, TimeoutException {
        MqLogListenService mqLogListenService = new MqLogListenService();
        mqLogListenService.receiveMqLog();
    }
}