win下，檢視rabbitmq的exchange：.\rabbitmqctl list_exchanges，可以看到有個amq.rabbitmq.log的topic類型的交換器，這個就是mq的日志輸出的exchange
1、建立連接配接、channel
ConnectionFactory factory = new ConnectionFactory();
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
2、聲明這個exchange，在vhost下的這個exchange的durable：true，auto_delete：false，internal：true,聲明時如果參數類型不比對，會報錯
channel.exchangeDeclare("amq.rabbitmq.log", "topic", true, false,true,null);
3、聲明三個日志等級的消息隊列，隊列名随便取
channel.queueDeclare("info_queue", false, false, false, null);
channel.queueDeclare("error_queue", false, false, false, null);
channel.queueDeclare("warning_queue", false, false, false, null);
4、将隊列綁定到交換器上(RabbitMQ把日志發送到這個交換器上，并且是以日志等級為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");
5、建立消費者，并設計消息處理邏輯(這裡僅做列印)
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);
}
};
6、指定消費隊列，監聽隊列并消費
channel.basicConsume("info_queue", true, consumer);
channel.basicConsume("error_queue", true, consumer);
channel.basicConsume("warning_queue", true, consumer);
7、控制台的顯示如下：
完成的代碼：
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;
public class MqLogListenService {
private static final Logger LOGGER = LoggerFactory.getLogger(MqLogListenService.class);
private static final String EXCHANGE_NAME = "amq.rabbitmq.log";
private static final String INFO_QUEUE = "info_queue";
private static final String WARNING_QUEUE = "warning_queue";
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();
//聲明交換器
channel.exchangeDeclare(EXCHANGE_NAME, "topic", true, false,true,null);
//聲明隊列
channel.queueDeclare(INFO_QUEUE, false, false, false, null);
channel.queueDeclare(ERROR_QUEUE, false, false, false, null);
channel.queueDeclare(WARNING_QUEUE, false, false, false, null);
//将隊列與交換器綁定，并指定route_key，rabbit預設的等級日志發送路由鍵是info、warning、error
channel.queueBind(INFO_QUEUE,EXCHANGE_NAME,"info");
channel.queueBind(ERROR_QUEUE,EXCHANGE_NAME,"error");
channel.queueBind(WARNING_QUEUE,EXCHANGE_NAME,"warning");
//建立消費者
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();
}
}