package com.sf.publishandsubscribe;

import com.rabbitmq.client.*;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.concurrent.TimeoutException;

/**
 * 消息的消费
 */
public class SubscribeMessageLog2 {
    //声明需要创建的交换器名称
    private final static String EXCHANGE_NAME = "logs";
    public static void main(String[] args) throws IOException, TimeoutException {
        System.out.println("消费者客户端2");
        //创建连接RabbitMQ服务器的连接
        ConnectionFactory factory = new ConnectionFactory();
        //设置连接RabbitMQ的服务器地址
        factory.setHost("192.168.180.133");
        //设置连接RabbitMQ的服务器AMQP端口号
        factory.setPort(5672);
        //创建一个连接
        Connection connection = factory.newConnection();
        //创建频道
        Channel channel = connection.createChannel();
        /*
            创建一个名为logs，类型为fanout交换器
            RabbitMQ客户端提供了交换器类型的枚举BuiltinExchangeType
         */
        channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.FANOUT);
        //声明一个随机队列
        String queueName = channel.queueDeclare().getQueue();
        //将交换器和随机队列绑定到一起
        channel.queueBind(queueName,EXCHANGE_NAME,"");

        DeliverCallback deliverCallback = (consumerTag, delivery) -> {
            //获取订阅到的消息
            String message = new String(delivery.getBody());
            //将获取到的日志信息保存为本地文件 文件名为abc.log
            FileOutputStream fos = new FileOutputStream(new File("abc.log"), true);
            fos.write(message.getBytes());
            fos.flush();
            //关闭
            fos.close();
        };
        //获取订阅到的消息
        channel.basicConsume(queueName,true,deliverCallback,consumerTag -> { });
    }
}