学习RabbitMQ(第四章)

消息应答模式ACK

启动生产者

package com.producer;

import java.io.IOException;

import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.utils.MQConnectionUtils;

//简单队列生产者
public class Producer {
	//队列名称
	private static final String QUEUE_NAME ="zrf_644";
	public static void main(String[] args) throws IOException, TimeoutException {
		//1.创建一个新的连接
		Connection connection = MQConnectionUtils.newConnection();
		//2.创建通道
		Channel channel = connection.createChannel();
		//3.创建一个队列 参数1:队列名称 参数2:是否持久化   参数3:是否唯一  参数4:是否自动删除
		channel.queueDeclare(QUEUE_NAME, false, false, false, null);
		for(int i=0;i<10;i++) {
			//4.创建消息
			String msg ="zrf_644444msg:"+i;
			//5.生产者发送消息
			channel.basicPublish("", QUEUE_NAME, null, msg.getBytes());
			System.out.println("生产者发送消息成功:"+msg);
		}
		//6.关闭通道和连接
		channel.close();
		connection.close();
	}
}

启动消费者：并把应答模式设置为false，并使用channel.basicAck(envelope.getDeliveryTag(), false);返回应答状态

package com.consumer;

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

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.utils.MQConnectionUtils;

public class Consumer {
	//队列名称
		private static final String QUEUE_NAME ="zrf_644";
		public static void main(String[] args) throws IOException, TimeoutException {
			System.out.println("消费者01");
			//1.创建一个新的连接
			Connection connection = MQConnectionUtils.newConnection();
			//2.创建通道
			final Channel channel = connection.createChannel();
			//3.创建一个队列 参数1:队列名称 参数2:是否持久化   参数3:是否唯一  参数4:是否自动删除
			channel.queueDeclare(QUEUE_NAME, false, false, false, null);
			DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
				//监听获取消息
				@Override
				public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties,
						byte[] body) throws IOException {
					String msg = new String(body,"UTF-8");
					System.out.println("消费者获取生产者消息:"+msg);
					channel.basicAck(envelope.getDeliveryTag(), false);
				}
			};
			//设置应该模式  设置为true 表示默认自动应答  设置为false，则为手动应答
			channel.basicConsume(QUEUE_NAME, false,defaultConsumer);
		}

}