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); } }