RabbitMQ整合Spring Booot【消费者应答模式】

以你之姓@ 2024-04-17 22:05 12阅读 0赞

生产者代码不变，消费者：

package com.toov5.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.toov5.utils.MQConnectionUtils;
    
    public class Consumer {
      
         //队列名称
            private static final String QUEUE_NAME = "test_queue";
            
            public static void main(String[] args) throws IOException, TimeoutException {
                System.out.println("消费者启动..........");
                //创建新的连接
            Connection connection = MQConnectionUtils.newConnection();
               //创建Channel
                Channel channel = connection.createChannel();
                // 消费者关联队列
                channel.queueDeclare(QUEUE_NAME, false, false, false, null);
                
                  DefaultConsumer defaultConsumerr = 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);
                        }
                  };
                //牵手模式设置  默认自动应答模式  true:自动应答模式  
                  channel.basicConsume(QUEUE_NAME, false, defaultConsumerr);//    fanse手动应答          
                  
    //            //关闭通道和连接
    //             channel.close();
    //             connection.close();
            }
    }

手动应答。此时 消息队列的消息 一直没有被清除掉

生产者做如下修改就OK了：

package com.toov5.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.toov5.utils.MQConnectionUtils;
    
    public class Consumer {
      
         //队列名称
            private static final String QUEUE_NAME = "test_queue";
            
            public static void main(String[] args) throws IOException, TimeoutException {
                System.out.println("消费者启动..........");
                //创建新的连接
            Connection connection = MQConnectionUtils.newConnection();
               //创建Channel
                final Channel channel = connection.createChannel();
                // 消费者关联队列
                channel.queueDeclare(QUEUE_NAME, false, false, false, null);
                
                  DefaultConsumer defaultConsumerr = 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);  //手动应答 告诉消息队列服务器 消费成功
                        }
                  };
                //牵手模式设置  默认自动应答模式  true:自动应答模式  
                  channel.basicConsume(QUEUE_NAME, false, defaultConsumerr);//    fanse手动应答          
                  
    //            //关闭通道和连接
    //             channel.close();
    //             connection.close();
            }
    }

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[1179709-20181110205205892-611008827.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/60c63ea71eea40a698e03bfa4f4ca209.png