Rabbitmq高级特性-消费端特性讲解_流控服务和ACK重回队列

 代码演示

    生成端

package com.bfxy.rabbitmq.api.limit;

import java.util.HashMap;
import java.util.Map;

import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class Sender {

    
    public static void main(String[] args) throws Exception {
        
        //1 创建ConnectionFactory
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.11.76");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        
        //2 创建Connection
        Connection connection = connectionFactory.newConnection();
        //3 创建Channel
        Channel channel = connection.createChannel();  
        //4 声明
        String queueName = "test001";  
        //参数: queue名字,是否持久化,独占的queue（仅供此连接）,不使用时是否自动删除, 其他参数
        channel.queueDeclare(queueName, true, false, false, null);
        
        Map<String, Object> headers = new HashMap<String, Object>();
        
        AMQP.BasicProperties props = new AMQP.BasicProperties.Builder()
        .deliveryMode(2)
        .contentEncoding("UTF-8")
        .headers(headers).build();
        
        
        for(int i = 0; i < 5;i++) {
            String msg = "Hello World RabbitMQ " + i;
            channel.basicPublish("", queueName , props , msg.getBytes());             
        }
    }
    
}

  消费端

  

package com.bfxy.rabbitmq.api.limit;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;
import com.rabbitmq.client.QueueingConsumer.Delivery;

public class Receiver {

    public static void main(String[] args) throws Exception {
        
        
        ConnectionFactory connectionFactory = new ConnectionFactory() ;  
        
        connectionFactory.setHost("192.168.11.76");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        
        connectionFactory.setAutomaticRecoveryEnabled(true);
        connectionFactory.setNetworkRecoveryInterval(3000);
        Connection connection = connectionFactory.newConnection();
        
        Channel channel = connection.createChannel();  
        
        String queueName = "test001";  
        //    durable 是否持久化消息
        channel.queueDeclare(queueName, true, false, false, null);  
        QueueingConsumer consumer = new QueueingConsumer(channel);
        
        channel.basicQos(0, 1, false);
        //    参数：队列名称、是否自动ACK、Consumer
        channel.basicConsume(queueName, false, consumer);  
        //    循环获取消息  
        while(true){  
            //    获取消息，如果没有消息，这一步将会一直阻塞  
            Delivery delivery = consumer.nextDelivery();  
            String msg = new String(delivery.getBody());    
            System.out.println("收到消息：" + msg);  
            channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
        } 
    }
}

 生成端

   

package com.bfxy.rabbitmq.api.requeue;

import java.util.HashMap;
import java.util.Map;

import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class Sender {

    
    public static void main(String[] args) throws Exception {
        
        //1 创建ConnectionFactory
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.11.71");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        
        //2 创建Connection
        Connection connection = connectionFactory.newConnection();
        //3 创建Channel
        Channel channel = connection.createChannel();  
        //4 声明
        String queueName = "test001";  
        //参数: queue名字,是否持久化,独占的queue（仅供此连接）,不使用时是否自动删除, 其他参数
        channel.queueDeclare(queueName, true, false, false, null);
        
        for(int i = 0; i < 5;i++) {
            String msg = "Hello World RabbitMQ " + i;
            Map<String, Object> headers = new HashMap<String, Object>();
            headers.put("flag", i);
            AMQP.BasicProperties props = new AMQP.BasicProperties.Builder()
            .deliveryMode(2)
            .contentEncoding("UTF-8")
            .headers(headers).build();
            channel.basicPublish("", queueName , props , msg.getBytes());             
        }
    }
    
}

消费端

package com.bfxy.rabbitmq.api.requeue;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;
import com.rabbitmq.client.QueueingConsumer.Delivery;

public class Receiver {

    public static void main(String[] args) throws Exception {
        
        
        ConnectionFactory connectionFactory = new ConnectionFactory() ;  
        
        connectionFactory.setHost("192.168.11.71");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        
        connectionFactory.setAutomaticRecoveryEnabled(true);
        connectionFactory.setNetworkRecoveryInterval(3000);
        Connection connection = connectionFactory.newConnection();
        
        Channel channel = connection.createChannel();  
        
        String queueName = "test001";  
        //durable 是否持久化消息
        channel.queueDeclare(queueName, true, false, false, null);  
        QueueingConsumer consumer = new QueueingConsumer(channel);
        
        //    参数：队列名称、是否自动ACK、Consumer
        channel.basicConsume(queueName, false, consumer);  
        //    循环获取消息  
        while(true){  
            //    获取消息，如果没有消息，这一步将会一直阻塞  
            Delivery delivery = consumer.nextDelivery();  
            String msg = new String(delivery.getBody());    
            System.out.println("收到消息：" + msg);  
            Thread.sleep(1000);
            
            if((Integer)delivery.getProperties().getHeaders().get("flag") == 0) {
                //throw new RuntimeException("异常");
                channel.basicNack(delivery.getEnvelope().getDeliveryTag(), false, false);
            } else {
                channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
            }
        } 
    }
}