rabbitmq的七种模式

Hello word

客户端引入依赖

<!--rabbitmq 依赖客户端-->
 <dependency>
     <groupId>com.rabbitmq</groupId>
     <artifactId>amqp-client</artifactId>
     <version>5.8.0</version>
 </dependency>

生产者



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

public class Producer {
    private final static String QUEUE_NAME = "hello";

    public static void main(String[] args) throws Exception {
                //创建一个连接工厂
                ConnectionFactory factory = new ConnectionFactory();
                factory.setHost("43.139.59.28");
                factory.setUsername("guest");
                factory.setPassword("guest");
                //channel 实现了自动 close 接口 自动关闭 不需要显示关闭
                try(Connection connection = factory.newConnection(); Channel channel = connection.createChannel()) {
                /**
                * 生成一个队列
                * 1.队列名称
                * 2.队列里面的消息是否持久化 默认消息存储在内存中
                * 3.该队列是否只供一个消费者进行消费 是否进行共享 true 可以多个消费者消费
                * 4.是否自动删除 最后一个消费者端开连接以后 该队列是否自动删除 true 自动删除
                * 5.其他参数
                */
                channel.queueDeclare(QUEUE_NAME,false,false,false,null);
                String message="hello world!!!!";
                /**
                * 发送一个消息
                * 1.发送到那个交换机
                * 2.路由的 key 是哪个
                * 3.其他的参数信息
                * 4.发送消息的消息体
                */
                channel.basicPublish("",QUEUE_NAME,null,message.getBytes());
                System.out.println("消息发送完毕");
           }
    }
}

消费者



import com.rabbitmq.client.*;

public class Consumer {
       private final static String QUEUE_NAME = "hello";

      public static void main(String[] args) throws Exception {
            ConnectionFactory factory = new ConnectionFactory();
            factory.setHost("43.139.59.28");
            factory.setUsername("guest");
            factory.setPassword("guest");
            Connection connection = factory.newConnection();
            Channel channel = connection.createChannel();
            System.out.println("等待接收消息....");
            //推送的消息如何进行消费的接口回调
            DeliverCallback deliverCallback=(consumerTag, delivery)->{
            String message= new String(delivery.getBody());
            System.out.println(message);
            };
            //取消消费的一个回调接口 如在消费的时候队列被删除掉了
            CancelCallback cancelCallback=(consumerTag)->{
            System.out.println("消息消费被中断");
            };
             /**
              * 消费者消费消息
              * 1.消费哪个队列
              * 2.消费成功之后是否要自动应答 true 代表自动应答 false 手动应答
              * 3.消费者未成功消费的回调
              */
             channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);
      }
}

获取消息

工作队列

封装获取getChannel的工具类

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

public class RabbitMqUtils {
     //得到一个连接的 channel
     public static Channel getChannel() throws Exception{
         //创建一个连接工厂
         ConnectionFactory factory = new ConnectionFactory();
         factory.setHost("43.139.59.28");
         factory.setUsername("guest");
         factory.setPassword("guest");
         Connection connection = factory.newConnection();
         Channel channel = connection.createChannel();
         return channel;
     }
}

接收消息工作1线程

import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;

public class Worker01 {
     private static final String QUEUE_NAME="hello";

     public static void main(String[] args) throws Exception {
         Channel channel = RabbitMqUtils.getChannel();
         DeliverCallback deliverCallback=(consumerTag, delivery)->{
         String receivedMessage = new String(delivery.getBody());
         System.out.println("接收到消息:"+receivedMessage);
         };
         CancelCallback cancelCallback=(consumerTag)->{
         System.out.println(consumerTag+"消费者取消消费接口回调逻辑");
         };
         System.out.println("C1 消费者启动等待消费......");
         channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);
     }
}

接收消息工作线程2

import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;

public class Worker02 {
    private static final String QUEUE_NAME="hello";

    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMqUtils.getChannel();
        DeliverCallback deliverCallback=(consumerTag, delivery)->{
            String receivedMessage = new String(delivery.getBody());
            System.out.println("接收到消息:"+receivedMessage);
        };
        CancelCallback cancelCallback=(consumerTag)->{
            System.out.println(consumerTag+"消费者取消消费接口回调逻辑");
        };
        System.out.println("C2 消费者启动等待消费......");
        channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);
    }
}

发送10次消息

线程1和线程2平分消息

发布订阅

RabbitMQ 消息传递模型的核心思想是: 生产者生产的消息从不会直接发送到队列。实际上，通常生产者甚至都不知道这些消息传递传递到了哪些队列中。

总共有以下类型：直接(direct), 主题 (topic) , 标题 (headers) , 扇出 (fanout)

fanout

接收者1

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;

public class ReceiveLogs01 {
    private static final String EXCHANGE_NAME = "logs";

    public static void main(String[] argv) throws Exception {
        Channel channel = RabbitMqUtils.getChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
        /**
        * 生成一个临时的队列 队列的名称是随机的
        * 当消费者断开和该队列的连接时 队列自动删除
        */
        String queueName = channel.queueDeclare().getQueue();
        //把该临时队列绑定我们的 exchange 其中 routingkey(也称之为 binding key)为空字符串
        channel.queueBind(queueName, EXCHANGE_NAME, "");
        System.out.println("等待接收消息,把接收到的消息打印在屏幕.....");
        DeliverCallback deliverCallback = (consumerTag, delivery) -> {
           String message = new String(delivery.getBody(), "UTF-8");
           System.out.println("控制台打印接收到的消息"+message);
        };
     channel.basicConsume(queueName, true, deliverCallback, consumerTag -> { });
   }
}

接收者2

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import org.apache.commons.io.FileUtils;

import java.io.File;

public class ReceiveLogs02 {
    private static final String EXCHANGE_NAME = "logs";
    public static void main(String[] argv) throws Exception {
        Channel channel = RabbitMqUtils.getChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
        /**
        * 生成一个临时的队列 队列的名称是随机的
        * 当消费者断开和该队列的连接时 队列自动删除
        */
        String queueName = channel.queueDeclare().getQueue();
        //把该临时队列绑定我们的 exchange 其中 routingkey(也称之为 binding key)为空字符串
        channel.queueBind(queueName, EXCHANGE_NAME, "");
        System.out.println("等待接收消息,把接收到的消息写到文件.....");
        DeliverCallback deliverCallback = (consumerTag, delivery) -> {
           String message = new String(delivery.getBody(), "UTF-8");
//           File file = new File("C:\\work\\rabbitmq_info.txt");
//           FileUtils.writeStringToFile(file,message,"UTF-8");
           System.out.println("数据写入文件成功"+message);
        };
        channel.basicConsume(queueName, true, deliverCallback, consumerTag -> { });
    }
}

发送者

import com.rabbitmq.client.Channel;

import java.util.Scanner;

public class EmitLog {
     private static final String EXCHANGE_NAME = "logs";

     public static void main(String[] argv) throws Exception {
         try (Channel channel = RabbitMqUtils.getChannel()) {
            /**
            * 声明一个 exchange
            * 1.exchange 的名称
            * 2.exchange 的类型
            */
            channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入信息");
            while (sc.hasNext()) {
               String message = sc.nextLine();
               channel.basicPublish(EXCHANGE_NAME, "", null, message.getBytes("UTF-8"));
               System.out.println("生产者发出消息" + message);
            }
         }
     }
}

结果

Direct

接收者1 ，写入错误日志

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import org.apache.commons.io.FileUtils;

import java.io.File;

public class ReceiveLogsDirect01 {
    private static final String EXCHANGE_NAME = "direct_logs";
      public static void main(String[] argv) throws Exception {
         Channel channel = RabbitMqUtils.getChannel();
         channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.DIRECT);
         String queueName = "disk";
         channel.queueDeclare(queueName, false, false, false, null);
         channel.queueBind(queueName, EXCHANGE_NAME, "error");
         System.out.println("等待接收消息.....");
         DeliverCallback deliverCallback = (consumerTag, delivery) -> {
             String message = new String(delivery.getBody(), "UTF-8");
             message="接收绑定键:"+delivery.getEnvelope().getRoutingKey()+",消息:"+message;
//             File file = new File("C:\\work\\rabbitmq_info.txt");
//             FileUtils.writeStringToFile(file,message,"UTF-8");
             System.out.println("错误日志已经接收"+message);
         };
         channel.basicConsume(queueName, true, deliverCallback, consumerTag -> {
         });
      }
}

接收者2，打印控制台信息

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;

public class ReceiveLogsDirect02 {
        private static final String EXCHANGE_NAME = "direct_logs";
        public static void main(String[] argv) throws Exception {
           Channel channel = RabbitMqUtils.getChannel();
           channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.DIRECT);
           String queueName = "console";
           channel.queueDeclare(queueName, false, false, false, null);
           channel.queueBind(queueName, EXCHANGE_NAME, "info");
           channel.queueBind(queueName, EXCHANGE_NAME, "warning");
           System.out.println("等待接收消息.....");
           DeliverCallback deliverCallback = (consumerTag, delivery) -> {
              String message = new String(delivery.getBody(), "UTF-8");
              System.out.println(" 接收绑定键 :"+delivery.getEnvelope().getRoutingKey()+", 消息:"+message);
           };
           channel.basicConsume(queueName, true, deliverCallback, consumerTag -> {
           });
        }
}

发送者

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;

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

public class EmitLogDirect {
    private static final String EXCHANGE_NAME = "direct_logs";
     public static void main(String[] argv) throws Exception {
     try (Channel channel = RabbitMqUtils.getChannel()) {
         channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.DIRECT);
         //创建多个 bindingKey
         Map<String, String> bindingKeyMap = new HashMap<>();
         bindingKeyMap.put("info","普通 info 信息");
         bindingKeyMap.put("warning","警告 warning 信息");
         bindingKeyMap.put("error","错误 error 信息");
         //debug 没有消费这接收这个消息 所有就丢失了
         bindingKeyMap.put("debug","调试 debug 信息");
         for (Map.Entry<String, String> bindingKeyEntry: bindingKeyMap.entrySet()){
            String bindingKey = bindingKeyEntry.getKey();
            String message = bindingKeyEntry.getValue();
            channel.basicPublish(EXCHANGE_NAME,bindingKey, null, 
            message.getBytes("UTF-8"));
            System.out.println("生产者发出消息:" + message);
         }
     }
     }
}

接收到信息

Topics

主题1

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;

public class ReceiveLogsTopic01 {
       private static final String EXCHANGE_NAME = "topic_logs";
       public static void main(String[] argv) throws Exception {
          Channel channel = RabbitMqUtils.getChannel();
          channel.exchangeDeclare(EXCHANGE_NAME, "topic");
          //声明 Q1 队列与绑定关系
          String queueName="Q1";
          channel.queueDeclare(queueName, false, false, false, null);
          channel.queueBind(queueName, EXCHANGE_NAME, "*.orange.*");
          System.out.println("等待接收消息.....");
          DeliverCallback deliverCallback = (consumerTag, delivery) -> {
             String message = new String(delivery.getBody(), "UTF-8");
             System.out.println(" 接收队列 :"+queueName+" 绑 定 键:"+delivery.getEnvelope().getRoutingKey()+",消息:"+message);
          };
          channel.basicConsume(queueName, true, deliverCallback, consumerTag -> {
          });
       }
}

主题2

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;

public class ReceiveLogsTopic02 {
     private static final String EXCHANGE_NAME = "topic_logs";
      public static void main(String[] argv) throws Exception {
          Channel channel = RabbitMqUtils.getChannel();
          channel.exchangeDeclare(EXCHANGE_NAME, "topic");
          //声明 Q2 队列与绑定关系
          String queueName="Q2";
          channel.queueDeclare(queueName, false, false, false, null);
          channel.queueBind(queueName, EXCHANGE_NAME, "*.*.rabbit");
          channel.queueBind(queueName, EXCHANGE_NAME, "lazy.#");
          System.out.println("等待接收消息.....");
          DeliverCallback deliverCallback = (consumerTag, delivery) -> {
             String message = new String(delivery.getBody(), "UTF-8");
             System.out.println(" 接收队列 :"+queueName+" 绑 定 键:"+delivery.getEnvelope().getRoutingKey()+",消息:"+message);
          };
          channel.basicConsume(queueName, true, deliverCallback, consumerTag -> {
          });
      }
}

发送者

import com.rabbitmq.client.Channel;

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

public class EmitLogTopic {
    private static final String EXCHANGE_NAME = "topic_logs";
     public static void main(String[] argv) throws Exception {
         try (Channel channel = RabbitMqUtils.getChannel()) {
         channel.exchangeDeclare(EXCHANGE_NAME, "topic");
         /**
         * Q1-->绑定的是
         * 中间带 orange 带 3 个单词的字符串(*.orange.*)
         * Q2-->绑定的是
         * 最后一个单词是 rabbit 的 3 个单词(*.*.rabbit)
         * 第一个单词是 lazy 的多个单词(lazy.#)
         *
         */
         Map<String, String> bindingKeyMap = new HashMap<>();
         bindingKeyMap.put("quick.orange.rabbit","被队列 Q1Q2 接收到");
         bindingKeyMap.put("lazy.orange.elephant","被队列 Q1Q2 接收到");
         bindingKeyMap.put("quick.orange.fox","被队列 Q1 接收到");
         bindingKeyMap.put("lazy.brown.fox","被队列 Q2 接收到");
         bindingKeyMap.put("lazy.pink.rabbit","虽然满足两个绑定但只被队列 Q2 接收一次");
         bindingKeyMap.put("quick.brown.fox","不匹配任何绑定不会被任何队列接收到会被丢弃");
         bindingKeyMap.put("quick.orange.male.rabbit","是四个单词不匹配任何绑定会被丢弃");
         bindingKeyMap.put("lazy.orange.male.rabbit","是四个单词但匹配 Q2");
           for (Map.Entry<String, String> bindingKeyEntry: bindingKeyMap.entrySet()){
              String bindingKey = bindingKeyEntry.getKey();
              String message = bindingKeyEntry.getValue();
              channel.basicPublish(EXCHANGE_NAME,bindingKey, null, 
             message.getBytes("UTF-8"));
              System.out.println("生产者发出消息" + message);
           }
         }
     }
}

结果