RabbitMQ系列学习笔记（十）--通配符模式-二、通配符模式实战

上图绑定关系如下：

• Q1–>绑定的是中间带orange的3个单词的字符串(.orange.)。
• Q2–>绑定的是最后一个单词是rabbit的3个单词的字符串(..rabbit)以及第一个单词是lazy的多个单词的字符串(lazy.#)。

1、消费者代码

消费者01代码如下：

/**
 * Description: 通配符模式消费者01
 */
public class ReceiveLogsTopic01 {
    
	private static final String EXCHANGE_NAME = "topic_logs"; 
    
    public static void main(String[] argv) throws Exception {
		Channel channel = RabbitUtils.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); 
        //绑定关系并指定routingkey
        channel.queueBind(queueName, EXCHANGE_NAME, "*.orange.*");

		System.out.println("等待接收消息.....");

    	//接收消息
        channel.basicConsume(queueName, true, new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println("接收队列:" + queueName + "绑定键:" + envelope.getRoutingKey() + ",消息:" + message);
            }
        });
    }
} 

消费者02代码如下：

/**
 * Description: 通配符模式消费者02
 */
public class ReceiveLogsTopic02 {
    
	private static final String EXCHANGE_NAME = "topic_logs"; 
    
    public static void main(String[] argv) throws Exception {
		Channel channel = RabbitUtils.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); 
        //绑定关系并指定routingkey
        channel.queueBind(queueName, EXCHANGE_NAME, "*.*.rabbit");
        channel.queueBind(queueName, EXCHANGE_NAME, "lazy.#");

		System.out.println("等待接收消息.....");

    	//接收消息
        channel.basicConsume(queueName, true, new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println("接收队列:" + queueName + "绑定键:" + envelope.getRoutingKey() + ",消息:" + message);
            }
        });
    }
} 

2、生产者代码

/**
 * Description: 通配符模式消费者02
 */
public class EmitLogTopic {
	private static final String EXCHANGE_NAME = "topic_logs"; 
    public static void main(String[] argv) throws Exception { 
        Channel channel = RabbitUtils.getChannel();

		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 routingKey = bindingKeyEntry.getKey();
			String message = bindingKeyEntry.getValue(); 
            channel.basicPublish(EXCHANGE_NAME,routingKey, null, message.getBytes("UTF-8"));
			System.out.println("生产者发出消息" + message);
		}
	}
}

3、查看运行结果

将两个消费者和一个生产者分别启动：



根据匹配规则，以及预先设置好的预期打印结果可以看到，Q1只接收了应该被Q1接收的三条消息，其他的没有接收，同理Q2也之接收了自己匹配规则之内的。并且可以发现当一条消息的routingkey既能够匹配Q1规则又能够匹配Q2规则时，Q1和Q2都能接收到该条消息。