rabbitmq(7)通配符模式

rabbitmq

1、模型

topic实际是direct模式的升级版,topic模式下消息可以通过routingKey匹配的方式对应到消费者。
匹配规则如下:#(井号)可以匹配零个或多个单词,*(星号)可以匹配一个单词。

这里写图片描述

2、代码

2.1、生产者

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private final static String EXCHANGE_NAME = "test_topic_exchange";

public static void main(String[] args) throws Exception {

	ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("192.168.1.7");
    factory.setUsername("root");
    factory.setPassword("123456");
    
	Connection connection = factory.newConnection();
	Channel channel = connection.createChannel();
	
	/* 
	 * 申明交换机, topic
	 */
	channel.exchangeDeclare(EXCHANGE_NAME, "topic");
	
	String message = "Hello world";
	
	/*
	 * routingKey不是任意的,必须是由点分隔的单词列表,例如"stock.usd.nyse","nyse.vmw","quick.orange.rabbit",且最多255个字节
	 * topic实际是direct模式的升级版,topic模式下消息可以通过routingKey匹配的方式对应到消费者
	 * 匹配规则如下:#(井号)可以匹配零个或多个单词,*(星号)可以匹配一个单词
	 * 例如:key1.key2可以匹配key1.*和key1.key2.#,但不能匹配#.key3
	 */
	String routingKey = "key1.key2";
	channel.basicPublish(EXCHANGE_NAME, routingKey, null, message.getBytes());
	System.out.println(" [x] Sent '" + message + "'");
	
	channel.close();
	connection.close();
}

2.2、消费者1

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private final static String EXCHANGE_NAME = "test_topic_exchange";

public static void main(String[] args) throws Exception {
	ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("192.168.1.7");
    factory.setUsername("root");
    factory.setPassword("123456");
    
	Connection connection = factory.newConnection();
	final Channel channel = connection.createChannel();

	channel.exchangeDeclare(EXCHANGE_NAME, "topic");
	String queueName = channel.queueDeclare().getQueue();
	
	channel.queueBind(queueName, EXCHANGE_NAME, "key1.*");
	
	System.out.println(" [1] Waiting for messages.");
	Consumer consumer = 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(" [1] Received '" + message + "'");

			channel.basicAck(envelope.getDeliveryTag(), false);
		}
	};
	boolean autoAck = false;
	channel.basicConsume(queueName, autoAck, consumer);
}

2.2、消费者2

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private final static String EXCHANGE_NAME = "test_topic_exchange";

public static void main(String[] args) throws Exception {
	ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("192.168.1.7");
    factory.setUsername("root");
    factory.setPassword("123456");
    
	Connection connection = factory.newConnection();
	final Channel channel = connection.createChannel();

	channel.exchangeDeclare(EXCHANGE_NAME, "topic");
	String queueName = channel.queueDeclare().getQueue();
	
	// 一个消费者可以绑定多个routingKey
	channel.queueBind(queueName, EXCHANGE_NAME, "#.key3");
	
	System.out.println(" [2] Waiting for messages.");
	Consumer consumer = 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(" [2] Received '" + message + "'");

			channel.basicAck(envelope.getDeliveryTag(), false);
		}
	};
	boolean autoAck = false;
	channel.basicConsume(queueName, autoAck, consumer);
}
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