RabbitMQ:Topic Exchange

一.相关介绍

1.所有发送到Topic Exchange的消息被转发到所有关心RouteKey中指定Topic的Queue上。

2.Exchange将RouteKey和某Topic进行模糊匹配，此时队列需要绑定一个Topic。

可以使用通配符进行模糊匹配。

# 匹配一个或多个词

* 普配一个词

如 A.#可以匹配到A.B.C

　 A.*可以只能匹配到A.B 

 

 

二.消费者

    public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
        //创建一个连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.10.132");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        //创建连接
        Connection connection = connectionFactory.newConnection();
        //通过连接创建一个Channel
        Channel channel = connection.createChannel();
        //创建一个队列
        String exchangeName = "test_topic_exchange";
        String exchangeType = "topic";
        String queueName = "topic";
        String routingKey = "topic.*";
        //String routingKey2 = "topic.#";
        //声明一个交换机
        channel.exchangeDeclare(exchangeName,exchangeType,true,false,false,null);
        //声明一个队列
        channel.queueDeclare(queueName,false,false,false,null);
        //建立交换机、队列的绑定关系
        channel.queueBind(queueName,exchangeName,routingKey);
        //channel.queueBind(queueName,exchangeName,routingKey2);
        //创建一个消费者
        QueueingConsumer consumer = new QueueingConsumer(channel);
        //设置Channel
        channel.basicConsume(queueName,true,consumer);
        //获取消息
        while (true){
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
            String msg = new String(delivery.getBody());
            System.out.println("消费端："+msg);
        }

    }

三.生产者

    public static void main(String[] args) throws IOException, TimeoutException {
        //创建一个连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.10.132");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        //创建连接
        Connection connection = connectionFactory.newConnection();
        //通过连接创建一个Channel
        Channel channel = connection.createChannel();
        //通过Channel发送数据
        channel.basicPublish("test_topic_exchange","topic.T1",null,"test top exchange1".getBytes());
        channel.basicPublish("test_topic_exchange","topic.T1.T2",null,"test top exchange12".getBytes());
        //关闭连接
        channel.close();
        connection.close();
    }

关系拓扑：

　

运行结果：