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();
}