消息中间件--RabbitMQ学习（六）

最新推荐文章于 2021-03-23 10:37:39 发布

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本文深入讲解了FanoutExchange的工作原理，介绍了如何在生产者和消费者中使用FanoutExchange进行消息广播。FanoutExchange不处理路由键，只需将队列绑定到交换机上，所有发送到交换机的消息都将被转发到所有绑定的队列。文章提供了生产端和消费端的代码示例。

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Fanout Exchange学习

Fanout Exchange介绍

不处理路由键,只需要简单的将队列绑定到交换机上
发送到交换机的消息都会被转发到与该交换机绑定的所有队列上
Fanout交换机转发消息是最快的

只要交换机跟队列有绑定，就能够发送消息过去。

消费端

public class CunsumerForFanout {

public static void main(String[] args) throws Exception{
    //1 创建一个connectionFactory
    ConnectionFactory connectionFactory = new ConnectionFactory();
    connectionFactory.setHost("192.168.0.159");
    connectionFactory.setPort(5672);
    connectionFactory.setVirtualHost("/");
    //2通过连接工场创建连接
    Connection connection = connectionFactory.newConnection();
    //3通过connection创建channel
    Channel channel = connection.createChannel();


    String exchangeName = "test_fanout_exchange";
    String exchangeType = "fanout";
    String queueName = "test_fanout_queue";
    String routingKey = "";
    channel.exchangeDeclare(exchangeName,exchangeType,true,false,false,null);
    channel.queueDeclare(queueName,false,false,false,null);
    channel.queueBind(queueName,exchangeName,routingKey);

    QueueingConsumer consumer = new QueueingConsumer(channel);
    channel.basicConsume(queueName,true,consumer);
    while (true){
        QueueingConsumer.Delivery delivery = consumer.nextDelivery();
        String msg = new String(delivery.getBody());
        System.out.println("收到消息：" + msg);
    }

}

}

生产端

public class ProducterForFanout {
    public static void main(String[] args) throws Exception{
        //1 创建一个connectionFactory
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.0.159");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        //2通过连接工场创建连接
        Connection connection = connectionFactory.newConnection();
        //3通过connection创建channel
        Channel channel = connection.createChannel();

        String exchangeName = "test_fanout_exchange";
        String routingKey1 = "sasa";
        String msg = "hello";
        for(int i=0;i<4;i++){
            channel.basicPublish(exchangeName,routingKey1,null,msg.getBytes());
        }
        channel.close();
        connection.close();

}