RabbitMQ学习（四）：路由

 

1．使用直接交换机（Direct），消费在发送消息时绑定一个routingKey值，消费者在绑定通道的时候指定交换机和routingKey值，就可以实现对消息的路由。

消费者代码：

public class Consumer {
    public static void main(String[] args) throws IOException, InterruptedException, TimeoutException {
        //创建连接和通道
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        final Connection connection = factory.newConnection();
        ExecutorService service = Executors.newFixedThreadPool(10);
        for (int i = 0; i < 4; i++) {
            final int cur = i;
            service.submit(new Runnable() {
                Channel channel = connection.createChannel();
                String queryname = channel.queueDeclare().getQueue();

                public void run() {
                    //创建队列消费者
                    QueueingConsumer consumer = new QueueingConsumer(channel);
                    try {
                        //第四个线程绑定多个routkey
                        if (cur == 3) {
                            channel.queueBind(queryname, "direct", "0");
                            channel.queueBind(queryname, "direct", "1");
                            channel.queueBind(queryname, "direct", "2");
                        } else {
                            //第三个参数是routingkey
                            channel.queueBind(queryname, "direct", cur + "");
                        }
                        channel.basicConsume(queryname, consumer);
                        while (true) {
                            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
                            String message = new String(delivery.getBody());
                            System.out.println("线程 " + cur + " 获取到消息 " + message);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
        }
        service.shutdown();
    }
}

生产者代码：

public class Productor {

    public static void main(String[] args) throws IOException, TimeoutException {

        //配置rabbitmq服务器地址

        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost("localhost");

        factory.setPort(5672);

        factory.setUsername("starktan");

        factory.setPassword("starktan");

        factory.setVirtualHost("/");

        //建立连接和通道

        Connection connection = factory.newConnection();

        Channel channel = connection.createChannel();

        //声明一个直接交换机

        channel.exchangeDeclare("direct", BuiltinExchangeType.DIRECT);

        System.out.println("发送信息！");

        String message = "WorkQueue Message number " ;

        //第二个参数是routingkey

        channel.basicPublish("direct", "0", true, null, (message+"one").getBytes());

        channel.basicPublish("direct", "1", true, null, (message+"two").getBytes());

        channel.basicPublish("direct", "2", true, null,(message+"three").getBytes());

        channel.close();

        connection.close();

    }

}