Question

我想发布到绑定到交换的几个队列（扇出将不起作用，因为我想只发布到选择性队列而不是所有队列）

代码如下：

public int pushDataOverRabbitMQ(String[] deviceIDs, String msg) throws IOException {
        int retrunVal=0;
        String EXCHANGE_NAME="DUSHTEST";
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();


        channel.exchangeDeclare(EXCHANGE_NAME, "direct",true);

        for(int i=0;i<deviceIDs.length;i++){

            try{
                channel.queueDeclare(deviceIDs[i],true,false,false,null).getQueue();


                channel.queueBind(deviceIDs[i], EXCHANGE_NAME, deviceIDs[i]);
//routing key and queue have the same value

                channel.basicPublish(EXCHANGE_NAME, deviceIDs[i],  new AMQP.BasicProperties.Builder()
                .contentType("text/plain").deliveryMode(1)
                .priority(1).userId("guest")
                .build(),
                msg.getBytes());

                System.out.println(" [x] Sent '" + msg+ "'");

                retrunVal= Constants.PUB_STATUS_SUCCESS;
            }catch(Exception e){
                e.printStackTrace();
                retrunVal= Constants.PUB_STATUS_FAIL;
            }
        }
        channel.close();
        connection.close();
        return retrunVal;

    }

**deviceIDs**包含两个字符串Dush-Micromax and MyDesktop

由于低点我无法上传图片，但在服务器端创建了三个队列。上面的代码将创建的队列绑定到交换。

我之前创建了两个消费者，如下所示：

import java.io.IOException;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;


public class RabbitSubscriptionModel {

    /**
     * @param args
     */
    private final static String QUEUE_NAME = "MyDesktop";
    //  private final static String QUEUE_NAME = "Dush-Micromax";
    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        final Channel channel = connection.createChannel();
        try{
            channel.queueDeclare(QUEUE_NAME, true, false, false, null);
        }catch (Exception e) {
            e.printStackTrace();
        }


        channel.basicConsume(QUEUE_NAME, false,"My-Consumer-Trial1", new GenericConsumer(channel));
//      channel.basicConsume(QUEUE_NAME, false,"My-Consumer-Trial2", new GenericConsumer(channel));

    }

}

我有两个消费者，即 My-Consumer-Trial1和My-Consumer-Trial2

但是，我只收到第一个消费者的数据，即：My-Consumer-Trial1。在仔细分析了rabbitMQ管理控制台后，似乎不是发布到队列中消费者被挂钩到第二次发布上，而是发生在新的队列上。所以我们总共有三个队列，其中两个绑定到EXCHANGE，一个绑定到默认EXCHANGE。

Answer 1

您的代码中缺少很多内容。有关参考，请参阅本教程直接交换http://www.rabbitmq.com/tutorials/tutorial-four-java.html。

您没有连接到消费者的交换

您正在生产者而不是消费者中进行queueDeclare queueBind。

您没有读取消息的while循环

RabbitMQ通过交换发布到多个队列只发布到第一个队列

1 个答案: