Question

我有一个Java程序，它向RabbitMQ发送消息。我所知道的只是交换名称。没有队列，绑定等。

我的问题是：如何知道程序是否成功发送，只知道交换名称？

感谢。

此致谢尔班

Answer 1

您可以使用RabbitMQ启用publisher confirmation。它就像发送事务一样，RabbitMQ会告诉你消息是否成功发送。

Answer 2

请看这里：https://www.rabbitmq.com/tutorials/tutorial-three-java.html

String queueName = channel.queueDeclare().getQueue();
    channel.queueBind(queueName, EXCHANGE_NAME, "");

    System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

    Consumer consumer = new DefaultConsumer(channel) {
      @Override
      public void handleDelivery(String consumerTag, Envelope envelope,
                                 AMQP.BasicProperties properties, byte[] body) throws IOException {
        String message = new String(body, "UTF-8");
        System.out.println(" [x] Received '" + message + "'");
      }
    };
    channel.basicConsume(queueName, true, consumer);

简而言之，你必须：

创建一个队列，在本例中为匿名队列
将队列绑定到您的交易所

在exchange或fanout或topic

direct

在此示例中为fanout

Answer 3

假设我们有RabbitMQ Exchange，我们需要创建一个队列来将消息推送到交换机并从队列中消耗它，如下所示


    private static final String EXCHANGE_NAME = "2022";
    private static final String QUEUE_NAME = "2022";
    private final static boolean durable = true;

// now we need to create a connection to rabbitmq server //

        ConnectionFactory factory = new ConnectionFactory();
        factory.setUsername("guest");
        factory.setPassword("guest");
        factory.setVirtualHost("/");
        factory.setHost("127.0.0.1");
        factory.setPort(5672);
        Connection conn = factory.newConnection();
       // create rabbitmq connection chaneel        
       Channel channel = conn.createChannel();
      //Declare Exchange // 
      channel.exchangeDeclare(EXCHANGE_NAME, "topic", true);
     // push message to rabbitmq exchange 

channel.basicPublish(EXCHANGE_NAME, "routingkey", null, yourmessage.getBytes());

以上作为制作人的工作现在我们需要创建队列消费者


    private static final String EXCHANGE_NAME = "2022";
    private static final String QUEUE_NAME = "2022";
    private final static boolean durable = true;

// now we need to create a connection to rabbitmq server //

        ConnectionFactory factory = new ConnectionFactory();
        factory.setUsername("guest");
        factory.setPassword("guest");
        factory.setVirtualHost("/");
        factory.setHost("127.0.0.1");
        factory.setPort(5672);
        Connection conn = factory.newConnection();
        // create rabbitmq connection chaneel       
        Channel channel = conn.createChannel();


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

          //Queue Declare //
          channel.queueDeclare(QUEUE_NAME, true, false, false, null);
         //Queue bind //
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "routingkey");
        // Queue Consume // 
        QueueingConsumer consumer = new QueueingConsumer(channel);

  while (true)
        {
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
            String message = new String(delivery.getBody());

            System.out.println(" [x] Received '" + message + "'");


        }

Rabbitmq - 如何在交易所收听消息

3 个答案: