Question

我正在使用Eclipse，Tomcat和Rabbit MQ。

我希望能够在队列中消息后立即使用队列消息。我已经设法在Eclipse中使用Java类（见下文），但在Tomcat服务器上部署WAR文件时无法实现这一点。

package org.com.hello;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.QueueingConsumer;
public class HelloRecv {

  public static void main(String[] argv)
      throws java.io.IOException,
             java.lang.InterruptedException {
    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("172.24.3.53");
    factory.setPort(6672);
    factory.setUsername("user");
    factory.setPassword("password");
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();

    channel.queueDeclare("q1", true, false, false, null);
    System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

    QueueingConsumer consumer = new QueueingConsumer(channel);
    channel.basicConsume("q1", true, consumer);

    while (true) {
      QueueingConsumer.Delivery delivery = consumer.nextDelivery();
      String message = new String(delivery.getBody());
      System.out.println(" [x] Received '" + message + "'");
    }
     }
}

我是否需要像web.xml文件一样添加内容，如果有，我应该将哪些内容添加到此文件中？

Answer 1

使用eclipse创建一个war应用程序：

你可以看到这个视频： https://www.youtube.com/watch?v=fk22hQz9L_M

或谷歌搜索然后将您的代码复制到servlet中。您应该使用init方法。

伪代码：

    public class YourServlet extends HttpServlet {

      int count;

      public void init(ServletConfig config) throws ServletException {
        super.init(config);
         ConnectionFactory factory = new ConnectionFactory();
         factory.setHost("172.24.3.53");
        factory.setPort(6672);
        factory.setUsername("user");
        factory.setPassword("password");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        channel.queueDeclare("q1", true, false, false, null);

    /// you shoud put the consumer inside a thread.
    channel.basicConsume("q1", true, new DefaultConsumer(){
    /// here you should use Default consumer and not QueueingConsumer because is blocking 
    });
    }
  }  
      public void doGet(HttpServletRequest req, HttpServletResponse res) 
                               throws ServletException, IOException {
        res.setContentType("text/plain");
        PrintWriter out = res.getWriter();
        .....


      }
    }

另见DefaultConsumer

希望有所帮助

在Tomcat上使用Eclipse消耗Rabbit MQ消息

1 个答案: