Consuming Rabbit MQ messages using Eclipse on Tomcat - eclipse

Question

I am using Eclipse, Tomcat and Rabbit MQ.
I want to be able to consume messages of a queue as soon as they hit the queue. I have managed to do this using a Java class in Eclipse (see below), but have not been able to get this working when deploying the WAR file on the Tomcat server.
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 + "'");
}
}
}
Is there something I need to add like a web.xml file and if so, what should I add to this file?

Answer 1

Create a war application using eclipse:
you can see this video:
https://www.youtube.com/watch?v=fk22hQz9L_M
or googling then copy you code inside a servlet. You should use the init method.
an pseudo code:
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();
.....
}
}
See also DefaultConsumer
Hope it helps