src/main/java/at/ac/tuwien/sbc/valesriegler/waiter/jms/messageListeners/WantToOrder.java

   1 package at.ac.tuwien.sbc.valesriegler.waiter.jms.messageListeners;
   2
   3 import javax.jms.Connection;
   4 import javax.jms.DeliveryMode;
   5 import javax.jms.JMSException;
   6 import javax.jms.Message;
   7 import javax.jms.MessageListener;
   8 import javax.jms.MessageProducer;
   9 import javax.jms.ObjectMessage;
  10 import javax.jms.Session;
  11
  12 import org.apache.activemq.ActiveMQConnectionFactory;
  13 import org.slf4j.Logger;
  14 import org.slf4j.LoggerFactory;
  15
  16 import at.ac.tuwien.sbc.valesriegler.group.actions.OrderRequest;
  17 import at.ac.tuwien.sbc.valesriegler.group.actions.OrderResponse;
  18 import at.ac.tuwien.sbc.valesriegler.waiter.Waiter;
  19
  20 /**
  21  * Listener listening on the WantToOrder MQ, handling all incomming messages.
  22  *
  23  * @author jan
  24  *
  25  */
  26 public class WantToOrder implements MessageListener {
  27         private static final Logger log = LoggerFactory.getLogger(WantToOrder.class);
  28         private final Waiter waiter;
  29
  30         public WantToOrder(Waiter waiter) {
  31                 this.waiter = waiter;
  32         }
  33
  34         @Override
  35         public void onMessage(Message msg) {
  36                 try {
  37                         msg.acknowledge();
  38                         if (msg instanceof ObjectMessage) {
  39                                 ObjectMessage objMsg = (ObjectMessage) msg;
  40                                 Object obj = objMsg.getObject();
  41
  42                                 if (obj instanceof OrderRequest) {
  43                                         OrderRequest orderrequest = (OrderRequest) obj;
  44                                         log.debug("Received: " + orderrequest);
  45
  46                                         // generate random delay
  47                                         Thread.sleep((long) (Math.random() * 10000));
  48
  49                                         ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
  50                                         Connection connection = connectionFactory.createConnection();
  51                                         connection.start();
  52                                         Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
  53
  54                                         // Make cooks do their work
  55                                         MessageProducer prodOP = session.createProducer(session.createQueue("OrdersToCook"));
  56                                         prodOP.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  57                                         prodOP.send(session.createObjectMessage(orderrequest));
  58
  59                                         // inform Group + Pizzeria
  60                                         MessageProducer informGroup = session.createProducer(session.createQueue("GroupConnector"));
  61                                         informGroup.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  62                                         OrderResponse or = new OrderResponse(orderrequest.getGroupdata(), waiter.getId());
  63                                         informGroup.send(session.createObjectMessage(or));
  64
  65                                         MessageProducer informPizzeria = session.createProducer(session.createQueue("PizzeriaConnector"));
  66                                         informPizzeria.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  67                                         informPizzeria.send(session.createObjectMessage(or));
  68
  69                                         session.close();
  70                                         connection.close();
  71                                 } else {
  72                                         log.warn("Received unknown Object: " + obj);
  73                                 }
  74                         } else {
  75                                 log.warn("Received unknown Message: " + msg);
  76                         }
  77                 } catch (JMSException e) {
  78                         log.error("EXCEPTION!", e);
  79                 } catch (InterruptedException e) {
  80                         log.error("EXCEPTION!", e);
  81                 }
  82         }
  83 }