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.common.Util;
  17 import at.ac.tuwien.sbc.valesriegler.group.actions.OrderRequest;
  18 import at.ac.tuwien.sbc.valesriegler.group.actions.OrderResponse;
  19 import at.ac.tuwien.sbc.valesriegler.waiter.jms.JMSWaiter;
  20
  21 /**
  22  * Listener listening on the WantToOrder MQ, handling all incomming messages.
  23  *
  24  * @author jan
  25  *
  26  */
  27 public class WantToOrder implements MessageListener {
  28         private static final Logger log = LoggerFactory.getLogger(WantToOrder.class);
  29         private final JMSWaiter waiter;
  30
  31         public WantToOrder(JMSWaiter waiter) {
  32                 this.waiter = waiter;
  33         }
  34
  35         @Override
  36         public void onMessage(Message msg) {
  37                 try {
  38                         synchronized (waiter) {
  39                                 msg.acknowledge();
  40                                 if (msg instanceof ObjectMessage) {
  41                                         ObjectMessage objMsg = (ObjectMessage) msg;
  42                                         Object obj = objMsg.getObject();
  43
  44                                         if (obj instanceof OrderRequest) {
  45                                                 OrderRequest orderrequest = (OrderRequest) obj;
  46                                                 log.debug("Received: " + orderrequest);
  47
  48                                                 // generate random delay
  49                                                 Thread.sleep((long) (Math.random() * 10000));
  50
  51                                                 ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(Util.JMS_CONNECTSTRING);
  52                                                 Connection connection = connectionFactory.createConnection();
  53                                                 connection.start();
  54                                                 Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
  55                                                 OrderResponse or = new OrderResponse(orderrequest.getGroupdata(), waiter.getId());
  56
  57                                                 // Make cooks do their work
  58                                                 MessageProducer prodOP = session.createProducer(session.createQueue("OrdersToCook"));
  59                                                 prodOP.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  60                                                 // TODO: hack
  61                                                 orderrequest.getGroupdata().setOrderWaiter(waiter.getId());
  62                                                 prodOP.send(session.createObjectMessage(orderrequest));
  63
  64                                                 // inform Group + Pizzeria
  65                                                 MessageProducer informGroup = session.createProducer(session.createQueue("GroupConnector"));
  66                                                 informGroup.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  67                                                 informGroup.send(session.createObjectMessage(or));
  68
  69                                                 MessageProducer informPizzeria = session.createProducer(session.createQueue("PizzeriaConnector"));
  70                                                 informPizzeria.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  71                                                 informPizzeria.send(session.createObjectMessage(or));
  72
  73                                                 session.close();
  74                                                 connection.close();
  75                                         } else {
  76                                                 log.warn("Received unknown Object: " + obj);
  77                                         }
  78                                 } else {
  79                                         log.warn("Received unknown Message: " + msg);
  80                                 }
  81                         }
  82                 } catch (JMSException e) {
  83                         log.error("EXCEPTION!", e);
  84
  85                 } catch (InterruptedException e) {
  86                         log.error("EXCEPTION!", e);
  87                 }
  88         }
  89 }