src/main/java/at/ac/tuwien/sbc/valesriegler/waiter/jms/messageListeners/WantToPay.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.PayRequest;
  17 import at.ac.tuwien.sbc.valesriegler.group.actions.PayResponse;
  18 import at.ac.tuwien.sbc.valesriegler.waiter.Waiter;
  19
  20 /**
  21  * Listener listening on the WantToPay MQ, handling all incomming messages.
  22  *
  23  * @author jan
  24  *
  25  */
  26 public class WantToPay implements MessageListener {
  27         private static final Logger log = LoggerFactory.getLogger(WantToPay.class);
  28         private final Waiter waiter;
  29
  30         public WantToPay(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 PayRequest) {
  43                                         PayRequest payrequest = (PayRequest) obj;
  44                                         log.debug("Received: " + payrequest);
  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                                         MessageProducer informGroup = session.createProducer(session.createQueue("GroupConnector"));
  55                                         informGroup.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  56                                         PayResponse pr = new PayResponse(payrequest.getGroupdata(), waiter.getId());
  57                                         informGroup.send(session.createObjectMessage(pr));
  58
  59                                         session.close();
  60                                         connection.close();
  61                                 } else {
  62                                         log.warn("Received unknown Object: " + obj);
  63                                 }
  64                         } else {
  65                                 log.warn("Received unknown Message: " + msg);
  66                         }
  67                 } catch (JMSException e) {
  68                         log.error("EXCEPTION!", e);
  69                 } catch (InterruptedException e) {
  70                         log.error("EXCEPTION!", e);
  71                 }
  72         }
  73 }