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.common.Util;
  17 import at.ac.tuwien.sbc.valesriegler.group.actions.PayRequest;
  18 import at.ac.tuwien.sbc.valesriegler.group.actions.PayResponse;
  19 import at.ac.tuwien.sbc.valesriegler.waiter.jms.JMSWaiter;
  20
  21 /**
  22  * Listener listening on the WantToPay MQ, handling all incomming messages.
  23  *
  24  * @author jan
  25  *
  26  */
  27 public class WantToPay implements MessageListener {
  28         private static final Logger log = LoggerFactory.getLogger(WantToPay.class);
  29         private final JMSWaiter waiter;
  30
  31         public WantToPay(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 PayRequest) {
  45                                                 PayRequest payrequest = (PayRequest) obj;
  46                                                 log.debug("Received: " + payrequest);
  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                                                 PayResponse pr = new PayResponse(payrequest.getGroupdata(), waiter.getId());
  56
  57                                                 MessageProducer informGroup = session.createProducer(session.createQueue("GroupConnector"));
  58                                                 informGroup.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  59                                                 informGroup.send(session.createObjectMessage(pr));
  60
  61                                                 MessageProducer informPizzera = session.createProducer(session.createQueue("PizzeriaConnector"));
  62                                                 informPizzera.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  63                                                 informPizzera.send(session.createObjectMessage(pr));
  64
  65                                                 session.close();
  66                                                 connection.close();
  67                                         } else {
  68                                                 log.warn("Received unknown Object: " + obj);
  69                                         }
  70                                 } else {
  71                                         log.warn("Received unknown Message: " + msg);
  72                                 }
  73                         }
  74                 } catch (JMSException e) {
  75                         log.error("EXCEPTION!", e);
  76                 } catch (InterruptedException e) {
  77                         log.error("EXCEPTION!", e);
  78                 }
  79         }
  80 }