src/main/java/at/ac/tuwien/sbc/valesriegler/waiter/jms/messageListeners/WantToSitAtTable.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.MessageConsumer;
   8 import javax.jms.MessageListener;
   9 import javax.jms.MessageProducer;
  10 import javax.jms.ObjectMessage;
  11 import javax.jms.Session;
  12
  13 import org.apache.activemq.ActiveMQConnectionFactory;
  14 import org.slf4j.Logger;
  15 import org.slf4j.LoggerFactory;
  16
  17 import at.ac.tuwien.sbc.valesriegler.group.actions.TableRequest;
  18 import at.ac.tuwien.sbc.valesriegler.group.actions.TableResponse;
  19 import at.ac.tuwien.sbc.valesriegler.types.Table;
  20 import at.ac.tuwien.sbc.valesriegler.waiter.Waiter;
  21
  22 public class WantToSitAtTable implements MessageListener {
  23         private static final Logger log = LoggerFactory.getLogger(WantToSitAtTable.class);
  24         private final Waiter waiter;
  25
  26         public WantToSitAtTable(Waiter waiter) {
  27                 this.waiter = waiter;
  28         }
  29
  30         @Override
  31         public void onMessage(Message msg) {
  32                 try {
  33                         msg.acknowledge();
  34                         if (msg instanceof ObjectMessage) {
  35                                 ObjectMessage objMsg = (ObjectMessage) msg;
  36                                 Object obj = objMsg.getObject();
  37
  38                                 if (obj instanceof TableRequest) {
  39                                         TableRequest tablerequest = (TableRequest) obj;
  40                                         log.debug("Received: " + tablerequest);
  41
  42                                         // generate random delay
  43                                         Thread.sleep((long) (Math.random() * 10000));
  44
  45                                         ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
  46                                         Connection connection = connectionFactory.createConnection();
  47                                         connection.start();
  48                                         Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
  49
  50                                         MessageConsumer consumer = session.createConsumer(session.createQueue("TablesFree"));
  51                                         Message trm = consumer.receive();
  52                                         if (trm instanceof ObjectMessage) {
  53                                                 ObjectMessage tom = (ObjectMessage) trm;
  54                                                 Object tabledata = tom.getObject();
  55
  56                                                 if (tabledata instanceof Table) {
  57                                                         session.close();
  58                                                         Table table = (Table) tabledata;
  59                                                         System.out.println("Received: " + table);
  60
  61                                                         TableResponse tr = new TableResponse(tablerequest.getGroupdata(), table, waiter.getId());
  62                                                         session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
  63                                                         MessageProducer ret = session.createProducer(session.createQueue("GroupConnector"));
  64                                                         ret.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  65                                                         ret.send(session.createObjectMessage(tr));
  66
  67                                                 } else {
  68                                                         log.warn("Received unknown Object: " + tabledata);
  69                                                 }
  70                                         } else {
  71                                                 log.warn("Received unknown Message: " + trm);
  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                 } catch (JMSException e) {
  82                         log.error("EXCEPTION!", e);
  83                 } catch (InterruptedException e) {
  84                         log.error("EXCEPTION!", e);
  85                 }
  86         }
  87
  88 }