public DigitalLibraryServer() { try { Properties properties = new Properties(); properties.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory"); properties.put(Context.URL_PKG_PREFIXES, "org.jnp.interfaces"); properties.put(Context.PROVIDER_URL, "localhost"); InitialContext jndi = new InitialContext(properties); ConnectionFactory conFactory = (ConnectionFactory) jndi.lookup("XAConnectionFactory"); connection = conFactory.createConnection(); session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); try { counterTopic = (Topic) jndi.lookup("counterTopic"); } catch (NamingException NE1) { System.out.println("NamingException: " + NE1 + " : Continuing anyway..."); } if (null == counterTopic) { counterTopic = session.createTopic("counterTopic"); jndi.bind("counterTopic", counterTopic); } consumer = session.createConsumer(counterTopic); consumer.setMessageListener(this); System.out.println("Server started waiting for client requests"); connection.start(); } catch (NamingException NE) { System.out.println("Naming Exception: " + NE); } catch (JMSException JMSE) { System.out.println("JMS Exception: " + JMSE); JMSE.printStackTrace(); } }