public static Object lookupObject(Context context, String reference) throws NamingException { Object ref = context.lookup(reference); if (ref instanceof Reference) { String className = ((Reference) ref).getClassName(); try { ref = ClassHelper.loadClass(className, JmsTestUtils.class).newInstance(); } catch (Exception e) { throw new NamingException( "Failed to instanciate class: " + className + ". Exception was: " + e.toString()); } } return ref; }
/** * Wait for 'count' messages on controlQueue before continuing. Called by a publisher to make sure * that subscribers have started before it begins publishing messages. * * <p>If controlQueue doesn't exist, the method throws an exception. * * @param prefix prefix (publisher or subscriber) to be displayed * @param controlQueueName name of control queue * @param count number of messages to receive */ public static void receiveSynchronizeMessages(String prefix, String controlQueueName, int count) throws Exception { QueueConnectionFactory queueConnectionFactory = null; QueueConnection queueConnection = null; QueueSession queueSession = null; Queue controlQueue = null; QueueReceiver queueReceiver = null; try { queueConnectionFactory = SampleUtilities.getQueueConnectionFactory(); queueConnection = queueConnectionFactory.createQueueConnection(); queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE); controlQueue = getQueue(controlQueueName, queueSession); queueConnection.start(); } catch (Exception e) { System.out.println("Connection problem: " + e.toString()); if (queueConnection != null) { try { queueConnection.close(); } catch (JMSException ee) { } } throw e; } try { System.out.println( prefix + "Receiving synchronize messages from " + controlQueueName + "; count = " + count); queueReceiver = queueSession.createReceiver(controlQueue); while (count > 0) { queueReceiver.receive(); count--; System.out.println(prefix + "Received synchronize message; expect " + count + " more"); } } catch (JMSException e) { System.out.println("Exception occurred: " + e.toString()); throw e; } finally { if (queueConnection != null) { try { queueConnection.close(); } catch (JMSException e) { } } } }
/** * Send a message to controlQueue. Called by a subscriber to notify a publisher that it is ready * to receive messages. * * <p>If controlQueue doesn't exist, the method throws an exception. * * @param prefix prefix (publisher or subscriber) to be displayed * @param controlQueueName name of control queue */ public static void sendSynchronizeMessage(String prefix, String controlQueueName) throws Exception { QueueConnectionFactory queueConnectionFactory = null; QueueConnection queueConnection = null; QueueSession queueSession = null; Queue controlQueue = null; QueueSender queueSender = null; TextMessage message = null; try { queueConnectionFactory = SampleUtilities.getQueueConnectionFactory(); queueConnection = queueConnectionFactory.createQueueConnection(); queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE); controlQueue = getQueue(controlQueueName, queueSession); } catch (Exception e) { System.out.println("Connection problem: " + e.toString()); if (queueConnection != null) { try { queueConnection.close(); } catch (JMSException ee) { } } throw e; } try { queueSender = queueSession.createSender(controlQueue); message = queueSession.createTextMessage(); message.setText("synchronize"); System.out.println(prefix + "Sending synchronize message to " + controlQueueName); queueSender.send(message); } catch (JMSException e) { System.out.println("Exception occurred: " + e.toString()); throw e; } finally { if (queueConnection != null) { try { queueConnection.close(); } catch (JMSException e) { } } } }