@Override
public void beanChangePerformed(BeanEvent<U> evt) {
U bean = evt.getBean();
if (!bean.getStatus().isRequest()) return;
WeakReference<IConsumerProcess<U>> ref = processes.get(bean.getUniqueId());
try {
if (ref == null) { // Might be in submit queue still
updateQueue(bean);
} else {
IConsumerProcess<U> process = ref.get();
if (process != null) {
process.getBean().setStatus(bean.getStatus());
process.getBean().setMessage(bean.getMessage());
if (bean.getStatus() == Status.REQUEST_TERMINATE) {
processes.remove(bean.getUniqueId());
if (process.isPaused()) process.resume();
process.terminate();
} else if (bean.getStatus() == Status.REQUEST_PAUSE) {
process.pause();
} else if (bean.getStatus() == Status.REQUEST_RESUME) {
process.resume();
}
}
}
} catch (EventException ne) {
logger.error("Internal error, please contact your support representative.", ne);
}
}
private void executeBean(U bean) throws EventException, InterruptedException {
// We record the bean in the status queue
if (overrideMap != null && overrideMap.containsKey(bean.getUniqueId())) {
U o = overrideMap.remove(bean.getUniqueId());
bean.setStatus(o.getStatus());
}
logger.trace("Moving " + bean + " to " + mover.getSubmitQueueName());
mover.submit(bean);
// Run the process
if (runner == null) {
bean.setStatus(Status.FAILED);
bean.setMessage("No runner set for consumer " + getName() + ". Nothing run");
status.broadcast(bean);
throw new EventException("You must set the runner before executing beans from the queue!");
}
if (processes.containsKey(bean.getUniqueId())) {
throw new EventException(
"The bean with unique id '"
+ bean.getUniqueId()
+ "' has already been used. Cannot run the same uuid twice!");
}
// We peal off the most recent bean from the submission queue
if (bean.getStatus() == Status.REQUEST_TERMINATE) {
bean.setStatus(Status.TERMINATED);
bean.setMessage("Run aborted before started");
status.broadcast(bean);
return;
}
if (bean.getStatus().isFinal()) return; // This is not the bean you are looking for.
IConsumerProcess<U> process = runner.createProcess(bean, status);
processes.put(bean.getUniqueId(), new WeakReference<IConsumerProcess<U>>(process));
process.start(); // Depending on the process may run in a separate thread (default is not to)
}
protected void updateQueue(U bean) throws EventException {
boolean resumeAfter = !awaitPaused;
Session session = null;
try {
pause();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Queue queue = session.createQueue(getSubmitQueueName());
QueueBrowser qb = session.createBrowser(queue);
@SuppressWarnings("rawtypes")
Enumeration e = qb.getEnumeration();
while (e.hasMoreElements()) {
Message msg = (Message) e.nextElement();
TextMessage t = (TextMessage) msg;
String json = t.getText();
final StatusBean b = service.unmarshal(json, getBeanClass());
MessageConsumer consumer =
session.createConsumer(queue, "JMSMessageID = '" + msg.getJMSMessageID() + "'");
Message rem = consumer.receive(Constants.getReceiveFrequency());
consumer.close();
if (rem == null && b.getUniqueId().equals(bean.getUniqueId())) {
// Something went wrong, not sure why it does this, TODO investigate
if (overrideMap == null) overrideMap = new Hashtable<>(7);
overrideMap.put(b.getUniqueId(), bean);
continue;
}
MessageProducer producer = session.createProducer(queue);
if (b.getUniqueId().equals(bean.getUniqueId())) {
b.setStatus(bean.getStatus());
t = session.createTextMessage(service.marshal(b));
t.setJMSMessageID(rem.getJMSMessageID());
t.setJMSExpiration(rem.getJMSExpiration());
t.setJMSTimestamp(rem.getJMSTimestamp());
t.setJMSPriority(rem.getJMSPriority());
t.setJMSCorrelationID(rem.getJMSCorrelationID());
}
producer.send(t);
producer.close();
}
} catch (Exception ne) {
throw new EventException("Cannot reorder queue!", ne);
} finally {
// Only resume if it wasn't in a paused state before this update
if (resumeAfter) {
resume();
}
try {
if (session != null) session.close();
} catch (JMSException e) {
throw new EventException("Cannot close session!", e);
}
}
}
