/**
* Sets the notification in processed state.
*
* @param notification the notification
*/
protected void unlock(final ImportNotification notification) {
notification.setState(ImportNotificationState.PROCESSED);
importNotificationDao.update(notification);
if (LOG.isDebugEnabled()) {
LOG.debug(
"Import notification has been processed. Process ID: " + notification.getProcessId());
}
}
/**
* Tries to lock the notification by setting it into in_process state.
*
* @param notification the notification to lock
* @return true if the lock has been gained successfully
*/
protected boolean lock(final ImportNotification notification) {
if (ObjectUtils.equals(ImportNotificationState.IN_PROCESS, notification.getState())) {
return false;
}
// set in process on notification so that no other parties should take it over
notification.setState(ImportNotificationState.IN_PROCESS);
try {
// update the notification which makes sure that no other participants will take it for
// processing
// could throw OptimisticLockException wrapped in EpPersistenceException when some other party
// has updated the same object which means that it was already locked
importNotificationDao.update(notification);
} catch (EpPersistenceException exc) {
LOG.debug("Cannot gain lock over notification: " + notification, exc);
return false;
}
return true;
}