@Transactional
protected void clearPin(PinTask task) {
if (task.getPool() != null) {
/* If the pin record expired or the pin was explicitly
* unpinned, then the unpin processor may already have
* submitted a request to the pool to clear the sticky
* flag. Although out of order delivery of messages is
* unlikely, if it would happen then we have a race
* between the set sticky and clear sticky messages. To
* cover this case we delete the old record and create a
* fresh one in UNPINNING.
*/
_dao.deletePin(task.getPin());
Pin pin = new Pin(task.getSubject(), task.getPnfsId());
pin.setState(UNPINNING);
_dao.storePin(pin);
} else {
/* We didn't create a sticky flag yet, so there is no
* reason to keep the record. It will expire by itself,
* but we delete the record now to avoid that we get
* tickets from admins wondering why they have records
* staying in PINNING.
*/
_dao.deletePin(task.getPin());
}
}
@Transactional
protected PinTask createTask(
PinManagerPinMessage message, MessageReply<PinManagerPinMessage> reply) {
PnfsId pnfsId = message.getFileAttributes().getPnfsId();
if (message.getRequestId() != null) {
Pin pin = _dao.getPin(pnfsId, message.getRequestId());
if (pin != null) {
/* In this case the request is a resubmission. If the
* previous pin completed then use it. Otherwise abort the
* previous pin and create a new one.
*/
if (pin.getState() == PINNED) {
message.setPin(pin);
reply.reply(message);
return null;
}
pin.setState(UNPINNING);
pin.setRequestId(null);
_dao.storePin(pin);
}
}
Pin pin = new Pin(message.getSubject(), pnfsId);
pin.setRequestId(message.getRequestId());
pin.setSticky("PinManager-" + UUID.randomUUID().toString());
pin.setExpirationTime(getExpirationTimeForPoolSelection());
return new PinTask(message, reply, _dao.storePin(pin));
}
@Transactional(isolation = REPEATABLE_READ)
protected void setToPinned(PinTask task) throws CacheException {
Pin pin = loadPinBelongingTo(task);
pin.setExpirationTime(task.getExpirationTime());
pin.setState(PINNED);
task.setPin(_dao.storePin(pin));
}
@Transactional(isolation = REPEATABLE_READ)
protected void setPool(PinTask task, String pool) throws CacheException {
Pin pin = loadPinBelongingTo(task);
pin.setExpirationTime(getExpirationTimeForSettingFlag());
pin.setPool(pool);
task.setPin(_dao.storePin(pin));
}
/**
* Load the pin belonging to the PinTask.
*
* @throw CacheException if the pin no longer exists or is no longer in PINNING.
*/
protected Pin loadPinBelongingTo(PinTask task) throws CacheException {
Pin pin = _dao.getPin(task.getPinId(), task.getSticky(), PINNING);
if (pin == null) {
throw new CacheException("Operation was aborted");
}
return pin;
}
@Transactional(isolation = REPEATABLE_READ)
protected void refreshTimeout(PinTask task, Date date) throws CacheException {
Pin pin = loadPinBelongingTo(task);
pin.setExpirationTime(date);
task.setPin(_dao.storePin(pin));
}