@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());
}
}
protected EnumSet<RequestContainerV5.RequestState> checkStaging(PinTask task) {
try {
Subject subject = task.getSubject();
StorageInfo info = task.getFileAttributes().getStorageInfo();
return _checkStagePermission.canPerformStaging(subject, info)
? RequestContainerV5.allStates
: RequestContainerV5.allStatesExceptStage;
} catch (PatternSyntaxException | IOException ex) {
_log.error("Failed to check stage permission: " + ex);
}
return RequestContainerV5.allStatesExceptStage;
}
private void askPoolManager(final PinTask task) {
PoolMgrSelectReadPoolMsg msg =
new PoolMgrSelectReadPoolMsg(
task.getFileAttributes(),
task.getProtocolInfo(),
task.getReadPoolSelectionContext(),
checkStaging(task));
msg.setSubject(task.getSubject());
msg.setSkipCostUpdate(true);
_poolManagerStub.send(
msg,
PoolMgrSelectReadPoolMsg.class,
new AbstractMessageCallback<PoolMgrSelectReadPoolMsg>() {
@Override
public void success(PoolMgrSelectReadPoolMsg msg) {
try {
/* Pool manager expects us
* to keep some state
* between retries.
*/
task.setReadPoolSelectionContext(msg.getContext());
/* Store the pool name in
* the DB so we know what to
* clean up if something
* fails.
*/
String poolName = msg.getPoolName();
CellAddressCore poolAddress = msg.getPoolAddress();
task.getFileAttributes().getLocations().add(poolName);
setPool(task, poolName);
setStickyFlag(task, poolName, poolAddress);
} catch (CacheException e) {
fail(task, e.getRc(), e.getMessage());
} catch (RuntimeException e) {
fail(task, CacheException.UNEXPECTED_SYSTEM_EXCEPTION, e.toString());
}
}
@Override
public void failure(int rc, Object error) {
/* Pool manager expects us to
* keep some state between
* retries.
*/
task.setReadPoolSelectionContext(getReply().getContext());
switch (rc) {
case CacheException.OUT_OF_DATE:
/* Pool manager asked for a
* refresh of the request.
* Retry right away.
*/
retry(task, 0);
break;
case CacheException.FILE_NOT_IN_REPOSITORY:
case CacheException.PERMISSION_DENIED:
fail(task, rc, error.toString());
break;
default:
/* Ideally we would delegate the retry to the door,
* but for the time being the retry is dealed with
* by pin manager.
*/
retry(task, RETRY_DELAY);
break;
}
}
@Override
public void noroute(CellPath path) {
/* Pool manager is
* unreachable. We expect this
* to be transient and retry in
* a moment.
*/
retry(task, RETRY_DELAY);
}
@Override
public void timeout(CellPath path) {
/* Pool manager did not
* respond. We expect this to be
* transient and retry in a
* moment.
*/
retry(task, SMALL_DELAY);
}
});
}