pagedInMessagesLock.writeLock().lock();
try {
if(isPrioritizedMessages()) {
resultList = new PrioritizedPendingList();
} else {
resultList = new OrderedPendingList();
}
for (QueueMessageReference ref : result) {
if (!pagedInMessages.containsKey(ref.getMessageId())) {
pagedInMessages.put(ref.getMessageId(), ref);
resultList.addMessageLast(ref);
} else {
ref.decrementReferenceCount();
// store should have trapped duplicate in it's index, also cursor audit
// we need to remove the duplicate from the store in the knowledge that the original message may be inflight
// note: jdbc store will not trap unacked messages as a duplicate b/c it gives each message a unique sequence id
LOG.warn("{}, duplicate message {} paged in, is cursor audit disabled? Removing from store and redirecting to dlq", this, ref.getMessage());
if (store != null) {
ConnectionContext connectionContext = createConnectionContext();
store.removeMessage(connectionContext, new MessageAck(ref.getMessage(), MessageAck.POSION_ACK_TYPE, 1));
broker.getRoot().sendToDeadLetterQueue(connectionContext, ref.getMessage(), null, new Throwable("duplicate paged in from store for " + destination));
}
}
}
} finally {
pagedInMessagesLock.writeLock().unlock();
}
} else {
// Avoid return null list, if condition is not validated
resultList = new OrderedPendingList();
}
return resultList;
}