/**
* This generates a map for use on the recalculation and recovery of pending maps after reloading
* it
*
* @param queues
* @param pendingNonTXPageCounter
* @param txRecoverCounter
* @return
* @throws Exception
*/
private Map<SimpleString, Map<Long, Map<Long, List<PageCountPending>>>>
generateMapsOnPendingCount(
Map<Long, Queue> queues,
List<PageCountPending> pendingNonTXPageCounter,
Transaction txRecoverCounter)
throws Exception {
Map<SimpleString, Map<Long, Map<Long, List<PageCountPending>>>> perAddressMap = new HashMap<>();
for (PageCountPending pgCount : pendingNonTXPageCounter) {
long queueID = pgCount.getQueueID();
long pageID = pgCount.getPageID();
// We first figure what Queue is based on the queue id
Queue queue = queues.get(queueID);
if (queue == null) {
logger.debug(
"removing pending page counter id = "
+ pgCount.getID()
+ " as queueID="
+ pgCount.getID()
+ " no longer exists");
// this means the queue doesn't exist any longer, we will remove it from the storage
storageManager.deletePendingPageCounter(txRecoverCounter.getID(), pgCount.getID());
txRecoverCounter.setContainsPersistent();
continue;
}
// Level 1 on the structure, per address
SimpleString address = queue.getAddress();
Map<Long, Map<Long, List<PageCountPending>>> perPageMap = perAddressMap.get(address);
if (perPageMap == null) {
perPageMap = new HashMap<>();
perAddressMap.put(address, perPageMap);
}
Map<Long, List<PageCountPending>> perQueueMap = perPageMap.get(pageID);
if (perQueueMap == null) {
perQueueMap = new HashMap<>();
perPageMap.put(pageID, perQueueMap);
}
List<PageCountPending> pendingCounters = perQueueMap.get(queueID);
if (pendingCounters == null) {
pendingCounters = new LinkedList<>();
perQueueMap.put(queueID, pendingCounters);
}
pendingCounters.add(pgCount);
perQueueMap.put(queueID, pendingCounters);
}
return perAddressMap;
}
/**
* This method will recover the counters after failures making sure the page counter doesn't get
* out of sync
*
* @param pendingNonTXPageCounter
* @throws Exception
*/
@Override
public void recoverPendingPageCounters(List<PageCountPending> pendingNonTXPageCounter)
throws Exception {
// We need a structure of the following
// Address -> PageID -> QueueID -> List<PageCountPending>
// The following loop will sort the records according to the hierarchy we need
Transaction txRecoverCounter = new TransactionImpl(storageManager);
Map<SimpleString, Map<Long, Map<Long, List<PageCountPending>>>> perAddressMap =
generateMapsOnPendingCount(queues, pendingNonTXPageCounter, txRecoverCounter);
for (SimpleString address : perAddressMap.keySet()) {
PagingStore store = pagingManager.getPageStore(address);
Map<Long, Map<Long, List<PageCountPending>>> perPageMap = perAddressMap.get(address);
// We have already generated this before, so it can't be null
assert (perPageMap != null);
for (Long pageId : perPageMap.keySet()) {
Map<Long, List<PageCountPending>> perQueue = perPageMap.get(pageId);
// This can't be true!
assert (perQueue != null);
if (store.checkPageFileExists(pageId.intValue())) {
// on this case we need to recalculate the records
Page pg = store.createPage(pageId.intValue());
pg.open();
List<PagedMessage> pgMessages = pg.read(storageManager);
Map<Long, AtomicInteger> countsPerQueueOnPage = new HashMap<>();
for (PagedMessage pgd : pgMessages) {
if (pgd.getTransactionID() <= 0) {
for (long q : pgd.getQueueIDs()) {
AtomicInteger countQ = countsPerQueueOnPage.get(q);
if (countQ == null) {
countQ = new AtomicInteger(0);
countsPerQueueOnPage.put(q, countQ);
}
countQ.incrementAndGet();
}
}
}
for (Map.Entry<Long, List<PageCountPending>> entry : perQueue.entrySet()) {
for (PageCountPending record : entry.getValue()) {
logger.debug("Deleting pg tempCount " + record.getID());
storageManager.deletePendingPageCounter(txRecoverCounter.getID(), record.getID());
}
PageSubscriptionCounter counter =
store.getCursorProvider().getSubscription(entry.getKey()).getCounter();
AtomicInteger value = countsPerQueueOnPage.get(entry.getKey());
if (value == null) {
logger.debug("Page " + entry.getKey() + " wasn't open, so we will just ignore");
} else {
logger.debug("Replacing counter " + value.get());
counter.increment(txRecoverCounter, value.get());
}
}
} else {
// on this case the page file didn't exist, we just remove all the records since the page
// is already gone
logger.debug(
"Page "
+ pageId
+ " didn't exist on address "
+ address
+ ", so we are just removing records");
for (List<PageCountPending> records : perQueue.values()) {
for (PageCountPending record : records) {
logger.debug("Removing pending page counter " + record.getID());
storageManager.deletePendingPageCounter(txRecoverCounter.getID(), record.getID());
txRecoverCounter.setContainsPersistent();
}
}
}
}
}
txRecoverCounter.commit();
}