/** This method is synchronized because we want it to be atomic with the cursors being used */
private long checkMinPage(Collection<PageSubscription> cursorList) {
long minPage = Long.MAX_VALUE;
for (PageSubscription cursor : cursorList) {
long firstPage = cursor.getFirstPage();
if (HornetQServerLogger.LOGGER.isDebugEnabled()) {
HornetQServerLogger.LOGGER.debug(
this.pagingStore.getAddress()
+ " has a cursor "
+ cursor
+ " with first page="
+ firstPage);
}
// the cursor will return -1 if the cursor is empty
if (firstPage >= 0 && firstPage < minPage) {
minPage = firstPage;
}
}
if (HornetQServerLogger.LOGGER.isDebugEnabled()) {
HornetQServerLogger.LOGGER.debug(this.pagingStore.getAddress() + " has minPage=" + minPage);
}
return minPage;
}
public void processReload() throws Exception {
for (PageSubscription cursor : this.activeCursors.values()) {
cursor.processReload();
}
cleanup();
}
public void stop() {
for (PageSubscription cursor : activeCursors.values()) {
cursor.stop();
}
waitForFuture();
}
public void flushExecutors() {
for (PageSubscription cursor : activeCursors.values()) {
cursor.flushExecutors();
}
Future future = new Future();
executor.execute(future);
while (!future.await(10000)) {
log.warn("Waiting cursor provider " + this + " to finish executors " + executor);
}
}
/**
* @param cursorList
* @param currentPage
* @throws Exception
*/
private void storePositions(ArrayList<PageSubscription> cursorList, Page currentPage)
throws Exception {
try {
// First step: Move every cursor to the next bookmarked page (that was just created)
for (PageSubscription cursor : cursorList) {
cursor.confirmPosition(new PagePositionImpl(currentPage.getPageId(), -1));
}
while (!storageManager.waitOnOperations(5000)) {
log.warn("Couldn't complete operations on IO context " + storageManager.getContext());
}
} finally {
for (PageSubscription cursor : cursorList) {
cursor.enableAutoCleanup();
}
}
}
/**
* @param cursorList
* @param currentPage
* @throws Exception
*/
protected void storeBookmark(ArrayList<PageSubscription> cursorList, Page currentPage)
throws Exception {
try {
// First step: Move every cursor to the next bookmarked page (that was just created)
for (PageSubscription cursor : cursorList) {
cursor.confirmPosition(new PagePositionImpl(currentPage.getPageId(), -1));
}
while (!storageManager.waitOnOperations(5000)) {
HornetQServerLogger.LOGGER.problemCompletingOperations(storageManager.getContext());
}
} finally {
for (PageSubscription cursor : cursorList) {
cursor.enableAutoCleanup();
}
}
}
/**
* Delete everything associated with any queue on this address. This is to be called when the
* address is about to be released from paging. Hence the PagingStore will be holding a write
* lock, meaning no messages are going to be paged at this time. So, we shouldn't lock anything
* after this method, to avoid dead locks between the writeLock and any synchronization with the
* CursorProvider.
*/
public void onPageModeCleared() {
ArrayList<PageSubscription> subscriptions = cloneSubscriptions();
Transaction tx = new TransactionImpl(storageManager);
for (PageSubscription sub : subscriptions) {
try {
sub.onPageModeCleared(tx);
} catch (Exception e) {
HornetQServerLogger.LOGGER.warn(
"Error while cleaning paging on queue " + sub.getQueue().getName(), e);
}
}
try {
tx.commit();
} catch (Exception e) {
HornetQServerLogger.LOGGER.warn("Error while cleaning page, during the commit", e);
}
}
/** This method is synchronized because we want it to be atomic with the cursors being used */
private long checkMinPage(List<PageSubscription> cursorList) {
long minPage = Long.MAX_VALUE;
for (PageSubscription cursor : cursorList) {
long firstPage = cursor.getFirstPage();
if (log.isDebugEnabled()) {
log.debug(
this.pagingStore.getAddress()
+ " has a cursor "
+ cursor
+ " with first page="
+ firstPage);
}
if (firstPage < minPage) {
minPage = firstPage;
}
}
if (log.isDebugEnabled()) {
log.debug(this.pagingStore.getAddress() + " has minPage=" + minPage);
}
return minPage;
}
public void processReload() throws Exception {
Collection<PageSubscription> cursorList = this.activeCursors.values();
for (PageSubscription cursor : cursorList) {
cursor.processReload();
}
if (!cursorList.isEmpty()) {
// https://issues.jboss.org/browse/JBPAPP-10338 if you ack out of order,
// the min page could be beyond the first page.
// we have to reload any previously acked message
long cursorsMinPage = checkMinPage(cursorList);
// checkMinPage will return MaxValue if there aren't any pages or any cursors
if (cursorsMinPage != Long.MAX_VALUE) {
for (long startPage = pagingStore.getFirstPage(); startPage < cursorsMinPage; startPage++) {
for (PageSubscription cursor : cursorList) {
cursor.reloadPageInfo(startPage);
}
}
}
}
cleanup();
}
public void cleanup() {
ArrayList<Page> depagedPages = new ArrayList<Page>();
while (true) {
if (pagingStore.lock(100)) {
break;
}
if (!pagingStore.isStarted()) return;
}
synchronized (this) {
try {
if (!pagingStore.isStarted()) {
return;
}
if (pagingStore.getNumberOfPages() == 0) {
return;
}
if (log.isDebugEnabled()) {
log.debug("Asserting cleanup for address " + this.pagingStore.getAddress());
}
ArrayList<PageSubscription> cursorList = new ArrayList<PageSubscription>();
cursorList.addAll(activeCursors.values());
long minPage = checkMinPage(cursorList);
if (minPage == pagingStore.getCurrentWritingPage()
&& pagingStore.getCurrentPage().getNumberOfMessages() > 0) {
boolean complete = true;
for (PageSubscription cursor : cursorList) {
if (!cursor.isComplete(minPage)) {
if (log.isDebugEnabled()) {
log.debug("Cursor " + cursor + " was considered incomplete at page " + minPage);
}
complete = false;
break;
} else {
if (log.isDebugEnabled()) {
log.debug("Cursor " + cursor + "was considered **complete** at page " + minPage);
}
}
}
if (!pagingStore.isStarted()) {
return;
}
if (complete) {
if (log.isDebugEnabled()) {
log.debug(
"Address "
+ pagingStore.getAddress()
+ " is leaving page mode as all messages are consumed and acknowledged from the page store");
}
pagingStore.forceAnotherPage();
Page currentPage = pagingStore.getCurrentPage();
storePositions(cursorList, currentPage);
pagingStore.stopPaging();
// This has to be called after we stopped paging
for (PageSubscription cursor : cursorList) {
cursor.scheduleCleanupCheck();
}
}
}
for (long i = pagingStore.getFirstPage(); i < minPage; i++) {
Page page = pagingStore.depage();
if (page == null) {
break;
}
depagedPages.add(page);
}
if (pagingStore.getNumberOfPages() == 0
|| pagingStore.getNumberOfPages() == 1
&& pagingStore.getCurrentPage().getNumberOfMessages() == 0) {
pagingStore.stopPaging();
} else {
if (log.isTraceEnabled()) {
log.trace(
"Couldn't cleanup page on address "
+ this.pagingStore.getAddress()
+ " as numberOfPages == "
+ pagingStore.getNumberOfPages()
+ " and currentPage.numberOfMessages = "
+ pagingStore.getCurrentPage().getNumberOfMessages());
}
}
} catch (Exception ex) {
log.warn("Couldn't complete cleanup on paging", ex);
return;
} finally {
pagingStore.unlock();
}
}
try {
for (Page depagedPage : depagedPages) {
PageCache cache;
PagedMessage[] pgdMessages;
synchronized (softCache) {
cache = softCache.get((long) depagedPage.getPageId());
}
if (isTrace) {
log.trace("Removing page " + depagedPage.getPageId() + " from page-cache");
}
if (cache == null) {
// The page is not on cache any more
// We need to read the page-file before deleting it
// to make sure we remove any large-messages pending
storageManager.beforePageRead();
List<PagedMessage> pgdMessagesList = null;
try {
depagedPage.open();
pgdMessagesList = depagedPage.read(storageManager);
} finally {
try {
depagedPage.close();
} catch (Exception e) {
}
storageManager.afterPageRead();
}
depagedPage.close();
pgdMessages = pgdMessagesList.toArray(new PagedMessage[pgdMessagesList.size()]);
} else {
pgdMessages = cache.getMessages();
}
depagedPage.delete(pgdMessages);
synchronized (softCache) {
softCache.remove((long) depagedPage.getPageId());
}
}
} catch (Exception ex) {
log.warn("Couldn't complete cleanup on paging", ex);
return;
}
}
public void close(PageSubscription cursor) {
activeCursors.remove(cursor.getId());
scheduleCleanup();
}
protected void onDeletePage(Page deletedPage) throws Exception {
List<PageSubscription> subscriptions = cloneSubscriptions();
for (PageSubscription subs : subscriptions) {
subs.onDeletePage(deletedPage);
}
}
public void cleanup() {
ArrayList<Page> depagedPages = new ArrayList<Page>();
while (true) {
if (pagingStore.lock(100)) {
break;
}
if (!pagingStore.isStarted()) return;
}
synchronized (this) {
try {
if (!pagingStore.isStarted()) {
return;
}
if (pagingStore.getNumberOfPages() == 0) {
return;
}
if (HornetQServerLogger.LOGGER.isDebugEnabled()) {
HornetQServerLogger.LOGGER.debug(
"Asserting cleanup for address " + this.pagingStore.getAddress());
}
ArrayList<PageSubscription> cursorList = cloneSubscriptions();
long minPage = checkMinPage(cursorList);
// if the current page is being written...
// on that case we need to move to verify it in a different way
if (minPage == pagingStore.getCurrentWritingPage()
&& pagingStore.getCurrentPage().getNumberOfMessages() > 0) {
boolean complete = true;
for (PageSubscription cursor : cursorList) {
if (!cursor.isComplete(minPage)) {
if (HornetQServerLogger.LOGGER.isDebugEnabled()) {
HornetQServerLogger.LOGGER.debug(
"Cursor " + cursor + " was considered incomplete at page " + minPage);
}
complete = false;
break;
} else {
if (HornetQServerLogger.LOGGER.isDebugEnabled()) {
HornetQServerLogger.LOGGER.debug(
"Cursor " + cursor + "was considered **complete** at page " + minPage);
}
}
}
if (!pagingStore.isStarted()) {
return;
}
// All the pages on the cursor are complete.. so we will cleanup everything and store a
// bookmark
if (complete) {
if (HornetQServerLogger.LOGGER.isDebugEnabled()) {
HornetQServerLogger.LOGGER.debug(
"Address "
+ pagingStore.getAddress()
+ " is leaving page mode as all messages are consumed and acknowledged from the page store");
}
pagingStore.forceAnotherPage();
Page currentPage = pagingStore.getCurrentPage();
storeBookmark(cursorList, currentPage);
pagingStore.stopPaging();
}
}
for (long i = pagingStore.getFirstPage(); i < minPage; i++) {
Page page = pagingStore.depage();
if (page == null) {
break;
}
depagedPages.add(page);
}
if (pagingStore.getNumberOfPages() == 0
|| pagingStore.getNumberOfPages() == 1
&& pagingStore.getCurrentPage().getNumberOfMessages() == 0) {
pagingStore.stopPaging();
} else {
if (HornetQServerLogger.LOGGER.isTraceEnabled()) {
HornetQServerLogger.LOGGER.trace(
"Couldn't cleanup page on address "
+ this.pagingStore.getAddress()
+ " as numberOfPages == "
+ pagingStore.getNumberOfPages()
+ " and currentPage.numberOfMessages = "
+ pagingStore.getCurrentPage().getNumberOfMessages());
}
}
} catch (Exception ex) {
HornetQServerLogger.LOGGER.problemCleaningPageAddress(ex, pagingStore.getAddress());
return;
} finally {
pagingStore.unlock();
}
}
try {
for (Page depagedPage : depagedPages) {
PageCache cache;
PagedMessage[] pgdMessages;
synchronized (softCache) {
cache = softCache.get((long) depagedPage.getPageId());
}
if (isTrace) {
HornetQServerLogger.LOGGER.trace(
"Removing page " + depagedPage.getPageId() + " from page-cache");
}
if (cache == null) {
// The page is not on cache any more
// We need to read the page-file before deleting it
// to make sure we remove any large-messages pending
storageManager.beforePageRead();
List<PagedMessage> pgdMessagesList = null;
try {
depagedPage.open();
pgdMessagesList = depagedPage.read(storageManager);
} finally {
try {
depagedPage.close();
} catch (Exception e) {
}
storageManager.afterPageRead();
}
depagedPage.close();
pgdMessages = pgdMessagesList.toArray(new PagedMessage[pgdMessagesList.size()]);
} else {
pgdMessages = cache.getMessages();
}
depagedPage.delete(pgdMessages);
onDeletePage(depagedPage);
synchronized (softCache) {
softCache.remove((long) depagedPage.getPageId());
}
}
} catch (Exception ex) {
HornetQServerLogger.LOGGER.problemCleaningPageAddress(ex, pagingStore.getAddress());
return;
}
}
public void flushExecutors() {
for (PageSubscription cursor : activeCursors.values()) {
cursor.flushExecutors();
}
waitForFuture();
}