@Override
public Void call() throws Exception {
final GroupKey firstKey = new GroupKey(fileId, 0);
final GroupKey lastKey = new GroupKey(fileId, Long.MAX_VALUE);
NavigableMap<GroupKey, WriteGroup> subMap = writeGroups.subMap(firstKey, true, lastKey, true);
Iterator<Map.Entry<GroupKey, WriteGroup>> entryIterator = subMap.entrySet().iterator();
while (entryIterator.hasNext()) {
Map.Entry<GroupKey, WriteGroup> entry = entryIterator.next();
WriteGroup writeGroup = entry.getValue();
GroupKey groupKey = entry.getKey();
lockManager.acquireLock(Thread.currentThread(), groupKey, OLockManager.LOCK.EXCLUSIVE);
try {
for (OCachePointer pagePointer : writeGroup.pages) {
if (pagePointer != null) {
pagePointer.acquireExclusiveLock();
try {
pagePointer.decrementReferrer();
cacheSize.decrementAndGet();
} finally {
pagePointer.releaseExclusiveLock();
}
}
}
entryIterator.remove();
} finally {
lockManager.releaseLock(Thread.currentThread(), groupKey, OLockManager.LOCK.EXCLUSIVE);
}
}
return null;
}
@Override
public Void call() throws Exception {
final GroupKey firstKey = new GroupKey(fileId, 0);
final GroupKey lastKey = new GroupKey(fileId, Long.MAX_VALUE);
NavigableMap<GroupKey, WriteGroup> subMap = writeGroups.subMap(firstKey, true, lastKey, true);
Iterator<Map.Entry<GroupKey, WriteGroup>> entryIterator = subMap.entrySet().iterator();
groupsLoop:
while (entryIterator.hasNext()) {
Map.Entry<GroupKey, WriteGroup> entry = entryIterator.next();
final WriteGroup writeGroup = entry.getValue();
final GroupKey groupKey = entry.getKey();
lockManager.acquireLock(Thread.currentThread(), groupKey, OLockManager.LOCK.EXCLUSIVE);
try {
int flushedPages = 0;
for (int i = 0; i < 16; i++) {
OCachePointer pagePointer = writeGroup.pages[i];
if (pagePointer != null) {
if (!pagePointer.tryAcquireExclusiveLock()) continue groupsLoop;
try {
flushPage(
groupKey.fileId, (groupKey.groupIndex << 4) + i, pagePointer.getDataPointer());
flushedPages++;
} finally {
pagePointer.releaseExclusiveLock();
}
}
}
for (OCachePointer pagePointer : writeGroup.pages)
if (pagePointer != null) pagePointer.decrementReferrer();
cacheSize.addAndGet(-flushedPages);
entryIterator.remove();
} finally {
lockManager.releaseLock(
Thread.currentThread(), entry.getKey(), OLockManager.LOCK.EXCLUSIVE);
}
}
files.get(fileId).synch();
return null;
}
private int iterateBySubRing(
NavigableMap<GroupKey, WriteGroup> subMap,
int writeGroupsToFlush,
int flushedWriteGroups,
boolean forceFlush)
throws IOException {
Iterator<Map.Entry<GroupKey, WriteGroup>> entriesIterator = subMap.entrySet().iterator();
long currentTime = System.currentTimeMillis();
groupsLoop:
while (entriesIterator.hasNext() && flushedWriteGroups < writeGroupsToFlush) {
Map.Entry<GroupKey, WriteGroup> entry = entriesIterator.next();
final WriteGroup group = entry.getValue();
final GroupKey groupKey = entry.getKey();
final boolean weakLockMode = group.creationTime - currentTime < groupTTL && !forceFlush;
if (group.recencyBit && weakLockMode) {
group.recencyBit = false;
continue;
}
lockManager.acquireLock(
Thread.currentThread(), entry.getKey(), OLockManager.LOCK.EXCLUSIVE);
try {
if (group.recencyBit && weakLockMode) group.recencyBit = false;
else {
group.recencyBit = false;
int flushedPages = 0;
for (int i = 0; i < 16; i++) {
final OCachePointer pagePointer = group.pages[i];
if (pagePointer != null) {
if (!pagePointer.tryAcquireExclusiveLock()) continue groupsLoop;
try {
flushPage(
groupKey.fileId,
(groupKey.groupIndex << 4) + i,
pagePointer.getDataPointer());
flushedPages++;
final OLogSequenceNumber flushedLSN =
ODurablePage.getLogSequenceNumberFromPage(pagePointer.getDataPointer());
pagePointer.setLastFlushedLsn(flushedLSN);
} finally {
pagePointer.releaseExclusiveLock();
}
}
}
for (OCachePointer pagePointer : group.pages)
if (pagePointer != null) pagePointer.decrementReferrer();
entriesIterator.remove();
flushedWriteGroups++;
cacheSize.addAndGet(-flushedPages);
}
} finally {
lockManager.releaseLock(
Thread.currentThread(), entry.getKey(), OLockManager.LOCK.EXCLUSIVE);
}
lastGroupKey = groupKey;
}
return flushedWriteGroups;
}
