@Override
public void reset(int size) {
// reset allocations/frees count first, as it's not used
// for any functionality but to show information
metrics.reset();
// --- used
try {
usedLock.writeLock().lock();
used.clear();
usedMemorySize.set(0);
} finally {
usedLock.writeLock().unlock();
}
metrics.mark("vmtable.usedSize", usedMemorySize.longValue());
metrics.mark("vmtable.usedBlocksCount", used.size());
// --- free
try {
freeLock.writeLock().lock();
free.clear();
free.add(new TableBlock(0, size));
freeMemorySize.set(size);
} finally {
freeLock.writeLock().unlock();
}
metrics.mark("vmtable.freeSize", freeMemorySize.longValue());
metrics.mark("vmtable.freeBlocksCount", free.size());
}
/** longValue returns current value. */
public void testLongValue() {
AtomicInteger ai = new AtomicInteger();
assertEquals(0L, ai.longValue());
for (int x : VALUES) {
ai.set(x);
assertEquals((long) x, ai.longValue());
}
}
@Override
public Block allocate(int size) {
if (size <= 0) {
throw new OutOfBoundException("Size can't be negative or be zero: " + size);
}
metrics.increment("vmtable.totalAllocations");
TimeContext timer = metrics.getTimer("vmtable.allocationTime");
timer.start();
final TableBlock freeBlock = findBlockToAllocateFrom(size);
if (freeBlock != null) {
final TableBlock result;
try {
result = new TableBlock(freeBlock.getAddress(), size);
if (freeBlock.getSize() == size) {
freeBlock.resize(0, 0);
removeBlock(free, freeBlock, freeLock);
metrics.decrement("vmtable.fragmentation");
} else {
freeBlock.resize(freeBlock.getAddress() + size, freeBlock.getSize() - size);
metrics.increment("vmtable.fragmentation");
}
freeMemorySize.addAndGet(-size);
} finally {
// unlock asap
freeBlock.unlock();
}
insertBlock(used, result, usedLock);
usedMemorySize.addAndGet(size);
timer.stop();
metrics.mark("vmtable.freeSize", freeMemorySize.longValue());
metrics.mark("vmtable.usedSize", usedMemorySize.longValue());
metrics.mark("vmtable.freeBlocksCount", free.size());
metrics.mark("vmtable.usedBlocksCount", used.size());
return result;
}
timer.stop();
metrics.increment("vmtable.failedAllocations");
return null;
}
/** 1. 从Number中继承过来的几个方法， 并实现了它。 */
public void testValue() {
AtomicInteger ai = new AtomicInteger(22);
System.out.println(ai.byteValue());
System.out.println(ai.shortValue());
System.out.println(ai.intValue());
System.out.println(ai.longValue());
System.out.println(ai.floatValue());
System.out.println(ai.doubleValue());
}
@Override
public boolean free(Block block) {
if (block == null) {
return false;
}
metrics.increment("vmtable.totalFrees");
TimeContext timer = metrics.getTimer("vmtable.freeTime");
timer.start();
TableBlock tableBlock = getSimilarBlock(used, block, usedLock);
if (tableBlock != null) {
if (removeBlock(used, tableBlock, usedLock)) {
int size = tableBlock.getSize();
usedMemorySize.addAndGet(-size);
addFreeBlock(new TableBlock(tableBlock.getAddress(), tableBlock.getSize()));
freeMemorySize.addAndGet(size);
tableBlock.resize(0, 0);
tableBlock.unlock();
timer.stop();
metrics.mark("vmtable.freeSize", freeMemorySize.longValue());
metrics.mark("vmtable.usedSize", usedMemorySize.longValue());
metrics.mark("vmtable.freeBlocksCount", free.size());
metrics.mark("vmtable.usedBlocksCount", used.size());
return true;
}
}
timer.stop();
metrics.increment("vmtable.failedFrees");
return false;
}
@Override
public long synchronizeData(final Cache<Object, Object> cache) throws CacheException {
int threads = Runtime.getRuntime().availableProcessors();
PersistenceManager loaderManager = getPersistenceManager(cache);
Set<CLInterfaceLoader> loaders = loaderManager.getStores(CLInterfaceLoader.class);
for (CLInterfaceLoader loader : loaders) {
MarshalledEntry loadedKnownKey = loader.load(KNOWN_KEY);
if (loadedKnownKey != null) {
Set<Object> keys;
try {
keys = jsonMapper.readValue((String) loadedKnownKey.getValue(), HashSet.class);
} catch (IOException e) {
throw new CacheException("Unable to read JSON value: " + loadedKnownKey.getValue(), e);
}
ExecutorService es = Executors.newFixedThreadPool(threads);
final AtomicInteger count = new AtomicInteger(0);
for (final Object key : keys) {
es.submit(
new Runnable() {
@Override
public void run() {
try {
cache.get(key);
int i = count.getAndIncrement();
if (log.isDebugEnabled() && i % 100 == 0)
log.debugf(">> Moved %s keys\n", i);
} catch (Exception e) {
log.keyMigrationFailed(Util.toStr(key), e);
}
}
});
}
es.shutdown();
try {
while (!es.awaitTermination(500, TimeUnit.MILLISECONDS)) ;
} catch (InterruptedException e) {
throw new CacheException(e);
}
return count.longValue();
}
}
throw log.missingMigrationData(cache.getName());
}
long getDeadlockCount() {
return deadlockCount.longValue();
}
