/**
* Assigns a new ticket id.
*
* @param repository
* @return a new long id
*/
@Override
public synchronized long assignNewId(RepositoryModel repository) {
long newId = 0L;
Repository db = repositoryManager.getRepository(repository.name);
try {
if (getTicketsBranch(db) == null) {
createTicketsBranch(db);
}
// identify current highest ticket id by scanning the paths in the tip tree
if (!lastAssignedId.containsKey(repository.name)) {
lastAssignedId.put(repository.name, new AtomicLong(0));
}
AtomicLong lastId = lastAssignedId.get(repository.name);
if (lastId.get() <= 0) {
Set<Long> ids = getIds(repository);
for (long id : ids) {
if (id > lastId.get()) {
lastId.set(id);
}
}
}
// assign the id and touch an empty journal to hold it's place
newId = lastId.incrementAndGet();
String journalPath = toTicketPath(newId) + "/" + JOURNAL;
writeTicketsFile(db, journalPath, "", "gitblit", "assigned id #" + newId);
} finally {
db.close();
}
return newId;
}
boolean compare(AtomicLongRunOnGpu grhs) {
if (grhs == null) {
System.out.println("grhs == null");
return false;
}
if (m_Num1 != grhs.m_Num1) {
System.out.println("num1");
System.out.println("lhs: " + m_Num1);
System.out.println("rhs: " + grhs.m_Num1);
return false;
}
if (m_ALong.get() != grhs.m_ALong.get()) {
System.out.println("value");
System.out.println("lhs: " + m_ALong.get());
System.out.println("rhs: " + grhs.m_ALong.get());
return false;
}
if (m_Num2 != grhs.m_Num2) {
System.out.println("num2");
System.out.println("lhs: " + m_Num2);
System.out.println("rhs: " + grhs.m_Num2);
return false;
}
if (grhs.m_Random == -100) {
System.out.println("random");
return false;
}
if (grhs.m_Random2 == -100) {
System.out.println("random2");
return false;
}
return true;
}
@Test
public void testPollWait() throws InterruptedException, IOException {
final FileBlockingQueue<String> queue = getFileBlockingQueue();
final AtomicLong start = new AtomicLong(System.currentTimeMillis());
String m = queue.poll(1000, TimeUnit.MILLISECONDS);
final AtomicLong duration = new AtomicLong(System.currentTimeMillis() - start.get());
assertTrue(duration.get() >= 1000 && duration.get() <= 2000);
assertNull(m);
ExecutorService e = Executors.newFixedThreadPool(1);
e.execute(
new Runnable() {
@Override
public void run() {
start.set(System.currentTimeMillis());
String m = null;
try {
m = queue.poll(5000, TimeUnit.MILLISECONDS);
} catch (InterruptedException e1) {
throw new RuntimeException(e1);
}
assertNotNull(m);
duration.set(System.currentTimeMillis() - start.get());
}
});
Thread.sleep(1000);
queue.offer("testString");
assertTrue(duration.get() < 4000);
}
/** 检查是否存在需要get的数据,并且数量>=batchSize */
private boolean checkUnGetSlotAt(LogPosition startPosition, int batchSize) {
if (batchMode.isItemSize()) {
long current = getSequence.get();
long maxAbleSequence = putSequence.get();
long next = current;
if (startPosition == null
|| !startPosition.getPostion().isIncluded()) { // 第一次订阅之后，需要包含一下start位置，防止丢失第一条记录
next = next + 1; // 少一条数据
}
if (current < maxAbleSequence && next + batchSize - 1 <= maxAbleSequence) {
return true;
} else {
return false;
}
} else {
// 处理内存大小判断
long currentSize = getMemSize.get();
long maxAbleSize = putMemSize.get();
if (maxAbleSize - currentSize >= batchSize * bufferMemUnit) {
return true;
} else {
return false;
}
}
}
public LogPosition getFirstPosition() throws CanalStoreException {
final ReentrantLock lock = this.lock;
lock.lock();
try {
long firstSeqeuence = ackSequence.get();
if (firstSeqeuence == INIT_SQEUENCE && firstSeqeuence < putSequence.get()) {
// 没有ack过数据
Event event = entries[getIndex(firstSeqeuence + 1)]; // 最后一次ack为-1，需要移动到下一条,included
// = false
return CanalEventUtils.createPosition(event, false);
} else if (firstSeqeuence > INIT_SQEUENCE && firstSeqeuence < putSequence.get()) {
// ack未追上put操作
Event event = entries[getIndex(firstSeqeuence + 1)]; // 最后一次ack的位置数据
// + 1
return CanalEventUtils.createPosition(event, true);
} else if (firstSeqeuence > INIT_SQEUENCE && firstSeqeuence == putSequence.get()) {
// 已经追上，store中没有数据
Event event = entries[getIndex(firstSeqeuence)]; // 最后一次ack的位置数据，和last为同一条，included
// = false
return CanalEventUtils.createPosition(event, false);
} else {
// 没有任何数据
return null;
}
} finally {
lock.unlock();
}
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeLong(ownedEntryCount);
out.writeLong(ownedEntryMemoryCost);
out.writeLong(hits.get());
out.writeLong(misses.get());
}
/** addAndGet adds given value to current, and returns current value */
public void testAddAndGet() {
AtomicLong ai = new AtomicLong(1);
assertEquals(3, ai.addAndGet(2));
assertEquals(3, ai.get());
assertEquals(-1, ai.addAndGet(-4));
assertEquals(-1, ai.get());
}
void updateLastModified(long time) {
for (long current = lastModified.get(); time > current; current = lastModified.get()) {
if (lastModified.compareAndSet(current, time)) {
return;
}
}
}
public void updateMemoryUsageStats(Tablet tablet, long size, long mincSize) {
// do not want to update stats for every little change,
// so only do it under certain circumstances... the reason
// for this is that reporting stats acquires a lock, do
// not want all tablets locking on the same lock for every
// commit
long totalSize = size + mincSize;
long lrs = lastReportedSize.get();
long delta = totalSize - lrs;
long lrms = lastReportedMincSize.get();
boolean report = false;
// the atomic longs are considered independently, when one is set
// the other is not set intentionally because this method is not
// synchronized... therefore there are not transactional semantics
// for reading and writing two variables
if ((lrms > 0 && mincSize == 0 || lrms == 0 && mincSize > 0)
&& lastReportedMincSize.compareAndSet(lrms, mincSize)) {
report = true;
}
long currentTime = System.currentTimeMillis();
if ((delta > 32000 || delta < 0 || (currentTime - lastReportedCommitTime > 1000))
&& lastReportedSize.compareAndSet(lrs, totalSize)) {
if (delta > 0) lastReportedCommitTime = currentTime;
report = true;
}
if (report) memMgmt.updateMemoryUsageStats(tablet, size, lastReportedCommitTime, mincSize);
}
/** Called by BlockWriter to actually write the block. */
void writeFromBlockWriter() throws IOException {
do {
long dirty = _dirtyRange.getAndSet(INIT_DIRTY);
int dirtyMax = (int) (dirty >> 32);
int dirtyMin = (int) dirty;
if (dirtyMin < dirtyMax) {
if (log.isLoggable(Level.ALL))
log.log(Level.ALL, "write db-block " + this + " [" + dirtyMin + ", " + dirtyMax + "]");
boolean isPriority = false;
writeImpl(dirtyMin, dirtyMax - dirtyMin, isPriority);
}
if (_dirtyRange.get() == INIT_DIRTY && !isDestroyed()) {
toValid();
}
} while (_dirtyRange.get() != INIT_DIRTY);
if (_useCount.get() <= 0) {
freeImpl();
}
}
@Override
@Test(timeout = 30000)
public void testMessageSizeOneDurablePartialConsumption() throws Exception {
AtomicLong publishedMessageSize = new AtomicLong();
Connection connection = new ActiveMQConnectionFactory(brokerConnectURI).createConnection();
connection.setClientID("clientId");
connection.start();
SubscriptionKey subKey = new SubscriptionKey("clientId", "sub1");
org.apache.activemq.broker.region.Topic dest =
publishTestMessagesDurable(
connection, new String[] {"sub1"}, 200, publishedMessageSize, DeliveryMode.PERSISTENT);
// verify the count and size - durable is offline so all 200 should be pending since none are in
// prefetch
verifyPendingStats(dest, subKey, 200, publishedMessageSize.get());
// The expected value is only 100 because for durables a LRUCache is being used
// with a max size of 100
verifyStoreStats(dest, 100, publishedMessageSize.get());
// consume all messages
consumeDurableTestMessages(connection, "sub1", 50, publishedMessageSize);
// All messages should now be gone
verifyPendingStats(dest, subKey, 150, publishedMessageSize.get());
// The expected value is only 100 because for durables a LRUCache is being used
// with a max size of 100
// verify the size is at least as big as 100 messages times the minimum of 100 size
verifyStoreStats(dest, 100, 100 * 100);
connection.close();
}
public void receive(Message msg) {
byte[] buf = msg.getRawBuffer();
byte type = buf[msg.getOffset()];
switch (type) {
case START:
ByteBuffer tmp = ByteBuffer.wrap(buf, 1 + msg.getOffset(), Global.LONG_SIZE);
num_msgs = (int) tmp.getLong();
print = num_msgs / 10;
current_value.set(0);
total_bytes.set(0);
start = System.currentTimeMillis();
break;
case DATA:
long new_val = current_value.incrementAndGet();
total_bytes.addAndGet(msg.getLength() - Global.INT_SIZE);
if (print > 0 && new_val % print == 0) System.out.println("received " + new_val);
if (new_val >= num_msgs) {
long time = System.currentTimeMillis() - start;
double msgs_sec = (current_value.get() / (time / 1000.0));
double throughput = total_bytes.get() / (time / 1000.0);
System.out.println(
String.format(
"\nreceived %d messages in %d ms (%.2f msgs/sec), throughput=%s",
current_value.get(), time, msgs_sec, Util.printBytes(throughput)));
break;
}
break;
default:
System.err.println("Type " + type + " is invalid");
}
}
private synchronized void syncLog(ILogRecord logRecord) throws ACIDException {
ITransactionContext txnCtx = null;
if (logRecord.getLogType() != LogType.FLUSH) {
txnCtx = logRecord.getTxnCtx();
if (txnCtx.getTxnState() == ITransactionManager.ABORTED
&& logRecord.getLogType() != LogType.ABORT) {
throw new ACIDException(
"Aborted job(" + txnCtx.getJobId() + ") tried to write non-abort type log record.");
}
}
if (getLogFileOffset(appendLSN.get()) + logRecord.getLogSize() > logFileSize) {
prepareNextLogFile();
appendPage.isFull(true);
getAndInitNewPage();
} else if (!appendPage.hasSpace(logRecord.getLogSize())) {
appendPage.isFull(true);
getAndInitNewPage();
}
if (logRecord.getLogType() == LogType.UPDATE) {
logRecord.setPrevLSN(txnCtx.getLastLSN());
}
appendPage.append(logRecord, appendLSN.get());
if (logRecord.getLogType() == LogType.FLUSH) {
logRecord.setLSN(appendLSN.get());
}
appendLSN.addAndGet(logRecord.getLogSize());
}
@Override
public boolean checkMemory(final Runnable runWhenAvailable) {
if (addressFullMessagePolicy == AddressFullMessagePolicy.BLOCK && maxSize != -1) {
if (sizeInBytes.get() > maxSize) {
OurRunnable ourRunnable = new OurRunnable(runWhenAvailable);
onMemoryFreedRunnables.add(ourRunnable);
// We check again to avoid a race condition where the size can come down just after the
// element
// has been added, but the check to execute was done before the element was added
// NOTE! We do not fix this race by locking the whole thing, doing this check provides
// MUCH better performance in a highly concurrent environment
if (sizeInBytes.get() <= maxSize) {
// run it now
ourRunnable.run();
} else if (!blocking.get()) {
ActiveMQServerLogger.LOGGER.blockingMessageProduction(
address, sizeInBytes.get(), maxSize);
blocking.set(true);
}
return true;
}
} else if (addressFullMessagePolicy == AddressFullMessagePolicy.FAIL && maxSize != -1) {
if (sizeInBytes.get() > maxSize) {
return false;
}
}
runWhenAvailable.run();
return true;
}
/** @param sinceSCN */
@Override
public synchronized void start(long sinceSCN) {
_log.info("Start golden gate evert producer requested.");
if (_currentState == State.RUNNING) {
_log.error("Thread already running! ");
return;
}
_scn.set(TrailFilePositionSetter.USE_LATEST_SCN);
if (sinceSCN > 0) {
_scn.set(sinceSCN);
} else {
if (getMaxScnReaderWriter() != null) {
try {
long scn = getMaxScnReaderWriter().getMaxScn();
// If the max scn is greater than 0, then honor it.
if (scn > 0) {
// apply the restart SCN offset
long newScn =
(scn >= _pConfig.getRestartScnOffset()) ? scn - _pConfig.getRestartScnOffset() : 0;
_log.info(
"Checkpoint read = "
+ scn
+ " restartScnOffset= "
+ _pConfig.getRestartScnOffset()
+ " Adjusted SCN= "
+ newScn);
if (newScn > 0) {
_scn.set(newScn);
}
} else // If the max scn is set to <0, this is a special case that we use to let the trail
// file notifier that you want to override the default behaviour of starting with
// the latest scn.
{
_log.info(
"Overridding default behaviour (start with latest scn), using scn : "
+ scn
+ " to start the relay");
if (scn != TrailFilePositionSetter.USE_EARLIEST_SCN
&& scn != TrailFilePositionSetter.USE_LATEST_SCN)
throw new DatabusException(
"The scn you have passed is neither EARLIEST or LATEST setting, cannot proceed with using this scn");
_scn.set(scn);
}
} catch (DatabusException e) {
_log.warn("Could not read saved maxScn: Defaulting to startSCN=" + _scn.get());
}
}
}
if (_worker == null) {
_log.info("Starting with scn = " + _scn.get());
_worker = new WorkerThread();
_worker.setDaemon(true);
_worker.start();
}
}
/** getAndAdd returns previous value and adds given value */
public void testGetAndAdd() {
AtomicLong ai = new AtomicLong(1);
assertEquals(1, ai.getAndAdd(2));
assertEquals(3, ai.get());
assertEquals(3, ai.getAndAdd(-4));
assertEquals(-1, ai.get());
}
public synchronized PageBufferClientStatus getStatus() {
String state;
if (closed) {
state = "closed";
} else if (future != null) {
state = "running";
} else if (scheduled) {
state = "scheduled";
} else if (completed) {
state = "completed";
} else {
state = "queued";
}
String httpRequestState = "not scheduled";
if (future != null) {
httpRequestState = future.getState();
}
long rejectedRows = rowsRejected.get();
int rejectedPages = pagesRejected.get();
return new PageBufferClientStatus(
location,
state,
lastUpdate,
rowsReceived.get(),
pagesReceived.get(),
rejectedRows == 0 ? OptionalLong.empty() : OptionalLong.of(rejectedRows),
rejectedPages == 0 ? OptionalInt.empty() : OptionalInt.of(rejectedPages),
requestsScheduled.get(),
requestsCompleted.get(),
requestsFailed.get(),
httpRequestState);
}
@Override
@Test(timeout = 30000)
public void testMessageSizeOneDurable() throws Exception {
AtomicLong publishedMessageSize = new AtomicLong();
Connection connection = new ActiveMQConnectionFactory(brokerConnectURI).createConnection();
connection.setClientID("clientId");
connection.start();
SubscriptionKey subKey = new SubscriptionKey("clientId", "sub1");
org.apache.activemq.broker.region.Topic dest =
publishTestMessagesDurable(
connection, new String[] {"sub1"}, 200, publishedMessageSize, DeliveryMode.PERSISTENT);
verifyPendingStats(dest, subKey, 200, publishedMessageSize.get());
// The expected value is only 100 because for durables a LRUCache is being used
// with a max size of 100
verifyStoreStats(dest, 100, publishedMessageSize.get());
// consume 100 messages
consumeDurableTestMessages(connection, "sub1", 100, publishedMessageSize);
// 100 should be left
verifyPendingStats(dest, subKey, 100, publishedMessageSize.get());
verifyStoreStats(dest, 100, publishedMessageSize.get());
connection.close();
}
@Override
@Test(timeout = 30000)
public void testMessageSizeTwoDurables() throws Exception {
AtomicLong publishedMessageSize = new AtomicLong();
Connection connection = new ActiveMQConnectionFactory(brokerConnectURI).createConnection();
connection.setClientID("clientId");
connection.start();
org.apache.activemq.broker.region.Topic dest =
publishTestMessagesDurable(
connection,
new String[] {"sub1", "sub2"},
200,
publishedMessageSize,
DeliveryMode.PERSISTENT);
// verify the count and size
SubscriptionKey subKey = new SubscriptionKey("clientId", "sub1");
verifyPendingStats(dest, subKey, 200, publishedMessageSize.get());
// consume messages just for sub1
consumeDurableTestMessages(connection, "sub1", 200, publishedMessageSize);
// There is still a durable that hasn't consumed so the messages should exist
SubscriptionKey subKey2 = new SubscriptionKey("clientId", "sub2");
verifyPendingStats(dest, subKey, 0, 0);
verifyPendingStats(dest, subKey2, 200, publishedMessageSize.get());
// The expected value is only 100 because for durables a LRUCache is being used
// with a max size of 100
verifyStoreStats(dest, 100, publishedMessageSize.get());
connection.stop();
}
/** Return the probe's next 2-sigma */
public final double sampleSigma(int n) {
synchronized (_lock) {
long count = _count.get();
long lastCount = _lastStdCount;
_lastStdCount = count;
double sum = _sum.get();
double lastSum = _lastStdSum;
_lastStdSum = sum;
double sumSquare = _sumSquare;
_sumSquare = 0;
if (count == lastCount) return 0;
double avg = (sum - lastSum) / (count - lastCount);
double part = (count - lastCount) * sumSquare - sum * sum;
if (part < 0) part = 0;
double std = Math.sqrt(part) / (count - lastCount);
return _scale * (avg + n * std);
}
}
/**
* Tests Functional#reduce with the summation reduction; we traverse all keys (in each direction)
* to make sure the sum and count are correct and keys and values match up.
*/
public void testSummationReduction() throws Exception {
final AtomicLong counter = new AtomicLong();
final Exchange exchange = getExchange(db, true);
Reduction<String, Integer, Integer> summation =
new Reduction<String, Integer, Integer>() {
@Override
public Integer reduce(Pair<String, Integer> row, Integer accum) {
Assert.assertEquals(row.getKey(), getKey(row.getValue()));
counter.getAndIncrement();
return accum + row.getValue();
}
};
int ascendingSum = Functional.reduce(exchange, getFullTraversal(Direction.ASC), summation, 0);
Assert.assertEquals(ascendingSum, 499500);
Assert.assertEquals(counter.get(), 1000);
counter.set(0);
int descendingSum = Functional.reduce(exchange, getFullTraversal(Direction.DESC), summation, 0);
Assert.assertEquals(descendingSum, 499500);
Assert.assertEquals(counter.get(), 1000);
}
/**
* This tracks block hit and misses against the cache for this Directory only
*
* @param isHit true if recording a hit otherwise it's a miss
*/
public void recordBlockCacheHit(boolean isHit) {
if (isHit) {
long hits = hitCounter.incrementAndGet();
if (isHitRateLoggingEnabled() && hits % 5000 == 0) {
long misses = missCounter.get();
double hr = MTLRUCache.calculateHitRate(hits, misses);
int hrRounded = (int) (hr * 100);
boolean showHR = false;
// if its poor, show frequently
if (hr < 0.5) showHR = true;
else
// otherwise, show infrequently
if (hits % 20000 == 0) showHR = true;
if (showHR) {
int compRate = 0;
if (unCompressedTotal.get() != 0) {
compRate =
(int) (100.0 * (double) compressedTotal.get() / (double) unCompressedTotal.get());
}
logger.log(
Level.INFO,
"Hit rate for "
+ directoryName
+ " Directory is "
+ hrRounded
+ "%, total reads "
+ (hits + misses)
+ ", Compress Rate:"
+ compRate
+ "%");
}
}
} else missCounter.incrementAndGet();
}
@Test
public void testFunctions() {
final AtomicLong lf = new AtomicLong(10L);
Assert.assertEquals(Anoa.of(10L), handler.function(lf::getAndAdd).apply(handler.of(1L)));
Assert.assertEquals(11L, lf.get());
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.functionChecked(
__ -> {
throw new IOException();
})
.apply(handler.of(1L)));
final AtomicLong lf2 = new AtomicLong(10L);
Assert.assertEquals(
Anoa.of(10L),
handler.biFunction((Long x, Long y) -> lf2.getAndAdd(x + y)).apply(Anoa.of(1L), 1L));
Assert.assertEquals(12L, lf2.get());
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.biFunctionChecked(
(_1, _2) -> {
throw new IOException();
})
.apply(Anoa.of(1L), 1L));
}
@Test
public void testConsumers() {
final AtomicLong lc = new AtomicLong(0L);
Assert.assertEquals(Anoa.of(1L), handler.consumer(lc::addAndGet).apply(handler.of(1L)));
Assert.assertEquals(1L, lc.get());
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.consumerChecked(
__ -> {
throw new IOException();
})
.apply(handler.of(1L)));
final AtomicLong lc2 = new AtomicLong(0L);
Assert.assertEquals(
Anoa.of(1L),
handler.biConsumer((Long x, Long y) -> lc2.addAndGet(x + y)).apply(Anoa.of(1L), 1L));
Assert.assertEquals(2L, lc2.get());
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.biConsumerChecked(
(_1, _2) -> {
throw new IOException();
})
.apply(Anoa.of(1L), 1L));
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
String uri = getDecodedUri(request);
try {
Pattern p = Pattern.compile(".*/NodePersistentStorage.bin/([^/]+)/([^/]+)");
Matcher m = p.matcher(uri);
boolean b = m.matches();
if (!b) {
setResponseStatus(response, HttpServletResponse.SC_BAD_REQUEST);
response.getWriter().write("Improperly formatted URI");
return;
}
String categoryName = m.group(1);
String keyName = m.group(2);
NodePersistentStorage nps = H2O.getNPS();
AtomicLong length = new AtomicLong();
InputStream is = nps.get(categoryName, keyName, length);
if (length.get() > (long) Integer.MAX_VALUE) {
throw new Exception("NPS value size exceeds Integer.MAX_VALUE");
}
response.setContentType("application/octet-stream");
response.setContentLength((int) length.get());
response.addHeader("Content-Disposition", "attachment; filename=" + keyName + ".flow");
setResponseStatus(response, HttpServletResponse.SC_OK);
OutputStream os = response.getOutputStream();
water.util.FileUtils.copyStream(is, os, 2048);
} catch (Exception e) {
sendErrorResponse(response, e, uri);
} finally {
logRequest("GET", request, response);
}
}
@Override
public void preGetOp(
final ObserverContext<RegionCoprocessorEnvironment> e,
final Get get,
final List<Cell> results)
throws IOException {
if (e.getEnvironment().getRegion().getRegionInfo().getReplicaId() == 0) {
CountDownLatch latch = cdl.get();
try {
if (sleepTime.get() > 0) {
LOG.info("Sleeping for " + sleepTime.get() + " ms");
Thread.sleep(sleepTime.get());
} else if (latch.getCount() > 0) {
LOG.info("Waiting for the counterCountDownLatch");
latch.await(2, TimeUnit.MINUTES); // To help the tests to finish.
if (latch.getCount() > 0) {
throw new RuntimeException("Can't wait more");
}
}
} catch (InterruptedException e1) {
LOG.error(e1);
}
} else {
LOG.info("We're not the primary replicas.");
}
}
private boolean partititionChanged(long partition) {
if (currentPartition.get() != partition) {
LOG.info("Partition changed from {} to {}", currentPartition.get(), partition);
currentPartition.set(partition);
return true;
}
return false;
}
/** repeated weakCompareAndSet succeeds in changing value when equal to expected */
public void testWeakCompareAndSet() {
AtomicLong ai = new AtomicLong(1);
while (!ai.weakCompareAndSet(1, 2)) ;
while (!ai.weakCompareAndSet(2, -4)) ;
assertEquals(-4, ai.get());
while (!ai.weakCompareAndSet(-4, 7)) ;
assertEquals(7, ai.get());
}
private void prepareNextLogFile() {
appendLSN.addAndGet(logFileSize - getLogFileOffset(appendLSN.get()));
appendChannel = getFileChannel(appendLSN.get(), true);
appendPage.isLastPage(true);
// [Notice]
// the current log file channel is closed if
// LogBuffer.flush() completely flush the last page of the file.
}
/** get returns the last value set */
public void testGetSet() {
AtomicLong ai = new AtomicLong(1);
assertEquals(1, ai.get());
ai.set(2);
assertEquals(2, ai.get());
ai.set(-3);
assertEquals(-3, ai.get());
}