public E get(long index) {
RandomAccessFile randomSerializeIndexFile = null;
RandomAccessFile randomSerializeFile = null;
E result = null;
Lock lock = readWriteLock.readLock();
lock.lock();
Throwable throwable = null;
long elementsCount = 0;
try {
if (!dataFile.canRead() || !indexFile.canRead()) {
return null;
}
randomSerializeIndexFile = new RandomAccessFile(indexFile, "r");
randomSerializeFile = new RandomAccessFile(dataFile, "r");
elementsCount = internalGetSize(randomSerializeIndexFile);
if (index >= 0 && index < elementsCount) {
long offset = internalOffsetOfElement(randomSerializeIndexFile, index);
result = internalReadElement(randomSerializeFile, offset);
return result;
}
} catch (Throwable e) {
throwable = e;
} finally {
IOUtilities.closeQuietly(randomSerializeFile);
IOUtilities.closeQuietly(randomSerializeIndexFile);
lock.unlock();
}
// it's a really bad idea to log while locked *sigh*
if (throwable != null) {
if (throwable instanceof ClassNotFoundException
|| throwable instanceof InvalidClassException) {
if (logger.isWarnEnabled())
logger.warn("Couldn't deserialize object at index " + index + "!\n" + throwable);
} else if (throwable instanceof ClassCastException) {
if (logger.isWarnEnabled())
logger.warn("Couldn't cast deserialized object at index " + index + "!\n" + throwable);
} else {
if (logger.isWarnEnabled())
logger.warn("Couldn't retrieve element at index " + index + "!", throwable);
}
IOUtilities.interruptIfNecessary(throwable);
} else if (index < 0 || index >= elementsCount) {
if (logger.isInfoEnabled()) {
logger.info(
"index ("
+ index
+ ") must be in the range [0..<"
+ elementsCount
+ "]. Returning null.");
}
return null;
}
return result;
}
public long getSize() {
RandomAccessFile raf = null;
Throwable throwable;
Lock lock = readWriteLock.readLock();
lock.lock(); // FindBugs "Multithreaded correctness - Method does not release lock on all
// exception paths" is a false positive
try {
if (!indexFile.canRead()) {
return 0;
}
raf = new RandomAccessFile(indexFile, "r");
return internalGetSize(raf);
} catch (Throwable e) {
throwable = e;
} finally {
IOUtilities.closeQuietly(raf);
lock.unlock();
}
// it's a really bad idea to log while locked *sigh*
if (throwable != null) {
if (logger.isDebugEnabled()) logger.debug("Couldn't retrieve size!", throwable);
IOUtilities.interruptIfNecessary(throwable);
}
return 0;
}
public void add(E element) {
RandomAccessFile randomSerializeIndexFile = null;
RandomAccessFile randomSerializeFile = null;
Throwable throwable = null;
Lock lock = readWriteLock.writeLock();
lock.lock(); // FindBugs "Multithreaded correctness - Method does not release lock on all
// exception paths" is a false positive
try {
randomSerializeIndexFile = new RandomAccessFile(indexFile, "rw");
randomSerializeFile = new RandomAccessFile(dataFile, "rw");
long elementsCount = internalGetSize(randomSerializeIndexFile);
long offset = 0;
if (elementsCount > 0) {
long prevElement = elementsCount - 1;
offset = internalOffsetOfElement(randomSerializeIndexFile, prevElement);
offset = offset + internalReadElementSize(randomSerializeFile, offset) + 4;
}
internalWriteElement(randomSerializeFile, offset, element);
internalWriteOffset(randomSerializeIndexFile, elementsCount, offset);
} catch (IOException e) {
throwable = e;
} finally {
IOUtilities.closeQuietly(randomSerializeFile);
IOUtilities.closeQuietly(randomSerializeIndexFile);
lock.unlock();
}
if (throwable != null) {
// it's a really bad idea to log while locked *sigh*
if (logger.isWarnEnabled()) logger.warn("Couldn't write element!", throwable);
IOUtilities.interruptIfNecessary(throwable);
}
}
public void addAll(List<E> elements) {
if (elements != null) {
int newElementCount = elements.size();
if (newElementCount > 0) {
RandomAccessFile randomSerializeIndexFile = null;
RandomAccessFile randomSerializeFile = null;
Throwable throwable = null;
Lock lock = readWriteLock.writeLock();
lock.lock(); // FindBugs "Multithreaded correctness - Method does not release lock on all
// exception paths" is a false positive
try {
randomSerializeIndexFile = new RandomAccessFile(indexFile, "rw");
randomSerializeFile = new RandomAccessFile(dataFile, "rw");
long elementsCount = internalGetSize(randomSerializeIndexFile);
long offset = 0;
if (elementsCount > 0) {
long prevElement = elementsCount - 1;
offset = internalOffsetOfElement(randomSerializeIndexFile, prevElement);
offset = offset + internalReadElementSize(randomSerializeFile, offset) + 4;
}
long[] offsets = new long[elements.size()];
int index = 0;
for (E element : elements) {
offsets[index] = offset;
offset = offset + internalWriteElement(randomSerializeFile, offset, element) + 4;
index++;
}
index = 0;
for (long curOffset : offsets) {
internalWriteOffset(randomSerializeIndexFile, elementsCount + index, curOffset);
index++;
}
// if(logger.isInfoEnabled()) logger.info("Elements after batch-write: {}",
// index+elementsCount);
} catch (Throwable e) {
throwable = e;
} finally {
IOUtilities.closeQuietly(randomSerializeFile);
IOUtilities.closeQuietly(randomSerializeIndexFile);
lock.unlock();
}
if (throwable != null) {
// it's a really bad idea to log while locked *sigh*
if (logger.isWarnEnabled()) logger.warn("Couldn't write element!", throwable);
IOUtilities.interruptIfNecessary(throwable);
}
}
}
}
public void run() {
try {
ArrayList<Byte> bytes = new ArrayList<>();
for (; ; ) {
for (; ; ) {
int readByte = inputStream.read();
if (readByte == -1) {
if (logger.isInfoEnabled()) logger.info("Read -1!!");
return;
}
byte current = (byte) readByte;
if (current == 0) {
break;
}
bytes.add(current);
}
if (bytes.size() > 0) {
byte[] ba = new byte[bytes.size()];
for (int i = 0; i < bytes.size(); i++) {
ba[i] = bytes.get(i);
}
bytes.clear();
String str = new String(ba, StandardCharsets.UTF_8);
if (logger.isDebugEnabled()) logger.debug("Read: {}", str);
StringReader strr = new StringReader(str);
XMLStreamReader reader = XML_INPUT_FACTORY.createXMLStreamReader(strr);
LoggingEvent event = loggingEventReader.read(reader);
addEvent(event);
} else {
if (logger.isDebugEnabled()) logger.debug("bytes.size()==0!!");
}
}
} catch (Throwable e) {
if (logger.isDebugEnabled())
logger.debug(
"Exception ({}: '{}') while reading events. Adding eventWrapper with empty event and stopping...",
e.getClass().getName(),
e.getMessage(),
e);
addEvent(null);
IOUtilities.interruptIfNecessary(e);
} finally {
close();
}
}
private void fireTableChanged(TableModelEvent event) {
Object[] listeners;
synchronized (eventListenerList) {
listeners = eventListenerList.getListenerList();
}
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length - 2; i >= 0; i -= 2) {
if (listeners[i] == TableModelListener.class) {
TableModelListener listener = ((TableModelListener) listeners[i + 1]);
if (logger.isDebugEnabled()) {
logger.debug("Firing TableChange at {}.", listener.getClass().getName());
}
try {
listener.tableChanged(event);
} catch (Throwable ex) {
if (logger.isWarnEnabled()) logger.warn("Exception while firing change!", ex);
IOUtilities.interruptIfNecessary(ex);
}
}
}
}