public synchronized void write(final PagedMessage message) throws Exception {
if (!file.isOpen()) {
return;
}
ByteBuffer buffer = fileFactory.newBuffer(message.getEncodeSize() + Page.SIZE_RECORD);
HornetQBuffer wrap = HornetQBuffers.wrappedBuffer(buffer);
wrap.clear();
wrap.writeByte(Page.START_BYTE);
wrap.writeInt(0);
int startIndex = wrap.writerIndex();
message.encode(wrap);
int endIndex = wrap.writerIndex();
wrap.setInt(1, endIndex - startIndex); // The encoded length
wrap.writeByte(Page.END_BYTE);
buffer.rewind();
file.writeDirect(buffer, false);
if (pageCache != null) {
pageCache.addLiveMessage(message);
}
numberOfMessages.incrementAndGet();
size.addAndGet(buffer.limit());
storageManager.pageWrite(message, pageId);
}
public boolean delete(final PagedMessage[] messages) throws Exception {
if (storageManager != null) {
storageManager.pageDeleted(storeName, pageId);
}
if (isDebug) {
HornetQServerLogger.LOGGER.debug("Deleting pageId=" + pageId + " on store " + storeName);
}
if (messages != null) {
for (PagedMessage msg : messages) {
if (msg.getMessage().isLargeMessage()) {
LargeServerMessage lmsg = (LargeServerMessage) msg.getMessage();
// Remember, cannot call delete directly here
// Because the large-message may be linked to another message
// or it may still being delivered even though it has been acked already
lmsg.decrementDelayDeletionCount();
}
}
}
try {
if (suspiciousRecords) {
HornetQServerLogger.LOGGER.pageInvalid(file.getFileName(), file.getFileName());
file.renameTo(file.getFileName() + ".invalidPage");
} else {
file.delete();
}
return true;
} catch (Exception e) {
HornetQServerLogger.LOGGER.pageDeleteError(e);
return false;
}
}
public synchronized List<PagedMessage> read(StorageManager storage) throws Exception {
if (isDebug) {
HornetQServerLogger.LOGGER.debug(
"reading page " + this.pageId + " on address = " + storeName);
}
if (!file.isOpen()) {
throw HornetQMessageBundle.BUNDLE.invalidPageIO();
}
ArrayList<PagedMessage> messages = new ArrayList<PagedMessage>();
size.set((int) file.size());
// Using direct buffer, as described on https://jira.jboss.org/browse/HORNETQ-467
ByteBuffer directBuffer = storage.allocateDirectBuffer((int) file.size());
try {
file.position(0);
file.read(directBuffer);
directBuffer.rewind();
HornetQBuffer fileBuffer = HornetQBuffers.wrappedBuffer(directBuffer);
fileBuffer.writerIndex(fileBuffer.capacity());
while (fileBuffer.readable()) {
final int position = fileBuffer.readerIndex();
byte byteRead = fileBuffer.readByte();
if (byteRead == Page.START_BYTE) {
if (fileBuffer.readerIndex() + DataConstants.SIZE_INT < fileBuffer.capacity()) {
int messageSize = fileBuffer.readInt();
int oldPos = fileBuffer.readerIndex();
if (fileBuffer.readerIndex() + messageSize < fileBuffer.capacity()
&& fileBuffer.getByte(oldPos + messageSize) == Page.END_BYTE) {
PagedMessage msg = new PagedMessageImpl();
msg.decode(fileBuffer);
byte b = fileBuffer.readByte();
if (b != Page.END_BYTE) {
// Sanity Check: This would only happen if there is a bug on decode or any internal
// code, as
// this
// constraint was already checked
throw new IllegalStateException(
"Internal error, it wasn't possible to locate END_BYTE " + b);
}
msg.initMessage(storage);
if (isTrace) {
HornetQServerLogger.LOGGER.trace(
"Reading message "
+ msg
+ " on pageId="
+ this.pageId
+ " for address="
+ storeName);
}
messages.add(msg);
} else {
markFileAsSuspect(file.getFileName(), position, messages.size());
break;
}
}
} else {
markFileAsSuspect(file.getFileName(), position, messages.size());
break;
}
}
} finally {
storage.freeDirectBuffer(directBuffer);
}
numberOfMessages.set(messages.size());
return messages;
}
