public void readCompleted(DiskManagerReadRequest request, DirectByteBuffer data) {
try {
lock_mon.enter();
if (!loading_messages.contains(request) || destroyed) { // was canceled
data.returnToPool();
return;
}
loading_messages.remove(request);
BTPiece msg =
new BTPiece(request.getPieceNumber(), request.getOffset(), data, piece_version);
queued_messages.put(msg, request);
outgoing_message_queue.addMessage(msg, true);
} finally {
lock_mon.exit();
}
outgoing_message_queue.doListenerNotifications();
}
private int postReadProcess() throws IOException {
int prot_bytes_read = 0;
int data_bytes_read = 0;
if (!reading_length_mode && !destroyed) { // reading payload data mode
// ensure-restore proper buffer limits
payload_buffer.limit(SS, message_length);
length_buffer.limit(SS, 4);
int read = payload_buffer.position(SS) - pre_read_start_position;
if (payload_buffer.position(SS) > 0) { // need to have read the message id first byte
if (BTMessageFactory.getMessageType(payload_buffer) == Message.TYPE_DATA_PAYLOAD) {
data_bytes_read += read;
} else {
prot_bytes_read += read;
}
}
if (!payload_buffer.hasRemaining(SS) && !is_paused) { // full message received!
payload_buffer.position(SS, 0);
DirectByteBuffer ref_buff = payload_buffer;
payload_buffer = null;
if (reading_handshake_message) { // decode handshake
reading_handshake_message = false;
DirectByteBuffer handshake_data =
DirectByteBufferPool.getBuffer(DirectByteBuffer.AL_MSG_BT_HAND, 68);
handshake_data.putInt(SS, HANDSHAKE_FAKE_LENGTH);
handshake_data.put(SS, ref_buff);
handshake_data.flip(SS);
ref_buff.returnToPool();
try {
Message handshake =
MessageManager.getSingleton()
.createMessage(BTMessage.ID_BT_HANDSHAKE_BYTES, handshake_data, (byte) 1);
messages_last_read.add(handshake);
} catch (MessageException me) {
handshake_data.returnToPool();
throw new IOException("BT message decode failed: " + me.getMessage());
}
// we need to auto-pause decoding until we're told to start again externally,
// as we don't want to accidentally read the next message on the stream if it's an
// AZ-format handshake
pauseDecoding();
} else { // decode normal message
try {
messages_last_read.add(createMessage(ref_buff));
} catch (Throwable e) {
ref_buff.returnToPoolIfNotFree();
// maintain unexpected errors as such so they get logged later
if (e instanceof RuntimeException) {
throw ((RuntimeException) e);
}
throw new IOException("BT message decode failed: " + e.getMessage());
}
}
reading_length_mode = true; // see if we've already read the next message's length
percent_complete = -1; // reset receive percentage
} else { // only partial received so far
percent_complete =
(payload_buffer.position(SS) * 100) / message_length; // compute receive percentage
}
}
if (reading_length_mode && !destroyed) {
length_buffer.limit(SS, 4); // ensure proper buffer limit
prot_bytes_read +=
(pre_read_start_buffer == 1)
? length_buffer.position(SS) - pre_read_start_position
: length_buffer.position(SS);
if (!length_buffer.hasRemaining(SS)) { // done reading the length
reading_length_mode = false;
length_buffer.position(SS, 0);
message_length = length_buffer.getInt(SS);
length_buffer.position(SS, 0); // reset it for next length read
if (message_length == HANDSHAKE_FAKE_LENGTH) { // handshake message
reading_handshake_message = true;
message_length = 64; // restore 'real' length
payload_buffer =
DirectByteBufferPool.getBuffer(DirectByteBuffer.AL_MSG_BT_HAND, message_length);
} else if (message_length == 0) { // keep-alive message
reading_length_mode = true;
last_received_was_keepalive = true;
try {
Message keep_alive =
MessageManager.getSingleton()
.createMessage(BTMessage.ID_BT_KEEP_ALIVE_BYTES, null, (byte) 1);
messages_last_read.add(keep_alive);
} catch (MessageException me) {
throw new IOException("BT message decode failed: " + me.getMessage());
}
} else if (message_length < MIN_MESSAGE_LENGTH || message_length > MAX_MESSAGE_LENGTH) {
throw new IOException(
"Invalid message length given for BT message decode: " + message_length);
} else { // normal message
payload_buffer =
DirectByteBufferPool.getBuffer(DirectByteBuffer.AL_MSG_BT_PAYLOAD, message_length);
}
}
}
protocol_bytes_last_read += prot_bytes_read;
data_bytes_last_read += data_bytes_read;
return prot_bytes_read + data_bytes_read;
}
public ByteBuffer destroy() {
if (destroyed) {
Debug.out("Trying to redestroy message decoder, stack trace follows: " + this);
Debug.outStackTrace();
}
is_paused = true;
destroyed = true;
// there's a concurrency issue with the decoder whereby it can be destroyed while will being
// messed with. Don't
// have the energy to look into it properly atm so just try to ensure that it doesn't bork too
// badly (parg: 29/04/2012)
// only occasional but does have potential to generate direct buffer mem leak ;(
int lbuff_read = 0;
int pbuff_read = 0;
length_buffer.limit(SS, 4);
DirectByteBuffer plb = payload_buffer;
if (reading_length_mode) {
lbuff_read = length_buffer.position(SS);
} else { // reading payload
length_buffer.position(SS, 4);
lbuff_read = 4;
pbuff_read = plb == null ? 0 : plb.position(SS);
}
ByteBuffer unused = ByteBuffer.allocate(lbuff_read + pbuff_read); // TODO convert to direct?
length_buffer.flip(SS);
unused.put(length_buffer.getBuffer(SS));
try {
if (plb != null) {
plb.flip(SS);
unused.put(
plb.getBuffer(
SS)); // Got a buffer overflow exception here in the past - related to PEX?
}
} catch (RuntimeException e) {
Debug.out("hit known threading issue");
}
unused.flip();
length_buffer.returnToPool();
if (plb != null) {
plb.returnToPool();
payload_buffer = null;
}
try {
for (int i = 0; i < messages_last_read.size(); i++) {
Message msg = (Message) messages_last_read.get(i);
msg.destroy();
}
} catch (RuntimeException e) {
// happens if messages modified by alt thread...
Debug.out("hit known threading issue");
}
messages_last_read.clear();
return unused;
}
@Override
public void destroy() {
if (buffer != null) {
buffer.returnToPool();
}
}
protected void convert(int target_type) throws FMFileManagerException {
if (type == target_type) {
return;
}
if (type == FMFile.FT_PIECE_REORDER || target_type == FMFile.FT_PIECE_REORDER) {
if (target_type == FMFile.FT_PIECE_REORDER_COMPACT
|| type == FMFile.FT_PIECE_REORDER_COMPACT) {
// these two access modes are in fact identical at the moment
type = target_type;
return;
}
throw (new FMFileManagerException("Conversion to/from piece-reorder not supported"));
}
File file = owner.getLinkedFile();
RandomAccessFile raf = null;
boolean ok = false;
try {
FMFileAccess target_access;
if (target_type == FMFile.FT_LINEAR) {
target_access = new FMFileAccessLinear(owner);
} else {
target_access =
new FMFileAccessCompact(
owner.getOwner().getTorrentFile(),
control_dir,
controlFileName,
new FMFileAccessLinear(owner));
}
if (file.exists()) {
raf = new RandomAccessFile(file, FMFileImpl.WRITE_ACCESS_MODE);
// due to the simplistic implementation of compact we only actually need to deal with
// the last piece of the file (first piece is in the right place already)
FMFileAccessCompact compact_access;
if (target_type == FMFile.FT_LINEAR) {
compact_access = (FMFileAccessCompact) file_access;
} else {
compact_access = (FMFileAccessCompact) target_access;
}
long length = file_access.getLength(raf);
long last_piece_start = compact_access.getLastPieceStart();
long last_piece_length = compact_access.getLastPieceLength();
// see if we have any potential data for the last piece
if (last_piece_length > 0 && length > last_piece_start) {
long data_length = length - last_piece_start;
if (data_length > last_piece_length) {
Debug.out(
"data length inconsistent: len=" + data_length + ",limit=" + last_piece_length);
data_length = last_piece_length;
}
DirectByteBuffer buffer =
DirectByteBufferPool.getBuffer(DirectByteBuffer.AL_FILE, (int) data_length);
try {
file_access.read(raf, new DirectByteBuffer[] {buffer}, last_piece_start);
// see if we need to truncate
if (target_type == FMFile.FT_COMPACT) {
long first_piece_length = compact_access.getFirstPieceLength();
long physical_length = raf.length();
if (physical_length > first_piece_length) {
raf.setLength(first_piece_length);
}
}
buffer.flip(DirectByteBuffer.AL_FILE);
target_access.write(raf, new DirectByteBuffer[] {buffer}, last_piece_start);
} finally {
buffer.returnToPool();
}
} else {
// no last piece, truncate after the first piece
if (target_type == FMFile.FT_COMPACT) {
long first_piece_length = compact_access.getFirstPieceLength();
long physical_length = raf.length();
if (physical_length > first_piece_length) {
raf.setLength(first_piece_length);
}
}
}
target_access.setLength(raf, length);
target_access.flush();
}
type = target_type;
file_access = target_access;
ok = true;
} catch (Throwable e) {
Debug.printStackTrace(e);
throw (new FMFileManagerException("convert fails", e));
} finally {
try {
if (raf != null) {
try {
raf.close();
} catch (Throwable e) {
// override original exception if there isn't one
if (ok) {
ok = false;
throw (new FMFileManagerException("convert fails", e));
}
}
}
} finally {
if (!ok) {
// conversion failed - replace with linear access, caller is responsible for
// handling this (marking file requiring recheck)
type = FMFile.FT_LINEAR;
file_access = new FMFileAccessLinear(owner);
}
if (type == FMFile.FT_LINEAR) {
new File(control_dir, controlFileName).delete();
}
}
}
}
