/**
* @param bytebuffer ByteBuffer
* @param flip boolean
* @return int
* @throws IOException TODO Fix non blocking write properly
*/
private synchronized int writeToSocket(ByteBuffer bytebuffer, boolean block, boolean flip)
throws IOException {
if (flip) bytebuffer.flip();
int written = 0;
NioEndpoint.KeyAttachment att = (NioEndpoint.KeyAttachment) socket.getAttachment(false);
if (att == null) throw new IOException("Key must be cancelled");
long writeTimeout = att.getTimeout();
Selector selector = null;
try {
selector = pool.get();
} catch (IOException x) {
// ignore
}
try {
written = pool.write(bytebuffer, socket, selector, writeTimeout, block, lastWrite);
// make sure we are flushed
do {
if (socket.flush(true, selector, writeTimeout, lastWrite)) break;
} while (true);
} finally {
if (selector != null) pool.put(selector);
}
if (block) bytebuffer.clear(); // only clear
return written;
}
/**
* Read a sequence of bytes in non-blocking mode from he current channel
*
* @param bb the byte buffer which will contain the bytes read from the current channel
*/
private void nonBlockingRead(final ByteBuffer bb, long timeout, TimeUnit unit) {
final NioChannel ch = this.channel;
try {
ch.read(bb, ch, this.completionHandler);
} catch (Throwable t) {
if (log.isDebugEnabled()) {
log.debug("An error occurs when trying a non-blocking read ", t);
}
}
}
/** Send an acknowledgment. */
@Override
public void sendAck() throws IOException {
if (!committed) {
// Socket.send(socket, Constants.ACK_BYTES, 0, Constants.ACK_BYTES.length) < 0
socket
.getBufHandler()
.getWriteBuffer()
.put(Constants.ACK_BYTES, 0, Constants.ACK_BYTES.length);
writeToSocket(socket.getBufHandler().getWriteBuffer(), true, true);
}
}
/** Callback to write data from the buffer. */
private void flushBuffer() throws IOException {
// prevent timeout for async,
SelectionKey key = socket.getIOChannel().keyFor(socket.getPoller().getSelector());
if (key != null) {
NioEndpoint.KeyAttachment attach = (NioEndpoint.KeyAttachment) key.attachment();
attach.access();
}
// write to the socket, if there is anything to write
if (socket.getBufHandler().getWriteBuffer().position() > 0) {
socket.getBufHandler().getWriteBuffer().flip();
writeToSocket(socket.getBufHandler().getWriteBuffer(), true, false);
}
}
/** Recycle the output buffer. This should be called when closing the connection. */
@Override
public void recycle() {
super.recycle();
if (socket != null) {
socket.getBufHandler().getWriteBuffer().clear();
socket = null;
}
lastWrite.set(1);
}
private synchronized void addToBB(byte[] buf, int offset, int length) throws IOException {
while (length > 0) {
int thisTime = length;
if (socket.getBufHandler().getWriteBuffer().position()
== socket.getBufHandler().getWriteBuffer().capacity()
|| socket.getBufHandler().getWriteBuffer().remaining() == 0) {
flushBuffer();
}
if (thisTime > socket.getBufHandler().getWriteBuffer().remaining()) {
thisTime = socket.getBufHandler().getWriteBuffer().remaining();
}
socket.getBufHandler().getWriteBuffer().put(buf, offset, thisTime);
length = length - thisTime;
offset = offset + thisTime;
}
NioEndpoint.KeyAttachment ka = (NioEndpoint.KeyAttachment) socket.getAttachment(false);
if (ka != null) ka.access(); // prevent timeouts for just doing client writes
}
