在NioWorker的read(SelectionKey k)方法中
if (readBytes > 0) {
bb.flip();
final ChannelBufferFactory bufferFactory =
channel.getConfig().getBufferFactory();
final ChannelBuffer buffer = bufferFactory.getBuffer(readBytes);
buffer.setBytes(0, bb);
buffer.writerIndex(readBytes);
recvBufferPool.release(bb);
// Update the predictor.
predictor.previousReceiveBufferSize(readBytes);
// Fire the event.
fireMessageReceived(channel, buffer);
} else {
recvBufferPool.release(bb);
}
if (ret < 0 || failure) {
k.cancel(); // Some JDK implementations run into an infinite loop without this.
close(channel, succeededFuture(channel));
return false;
}