public void RampUpBeforeReadCompleteWhenLargeDataPending()
{
// Simulate that there is always more data when we attempt to read so we should always ramp up.
AllocReadExpected(_handle, _alloc, 512);
AllocReadExpected(_handle, _alloc, 8192);
AllocReadExpected(_handle, _alloc, 131072);
AllocReadExpected(_handle, _alloc, 2097152);
_handle.ReadComplete();
_handle.Reset(_config.Object);
AllocReadExpected(_handle, _alloc, 8388608);
}
protected override async void DoBeginRead()
{
IByteBuffer byteBuffer = null;
IRecvByteBufAllocatorHandle allocHandle = null;
try
{
if (!this.Open || this.ReadPending)
{
return;
}
this.ReadPending = true;
IByteBufferAllocator allocator = this.Configuration.Allocator;
allocHandle = this.Configuration.RecvByteBufAllocator.NewHandle();
allocHandle.Reset(this.Configuration);
do
{
byteBuffer = allocHandle.Allocate(allocator);
var data = new byte[byteBuffer.Capacity];
IBuffer buffer = data.AsBuffer();
IBuffer completion = await this.streamSocket.InputStream.ReadAsync(buffer, (uint)byteBuffer.WritableBytes, InputStreamOptions.Partial);
allocHandle.LastBytesRead = (int)completion.Length;
if (allocHandle.LastBytesRead > 0)
{
byteBuffer.WriteBytes(data, 0, (int)completion.Length);
}
else
{
// nothing was read -> release the buffer.
byteBuffer.Release();
byteBuffer = null;
break;
}
this.Pipeline.FireChannelRead(byteBuffer);
allocHandle.IncMessagesRead(1);
}while (allocHandle.ContinueReading());
allocHandle.ReadComplete();
this.ReadPending = false;
this.Pipeline.FireChannelReadComplete();
}
catch (Exception e)
{
// Since this method returns void, all exceptions must be handled here.
byteBuffer?.Release();
allocHandle?.ReadComplete();
this.ReadPending = false;
this.Pipeline.FireChannelReadComplete();
this.Pipeline.FireExceptionCaught(e);
if (this.Active)
{
await this.CloseAsync();
}
}
}
protected override async void DoBeginRead()
{
IByteBuffer byteBuffer = null;
IRecvByteBufAllocatorHandle allocHandle = null;
bool close = false;
try
{
if (!Open || ReadPending)
{
return;
}
ReadPending = true;
IByteBufferAllocator allocator = Configuration.Allocator;
allocHandle = Configuration.RecvByteBufAllocator.NewHandle();
allocHandle.Reset(Configuration);
do
{
byteBuffer = allocHandle.Allocate(allocator);
allocHandle.LastBytesRead = await DoReadBytes(byteBuffer).ConfigureAwait(false);
if (allocHandle.LastBytesRead <= 0)
{
// nothing was read -> release the buffer.
byteBuffer.Release();
byteBuffer = null;
close = allocHandle.LastBytesRead < 0;
break;
}
Pipeline.FireChannelRead(byteBuffer);
allocHandle.IncMessagesRead(1);
}while (allocHandle.ContinueReading());
allocHandle.ReadComplete();
ReadPending = false;
Pipeline.FireChannelReadComplete();
}
catch (Exception e) when(!e.IsFatal())
{
// Since this method returns void, all exceptions must be handled here.
byteBuffer?.Release();
allocHandle?.ReadComplete();
ReadPending = false;
Pipeline.FireChannelReadComplete();
Pipeline.FireExceptionCaught(e);
close = true;
}
if (close)
{
if (Active)
{
await HandleCloseAsync().ConfigureAwait(false);
}
}
}
public AdaptiveRecvByteBufAllocatorTest()
{
_config = new Mock <IChannelConfiguration>();
_config.SetupGet(x => x.IsAutoRead).Returns(true);
AdaptiveRecvByteBufAllocator recvByteBufAllocator = new AdaptiveRecvByteBufAllocator(64, 512, 1024 * 1024 * 10);
_handle = recvByteBufAllocator.NewHandle();
_handle.Reset(_config.Object);
}
// Read callback from libuv thread
void INativeUnsafe.FinishRead(ReadOperation operation)
{
var ch = (NativeChannel)this.channel;
IChannelConfiguration config = ch.Configuration;
IChannelPipeline pipeline = ch.Pipeline;
OperationException error = operation.Error;
bool close = error != null || operation.EndOfStream;
IRecvByteBufAllocatorHandle allocHandle = this.RecvBufAllocHandle;
allocHandle.Reset(config);
IByteBuffer buffer = operation.Buffer;
Debug.Assert(buffer != null);
allocHandle.LastBytesRead = operation.Status;
if (allocHandle.LastBytesRead <= 0)
{
// nothing was read -> release the buffer.
buffer.Release();
}
else
{
buffer.SetWriterIndex(buffer.WriterIndex + operation.Status);
allocHandle.IncMessagesRead(1);
ch.ReadPending = false;
pipeline.FireChannelRead(buffer);
}
allocHandle.ReadComplete();
pipeline.FireChannelReadComplete();
if (close)
{
if (error != null)
{
pipeline.FireExceptionCaught(new ChannelException(error));
}
this.CloseSafe();
}
else
{
// If read is called from channel read or read complete
// do not stop reading
if (!ch.ReadPending && !config.AutoRead)
{
ch.DoStopRead();
}
}
}
ReadOperation INativeUnsafe.PrepareRead()
{
NativeChannel ch = this.Channel;
IChannelConfiguration config = ch.Configuration;
IByteBufferAllocator allocator = config.Allocator;
IRecvByteBufAllocatorHandle allocHandle = this.RecvBufAllocHandle;
allocHandle.Reset(config);
IByteBuffer buffer = allocHandle.Allocate(allocator);
allocHandle.AttemptedBytesRead = buffer.WritableBytes;
return(new ReadOperation(this, buffer));
}
public override void FinishRead(SocketChannelAsyncOperation operation)
{
Contract.Assert(this.channel.EventLoop.InEventLoop);
TcpServerSocketChannel ch = this.Channel;
if ((ch.ResetState(StateFlags.ReadScheduled) & StateFlags.Active) == 0)
{
return; // read was signaled as a result of channel closure
}
IChannelConfiguration config = ch.Configuration;
IChannelPipeline pipeline = ch.Pipeline;
IRecvByteBufAllocatorHandle allocHandle = this.Channel.Unsafe.RecvBufAllocHandle;
allocHandle.Reset(config);
bool closed = false;
Exception exception = null;
try
{
Socket connectedSocket = null;
try
{
connectedSocket = operation.AcceptSocket;
operation.AcceptSocket = null;
operation.Validate();
var message = this.PrepareChannel(connectedSocket);
connectedSocket = null;
ch.ReadPending = false;
pipeline.FireChannelRead(message);
allocHandle.IncMessagesRead(1);
if (!config.AutoRead && !ch.ReadPending)
{
// ChannelConfig.setAutoRead(false) was called in the meantime.
// Completed Accept has to be processed though.
return;
}
while (allocHandle.ContinueReading())
{
connectedSocket = ch.Socket.Accept();
message = this.PrepareChannel(connectedSocket);
connectedSocket = null;
ch.ReadPending = false;
pipeline.FireChannelRead(message);
allocHandle.IncMessagesRead(1);
}
}
catch (SocketException ex) when(ex.SocketErrorCode == SocketError.OperationAborted || ex.SocketErrorCode == SocketError.InvalidArgument)
{
closed = true;
}
catch (SocketException ex) when(ex.SocketErrorCode == SocketError.WouldBlock)
{
}
catch (SocketException ex)
{
// socket exceptions here are internal to channel's operation and should not go through the pipeline
// especially as they have no effect on overall channel's operation
Logger.Info("Exception on accept.", ex);
}
catch (ObjectDisposedException)
{
closed = true;
}
catch (Exception ex)
{
exception = ex;
}
allocHandle.ReadComplete();
pipeline.FireChannelReadComplete();
if (exception != null)
{
// ServerChannel should not be closed even on SocketException because it can often continue
// accepting incoming connections. (e.g. too many open files)
pipeline.FireExceptionCaught(exception);
}
if (closed && ch.Open)
{
this.CloseSafe();
}
}
finally
{
// Check if there is a readPending which was not processed yet.
if (!closed && (ch.ReadPending || config.AutoRead))
{
ch.DoBeginRead();
}
}
}
// Read callback from libuv thread
void INativeUnsafe.FinishRead(ReadOperation operation)
{
var ch = _channel;
IChannelConfiguration config = ch.Configuration;
IChannelPipeline pipeline = ch.Pipeline;
OperationException error = operation.Error;
bool close = error is object || operation.EndOfStream;
IRecvByteBufAllocatorHandle allocHandle = RecvBufAllocHandle;
allocHandle.Reset(config);
IByteBuffer buffer = operation.Buffer;
Debug.Assert(buffer is object);
allocHandle.LastBytesRead = operation.Status;
if (allocHandle.LastBytesRead <= 0)
{
// nothing was read -> release the buffer.
_ = buffer.Release();
close = allocHandle.LastBytesRead < 0;
if (close)
{
// There is nothing left to read as we received an EOF.
ch.ReadPending = false;
}
}
else
{
_ = buffer.SetWriterIndex(buffer.WriterIndex + operation.Status);
allocHandle.IncMessagesRead(1);
ch.ReadPending = false;
_ = pipeline.FireChannelRead(buffer);
}
allocHandle.ReadComplete();
_ = pipeline.FireChannelReadComplete();
if (close)
{
if (error is object)
{
_ = pipeline.FireExceptionCaught(ThrowHelper.GetChannelException(error));
}
if (ch.Open)
{
Close(VoidPromise());
} // ## 苦竹 修改 this.CloseSafe(); ##
}
else
{
// If read is called from channel read or read complete
// do not stop reading
if (!ch.ReadPending && !config.AutoRead)
{
ch.DoStopRead();
}
}
}
public override void FinishRead(SocketChannelAsyncOperation operation)
{
Contract.Assert(this.channel.EventLoop.InEventLoop);
TcpServerSocketChannel ch = this.Channel;
if ((ch.ResetState(StateFlags.ReadScheduled) & StateFlags.Active) == 0)
{
return; // read was signaled as a result of channel closure
}
IChannelConfiguration config = ch.Configuration;
IChannelPipeline pipeline = ch.Pipeline;
IRecvByteBufAllocatorHandle allocHandle = this.Channel.Unsafe.RecvBufAllocHandle;
allocHandle.Reset(config);
bool closed = false;
Exception exception = null;
try
{
Socket connectedSocket = null;
try
{
connectedSocket = operation.AcceptSocket;
operation.Validate();
operation.AcceptSocket = null;
var message = new TcpSocketChannel(ch, connectedSocket, true);
ch.ReadPending = false;
pipeline.FireChannelRead(message);
allocHandle.IncMessagesRead(1);
if (!config.AutoRead && !ch.ReadPending)
{
// ChannelConfig.setAutoRead(false) was called in the meantime.
// Completed Accept has to be processed though.
return;
}
while (allocHandle.ContinueReading())
{
connectedSocket = null;
connectedSocket = ch.Socket.Accept();
message = new TcpSocketChannel(ch, connectedSocket, true);
ch.ReadPending = false;
pipeline.FireChannelRead(message);
allocHandle.IncMessagesRead(1);
}
}
catch (ObjectDisposedException)
{
closed = true;
}
catch (Exception ex)
{
var asSocketException = ex as SocketException;
if (asSocketException == null || asSocketException.SocketErrorCode != SocketError.WouldBlock)
{
Logger.Warn("Failed to create a new channel from an accepted socket.", ex);
if (connectedSocket != null)
{
try
{
connectedSocket.Dispose();
}
catch (Exception ex2)
{
Logger.Warn("Failed to close a socket.", ex2);
}
}
exception = ex;
}
}
allocHandle.ReadComplete();
pipeline.FireChannelReadComplete();
if (exception != null)
{
// ServerChannel should not be closed even on SocketException because it can often continue
// accepting incoming connections. (e.g. too many open files)
pipeline.FireExceptionCaught(exception);
}
if (closed)
{
if (ch.Open)
{
this.CloseAsync();
}
}
}
finally
{
// Check if there is a readPending which was not processed yet.
if (!closed && (ch.ReadPending || config.AutoRead))
{
ch.DoBeginRead();
}
}
}
//new AbstractSocketMessageChannel Channel => (AbstractSocketMessageChannel)this.channel;
public override void FinishRead(SocketChannelAsyncOperation <TChannel, TUnsafe> operation)
{
Debug.Assert(_channel.EventLoop.InEventLoop);
var ch = _channel;
if (0u >= (uint)(ch.ResetState(StateFlags.ReadScheduled) & StateFlags.Active))
{
return; // read was signaled as a result of channel closure
}
IChannelConfiguration config = ch.Configuration;
IChannelPipeline pipeline = ch.Pipeline;
IRecvByteBufAllocatorHandle allocHandle = ch.Unsafe.RecvBufAllocHandle;
allocHandle.Reset(config);
bool closed = false;
Exception exception = null;
try
{
try
{
do
{
int localRead = ch.DoReadMessages(_readBuf);
uint uLocalRead = (uint)localRead;
if (0u >= uLocalRead)
{
break;
}
if (uLocalRead > SharedConstants.TooBigOrNegative) // localRead < 0
{
closed = true;
break;
}
allocHandle.IncMessagesRead(localRead);
}while (allocHandle.ContinueReading());
}
catch (Exception t)
{
exception = t;
}
int size = _readBuf.Count;
for (int i = 0; i < size; i++)
{
ch.ReadPending = false;
_ = pipeline.FireChannelRead(_readBuf[i]);
}
_readBuf.Clear();
allocHandle.ReadComplete();
_ = pipeline.FireChannelReadComplete();
if (exception is object)
{
if (exception is SocketException asSocketException && asSocketException.SocketErrorCode != SocketError.TryAgain) // todo: other conditions for not closing message-based socket?
{
// ServerChannel should not be closed even on SocketException because it can often continue
// accepting incoming connections. (e.g. too many open files)
closed = !(ch is IServerChannel);
}
_ = pipeline.FireExceptionCaught(exception);
}
if (closed)
{
if (ch.Open)
{
Close(VoidPromise());
}
}
}
finally
{
// Check if there is a readPending which was not processed yet.
// This could be for two reasons:
// /// The user called Channel.read() or ChannelHandlerContext.read() in channelRead(...) method
// /// The user called Channel.read() or ChannelHandlerContext.read() in channelReadComplete(...) method
//
// See https://github.com/netty/netty/issues/2254
if (!closed && (ch.ReadPending || config.AutoRead))
{
ch.DoBeginRead();
}
}
}
protected override async void DoBeginRead()
{
IByteBuffer byteBuffer = null;
IRecvByteBufAllocatorHandle allocHandle = null;
bool close = false;
try
{
if (!this.Open || this.ReadPending)
{
return;
}
this.ReadPending = true;
IByteBufferAllocator allocator = this.Configuration.Allocator;
allocHandle = this.Configuration.RecvByteBufAllocator.NewHandle();
allocHandle.Reset(this.Configuration);
do
{
byteBuffer = allocHandle.Allocate(allocator);
allocHandle.LastBytesRead = await this.DoReadBytes(byteBuffer);
if (allocHandle.LastBytesRead <= 0)
{
// nothing was read -> release the buffer.
byteBuffer.Release();
byteBuffer = null;
close = allocHandle.LastBytesRead < 0;
break;
}
this.Pipeline.FireChannelRead(byteBuffer);
allocHandle.IncMessagesRead(1);
}while (allocHandle.ContinueReading());
allocHandle.ReadComplete();
this.ReadPending = false;
this.Pipeline.FireChannelReadComplete();
}
catch (Exception e) when(!e.IsFatal())
{
Events.ReadException(this.correlationId, e);
// Since this method returns void, all exceptions must be handled here.
byteBuffer.SafeRelease();
allocHandle?.ReadComplete();
this.ReadPending = false;
// WebSocket should change its state when an exception is thrown,
// but it doesn't (see https://github.com/dotnet/corefx/issues/26219)
// so we'll abort the connection here.
this.Abort();
this.Pipeline.FireChannelReadComplete();
this.Pipeline.FireExceptionCaught(e);
close = true;
}
if (close)
{
if (this.Active)
{
await this.HandleCloseAsync();
}
}
}
public override void FinishRead(SocketChannelAsyncOperation operation)
{
AbstractSocketByteChannel ch = this.Channel;
if ((ch.ResetState(StateFlags.ReadScheduled) & StateFlags.Active) == 0)
{
return; // read was signaled as a result of channel closure
}
IChannelConfiguration config = ch.Configuration;
IChannelPipeline pipeline = ch.Pipeline;
IByteBufferAllocator allocator = config.Allocator;
IRecvByteBufAllocatorHandle allocHandle = this.RecvBufAllocHandle;
allocHandle.Reset(config);
IByteBuffer byteBuf = null;
bool close = false;
try
{
operation.Validate();
do
{
byteBuf = allocHandle.Allocate(allocator);
//int writable = byteBuf.WritableBytes;
allocHandle.LastBytesRead = ch.DoReadBytes(byteBuf);
if (allocHandle.LastBytesRead <= 0)
{
// nothing was read -> release the buffer.
byteBuf.Release();
byteBuf = null;
close = allocHandle.LastBytesRead < 0;
break;
}
allocHandle.IncMessagesRead(1);
this.Channel.ReadPending = false;
pipeline.FireChannelRead(byteBuf);
byteBuf = null;
}while (allocHandle.ContinueReading());
allocHandle.ReadComplete();
pipeline.FireChannelReadComplete();
if (close)
{
this.CloseOnRead();
}
}
catch (Exception t)
{
this.HandleReadException(pipeline, byteBuf, t, close, allocHandle);
}
finally
{
// Check if there is a readPending which was not processed yet.
// This could be for two reasons:
// /// The user called Channel.read() or ChannelHandlerContext.read() input channelRead(...) method
// /// The user called Channel.read() or ChannelHandlerContext.read() input channelReadComplete(...) method
//
// See https://github.com/netty/netty/issues/2254
if (!close && (ch.ReadPending || config.AutoRead))
{
ch.DoBeginRead();
}
}
}
public override void FinishRead(SocketChannelAsyncOperation <TChannel, TUnsafe> operation)
{
var ch = _channel;
if (0u >= (uint)(ch.ResetState(StateFlags.ReadScheduled) & StateFlags.Active))
{
return; // read was signaled as a result of channel closure
}
IChannelConfiguration config = ch.Configuration;
if (ch.ShouldBreakReadReady(config))
{
ch.ClearReadPending();
return;
}
IChannelPipeline pipeline = ch.Pipeline;
IByteBufferAllocator allocator = config.Allocator;
IRecvByteBufAllocatorHandle allocHandle = RecvBufAllocHandle;
allocHandle.Reset(config);
IByteBuffer byteBuf = null;
bool close = false;
try
{
operation.Validate();
do
{
byteBuf = allocHandle.Allocate(allocator);
allocHandle.LastBytesRead = ch.DoReadBytes(byteBuf);
if ((uint)(allocHandle.LastBytesRead - 1) > SharedConstants.TooBigOrNegative) // <= 0
{
// nothing was read -> release the buffer.
_ = byteBuf.Release();
byteBuf = null;
close = (uint)allocHandle.LastBytesRead > SharedConstants.TooBigOrNegative; // < 0
if (close)
{
// There is nothing left to read as we received an EOF.
ch.ReadPending = false;
}
break;
}
allocHandle.IncMessagesRead(1);
ch.ReadPending = false;
_ = pipeline.FireChannelRead(byteBuf);
byteBuf = null;
}while (allocHandle.ContinueReading());
allocHandle.ReadComplete();
_ = pipeline.FireChannelReadComplete();
if (close)
{
CloseOnRead();
}
}
catch (Exception t)
{
HandleReadException(pipeline, byteBuf, t, close, allocHandle);
}
finally
{
// Check if there is a readPending which was not processed yet.
// This could be for two reasons:
// /// The user called Channel.read() or ChannelHandlerContext.read() input channelRead(...) method
// /// The user called Channel.read() or ChannelHandlerContext.read() input channelReadComplete(...) method
//
// See https://github.com/netty/netty/issues/2254
if (!close && (ch.ReadPending || config.IsAutoRead))
{
ch.DoBeginRead();
}
}
}
public override void FinishRead(SocketChannelAsyncOperation <TServerChannel, TcpServerSocketChannelUnsafe> operation)
{
Debug.Assert(_channel.EventLoop.InEventLoop);
var ch = _channel;
if (0u >= (uint)(ch.ResetState(StateFlags.ReadScheduled) & StateFlags.Active))
{
return; // read was signaled as a result of channel closure
}
IChannelConfiguration config = ch.Configuration;
IChannelPipeline pipeline = ch.Pipeline;
IRecvByteBufAllocatorHandle allocHandle = ch.Unsafe.RecvBufAllocHandle;
allocHandle.Reset(config);
var closed = false;
var aborted = false;
Exception exception = null;
try
{
Socket connectedSocket = null;
try
{
connectedSocket = operation.AcceptSocket;
operation.AcceptSocket = null;
operation.Validate();
var message = PrepareChannel(connectedSocket);
connectedSocket = null;
ch.ReadPending = false;
_ = pipeline.FireChannelRead(message);
allocHandle.IncMessagesRead(1);
if (!config.IsAutoRead && !ch.ReadPending)
{
// ChannelConfig.setAutoRead(false) was called in the meantime.
// Completed Accept has to be processed though.
return;
}
while (allocHandle.ContinueReading())
{
connectedSocket = ch.Socket.Accept();
message = PrepareChannel(connectedSocket);
connectedSocket = null;
ch.ReadPending = false;
_ = pipeline.FireChannelRead(message);
allocHandle.IncMessagesRead(1);
}
}
catch (SocketException ex) when(ex.SocketErrorCode.IsSocketAbortError())
{
ch.Socket.SafeClose(); // Unbind......
exception = ex;
aborted = true;
}
catch (SocketException ex) when(ex.SocketErrorCode == SocketError.WouldBlock)
{
}
catch (SocketException ex)
{
// socket exceptions here are internal to channel's operation and should not go through the pipeline
// especially as they have no effect on overall channel's operation
if (Logger.InfoEnabled)
{
Logger.ExceptionOnAccept(ex);
}
}
catch (ObjectDisposedException)
{
closed = true;
}
catch (Exception ex)
{
exception = ex;
}
allocHandle.ReadComplete();
_ = pipeline.FireChannelReadComplete();
if (exception is object)
{
// ServerChannel should not be closed even on SocketException because it can often continue
// accepting incoming connections. (e.g. too many open files)
_ = pipeline.FireExceptionCaught(exception);
}
if (ch.IsOpen)
{
if (closed)
{
Close(VoidPromise());
}
else if (aborted)
{
ch.CloseSafe();
}
}
}
finally
{
// Check if there is a readPending which was not processed yet.
if (!closed && (ch.ReadPending || config.IsAutoRead))
{
ch.DoBeginRead();
}
}
}
public override void FinishRead(SocketChannelAsyncOperation operation)
{
Contract.Assert(this.channel.EventLoop.InEventLoop);
AbstractSocketMessageChannel ch = this.Channel;
ch.ResetState(StateFlags.ReadScheduled);
IChannelConfiguration config = ch.Configuration;
IChannelPipeline pipeline = ch.Pipeline;
IRecvByteBufAllocatorHandle allocHandle = this.Channel.Unsafe.RecvBufAllocHandle;
allocHandle.Reset(config);
bool closed = false;
Exception exception = null;
try
{
try
{
do
{
int localRead = ch.DoReadMessages(this.readBuf);
if (localRead == 0)
{
break;
}
if (localRead < 0)
{
closed = true;
break;
}
allocHandle.IncMessagesRead(localRead);
}while (allocHandle.ContinueReading());
}
catch (Exception t)
{
exception = t;
}
int size = this.readBuf.Count;
for (int i = 0; i < size; i++)
{
ch.ReadPending = false;
pipeline.FireChannelRead(this.readBuf[i]);
}
this.readBuf.Clear();
allocHandle.ReadComplete();
pipeline.FireChannelReadComplete();
if (exception != null)
{
var asSocketException = exception as SocketException;
if (asSocketException != null && asSocketException.SocketErrorCode != SocketError.TryAgain) // todo: other conditions for not closing message-based socket?
{
// ServerChannel should not be closed even on SocketException because it can often continue
// accepting incoming connections. (e.g. too many open files)
closed = !(ch is IServerChannel);
}
pipeline.FireExceptionCaught(exception);
}
if (closed)
{
if (ch.Open)
{
this.CloseAsync();
}
}
}
finally
{
// Check if there is a readPending which was not processed yet.
// This could be for two reasons:
// /// The user called Channel.read() or ChannelHandlerContext.read() in channelRead(...) method
// /// The user called Channel.read() or ChannelHandlerContext.read() in channelReadComplete(...) method
//
// See https://github.com/netty/netty/issues/2254
if (!closed && (ch.ReadPending || config.AutoRead))
{
ch.DoBeginRead();
}
}
}