/// <summary>
/// Called one last time when the <see cref="IChannelHandlerContext" /> goes inactive, which means the
/// <see cref="IChannelHandler.ChannelInactive" /> was triggered.
/// By default this will jsut call <see cref="Decode" /> but sub-classes may override this for special cleanup
/// operations.
/// </summary>
protected virtual void DecodeLast(IChannelHandlerContext context, IByteBuf input, List <object> output)
{
if (input.IsReadable())
{
// Only call Decode if there is something left in the buffer to decode
Decode(context, input, output);
}
}
public override void ChannelRead(IChannelHandlerContext context, object message)
{
if (message is IByteBuf)
{
var output = RecyclableArrayList.Take();
try
{
var data = (IByteBuf)message;
_first = _cumulation == null;
if (_first)
{
_cumulation = data;
}
else
{
_cumulation = _cumulator(context.Allocator, _cumulation, data);
}
CallDecode(context, _cumulation, output);
}
catch (DecoderException)
{
throw;
}
catch (Exception ex)
{
throw new DecoderException(ex);
}
finally
{
if (_cumulation != null && !_cumulation.IsReadable())
{
_numReads = 0;
_cumulation.Release();
_cumulation = null;
}
else if (++_numReads >= _discardAfterReads)
{
_numReads = 0;
DiscardSomeReadBytes();
}
var size = output.Count;
_decodeWasNull = size == 0;
FireChannelRead(context, output, size);
output.Return();
}
}
else
{
// not a byte buffer? then we can't handle it. Forward it along
context.FireChannelRead(message);
}
}
private void HandleReadException(IChannelPipeline pipeline, IByteBuf byteBuf, Exception cause, bool close)
{
if (byteBuf != null)
{
if (byteBuf.IsReadable())
{
Channel.ReadPending = false;
pipeline.FireChannelRead(byteBuf);
}
else
{
byteBuf.Release();
}
}
pipeline.FireChannelReadComplete();
pipeline.FireExceptionCaught(cause);
if (close || cause is SocketException)
{
CloseOnRead();
}
}
public bool IsReadable()
{
return(_buf.IsReadable());
}
protected void CallDecode(IChannelHandlerContext context, IByteBuf input, List <object> output)
{
try
{
while (input.IsReadable())
{
var outSize = output.Count;
if (outSize > 0)
{
FireChannelRead(context, output, outSize);
output.Clear();
// Check if this handler was removed before continuing with decoding
// If it was removed, it is no longer safe to keep operating on the buffer
if (context.Removed)
{
break;
}
outSize = 0;
}
var oldInputLength = input.ReadableBytes;
Decode(context, input, output);
// Check if this handler was removed before continuing with decoding
// If it was removed, it is no longer safe to keep operating on the buffer
if (context.Removed)
{
break;
}
if (outSize == output.Count)
{
if (oldInputLength == input.ReadableBytes)
{
break;
}
continue;
}
if (oldInputLength == input.ReadableBytes)
{
throw new DecoderException($"{GetType()}.Decode() did not read anything but decoded a message.");
}
if (IsSingleDecode)
{
break;
}
}
}
catch (DecoderException)
{
throw;
}
catch (Exception ex)
{
throw new DecoderException(ex);
}
}
private void HandleReadException(IChannelPipeline pipeline, IByteBuf byteBuf, Exception cause, bool close)
{
if (byteBuf != null)
{
if (byteBuf.IsReadable())
{
Channel.ReadPending = false;
pipeline.FireChannelRead(byteBuf);
}
else
{
byteBuf.Release();
}
}
pipeline.FireChannelReadComplete();
pipeline.FireExceptionCaught(cause);
if (close || cause is SocketException)
{
CloseOnRead();
}
}
/// <summary>
/// Called one last time when the <see cref="IChannelHandlerContext" /> goes inactive, which means the
/// <see cref="IChannelHandler.ChannelInactive" /> was triggered.
/// By default this will jsut call <see cref="Decode" /> but sub-classes may override this for special cleanup
/// operations.
/// </summary>
protected virtual void DecodeLast(IChannelHandlerContext context, IByteBuf input, List<object> output)
{
if (input.IsReadable())
{
// Only call Decode if there is something left in the buffer to decode
Decode(context, input, output);
}
}
protected void CallDecode(IChannelHandlerContext context, IByteBuf input, List<object> output)
{
try
{
while (input.IsReadable())
{
var outSize = output.Count;
if (outSize > 0)
{
FireChannelRead(context, output, outSize);
output.Clear();
// Check if this handler was removed before continuing with decoding
// If it was removed, it is no longer safe to keep operating on the buffer
if (context.Removed)
break;
outSize = 0;
}
var oldInputLength = input.ReadableBytes;
Decode(context, input, output);
// Check if this handler was removed before continuing with decoding
// If it was removed, it is no longer safe to keep operating on the buffer
if (context.Removed)
break;
if (outSize == output.Count)
{
if (oldInputLength == input.ReadableBytes)
{
break;
}
continue;
}
if (oldInputLength == input.ReadableBytes)
{
throw new DecoderException($"{GetType()}.Decode() did not read anything but decoded a message.");
}
if (IsSingleDecode)
break;
}
}
catch (DecoderException)
{
throw;
}
catch (Exception ex)
{
throw new DecoderException(ex);
}
}
