public override void ChannelInactive(IChannelHandlerContext ctx)
{
ThreadLocalObjectList output = ThreadLocalObjectList.NewInstance();
try
{
if (this.cumulation != null)
{
this.CallDecode(ctx, this.cumulation, output);
this.DecodeLast(ctx, this.cumulation, output);
}
else
{
this.DecodeLast(ctx, Unpooled.Empty, output);
}
}
catch (DecoderException e)
{
throw e;
}
catch (Exception e)
{
throw new DecoderException(e);
}
finally
{
try
{
if (this.cumulation != null)
{
this.cumulation.Release();
this.cumulation = null;
}
int size = output.Count;
for (int i = 0; i < size; i++)
{
ctx.FireChannelRead(output[i]);
}
if (size > 0)
{
// Something was read, call fireChannelReadComplete()
ctx.FireChannelReadComplete();
}
ctx.FireChannelInactive();
}
finally
{
// recycle in all cases
output.Return();
}
}
}
/// <inheritdoc />
public override void ChannelRead(IChannelHandlerContext context, object message)
{
if (message is IByteBuffer data)
{
ThreadLocalObjectList output = ThreadLocalObjectList.NewInstance();
try
{
_first = _cumulation is null;
_cumulation = _cumulator.Cumulate(context.Allocator, _first ? Unpooled.Empty : _cumulation, data);
CallDecode(context, _cumulation, output);
}
catch (DecoderException)
{
throw;
}
catch (Exception ex)
{
CThrowHelper.ThrowDecoderException(ex);
}
finally
{
try
{
if (_cumulation is object && !_cumulation.IsReadable())
{
_numReads = 0;
_ = _cumulation.Release();
_cumulation = null;
}
else if (++_numReads >= _discardAfterReads)
{
// We did enough reads already try to discard some bytes so we not risk to see a OOME.
// See https://github.com/netty/netty/issues/4275
_numReads = 0;
DiscardSomeReadBytes();
}
int size = output.Count;
_firedChannelRead |= (uint)size > 0u;
FireChannelRead(context, output, size);
}
finally
{
output.Return();
}
}
}
else
{
_ = context.FireChannelRead(message);
}
}
public override void ChannelRead(IChannelHandlerContext context, object message)
{
var data = message as IByteBuffer;
if (data != null)
{
ThreadLocalObjectList output = ThreadLocalObjectList.NewInstance();
try
{
this.first = this.cumulation == null;
if (this.first)
{
this.cumulation = data;
}
else
{
this.cumulation = this.cumulator(context.Allocator, this.cumulation, data);
}
this.CallDecode(context, this.cumulation, output);
}
catch (DecoderException)
{
throw;
}
catch (Exception ex)
{
throw new DecoderException(ex);
}
finally
{
if (this.cumulation != null && !this.cumulation.IsReadable())
{
this.cumulation.Release();
this.cumulation = null;
}
int size = output.Count;
this.decodeWasNull = size == 0;
for (int i = 0; i < size; i++)
{
context.FireChannelRead(output[i]);
}
output.Return();
}
}
else
{
context.FireChannelRead(message);
}
}
/// <summary>
/// Write messages to the outbound of this <see cref="IChannel" />.
/// </summary>
/// <param name="msgs">The messages to be written.</param>
/// <returns><c>true</c> if the write operation did add something to the inbound buffer</returns>
public bool WriteOutbound(params object[] msgs)
{
this.EnsureOpen();
if (msgs.Length == 0)
{
return(IsNotEmpty(this.outboundMessages));
}
ThreadLocalObjectList futures = ThreadLocalObjectList.NewInstance(msgs.Length);
foreach (object m in msgs)
{
if (m == null)
{
break;
}
futures.Add(this.WriteAsync(m));
}
// We need to call RunPendingTasks first as a IChannelHandler may have used IEventLoop.Execute(...) to
// delay the write on the next event loop run.
this.RunPendingTasks();
this.Flush();
int size = futures.Count;
for (int i = 0; i < size; i++)
{
var future = (Task)futures[i];
if (future.IsCompleted)
{
this.RecordException(future);
}
else
{
// The write may be delayed to run later by runPendingTasks()
future.ContinueWith(t => this.RecordException(t));
}
Debug.Assert(future.IsCompleted);
if (future.Exception != null)
{
this.RecordException(future.Exception);
}
}
this.RunPendingTasks();
this.CheckException();
return(IsNotEmpty(this.outboundMessages));
}
/// <inheritdoc />
public override void ChannelRead(IChannelHandlerContext context, object message)
{
ThreadLocalObjectList output = ThreadLocalObjectList.NewInstance();
try
{
if (this.AcceptInboundMessage(message))
{
var cast = (T)message;
try
{
this.Decode(context, cast, output);
}
finally
{
_ = ReferenceCountUtil.Release(cast);
}
}
else
{
output.Add(message);
}
}
catch (DecoderException)
{
throw;
}
catch (Exception e)
{
CThrowHelper.ThrowDecoderException(e);
}
finally
{
try
{
int size = output.Count;
for (int i = 0; i < size; i++)
{
_ = context.FireChannelRead(output[i]);
}
}
finally
{
output.Return();
}
}
}
/// <inheritdoc />
public override void ChannelRead(IChannelHandlerContext context, object message)
{
ThreadLocalObjectList output = ThreadLocalObjectList.NewInstance();
try
{
if (message is IByteBuffer byteBuffer)
{
try
{
var reader = new ByteBufferReader(byteBuffer);
Decode(context, ref reader, output);
}
finally
{
_ = ReferenceCountUtil.Release(message);
}
}
else
{
output.Add(message);
}
}
catch (DecoderException)
{
throw;
}
catch (Exception e)
{
CThrowHelper.ThrowDecoderException(e);
}
finally
{
try
{
int size = output.Count;
for (int i = 0; i < size; i++)
{
_ = context.FireChannelRead(output[i]);
}
}
finally
{
output.Return();
}
}
}
/// <summary>
/// Write messages to the outbound of this <see cref="IChannel" />.
/// </summary>
/// <param name="msgs">The messages to be written.</param>
/// <returns><c>true</c> if the write operation did add something to the inbound buffer</returns>
public bool WriteOutbound(params object[] msgs)
{
EnsureOpen();
if (0u >= (uint)msgs.Length)
{
return(_outboundMessages.NonEmpty);
}
ThreadLocalObjectList futures = ThreadLocalObjectList.NewInstance(msgs.Length);
try
{
for (int i = 0; i < msgs.Length; i++)
{
object m = msgs[i];
if (m is null)
{
break;
}
futures.Add(WriteAsync(m));
}
FlushOutbound0();
int size = futures.Count;
for (int i = 0; i < size; i++)
{
var future = (Task)futures[i];
if (future.IsCompleted)
{
RecordException(future);
}
else
{
// The write may be delayed to run later by RunPendingTasks()
future.ContinueWith(t => RecordException(t), TaskContinuationOptions.ExecuteSynchronously);
}
}
CheckException();
return(_outboundMessages.NonEmpty);
}
finally
{
futures.Return();
}
}
static void EncodeSubscribeMessage(IByteBufferAllocator bufferAllocator, SubscribePacket packet, List <object> output)
{
const int VariableHeaderSize = PacketIdLength;
int payloadBufferSize = 0;
ThreadLocalObjectList encodedTopicFilters = ThreadLocalObjectList.NewInstance();
IByteBuffer buf = null;
try
{
foreach (SubscriptionRequest topic in packet.Requests)
{
byte[] topicFilterBytes = EncodeStringInUtf8(topic.TopicFilter);
payloadBufferSize += StringSizeLength + topicFilterBytes.Length + 1; // length, value, QoS
encodedTopicFilters.Add(topicFilterBytes);
}
int variablePartSize = VariableHeaderSize + payloadBufferSize;
int fixedHeaderBufferSize = 1 + MaxVariableLength;
buf = bufferAllocator.Buffer(fixedHeaderBufferSize + variablePartSize);
buf.WriteByte(CalculateFirstByteOfFixedHeader(packet));
WriteVariableLengthInt(buf, variablePartSize);
// Variable Header
buf.WriteShort(packet.PacketId); // todo: review: validate?
// Payload
for (int i = 0; i < encodedTopicFilters.Count; i++)
{
var topicFilterBytes = (byte[])encodedTopicFilters[i];
buf.WriteShort(topicFilterBytes.Length);
buf.WriteBytes(topicFilterBytes, 0, topicFilterBytes.Length);
buf.WriteByte((int)packet.Requests[i].QualityOfService);
}
output.Add(buf);
buf = null;
}
finally
{
buf?.SafeRelease();
encodedTopicFilters.Return();
}
}
static void EncodeUnsubscribeMessage(IByteBufferAllocator bufferAllocator, UnsubscribePacket packet, List <Object> output)
{
const Int32 VariableHeaderSize = 2;
var payloadBufferSize = 0;
ThreadLocalObjectList encodedTopicFilters = ThreadLocalObjectList.NewInstance();
Packet buf = null;
try
{
foreach (var topic in packet.TopicFilters)
{
var topicFilterBytes = EncodeStringInUtf8(topic);
payloadBufferSize += StringSizeLength + topicFilterBytes.Length; // length, value
encodedTopicFilters.Add(topicFilterBytes);
}
var variablePartSize = VariableHeaderSize + payloadBufferSize;
var fixedHeaderBufferSize = 1 + MaxVariableLength;
buf = bufferAllocator.Buffer(fixedHeaderBufferSize + variablePartSize);
buf.WriteByte(CalculateFirstByteOfFixedHeader(packet));
WriteVariableLengthInt(buf, variablePartSize);
// Variable Header
buf.WriteShort(packet.PacketId); // todo: review: validate?
// Payload
for (var i = 0; i < encodedTopicFilters.Count; i++)
{
var topicFilterBytes = (Byte[])encodedTopicFilters[i];
buf.WriteShort(topicFilterBytes.Length);
buf.WriteBytes(topicFilterBytes, 0, topicFilterBytes.Length);
}
output.Add(buf);
buf = null;
}
finally
{
buf?.SafeRelease();
encodedTopicFilters.Return();
}
}
private void ChannelInputClosed(IChannelHandlerContext ctx, bool callChannelInactive)
{
ThreadLocalObjectList output = ThreadLocalObjectList.NewInstance();
try
{
ChannelInputClosed(ctx, output);
}
catch (DecoderException)
{
throw;
}
catch (Exception e)
{
CThrowHelper.ThrowDecoderException(e);
}
finally
{
try
{
if (_cumulation is object)
{
_ = _cumulation.Release();
_cumulation = null;
}
int size = output.Count;
if ((uint)size > 0u)
{
FireChannelRead(ctx, output, size);
// Something was read, call fireChannelReadComplete()
_ = ctx.FireChannelReadComplete();
}
if (callChannelInactive)
{
_ = ctx.FireChannelInactive();
}
}
finally
{
// Recycle in all cases
output.Return();
}
}
}
public override Task WriteAsync(IChannelHandlerContext ctx, object msg)
{
Task result;
ThreadLocalObjectList output = null;
try
{
if (this.AcceptOutboundMessage(msg))
{
output = ThreadLocalObjectList.NewInstance();
var cast = (T)msg;
try
{
this.Encode(ctx, cast, output);
}
finally
{
ReferenceCountUtil.Release(cast);
}
if (output.Count == 0)
{
output.Return();
output = null;
throw new EncoderException(this.GetType().Name + " must produce at least one message.");
}
}
else
{
return(ctx.WriteAsync(msg));
}
}
catch (EncoderException e)
{
return(TaskEx.FromException(e));
}
catch (Exception ex)
{
return(TaskEx.FromException(new EncoderException(ex))); // todo: we don't have a stack on EncoderException but it's present on inner exception.
}
finally
{
if (output != null)
{
int lastItemIndex = output.Count - 1;
if (lastItemIndex == 0)
{
result = ctx.WriteAsync(output[0]);
}
else if (lastItemIndex > 0)
{
for (int i = 0; i < lastItemIndex; i++)
{
// we don't care about output from these messages as failure while sending one of these messages will fail all messages up to the last message - which will be observed by the caller in Task result.
ctx.WriteAsync(output[i]); // todo: optimize: once IChannelHandlerContext allows, pass "not interested in task" flag
}
result = ctx.WriteAsync(output[lastItemIndex]);
}
else
{
// 0 items in output - must never get here
result = null;
}
output.Return();
}
else
{
// output was reset during exception handling - must never get here
result = null;
}
}
return(result);
}
/// <inheritdoc />
public override void Write(IChannelHandlerContext ctx, object msg, IPromise promise)
{
ThreadLocalObjectList output = null;
try
{
if (AcceptOutboundMessage(msg))
{
output = ThreadLocalObjectList.NewInstance();
var cast = (T)msg;
try
{
Encode(ctx, cast, output);
}
finally
{
_ = ReferenceCountUtil.Release(cast);
}
if (0u >= (uint)output.Count)
{
CThrowHelper.ThrowEncoderException_MustProduceAtLeastOneMsg(GetType());
}
}
else
{
_ = ctx.WriteAsync(msg, promise);
}
}
catch (EncoderException)
{
throw;
}
catch (Exception ex)
{
CThrowHelper.ThrowEncoderException(ex); // todo: we don't have a stack on EncoderException but it's present on inner exception.
}
finally
{
if (output is object)
{
try
{
int lastItemIndex = output.Count - 1;
if (0u >= (uint)lastItemIndex)
{
_ = ctx.WriteAsync(output[0], promise);
}
else if (lastItemIndex > 0)
{
// Check if we can use a voidPromise for our extra writes to reduce GC-Pressure
// See https://github.com/netty/netty/issues/2525
if (promise == ctx.VoidPromise())
{
WriteVoidPromise(ctx, output);
}
else
{
WritePromiseCombiner(ctx, output, promise);
}
}
}
finally
{
output.Return();
}
}
}
}
private ApplicationProtocolNegotiationHandler()
{
_bufferedMessages = ThreadLocalObjectList.NewInstance();
}
public override Task WriteAsync(IChannelHandlerContext ctx, object msg)
{
Task result;
ThreadLocalObjectList output = null;
try
{
if (base.AcceptOutboundMessage(msg))
{
output = ThreadLocalObjectList.NewInstance();
var cast = (PacketInfo)msg;
try
{
base.Encode(ctx, cast, output);
}
finally
{
ReferenceCountUtil.Release(cast);
}
if (output.Count == 0)
{
output.Return();
output = null;
throw new EncoderException(this.GetType().Name + " must produce at least one message.");
}
}
else
{
return(ctx.WriteAsync(msg));
}
}
catch (EncoderException e)
{
throw new EncoderException(e);
}
catch (Exception ex)
{
throw new EncoderException(ex);
}
finally
{
if (output != null)
{
if (output.Count > 0)
{
IByteBuffer byteBuffer = Unpooled.CopiedBuffer(output.ConvertAll(v => v as IByteBuffer).ToArray());
result = ctx.WriteAsync(new BinaryWebSocketFrame(byteBuffer));
}
else
{
// 0 items in output - must never get here
result = null;
}
output.Return();
}
else
{
// output was reset during exception handling - must never get here
result = null;
}
}
return(result);
}