public bool TryDecodeMessage(out Message msg)
{
msg = null;
// Is there enough read into the buffer to continue (at least read the lengths?)
if (receiveOffset - decodeOffset < CalculateKnownMessageSize())
{
return(false);
}
// parse lengths if needed
if (headerLength == 0 || bodyLength == 0)
{
// get length segments
List <ArraySegment <byte> > lenghts = ByteArrayBuilder.BuildSegmentListWithLengthLimit(readBuffer, decodeOffset, Message.LENGTH_HEADER_SIZE);
// copy length segment to buffer
int lengthBufferoffset = 0;
foreach (ArraySegment <byte> seg in lenghts)
{
Buffer.BlockCopy(seg.Array, seg.Offset, lengthBuffer, lengthBufferoffset, seg.Count);
lengthBufferoffset += seg.Count;
}
// read lengths
headerLength = BitConverter.ToInt32(lengthBuffer, 0);
bodyLength = BitConverter.ToInt32(lengthBuffer, 4);
}
// If message is too big for current buffer size, grow
while (decodeOffset + CalculateKnownMessageSize() > currentBufferSize)
{
GrowBuffer();
}
// Is there enough read into the buffer to read full message
if (receiveOffset - decodeOffset < CalculateKnownMessageSize())
{
return(false);
}
// decode header
int headerOffset = decodeOffset + Message.LENGTH_HEADER_SIZE;
List <ArraySegment <byte> > header = ByteArrayBuilder.BuildSegmentListWithLengthLimit(readBuffer, headerOffset, headerLength);
// decode body
int bodyOffset = headerOffset + headerLength;
List <ArraySegment <byte> > body = ByteArrayBuilder.BuildSegmentListWithLengthLimit(readBuffer, bodyOffset, bodyLength);
// build message
this.deserializationContext.Reset();
this.deserializationContext.StreamReader.Reset(header);
msg = new Message
{
Headers = SerializationManager.DeserializeMessageHeaders(this.deserializationContext)
};
try
{
if (this.supportForwarding)
{
// If forwarding is supported, then deserialization will be deferred until the body value is needed.
// Need to maintain ownership of buffer, so we need to duplicate the body buffer.
msg.SetBodyBytes(this.DuplicateBuffer(body));
}
else
{
// Attempt to deserialize the body immediately.
msg.DeserializeBodyObject(this.serializationManager, body);
}
}
finally
{
MessagingStatisticsGroup.OnMessageReceive(msg, headerLength, bodyLength);
if (headerLength + bodyLength > this.serializationManager.LargeObjectSizeThreshold)
{
Log.Info(
ErrorCode.Messaging_LargeMsg_Incoming,
"Receiving large message Size={0} HeaderLength={1} BodyLength={2}. Msg={3}",
headerLength + bodyLength,
headerLength,
bodyLength,
msg.ToString());
if (Log.IsEnabled(LogLevel.Trace))
{
Log.Trace("Received large message {0}", msg.ToLongString());
}
}
// update parse receiveOffset and clear lengths
decodeOffset = bodyOffset + bodyLength;
headerLength = 0;
bodyLength = 0;
AdjustBuffer();
}
return(true);
}
public bool TryDecodeMessage(out Message msg)
{
msg = null;
// Is there enough read into the buffer to continue (at least read the lengths?)
if (receiveOffset - decodeOffset < CalculateKnownMessageSize())
return false;
// parse lengths if needed
if (headerLength == 0 || bodyLength == 0)
{
// get length segments
List<ArraySegment<byte>> lenghts = ByteArrayBuilder.BuildSegmentListWithLengthLimit(readBuffer, decodeOffset, Message.LENGTH_HEADER_SIZE);
// copy length segment to buffer
int lengthBufferoffset = 0;
foreach (ArraySegment<byte> seg in lenghts)
{
Buffer.BlockCopy(seg.Array, seg.Offset, lengthBuffer, lengthBufferoffset, seg.Count);
lengthBufferoffset += seg.Count;
}
// read lengths
headerLength = BitConverter.ToInt32(lengthBuffer, 0);
bodyLength = BitConverter.ToInt32(lengthBuffer, 4);
}
// If message is too big for current buffer size, grow
while (decodeOffset + CalculateKnownMessageSize() > currentBufferSize)
{
GrowBuffer();
}
// Is there enough read into the buffer to read full message
if (receiveOffset - decodeOffset < CalculateKnownMessageSize())
return false;
// decode header
int headerOffset = decodeOffset + Message.LENGTH_HEADER_SIZE;
List<ArraySegment<byte>> header = ByteArrayBuilder.BuildSegmentListWithLengthLimit(readBuffer, headerOffset, headerLength);
// decode body
int bodyOffset = headerOffset + headerLength;
List<ArraySegment<byte>> body = ByteArrayBuilder.BuildSegmentListWithLengthLimit(readBuffer, bodyOffset, bodyLength);
// build message
msg = new Message(header);
try
{
if (this.supportForwarding)
{
// If forwarding is supported, then deserialization will be deferred until the body value is needed.
// Need to maintain ownership of buffer, so we need to duplicate the body buffer.
msg.SetBodyBytes(this.DuplicateBuffer(body));
}
else
{
// Attempt to deserialize the body immediately.
msg.DeserializeBodyObject(body);
}
}
finally
{
MessagingStatisticsGroup.OnMessageReceive(msg, headerLength, bodyLength);
if (headerLength + bodyLength > Message.LargeMessageSizeThreshold)
{
Log.Info(
ErrorCode.Messaging_LargeMsg_Incoming,
"Receiving large message Size={0} HeaderLength={1} BodyLength={2}. Msg={3}",
headerLength + bodyLength,
headerLength,
bodyLength,
msg.ToString());
if (Log.IsVerbose3) Log.Verbose3("Received large message {0}", msg.ToLongString());
}
// update parse receiveOffset and clear lengths
decodeOffset = bodyOffset + bodyLength;
headerLength = 0;
bodyLength = 0;
AdjustBuffer();
}
return true;
}
