public PartialDecodedMessage DecodePartial(IoBuffer buf)
{
HermesPrimitiveCodec codec = new HermesPrimitiveCodec(buf);
// skip whole length
codec.ReadInt();
// skip header length
int headerLen = codec.ReadInt();
// skip body length
int bodyLen = codec.ReadInt();
verifyChecksum(buf, headerLen + bodyLen);
PartialDecodedMessage msg = new PartialDecodedMessage();
msg.Key = codec.ReadString();
msg.BornTime = codec.ReadLong();
msg.RemainingRetries = codec.ReadInt();
msg.BodyCodecType = codec.ReadString();
int len = codec.ReadInt();
msg.DurableProperties = buf.GetSlice(len);
len = codec.ReadInt();
msg.VolatileProperties = buf.GetSlice(len);
msg.Body = buf.GetSlice(bodyLen);
// skip crc
codec.ReadLong();
return msg;
}
private void readBatchDatas(IoBuffer buf, HermesPrimitiveCodec codec, List<TppConsumerMessageBatch> batches)
{
foreach (TppConsumerMessageBatch batch in batches)
{
int len = codec.ReadInt();
batch.Data = buf.GetSlice(len);
}
}
private void Encode(ProducerMessage message, IoBuffer buf, byte[] body, string codecType)
{
var codec = new HermesPrimitiveCodec(buf);
var indexBeginning = buf.Position;
codec.WriteInt(-1); // placeholder for whole length
var indexAfterWholeLen = buf.Position;
codec.WriteInt(-1); // placeholder for header length
codec.WriteInt(-1); // placeholder for body length
var indexBeforeHeader = buf.Position;
// header begin
codec.WriteString(message.Key);
codec.WriteLong(message.BornTime);
codec.WriteInt(0); //remaining retries
codec.WriteString(codecType);
var propertiesHolder = message.PropertiesHolder;
WriteProperties(propertiesHolder.DurableProperties, buf, codec);
WriteProperties(propertiesHolder.VolatileProperties, buf, codec);
// header end
var headerLen = buf.Position - indexBeforeHeader;
//body begin
var indexBeforeBody = buf.Position;
buf.Put(body);
var bodyLen = buf.Position - indexBeforeBody;
//body end
//crc
codec.WriteLong(ChecksumUtil.Crc32(buf.GetSlice(indexBeforeHeader, headerLen + bodyLen)));
var indexEnd = buf.Position;
var wholeLen = indexEnd - indexAfterWholeLen;
// refill whole length
buf.Position = indexBeginning;
codec.WriteInt(wholeLen);
// refill header length
codec.WriteInt(headerLen);
// refill body length
codec.WriteInt(bodyLen);
buf.Position = indexEnd;
}
