private void SerializeMessage(BaseMessage message, Stream output)
{
var crcIndex = (int)output.Position;
output.Position = crcIndex + 8; //这里预留8保存crc信息
var messageStart = (int)output.Position;
Flag flag = Flags.GetMessageFlags(message);
// flag
ByteBufHelper.WriteByte((byte)flag, output);
byte[] buffer = new byte[8];
// created time
ByteBufHelper.WriteInt64(message.CreatedTime.Value.ToTime(), buffer, output);
if (Flags.IsDelayMessage(flag))
{
//Schedule Time
ByteBufHelper.WriteInt64(message.ScheduleReceiveTime.Value.ToTime(), buffer, output);
}
else
{
// expired time
ByteBufHelper.WriteInt64(message.ExpiredTime.Value.ToTime(), buffer, output);
}
// subject
ByteBufHelper.WriteString(message.Subject, buffer, output);
// message id
ByteBufHelper.WriteString(message.MessageId, buffer, output);
WriteTags(flag, message, output);
//记录当前指针位置
int writerIndex = (int)output.Position;
int bodyStart = writerIndex + 4;
output.Position = bodyStart;
//指针 预留4个位置开始写 Attrs
SerializeMap(message.Attrs, buffer, output);
int end = (int)output.Position;
int bodyLen = end - bodyStart;
int messageLength = end - messageStart;
output.Position = writerIndex;
//记录 body 的长度
ByteBufHelper.WriteInt32(bodyLen, buffer, output);
//write crc32
output.Position = crcIndex;
ByteBufHelper.WriteInt64(Crc32.GetCRC32(output, messageStart, messageLength), buffer, output);
//指针重置到尾端
output.Position = end;
}
public void Write(Stream output)
{
byte[] buffer = new byte[8];
ByteBufHelper.WriteString(request.Subject, buffer, output);
ByteBufHelper.WriteString(request.Group, buffer, output);
ByteBufHelper.WriteString(request.ConsumerId, buffer, output);
ByteBufHelper.WriteInt64(request.PullOffsetBegin, buffer, output);
ByteBufHelper.WriteInt64(request.PullOffsetEnd, buffer, output);
ByteBufHelper.WriteByte((byte)(request.IsBroadcast ? 1 : 0), output);
}
void WriteTags(Flag flag, BaseMessage message, Stream output)
{
if (Flags.HasTag(flag))
{
var tags = message.GetTags();
byte[] buffer = new byte[8];
ByteBufHelper.WriteByte((byte)tags.Count, output);
foreach (var item in tags)
{
ByteBufHelper.WriteString(item, buffer, output);
}
}
}
public void Write(Stream output)
{
byte[] buffer = new byte[8];
ByteBufHelper.WriteString(_request.Subject, buffer, output);
ByteBufHelper.WriteString(_request.Group, buffer, output);
ByteBufHelper.WriteString(_request.ConsumerId, buffer, output);
ByteBufHelper.WriteInt32(_request.BatchSize, buffer, output);
ByteBufHelper.WriteInt64(_request.Offset, buffer, output);
ByteBufHelper.WriteInt64(_request.PullOffsetBegin, buffer, output);
ByteBufHelper.WriteInt64(_request.PullOffsetEnd, buffer, output);
ByteBufHelper.WriteInt64(_request.TimeoutMillis, buffer, output);
ByteBufHelper.WriteByte(_request.IsBroadcast, output);
WriteTags(_request, buffer, output);
}
private void WriteTags(PullMessageRequest request, byte[] buffer, Stream output)
{
ByteBufHelper.WriteInt16(_request.TagType, buffer, output);
var tags = request.Tags;
if (tags == null || tags.Length == 0)
{
ByteBufHelper.WriteByte((byte)0, output);
return;
}
ByteBufHelper.WriteByte((byte)tags.Length, output);
foreach (var tag in _request.Tags)
{
ByteBufHelper.WriteString(tag, buffer, output);
}
}