/// <summary>
        ///
        /// </summary>
        /// <param name="data"></param>
        public static void RegistTracing(ref object data)
        {
            var model = (data as RequestModel);

            if (model != null && model.Header != null)
            {
                var header = model.Header;
                header.RpcID = Util.VersionIncr(TracingContextData.GetSubRpcID());
            }
        }
        private static void Client_OnRequest(HttpRequestMessage request, RpcContext rpcContext)
        {
            var rpcId         = string.Empty;
            var requestHeader = TracingContextData.GetRequestHeader();

            if (requestHeader == null)
            {
                requestHeader = TracingContextData.GetDefaultRequestHeader();
                TracingContextData.SetRequestHeader(requestHeader);
                //HttpContentData.SetSubRpcID(modelHeader.RpcID + ".0");
                //rpcId = requestHeader.RpcID + ".0";
            }
            //else
            //{
            //    rpcId = Util.VersionIncr(TracingContextData.GetSubRpcID());
            //}
            rpcId = Util.VersionIncr(TracingContextData.GetSubRpcID());
            TracingContextData.SetSubRpcID(rpcId);

            rpcContext.Items[TraceIDKey] = requestHeader.TraceID;
            rpcContext.Items[RpcIDKey]   = rpcId;

            //post/put content is ObjectContent
            var oc = request.Content as ObjectContent;

            if (oc != null)
            {
                var reqModel = oc.Value as IRequestModel <Header>;
                if (reqModel != null)
                {
                    if (reqModel.Header == null)
                    {
                        reqModel.Header = new Header();
                    }

                    reqModel.Header.TraceID = requestHeader.TraceID;
                    reqModel.Header.RpcID   = rpcId;
                }
            }
        }