| // Copyright 2016 gRPC authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| syntax = "proto3"; |
| |
| package google.trace; |
| |
| // Tracing information that is propagated with RPC's. |
| message TraceContext { |
| // A TraceId uniquely represents a single Trace. It is a 128-bit nonce. |
| // The 128-bit ID is split into 2 64-bit chunks. (REQUIRED) |
| fixed64 trace_id_hi = 1; |
| fixed64 trace_id_lo = 2; |
| // ID of parent (client) span. (REQUIRED) |
| fixed64 span_id = 3; |
| // Span option flags. First bit is true if this trace is sampled. (OPTIONAL) |
| fixed32 span_options = 4; |
| } |
