| // Copyright 2018 Google LLC |
| // |
| // 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. |
| |
| // +build go1.8 |
| |
| package trace |
| |
| import ( |
| "go.opencensus.io/trace" |
| "golang.org/x/net/context" |
| "google.golang.org/api/googleapi" |
| "google.golang.org/genproto/googleapis/rpc/code" |
| "google.golang.org/grpc/status" |
| ) |
| |
| func StartSpan(ctx context.Context, name string) context.Context { |
| ctx, _ = trace.StartSpan(ctx, name) |
| return ctx |
| } |
| |
| func EndSpan(ctx context.Context, err error) { |
| span := trace.FromContext(ctx) |
| if err != nil { |
| span.SetStatus(toStatus(err)) |
| } |
| span.End() |
| } |
| |
| // ToStatus interrogates an error and converts it to an appropriate |
| // OpenCensus status. |
| func toStatus(err error) trace.Status { |
| if err2, ok := err.(*googleapi.Error); ok { |
| return trace.Status{Code: httpStatusCodeToOCCode(err2.Code), Message: err2.Message} |
| } else if s, ok := status.FromError(err); ok { |
| return trace.Status{Code: int32(s.Code()), Message: s.Message()} |
| } else { |
| return trace.Status{Code: int32(code.Code_UNKNOWN), Message: err.Error()} |
| } |
| } |
| |
| // TODO (deklerk): switch to using OpenCensus function when it becomes available. |
| // Reference: https://github.com/googleapis/googleapis/blob/26b634d2724ac5dd30ae0b0cbfb01f07f2e4050e/google/rpc/code.proto |
| func httpStatusCodeToOCCode(httpStatusCode int) int32 { |
| switch httpStatusCode { |
| case 200: |
| return int32(code.Code_OK) |
| case 499: |
| return int32(code.Code_CANCELLED) |
| case 500: |
| return int32(code.Code_UNKNOWN) // Could also be Code_INTERNAL, Code_DATA_LOSS |
| case 400: |
| return int32(code.Code_INVALID_ARGUMENT) // Could also be Code_OUT_OF_RANGE |
| case 504: |
| return int32(code.Code_DEADLINE_EXCEEDED) |
| case 404: |
| return int32(code.Code_NOT_FOUND) |
| case 409: |
| return int32(code.Code_ALREADY_EXISTS) // Could also be Code_ABORTED |
| case 403: |
| return int32(code.Code_PERMISSION_DENIED) |
| case 401: |
| return int32(code.Code_UNAUTHENTICATED) |
| case 429: |
| return int32(code.Code_RESOURCE_EXHAUSTED) |
| case 501: |
| return int32(code.Code_UNIMPLEMENTED) |
| case 503: |
| return int32(code.Code_UNAVAILABLE) |
| default: |
| return int32(code.Code_UNKNOWN) |
| } |
| } |