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- // Copyright 2017, OpenCensus 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.
-
- package readme
-
- import (
- "context"
- "log"
-
- "go.opencensus.io/tag"
- )
-
- func tagsExamples() {
- ctx := context.Background()
-
- osKey, err := tag.NewKey("example.com/keys/user-os")
- if err != nil {
- log.Fatal(err)
- }
- userIDKey, err := tag.NewKey("example.com/keys/user-id")
- if err != nil {
- log.Fatal(err)
- }
-
- // START new
- ctx, err = tag.New(ctx,
- tag.Insert(osKey, "macOS-10.12.5"),
- tag.Upsert(userIDKey, "cde36753ed"),
- )
- if err != nil {
- log.Fatal(err)
- }
- // END new
-
- // START profiler
- ctx, err = tag.New(ctx,
- tag.Insert(osKey, "macOS-10.12.5"),
- tag.Insert(userIDKey, "fff0989878"),
- )
- if err != nil {
- log.Fatal(err)
- }
- tag.Do(ctx, func(ctx context.Context) {
- // Do work.
- // When profiling is on, samples will be
- // recorded with the key/values from the tag map.
- })
- // END profiler
- }
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