| // Copyright 2018, 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 metric_test |
| |
| import ( |
| "net/http" |
| |
| "go.opencensus.io/metric" |
| "go.opencensus.io/metric/metricdata" |
| ) |
| |
| func ExampleRegistry_AddInt64Gauge() { |
| r := metric.NewRegistry() |
| // TODO: allow exporting from a registry |
| |
| g, _ := r.AddInt64Gauge("active_request", "Number of active requests, per method.", metricdata.UnitDimensionless, "method") |
| |
| http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) { |
| e, _ := g.GetEntry(metricdata.NewLabelValue(request.Method)) |
| e.Add(1) |
| defer e.Add(-1) |
| // process request ... |
| }) |
| } |