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39 lines
1.2 KiB
Go
39 lines
1.2 KiB
Go
// Copyright 2018, OpenCensus Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metric_test
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import (
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"net/http"
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"go.opencensus.io/metric"
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"go.opencensus.io/metric/metricdata"
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)
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func ExampleRegistry_AddInt64Gauge() {
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r := metric.NewRegistry()
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// TODO: allow exporting from a registry
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g, _ := r.AddInt64Gauge("active_request",
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metric.WithDescription("Number of active requests, per method."),
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metric.WithUnit(metricdata.UnitDimensionless),
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metric.WithLabelKeys("method"))
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http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
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e, _ := g.GetEntry(metricdata.NewLabelValue(request.Method))
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e.Add(1)
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defer e.Add(-1)
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// process request ...
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})
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}
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