124 lines
3.5 KiB
Go
124 lines
3.5 KiB
Go
// Copyright 2019, OpenTelemetry 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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// Sample contains a program that exports to the OpenCensus service.
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package main
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import (
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"context"
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"fmt"
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"log"
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"math/rand"
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"os"
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"time"
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"contrib.go.opencensus.io/exporter/ocagent"
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"go.opencensus.io/stats"
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"go.opencensus.io/stats/view"
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"go.opencensus.io/tag"
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"go.opencensus.io/trace"
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)
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func main() {
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oce, err := ocagent.NewExporter(
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ocagent.WithInsecure(),
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ocagent.WithServiceName(fmt.Sprintf("example-go-%d", os.Getpid())))
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if err != nil {
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log.Fatalf("Failed to create ocagent-exporter: %v", err)
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}
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trace.RegisterExporter(oce)
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view.RegisterExporter(oce)
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// Some configurations to get observability signals out.
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view.SetReportingPeriod(7 * time.Second)
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trace.ApplyConfig(trace.Config{
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DefaultSampler: trace.AlwaysSample(),
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})
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// Some stats
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keyClient, _ := tag.NewKey("client")
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keyMethod, _ := tag.NewKey("method")
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mLatencyMs := stats.Float64("latency", "The latency in milliseconds", "ms")
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mLineLengths := stats.Int64("line_lengths", "The length of each line", "By")
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views := []*view.View{
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{
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Name: "opdemo/latency",
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Description: "The various latencies of the methods",
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Measure: mLatencyMs,
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Aggregation: view.Distribution(0, 10, 50, 100, 200, 400, 800, 1000, 1400, 2000, 5000, 10000, 15000),
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TagKeys: []tag.Key{keyClient, keyMethod},
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},
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{
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Name: "opdemo/process_counts",
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Description: "The various counts",
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Measure: mLatencyMs,
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Aggregation: view.Count(),
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TagKeys: []tag.Key{keyClient, keyMethod},
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},
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{
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Name: "opdemo/line_lengths",
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Description: "The lengths of the various lines in",
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Measure: mLineLengths,
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Aggregation: view.Distribution(0, 10, 20, 50, 100, 150, 200, 500, 800),
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TagKeys: []tag.Key{keyClient, keyMethod},
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},
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{
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Name: "opdemo/line_counts",
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Description: "The counts of the lines in",
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Measure: mLineLengths,
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Aggregation: view.Count(),
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TagKeys: []tag.Key{keyClient, keyMethod},
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},
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}
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if err := view.Register(views...); err != nil {
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log.Fatalf("Failed to register views for metrics: %v", err)
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}
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ctx, _ := tag.New(context.Background(), tag.Insert(keyMethod, "repl"), tag.Insert(keyClient, "cli"))
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rng := rand.New(rand.NewSource(time.Now().UnixNano()))
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for {
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startTime := time.Now()
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_, span := trace.StartSpan(context.Background(), "Foo")
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var sleep int64
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switch modulus := time.Now().Unix() % 5; modulus {
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case 0:
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sleep = rng.Int63n(17001)
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case 1:
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sleep = rng.Int63n(8007)
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case 2:
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sleep = rng.Int63n(917)
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case 3:
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sleep = rng.Int63n(87)
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case 4:
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sleep = rng.Int63n(1173)
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}
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time.Sleep(time.Duration(sleep) * time.Millisecond)
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span.End()
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latencyMs := float64(time.Since(startTime)) / 1e6
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nr := int(rng.Int31n(7))
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for i := 0; i < nr; i++ {
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randLineLength := rng.Int63n(999)
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stats.Record(ctx, mLineLengths.M(randLineLength))
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fmt.Printf("#%d: LineLength: %dBy\n", i, randLineLength)
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}
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stats.Record(ctx, mLatencyMs.M(latencyMs))
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fmt.Printf("Latency: %.3fms\n", latencyMs)
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}
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}
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