1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Copyright The OpenTelemetry 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 stdoutmetric_test
import (
"context"
"log"
"go.opentelemetry.io/otel/exporters/stdout/stdoutmetric"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/global"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
)
const (
instrumentationName = "github.com/instrumentron"
instrumentationVersion = "v0.1.0"
)
var (
meter = global.GetMeterProvider().Meter(
instrumentationName,
metric.WithInstrumentationVersion(instrumentationVersion),
)
loopCounter = metric.Must(meter).NewInt64Counter("function.loops")
paramValue = metric.Must(meter).NewInt64Histogram("function.param")
nameKey = attribute.Key("function.name")
)
func add(ctx context.Context, x, y int64) int64 {
nameKV := nameKey.String("add")
loopCounter.Add(ctx, 1, nameKV)
paramValue.Record(ctx, x, nameKV)
paramValue.Record(ctx, y, nameKV)
return x + y
}
func multiply(ctx context.Context, x, y int64) int64 {
nameKV := nameKey.String("multiply")
loopCounter.Add(ctx, 1, nameKV)
paramValue.Record(ctx, x, nameKV)
paramValue.Record(ctx, y, nameKV)
return x * y
}
func InstallExportPipeline(ctx context.Context) func() {
exporter, err := stdoutmetric.New(stdoutmetric.WithPrettyPrint())
if err != nil {
log.Fatalf("creating stdoutmetric exporter: %v", err)
}
pusher := controller.New(
processor.NewFactory(
simple.NewWithInexpensiveDistribution(),
exporter,
),
controller.WithExporter(exporter),
)
if err = pusher.Start(ctx); err != nil {
log.Fatalf("starting push controller: %v", err)
}
global.SetMeterProvider(pusher)
return func() {
if err := pusher.Stop(ctx); err != nil {
log.Fatalf("stopping push controller: %v", err)
}
}
}
func Example() {
ctx := context.Background()
// Registers a meter Provider globally.
cleanup := InstallExportPipeline(ctx)
defer cleanup()
log.Println("the answer is", add(ctx, multiply(ctx, multiply(ctx, 2, 2), 10), 2))
}
|
