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
|
// 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 stdouttrace_test
import (
"context"
"log"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.7.0"
"go.opentelemetry.io/otel/trace"
)
const (
instrumentationName = "github.com/instrumentron"
instrumentationVersion = "v0.1.0"
)
var (
tracer = otel.GetTracerProvider().Tracer(
instrumentationName,
trace.WithInstrumentationVersion(instrumentationVersion),
trace.WithSchemaURL(semconv.SchemaURL),
)
)
func add(ctx context.Context, x, y int64) int64 {
var span trace.Span
_, span = tracer.Start(ctx, "Addition")
defer span.End()
return x + y
}
func multiply(ctx context.Context, x, y int64) int64 {
var span trace.Span
_, span = tracer.Start(ctx, "Multiplication")
defer span.End()
return x * y
}
func Resource() *resource.Resource {
return resource.NewWithAttributes(
semconv.SchemaURL,
semconv.ServiceNameKey.String("stdout-example"),
semconv.ServiceVersionKey.String("0.0.1"),
)
}
func InstallExportPipeline(ctx context.Context) func() {
exporter, err := stdouttrace.New(stdouttrace.WithPrettyPrint())
if err != nil {
log.Fatalf("creating stdout exporter: %v", err)
}
tracerProvider := sdktrace.NewTracerProvider(
sdktrace.WithBatcher(exporter),
sdktrace.WithResource(Resource()),
)
otel.SetTracerProvider(tracerProvider)
return func() {
if err := tracerProvider.Shutdown(ctx); err != nil {
log.Fatalf("stopping tracer provider: %v", err)
}
}
}
func Example() {
ctx := context.Background()
// Registers a tracer Provider globally.
cleanup := InstallExportPipeline(ctx)
defer cleanup()
log.Println("the answer is", add(ctx, multiply(ctx, multiply(ctx, 2, 2), 10), 2))
}
|
