/
server.go
71 lines (62 loc) · 1.86 KB
/
server.go
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
// 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 main
import (
"context"
"log"
"gopkg.in/macaron.v1"
macarontrace "go.opentelemetry.io/contrib/plugins/macaron"
otelglobal "go.opentelemetry.io/otel/api/global"
otelkv "go.opentelemetry.io/otel/api/kv"
oteltrace "go.opentelemetry.io/otel/api/trace"
oteltracestdout "go.opentelemetry.io/otel/exporters/trace/stdout"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
var tracer = otelglobal.Tracer("macaron-server")
func main() {
initTracer()
m := macaron.Classic()
m.Use(macarontrace.Middleware("my-server"))
m.Get("/users/:id", func(ctx *macaron.Context) string {
id := ctx.Params("id")
name := getUser(ctx.Req.Context(), id)
return name
})
m.Run()
}
func initTracer() {
exporter, err := oteltracestdout.NewExporter(oteltracestdout.Options{PrettyPrint: true})
if err != nil {
log.Fatal(err)
}
cfg := sdktrace.Config{
DefaultSampler: sdktrace.AlwaysSample(),
}
tp, err := sdktrace.NewProvider(
sdktrace.WithConfig(cfg),
sdktrace.WithSyncer(exporter),
)
if err != nil {
log.Fatal(err)
}
otelglobal.SetTraceProvider(tp)
}
func getUser(ctx context.Context, id string) string {
_, span := tracer.Start(ctx, "getUser", oteltrace.WithAttributes(otelkv.String("id", id)))
defer span.End()
if id == "123" {
return "macarontrace tester"
}
return "unknown"
}