blob: 416d80590db4ea0df5076f18a82028d2248dd2c0 (
plain) (
blame)
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
|
// Copyright 2018, OpenCensus 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 trace
import (
"context"
"encoding/hex"
"go.opencensus.io/exemplar"
)
func init() {
exemplar.RegisterAttachmentExtractor(attachSpanContext)
}
func attachSpanContext(ctx context.Context, a exemplar.Attachments) exemplar.Attachments {
span := FromContext(ctx)
if span == nil {
return a
}
sc := span.SpanContext()
if !sc.IsSampled() {
return a
}
if a == nil {
a = make(exemplar.Attachments)
}
a[exemplar.KeyTraceID] = hex.EncodeToString(sc.TraceID[:])
a[exemplar.KeySpanID] = hex.EncodeToString(sc.SpanID[:])
return a
}
|
