forked from jaegertracing/jaeger-client-go
/
baggage_setter.go
83 lines (76 loc) · 2.92 KB
/
baggage_setter.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
72
73
74
75
76
77
78
79
80
81
82
83
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package jaeger
import (
"github.com/opentracing/opentracing-go/log"
"github.com/uber/jaeger-client-go/internal/baggage"
)
// baggageSetter is an actor that can set a baggage value on a Span given certain
// restrictions (eg. maxValueLength).
type baggageSetter struct {
restrictionManager baggage.RestrictionManager
metrics *Metrics
}
func newBaggageSetter(restrictionManager baggage.RestrictionManager, metrics *Metrics) *baggageSetter {
return &baggageSetter{
restrictionManager: restrictionManager,
metrics: metrics,
}
}
// (NB) span should hold the lock before making this call
func (s *baggageSetter) setBaggage(span *Span, key, value string) {
var truncated bool
var prevItem string
restriction := s.restrictionManager.GetRestriction(span.serviceName(), key)
if !restriction.KeyAllowed() {
s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
s.metrics.BaggageUpdateFailure.Inc(1)
return
}
if len(value) > restriction.MaxValueLength() {
truncated = true
value = value[:restriction.MaxValueLength()]
s.metrics.BaggageTruncate.Inc(1)
}
prevItem = span.context.baggage[key]
s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
span.context = span.context.WithBaggageItem(key, value)
s.metrics.BaggageUpdateSuccess.Inc(1)
}
func (s *baggageSetter) logFields(span *Span, key, value, prevItem string, truncated, valid bool) {
if !span.context.IsSampled() {
return
}
fields := []log.Field{
log.String("event", "baggage"),
log.String("key", key),
log.String("value", value),
}
if prevItem != "" {
fields = append(fields, log.String("override", "true"))
}
if truncated {
fields = append(fields, log.String("truncated", "true"))
}
if !valid {
fields = append(fields, log.String("invalid", "true"))
}
span.logFieldsNoLocking(fields...)
}