forked from DataDog/dd-trace-go
-
Notifications
You must be signed in to change notification settings - Fork 0
/
option.go
77 lines (65 loc) · 2.02 KB
/
option.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
// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016 Datadog, Inc.
package twirp
import (
"math"
"github.com/nowfred/dd-trace-go/internal"
"github.com/nowfred/dd-trace-go/internal/globalconfig"
"github.com/nowfred/dd-trace-go/internal/namingschema"
)
const (
defaultClientServiceName = "twirp-client"
defaultServerServiceName = "twirp-server"
)
type config struct {
serviceName string
spanName string
analyticsRate float64
}
// Option represents an option that can be passed to Dial.
type Option func(*config)
func defaults(cfg *config) {
if internal.BoolEnv("DD_TRACE_TWIRP_ANALYTICS_ENABLED", false) {
cfg.analyticsRate = 1.0
} else {
cfg.analyticsRate = globalconfig.AnalyticsRate()
}
}
func clientDefaults(cfg *config) {
cfg.serviceName = namingschema.ServiceName(defaultClientServiceName)
cfg.spanName = namingschema.OpName(namingschema.TwirpClient)
defaults(cfg)
}
func serverDefaults(cfg *config) {
cfg.serviceName = namingschema.ServiceName(defaultServerServiceName)
// spanName is calculated dynamically since V0 span names are based on the twirp service name.
defaults(cfg)
}
// WithServiceName sets the given service name for the dialled connection.
// When the service name is not explicitly set, it will be inferred based on the
// request to the twirp service.
func WithServiceName(name string) Option {
return func(cfg *config) {
cfg.serviceName = name
}
}
// WithAnalytics enables Trace Analytics for all started spans.
func WithAnalytics(on bool) Option {
if on {
return WithAnalyticsRate(1.0)
}
return WithAnalyticsRate(math.NaN())
}
// WithAnalyticsRate sets the sampling rate for Trace Analytics events
// correlated to started spans.
func WithAnalyticsRate(rate float64) Option {
return func(cfg *config) {
if rate >= 0.0 && rate <= 1.0 {
cfg.analyticsRate = rate
} else {
cfg.analyticsRate = math.NaN()
}
}
}