-
Notifications
You must be signed in to change notification settings - Fork 1.3k
Expand file tree
/
Copy pathconfig.go
More file actions
111 lines (94 loc) · 3.39 KB
/
config.go
File metadata and controls
111 lines (94 loc) · 3.39 KB
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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package metric // import "go.opentelemetry.io/otel/metric"
import (
"slices"
"go.opentelemetry.io/otel/attribute"
)
// MeterConfig contains options for Meters.
type MeterConfig struct {
instrumentationVersion string
schemaURL string
attrs attribute.Set
// Ensure forward compatibility by explicitly making this not comparable.
noCmp [0]func() //nolint: unused // This is indeed used.
}
// InstrumentationVersion returns the version of the library providing
// instrumentation.
func (cfg MeterConfig) InstrumentationVersion() string {
return cfg.instrumentationVersion
}
// InstrumentationAttributes returns the attributes associated with the library
// providing instrumentation.
func (cfg MeterConfig) InstrumentationAttributes() attribute.Set {
return cfg.attrs
}
// SchemaURL is the schema_url of the library providing instrumentation.
func (cfg MeterConfig) SchemaURL() string {
return cfg.schemaURL
}
// MeterOption is an interface for applying Meter options.
type MeterOption interface {
// applyMeter is used to set a MeterOption value of a MeterConfig.
applyMeter(MeterConfig) MeterConfig
}
// NewMeterConfig creates a new MeterConfig and applies
// all the given options.
func NewMeterConfig(opts ...MeterOption) MeterConfig {
var config MeterConfig
for _, o := range opts {
config = o.applyMeter(config)
}
return config
}
type meterOptionFunc func(MeterConfig) MeterConfig
func (fn meterOptionFunc) applyMeter(cfg MeterConfig) MeterConfig {
return fn(cfg)
}
// WithInstrumentationVersion sets the instrumentation version.
func WithInstrumentationVersion(version string) MeterOption {
return meterOptionFunc(func(config MeterConfig) MeterConfig {
config.instrumentationVersion = version
return config
})
}
// WithInstrumentationAttributes adds the instrumentation attributes.
//
// This is equivalent to calling [WithInstrumentationAttributeSet] with an
// [attribute.Set] created from a clone of the passed attributes.
// [WithInstrumentationAttributeSet] is recommended for more control.
//
// If multiple [WithInstrumentationAttributes] or [WithInstrumentationAttributeSet]
// options are passed, the attributes will be merged together in the order
// they are passed. Attributes with duplicate keys will use the last value passed.
func WithInstrumentationAttributes(attr ...attribute.KeyValue) MeterOption {
set := attribute.NewSet(slices.Clone(attr)...)
return WithInstrumentationAttributeSet(set)
}
// WithInstrumentationAttributeSet adds the instrumentation attributes.
//
// If multiple [WithInstrumentationAttributes] or [WithInstrumentationAttributeSet]
// options are passed, the attributes will be merged together in the order
// they are passed. Attributes with duplicate keys will use the last value passed.
func WithInstrumentationAttributeSet(set attribute.Set) MeterOption {
if set.Len() == 0 {
return meterOptionFunc(func(config MeterConfig) MeterConfig {
return config
})
}
return meterOptionFunc(func(config MeterConfig) MeterConfig {
if config.attrs.Len() == 0 {
config.attrs = set
} else {
config.attrs = mergeSets(config.attrs, set)
}
return config
})
}
// WithSchemaURL sets the schema URL.
func WithSchemaURL(schemaURL string) MeterOption {
return meterOptionFunc(func(config MeterConfig) MeterConfig {
config.schemaURL = schemaURL
return config
})
}