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
|
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Package x contains support for OTel runtime instrumentation experimental features.
//
// This package should only be used for features defined in the specification.
// It should not be used for experiments or new project ideas.
package x // import "go.opentelemetry.io/contrib/instrumentation/runtime/internal/x"
import (
"os"
"strings"
)
// DeprecatedRuntimeMetrics is an experimental feature flag that defines if the deprecated
// runtime metrics should be produced. During development of the new
// conventions, it is enabled by default.
//
// To disable this feature set the OTEL_GO_X_DEPRECATED_RUNTIME_METRICS environment variable
// to the case-insensitive string value of "false" (i.e. "False" and "FALSE"
// will also enable this).
var DeprecatedRuntimeMetrics = newFeature("DEPRECATED_RUNTIME_METRICS", true)
// BoolFeature is an experimental feature control flag. It provides a uniform way
// to interact with these feature flags and parse their values.
type BoolFeature struct {
key string
defaultVal bool
}
func newFeature(suffix string, defaultVal bool) BoolFeature {
const envKeyRoot = "OTEL_GO_X_"
return BoolFeature{
key: envKeyRoot + suffix,
defaultVal: defaultVal,
}
}
// Key returns the environment variable key that needs to be set to enable the
// feature.
func (f BoolFeature) Key() string { return f.key }
// Enabled returns if the feature is enabled.
func (f BoolFeature) Enabled() bool {
v := os.Getenv(f.key)
if strings.ToLower(v) == "false" {
return false
}
if strings.ToLower(v) == "true" {
return true
}
return f.defaultVal
}
|
