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// 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"
"strconv"
)
// 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 enable this feature set the OTEL_GO_X_DEPRECATED_RUNTIME_METRICS environment variable
// to the case-insensitive string value of "true" (i.e. "True" and "TRUE"
// will also enable this).
var DeprecatedRuntimeMetrics = newFeature("DEPRECATED_RUNTIME_METRICS", false)
// 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)
val, err := strconv.ParseBool(v)
if err != nil {
return f.defaultVal
}
return val
}
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