cloudflared-mirror/vendor/go.opentelemetry.io/otel/sdk/resource/builtin.go

98 lines
2.9 KiB
Go

// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package resource // import "go.opentelemetry.io/otel/sdk/resource"
import (
"context"
"fmt"
"os"
"path/filepath"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/sdk"
semconv "go.opentelemetry.io/otel/semconv/v1.24.0"
)
type (
// telemetrySDK is a Detector that provides information about
// the OpenTelemetry SDK used. This Detector is included as a
// builtin. If these resource attributes are not wanted, use
// the WithTelemetrySDK(nil) or WithoutBuiltin() options to
// explicitly disable them.
telemetrySDK struct{}
// host is a Detector that provides information about the host
// being run on. This Detector is included as a builtin. If
// these resource attributes are not wanted, use the
// WithHost(nil) or WithoutBuiltin() options to explicitly
// disable them.
host struct{}
stringDetector struct {
schemaURL string
K attribute.Key
F func() (string, error)
}
defaultServiceNameDetector struct{}
)
var (
_ Detector = telemetrySDK{}
_ Detector = host{}
_ Detector = stringDetector{}
_ Detector = defaultServiceNameDetector{}
)
// Detect returns a *Resource that describes the OpenTelemetry SDK used.
func (telemetrySDK) Detect(context.Context) (*Resource, error) {
return NewWithAttributes(
semconv.SchemaURL,
semconv.TelemetrySDKName("opentelemetry"),
semconv.TelemetrySDKLanguageGo,
semconv.TelemetrySDKVersion(sdk.Version()),
), nil
}
// Detect returns a *Resource that describes the host being run on.
func (host) Detect(ctx context.Context) (*Resource, error) {
return StringDetector(semconv.SchemaURL, semconv.HostNameKey, os.Hostname).Detect(ctx)
}
// StringDetector returns a Detector that will produce a *Resource
// containing the string as a value corresponding to k. The resulting Resource
// will have the specified schemaURL.
func StringDetector(schemaURL string, k attribute.Key, f func() (string, error)) Detector {
return stringDetector{schemaURL: schemaURL, K: k, F: f}
}
// Detect returns a *Resource that describes the string as a value
// corresponding to attribute.Key as well as the specific schemaURL.
func (sd stringDetector) Detect(ctx context.Context) (*Resource, error) {
value, err := sd.F()
if err != nil {
return nil, fmt.Errorf("%s: %w", string(sd.K), err)
}
a := sd.K.String(value)
if !a.Valid() {
return nil, fmt.Errorf("invalid attribute: %q -> %q", a.Key, a.Value.Emit())
}
return NewWithAttributes(sd.schemaURL, sd.K.String(value)), nil
}
// Detect implements Detector.
func (defaultServiceNameDetector) Detect(ctx context.Context) (*Resource, error) {
return StringDetector(
semconv.SchemaURL,
semconv.ServiceNameKey,
func() (string, error) {
executable, err := os.Executable()
if err != nil {
return "unknown_service:go", nil
}
return "unknown_service:" + filepath.Base(executable), nil
},
).Detect(ctx)
}