mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-25 11:50:13 +01:00
50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
//go:build !go1.21
|
|
// +build !go1.21
|
|
|
|
/*
|
|
Copyright 2019 The logr Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package logr
|
|
|
|
import (
|
|
"context"
|
|
)
|
|
|
|
// FromContext returns a Logger from ctx or an error if no Logger is found.
|
|
func FromContext(ctx context.Context) (Logger, error) {
|
|
if v, ok := ctx.Value(contextKey{}).(Logger); ok {
|
|
return v, nil
|
|
}
|
|
|
|
return Logger{}, notFoundError{}
|
|
}
|
|
|
|
// FromContextOrDiscard returns a Logger from ctx. If no Logger is found, this
|
|
// returns a Logger that discards all log messages.
|
|
func FromContextOrDiscard(ctx context.Context) Logger {
|
|
if v, ok := ctx.Value(contextKey{}).(Logger); ok {
|
|
return v
|
|
}
|
|
|
|
return Discard()
|
|
}
|
|
|
|
// NewContext returns a new Context, derived from ctx, which carries the
|
|
// provided Logger.
|
|
func NewContext(ctx context.Context, logger Logger) context.Context {
|
|
return context.WithValue(ctx, contextKey{}, logger)
|
|
}
|