frp/utils/xlog/ctx.go
2019-10-12 20:13:12 +08:00

43 lines
1.0 KiB
Go

// Copyright 2019 fatedier, fatedier@gmail.com
//
// 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 xlog
import (
"context"
)
type key int
const (
xlogKey key = 0
)
func NewContext(ctx context.Context, xl *Logger) context.Context {
return context.WithValue(ctx, xlogKey, xl)
}
func FromContext(ctx context.Context) (xl *Logger, ok bool) {
xl, ok = ctx.Value(xlogKey).(*Logger)
return
}
func FromContextSafe(ctx context.Context) *Logger {
xl, ok := ctx.Value(xlogKey).(*Logger)
if !ok {
xl = New()
}
return xl
}