github.com/aacfactory/fns@v1.2.86-0.20240310083819-80d667fc0a17/logs/context.go (about)

     1  /*
     2   * Copyright 2023 Wang Min Xiang
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   * 	http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   *
    16   */
    17  
    18  package logs
    19  
    20  import (
    21  	"fmt"
    22  	"github.com/aacfactory/errors"
    23  	"github.com/aacfactory/fns/context"
    24  	"github.com/aacfactory/logs"
    25  )
    26  
    27  var (
    28  	contextKey = []byte("@fns:context:log")
    29  )
    30  
    31  func With(ctx context.Context, v logs.Logger) {
    32  	ctx.SetLocalValue(contextKey, v)
    33  }
    34  
    35  func Load(ctx context.Context) logs.Logger {
    36  	v := ctx.LocalValue(contextKey)
    37  	if v == nil {
    38  		panic(fmt.Sprintf("%+v", errors.Warning("fns: there is no log in context")))
    39  		return nil
    40  	}
    41  	lg, ok := v.(logs.Logger)
    42  	if !ok {
    43  		panic(fmt.Sprintf("%+v", errors.Warning("fns: contextKey in context is not github.com/aacfactory/logs.Logger")))
    44  		return nil
    45  	}
    46  	return lg
    47  }