github.com/cloudwego/kitex@v0.9.0/tool/internal_pkg/log/log.go (about)

     1  // Copyright 2021 CloudWeGo Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //   http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package log
    16  
    17  import (
    18  	"fmt"
    19  	"io"
    20  	"os"
    21  )
    22  
    23  // Verbose decides whether the informatc logs should be output.
    24  var Verbose bool
    25  
    26  // Logger .
    27  type Logger struct {
    28  	Println func(w io.Writer, a ...interface{}) (n int, err error)
    29  	Printf  func(w io.Writer, format string, a ...interface{}) (n int, err error)
    30  }
    31  
    32  var defaultLogger = Logger{
    33  	Println: fmt.Fprintln,
    34  	Printf:  fmt.Fprintf,
    35  }
    36  
    37  // SetDefaultLogger sets the default logger.
    38  func SetDefaultLogger(l Logger) {
    39  	defaultLogger = l
    40  }
    41  
    42  // Warn .
    43  func Warn(v ...interface{}) {
    44  	defaultLogger.Println(os.Stderr, v...)
    45  }
    46  
    47  // Warnf .
    48  func Warnf(format string, v ...interface{}) {
    49  	defaultLogger.Printf(os.Stderr, format, v...)
    50  }
    51  
    52  // Info .
    53  func Info(v ...interface{}) {
    54  	if Verbose {
    55  		defaultLogger.Println(os.Stderr, v...)
    56  	}
    57  }
    58  
    59  // Infof .
    60  func Infof(format string, v ...interface{}) {
    61  	if Verbose {
    62  		defaultLogger.Printf(os.Stderr, format, v...)
    63  	}
    64  }