logger

Documentation

Overview

Package logger basic and simple logger for application, it base the go embed `log` package. it's able to control output by log level, level order `all<debug<info<warn<error<none`.

Index

• Constants
• Variables
• func Prefix(level Level) string
• type Config
• type Level
• type Logger
  • func NewLogger(cfgs ...Config) *Logger
  • func (l Logger) Buffer() *bytes.Buffer
  • func (l Logger) DebugFunc(callback func() string)
  • func (l Logger) Debugf(message string, args ...interface{})
  • func (l Logger) ErrorFunc(callback func() string)
  • func (l Logger) Errorf(message string, args ...interface{})
  • func (l Logger) Format(prefix, message string, args ...interface{})
  • func (l Logger) InfoFunc(callback func() string)
  • func (l Logger) Infof(message string, args ...interface{})
  • func (l Logger) Log() *log.Logger
  • func (l Logger) WarnFunc(callback func() string)
  • func (l Logger) Warnf(message string, args ...interface{})

Examples

• NewLogger

Constants

const (
	DriverStdout = "stdout"
	DriverFile   = "file"
	DriverBuffer = "buffer"
)

DriverStdout logging driver support builtin

Variables

var DefaultConfig = Config{
	Level:  "warn",
	Driver: DriverStdout,
}

Functions

func Prefix

func Prefix(level Level) string

Types

type Config

type Config struct {
	Log   *log.Logger
	Level string
	// driver list: stdout, file, buffer
	Driver string
	// when Driver is file it will be work
	OutputDir string
}

Config builder logging configure.

type Level

type Level int8

const (
	LogAll Level = iota
	LogDebug
	LogInfo
	LogWarn
	LogError
	LogNone
)

logging Level constant

type Logger

type Logger struct {
	Level Level
	// contains filtered or unexported fields
}

func NewLogger

func NewLogger(cfgs ...Config) *Logger

NewLogger build a simple logger user it.

Example

lg := NewLogger(Config{Level: "error"})
lg.Debugf("it's a debug level message")
lg.Warnf("it's a warn level message")
lg.Errorf("it's a error level message")

Output:

10:19:38 [ERROR] it's a error level message

func (Logger) Buffer

func (l Logger) Buffer() *bytes.Buffer

func (Logger) DebugFunc

func (l Logger) DebugFunc(callback func() string)

func (Logger) Debugf

func (l Logger) Debugf(message string, args ...interface{})

func (Logger) ErrorFunc

func (l Logger) ErrorFunc(callback func() string)

func (Logger) Errorf

func (l Logger) Errorf(message string, args ...interface{})

func (Logger) Format

func (l Logger) Format(prefix, message string, args ...interface{})

func (Logger) InfoFunc

func (l Logger) InfoFunc(callback func() string)

func (Logger) Infof

func (l Logger) Infof(message string, args ...interface{})

func (Logger) Log

func (l Logger) Log() *log.Logger

Log get embed go lib log when you need the instance.

func (Logger) WarnFunc

func (l Logger) WarnFunc(callback func() string)

func (Logger) Warnf

func (l Logger) Warnf(message string, args ...interface{})