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log.go
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log.go
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// Copyright 2015-2018 HenryLee. All Rights Reserved.
//
// 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 tp
import (
"log"
"os"
"sync"
"github.com/henrylee2cn/go-logging"
"github.com/henrylee2cn/go-logging/color"
"github.com/henrylee2cn/goutil/graceful"
)
// Logger interface
type Logger interface {
// Level returns the logger's level.
Level() Level
// SetLevel sets the logger's level.
SetLevel(level Level)
// Printf formats according to a format specifier and writes to standard output.
// It returns the number of bytes written and any write error encountered.
Printf(format string, a ...interface{})
// Fatalf is equivalent to Criticalf followed by a call to os.Exit(1).
Fatalf(format string, a ...interface{})
// Panicf is equivalent to Criticalf followed by a call to panic().
Panicf(format string, a ...interface{})
// Criticalf logs a message using CRITICAL as log level.
Criticalf(format string, a ...interface{})
// Errorf logs a message using ERROR as log level.
Errorf(format string, a ...interface{})
// Warnf logs a message using WARNING as log level.
Warnf(format string, a ...interface{})
// Noticef logs a message using NOTICE as log level.
Noticef(format string, a ...interface{})
// Infof logs a message using INFO as log level.
Infof(format string, a ...interface{})
// Debugf logs a message using DEBUG as log level.
Debugf(format string, a ...interface{})
// Tracef logs a message using TRACE as log level.
Tracef(format string, a ...interface{})
}
var (
// global logger
globalLogger = func() Logger {
logger := newDefaultlogger(TRACE)
graceful.SetLog(logger)
return logger
}()
)
func newDefaultlogger(level Level) Logger {
l := &defaultLogger{
level: level,
}
l.newSet()
return l
}
type defaultLogger struct {
*logging.Logger
level Level
mu sync.RWMutex
}
func (l *defaultLogger) newSet() {
var consoleLogBackend = &logging.LogBackend{
Logger: log.New(color.NewColorableStdout(), "", 0),
ErrLogger: log.New(color.NewColorableStderr(), "", 0),
Color: true,
}
consoleFormat := logging.MustStringFormatter("[%{time:2006/01/02 15:04:05.000}] [%{color:bold}%{level:.4s}%{color:reset}] %{message} <%{longfile}>")
consoleBackendLevel := logging.AddModuleLevel(logging.NewBackendFormatter(consoleLogBackend, consoleFormat))
level, err := logging.LogLevel(levelMap[l.level])
if err != nil {
panic(err)
}
consoleBackendLevel.SetLevel(level, "")
l.Logger = logging.NewLogger("teleport")
l.Logger.SetBackend(consoleBackendLevel)
l.Logger.ExtraCalldepth++
}
// Level returns the logger's level.
// Note: Concurrent is not safe!
func (l *defaultLogger) Level() Level {
l.mu.RLock()
defer l.mu.RUnlock()
return l.level
}
// SetLevel sets the logger's level.
// Note:
// Concurrent is not safe!
// the teleport default logger's level list: OFF PRINT CRITICAL ERROR WARNING NOTICE INFO DEBUG TRACE
func (l *defaultLogger) SetLevel(level Level) {
l.mu.Lock()
defer l.mu.Unlock()
l.level = level
l.newSet()
}
// GetLogger gets global logger.
func GetLogger() Logger {
return globalLogger
}
// SetLogger sets global logger.
// Note: Concurrent is not safe!
func SetLogger(logger Logger) {
if logger == nil {
return
}
globalLogger = logger
graceful.SetLog(logger)
}
// Level defines all available log levels for log messages.
type Level int
// Log levels.
const (
OFF Level = iota
PRINT
CRITICAL
ERROR
WARNING
NOTICE
INFO
DEBUG
TRACE
)
var levelMap = map[Level]string{
OFF: "OFF",
PRINT: "PRINT",
CRITICAL: "CRITICAL",
ERROR: "ERROR",
WARNING: "WARNING",
NOTICE: "NOTICE",
INFO: "INFO",
DEBUG: "DEBUG",
TRACE: "TRACE",
}
func (l Level) String() string {
s, ok := levelMap[l]
if !ok {
return "unknown"
}
return s
}
// GetLoggerLevel gets the logger's level.
func GetLoggerLevel() Level {
return globalLogger.Level()
}
// SetLoggerLevel sets the logger's level by string.
func SetLoggerLevel(level string) {
for k, v := range levelMap {
if v == level {
globalLogger.SetLevel(k)
return
}
}
log.Printf("Unknown level string: %s", level)
}
// SetLoggerLevel2 sets the logger's level by number.
func SetLoggerLevel2(level Level) {
_, ok := levelMap[level]
if !ok {
log.Printf("Unknown level number: %d", level)
return
}
globalLogger.SetLevel(level)
}
// Printf formats according to a format specifier and writes to standard output.
// It returns the number of bytes written and any write error encountered.
func Printf(format string, a ...interface{}) {
globalLogger.Printf(format, a...)
}
// Fatalf is equivalent to l.Criticalf followed by a call to os.Exit(1).
func Fatalf(format string, a ...interface{}) {
globalLogger.Fatalf(format, a...)
os.Exit(1)
}
// Panicf is equivalent to l.Criticalf followed by a call to panic().
func Panicf(format string, a ...interface{}) {
globalLogger.Panicf(format, a...)
}
// Criticalf logs a message using CRITICAL as log level.
func Criticalf(format string, a ...interface{}) {
globalLogger.Criticalf(format, a...)
}
// Errorf logs a message using ERROR as log level.
func Errorf(format string, a ...interface{}) {
globalLogger.Errorf(format, a...)
}
// Warnf logs a message using WARNING as log level.
func Warnf(format string, a ...interface{}) {
globalLogger.Warnf(format, a...)
}
// Noticef logs a message using NOTICE as log level.
func Noticef(format string, a ...interface{}) {
globalLogger.Noticef(format, a...)
}
// Infof logs a message using INFO as log level.
func Infof(format string, a ...interface{}) {
globalLogger.Infof(format, a...)
}
// Debugf logs a message using DEBUG as log level.
func Debugf(format string, a ...interface{}) {
globalLogger.Debugf(format, a...)
}
// Tracef logs a message using TRACE as log level.
func Tracef(format string, a ...interface{}) {
globalLogger.Tracef(format, a...)
}