forked from ppenguin/goofys
/
logger.go
161 lines (133 loc) · 3.58 KB
/
logger.go
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// Copyright 2015 - 2017 Ka-Hing Cheung
//
// 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 common
import (
"fmt"
glog "log"
"log/syslog"
"os"
"strings"
"sync"
"github.com/sirupsen/logrus"
logrus_syslog "github.com/sirupsen/logrus/hooks/syslog"
)
var mu sync.Mutex
var loggers = make(map[string]*LogHandle)
var log = GetLogger("main")
var cloudLogLevel = logrus.InfoLevel
var syslogHook *logrus_syslog.SyslogHook
func InitLoggers(logToSyslog bool) {
if logToSyslog {
var err error
syslogHook, err = logrus_syslog.NewSyslogHook("", "", syslog.LOG_DEBUG, "")
if err != nil {
// we are the child process and we cannot connect to syslog,
// probably because we are in a container without syslog
// nothing much we can do here, printing to stderr doesn't work
return
}
for _, l := range loggers {
l.Hooks.Add(syslogHook)
}
}
}
func SetCloudLogLevel(level logrus.Level) {
cloudLogLevel = level
for k, logr := range loggers {
if k != "main" && k != "fuse" {
logr.Level = level
}
}
}
type LogHandle struct {
logrus.Logger
name string
Lvl *logrus.Level
}
func (l *LogHandle) Format(e *logrus.Entry) ([]byte, error) {
// Mon Jan 2 15:04:05 -0700 MST 2006
timestamp := ""
lvl := e.Level
if l.Lvl != nil {
lvl = *l.Lvl
}
if syslogHook == nil {
const timeFormat = "2006/01/02 15:04:05.000000"
timestamp = e.Time.Format(timeFormat) + " "
}
str := fmt.Sprintf("%v%v.%v %v",
timestamp,
l.name,
strings.ToUpper(lvl.String()),
e.Message)
if len(e.Data) != 0 {
str += " " + fmt.Sprint(e.Data)
}
str += "\n"
return []byte(str), nil
}
// for aws.Logger
func (l *LogHandle) Log(args ...interface{}) {
l.Debugln(args...)
}
func NewLogger(name string) *LogHandle {
l := &LogHandle{name: name}
l.Out = os.Stderr
l.Formatter = l
l.Level = logrus.InfoLevel
l.Hooks = make(logrus.LevelHooks)
if syslogHook != nil {
l.Hooks.Add(syslogHook)
}
return l
}
func GetLogger(name string) *LogHandle {
mu.Lock()
defer mu.Unlock()
if logger, ok := loggers[name]; ok {
if name != "main" && name != "fuse" {
logger.SetLevel(cloudLogLevel)
}
return logger
} else {
logger := NewLogger(name)
loggers[name] = logger
if name != "main" && name != "fuse" {
logger.SetLevel(cloudLogLevel)
}
return logger
}
}
func GetStdLogger(l *LogHandle, lvl logrus.Level) *glog.Logger {
return glog.New(l.WriterLevel(lvl), "", 0)
}
// retryablehttp logs messages using Printf("[DEBUG|ERR] message")
// logrus.Logger's Printf maps to INFO level, so this logger parses
// the the message to map to the correct log level
type RetryHTTPLogger struct {
*LogHandle
}
const DEBUG_TAG = "[DEBUG]"
const ERR_TAG = "[ERR]"
func (logger RetryHTTPLogger) Printf(format string, args ...interface{}) {
// unfortunately logrus.ParseLevel uses "error" instead of "err"
// so we have to map this ourselves
if strings.HasPrefix(format, DEBUG_TAG) {
logger.LogHandle.Debugf(format[len(DEBUG_TAG)+1:], args...)
} else if strings.HasPrefix(format, ERR_TAG) {
logger.LogHandle.Errorf(format[len(ERR_TAG)+1:], args...)
} else {
logger.LogHandle.Infof(format, args...)
}
}