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logger.go
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logger.go
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// Copyright 2015 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 internal
import (
"fmt"
glog "log"
"os"
"strings"
"sync"
"github.com/Sirupsen/logrus"
)
var mu sync.Mutex
var loggers = make(map[string]*logHandle)
var log = GetLogger("main")
var fuseLog = GetLogger("fuse")
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
const timeFormat = "2006/01/02 15:04:05.000000"
lvl := e.Level
if l.lvl != nil {
lvl = *l.lvl
}
str := fmt.Sprintf("%v %v.%v %v",
e.Time.Format(timeFormat),
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
return l
}
func GetLogger(name string) *logHandle {
mu.Lock()
defer mu.Unlock()
if logger, ok := loggers[name]; ok {
return logger
} else {
logger := NewLogger(name)
loggers[name] = logger
return logger
}
}
func GetStdLogger(l *logHandle, lvl logrus.Level) *glog.Logger {
mu.Lock()
defer mu.Unlock()
w := l.Writer()
l.Formatter.(*logHandle).lvl = &lvl
l.Level = lvl
return glog.New(w, "", 0)
}