/
timed_file_handler.go
92 lines (79 loc) · 2.21 KB
/
timed_file_handler.go
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// Copyright (c) 2015, 2016 Janoš Guljaš <janos@resenje.org>
// All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package logging
import (
"os"
"path/filepath"
"sync"
)
// TimedFileHandler writes all log messages to file with name
// constructed from record time.
// If file or directoeies on provided path do not exist they will be created.
type TimedFileHandler struct {
NullHandler
Level Level
Formatter Formatter
Directory string
FileExtension string
FilenameLayout string
FileMode os.FileMode
DirectoryMode os.FileMode
timestamp string
file *os.File
lock sync.RWMutex
}
// GetLevel returns minimal log level that this handler will process.
func (handler *TimedFileHandler) GetLevel() Level {
return handler.Level
}
// Close releases resources used by this handler (file that log messages
// were written into).
func (handler *TimedFileHandler) Close() (err error) {
handler.lock.Lock()
err = handler.close()
handler.lock.Unlock()
return
}
func (handler *TimedFileHandler) close() error {
if handler.file != nil {
if err := handler.file.Close(); err != nil {
return err
}
handler.file = nil
}
handler.timestamp = ""
return nil
}
// Handle writes message from log record into file.
func (handler *TimedFileHandler) Handle(record *Record) (err error) {
handler.lock.Lock()
defer handler.lock.Unlock()
if handler.FilenameLayout == "" {
handler.FilenameLayout = "2006-01-02"
}
timestamp := record.Time.Format(handler.FilenameLayout)
if handler.timestamp != timestamp || handler.file == nil {
filename := filepath.Join(handler.Directory, timestamp)
if handler.FileExtension != "" {
filename += handler.FileExtension
}
if handler.DirectoryMode == 0 {
handler.DirectoryMode = 0750
}
if err = os.MkdirAll(filepath.Dir(filename), handler.DirectoryMode); err != nil {
return err
}
if handler.FileMode == 0 {
handler.FileMode = 0640
}
handler.file, err = os.OpenFile(filename, os.O_APPEND|os.O_WRONLY|os.O_CREATE, handler.FileMode)
if err != nil {
return err
}
}
msg := handler.Formatter.Format(record) + "\n"
_, err = handler.file.Write([]byte(msg))
return
}