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rotate_file_hook.go
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/
rotate_file_hook.go
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package xlogrus
import (
"github.com/sirupsen/logrus"
"gopkg.in/natefinch/lumberjack.v2"
"io"
)
// RotateFileHook's config
type RotateFileConfig struct {
MaxSize int // default to 100 megabytes
MaxAge int // default not to remove old log
MaxBackups int // default to retain all old log files
LocalTime bool // default to use UTC time
Compress bool // default not to perform compression
Filename string // log filename (with filepath, filename and extension)
Level logrus.Level // log level
Formatter logrus.Formatter // text formatter
}
// Write log into files (split logs to files manually)
type RotateFileHook struct {
config *RotateFileConfig
logWriter io.Writer
}
func NewRotateFileHook(config *RotateFileConfig) logrus.Hook {
return &RotateFileHook{
config: config,
logWriter: &lumberjack.Logger{
Filename: config.Filename,
MaxSize: config.MaxSize,
MaxBackups: config.MaxBackups,
MaxAge: config.MaxAge,
LocalTime: config.LocalTime,
Compress: config.Compress,
},
}
}
func (r *RotateFileHook) Levels() []logrus.Level {
return logrus.AllLevels[:r.config.Level+1]
}
func (r *RotateFileHook) Fire(entry *logrus.Entry) error {
b, err := r.config.Formatter.Format(entry)
if err != nil {
return err // unreachable
}
_, _ = r.logWriter.Write(b) // lock
return nil
}