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option.go
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option.go
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package eventlog
import (
"bufio"
"io"
"os"
"github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/Sirupsen/logrus"
"github.com/ipfs/go-ipfs/Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2"
)
// init sets up sane defaults
func init() {
Configure(TextFormatter)
Configure(Output(os.Stderr))
// has the effect of disabling logging since we log event entries at Info
// level by convention
Configure(LevelError)
}
type Option func()
// Configure applies the provided options sequentially from left to right
func Configure(options ...Option) {
for _, f := range options {
f()
}
}
// LdJSONFormatter Option formats the event log as line-delimited JSON
var LdJSONFormatter = func() {
logrus.SetFormatter(&PoliteJSONFormatter{})
}
// TextFormatter Option formats the event log as human-readable plain-text
var TextFormatter = func() {
logrus.SetFormatter(&logrus.TextFormatter{})
}
type LogRotatorConfig struct {
Filename string
MaxSizeMB int
MaxBackups int
MaxAgeDays int
}
func Output(w io.Writer) Option {
return func() {
logrus.SetOutput(w)
// TODO return previous Output option
}
}
func OutputRotatingLogFile(config LogRotatorConfig) Option {
return func() {
logrus.SetOutput(
bufio.NewWriter(&lumberjack.Logger{
Filename: config.Filename,
MaxSize: int(config.MaxSizeMB),
MaxBackups: int(config.MaxBackups),
MaxAge: int(config.MaxAgeDays),
}))
}
}
// LevelDebug Option sets the log level to debug
var LevelDebug = func() {
logrus.SetLevel(logrus.DebugLevel)
}
// LevelDebug Option sets the log level to error
var LevelError = func() {
logrus.SetLevel(logrus.ErrorLevel)
}
// LevelDebug Option sets the log level to info
var LevelInfo = func() {
logrus.SetLevel(logrus.InfoLevel)
}