forked from ginuerzh/gost
/
reload.go
51 lines (43 loc) · 865 Bytes
/
reload.go
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package gost
import (
"io"
"os"
"time"
"github.com/go-log/log"
)
// Reloader is the interface for objects that support live reloading.
type Reloader interface {
Reload(r io.Reader) error
Period() time.Duration
}
// PeriodReload reloads the config periodically according to the period of the reloader.
func PeriodReload(r Reloader, configFile string) error {
var lastMod time.Time
for {
f, err := os.Open(configFile)
if err != nil {
return err
}
finfo, err := f.Stat()
if err != nil {
f.Close()
return err
}
mt := finfo.ModTime()
if !mt.Equal(lastMod) {
log.Log("[reload]", configFile)
r.Reload(f)
lastMod = mt
}
f.Close()
period := r.Period()
if period <= 0 {
log.Log("[reload] disabled:", configFile)
return nil
}
if period < time.Second {
period = time.Second
}
<-time.After(period)
}
}