micro/config/source/file/watcher.go
Shu Xian 2413cbcd80 fix file watcher event bug on Linux
the watcher can not normally get events of file changes on linux. it just can get the first two changes.
2019-08-19 15:28:24 +08:00

69 lines
1.1 KiB
Go

//+build !linux
package file
import (
"errors"
"os"
"github.com/fsnotify/fsnotify"
"github.com/micro/go-micro/config/source"
)
type watcher struct {
f *file
fw *fsnotify.Watcher
exit chan bool
}
func newWatcher(f *file) (source.Watcher, error) {
fw, err := fsnotify.NewWatcher()
if err != nil {
return nil, err
}
fw.Add(f.path)
return &watcher{
f: f,
fw: fw,
exit: make(chan bool),
}, nil
}
func (w *watcher) Next() (*source.ChangeSet, error) {
// is it closed?
select {
case <-w.exit:
return nil, errors.New("watcher stopped")
default:
}
// try get the event
select {
case event, _ := <-w.fw.Events:
if event.Op == fsnotify.Rename {
// check existence of file, and add watch again
_, err := os.Stat(event.Name)
if err == nil || os.IsExist(err) {
w.fw.Add(event.Name)
}
}
c, err := w.f.Read()
if err != nil {
return nil, err
}
return c, nil
case err := <-w.fw.Errors:
return nil, err
case <-w.exit:
return nil, errors.New("watcher stopped")
}
}
func (w *watcher) Stop() error {
return w.fw.Close()
}