/
json_file_store_watcher.go
71 lines (63 loc) · 1.62 KB
/
json_file_store_watcher.go
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// Copyright 2016-2022 The Libsacloud Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !wasm
// +build !wasm
package fake
import (
"log"
"github.com/fsnotify/fsnotify"
)
func (s *JSONFileStore) startWatcher() {
ctx := s.Ctx
watcher, err := fsnotify.NewWatcher()
if err != nil {
panic(err)
}
log.Printf("file watch start: %q", s.Path)
go func() {
defer watcher.Close()
for {
select {
case event, ok := <-watcher.Events:
if !ok {
return
}
switch {
case event.Op&fsnotify.Write == fsnotify.Write,
event.Op&fsnotify.Create == fsnotify.Create,
event.Op&fsnotify.Rename == fsnotify.Rename:
if err := s.load(); err != nil {
log.Printf("reloading %q is failed: %s\n", s.Path, err)
}
if event.Op&fsnotify.Rename == fsnotify.Rename {
if err := watcher.Add(s.Path); err != nil {
panic(err)
}
}
log.Printf("reloaded: %q\n", s.Path)
}
case err, ok := <-watcher.Errors:
if !ok {
return
}
panic(err)
case <-ctx.Done():
return
}
}
}()
if err := watcher.Add(s.Path); err != nil {
panic(err)
}
}