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fs_watcher.go
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fs_watcher.go
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// Copyright (c) 2021 The Jaeger 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.
package fswatcher
import "github.com/fsnotify/fsnotify"
// Watcher watches for Events and Errors once a resource is added to the watch list.
// Primarily used for mocking the fsnotify lib.
type Watcher interface {
Add(name string) error
Events() chan fsnotify.Event
Errors() chan error
}
// fsnotifyWatcherWrapper wraps the fsnotify.Watcher and implements Watcher.
type fsnotifyWatcherWrapper struct {
fsnotifyWatcher *fsnotify.Watcher
}
// Add adds the filename to watch.
func (f *fsnotifyWatcherWrapper) Add(name string) error {
return f.fsnotifyWatcher.Add(name)
}
// Events returns the fsnotify.Watcher's Events chan.
func (f *fsnotifyWatcherWrapper) Events() chan fsnotify.Event {
return f.fsnotifyWatcher.Events
}
// Errors returns the fsnotify.Watcher's Errors chan.
func (f *fsnotifyWatcherWrapper) Errors() chan error {
return f.fsnotifyWatcher.Errors
}
// NewWatcher creates a new fsnotifyWatcherWrapper, wrapping the fsnotify.Watcher.
func NewWatcher() (Watcher, error) {
w, err := fsnotify.NewWatcher()
return &fsnotifyWatcherWrapper{fsnotifyWatcher: w}, err
}