watcher.go

// Copyright 2020 lack
//
// 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 memory

import (
	"github.com/lack-io/vine/service/config/source"
)

type watcher struct {
	Id      string
	Updates chan *source.ChangeSet
	Source  *memory
}

func (w *watcher) Next() (*source.ChangeSet, error) {
	cs := <-w.Updates
	return cs, nil
}

func (w *watcher) Stop() error {
	w.Source.Lock()
	delete(w.Source.Watchers, w.Id)
	w.Source.Unlock()
	return nil
}