/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 config_center

import (
	"fmt"
)

import (
	"github.com/apache/dubbo-go/remoting"
)

// ConfigurationListener for changing listener's event
type ConfigurationListener interface {
	// Process the notification event once there's any change happens on the config
	Process(*ConfigChangeEvent)
}

// ConfigChangeEvent for changing listener's event
type ConfigChangeEvent struct {
	Key        string
	Value      interface{}
	ConfigType remoting.EventType
}

func (c ConfigChangeEvent) String() string {
	return fmt.Sprintf("ConfigChangeEvent{key = %v , value = %v , changeType = %v}", c.Key, c.Value, c.ConfigType)
}