content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.csp.sentinel.property;
  
  /**
   * This class holds callback method when {@link SentinelProperty#updateValue(Object)} need inform the listener
   *
   * @author jialiang.linjl
   */
  public interface PropertyListener<T> {
  
      /**
       * Callback method when {@link SentinelProperty#updateValue(Object)} need inform the listener.
       *
       * @param value updated value.
       */
      void configUpdate(T value);
  
      /**
       * The first time of the {@code value}'s load.
       *
       * @param value the value loaded.
       */
      void configLoad(T value);
  }
  