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.nacos.common.http;
  
  import com.alibaba.nacos.common.model.RestResult;
  
  /**
   * Http callback.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  public interface Callback<T> {
      
      /**
       * Callback after the request is responded.
       *
       * @param result {@link RestResult}
       */
      void onReceive(RestResult<T> result);
      
      /**
       * An error occurred during the request.
       *
       * @param throwable {@link Throwable}
       */
      void onError(Throwable throwable);
      
      /**
       * Callback when the request is cancelled.
       */
      void onCancel();
      
  }
  