/*
 * Copyright (C) 2014 Square, Inc.
 *
 * 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.squareup.okhttp;

import java.io.IOException;

public interface Callback {
  /**
   * Called when the request could not be executed due to cancellation, a
   * connectivity problem or timeout. Because networks can fail during an
   * exchange, it is possible that the remote server accepted the request
   * before the failure.
   */
  void onFailure(Request request, IOException e);

  /**
   * Called when the HTTP response was successfully returned by the remote
   * server. The callback may proceed to read the response body with {@link
   * Response#body}. The response is still live until its response body is
   * closed with {@code response.body().close()}. The recipient of the callback
   * may even consume the response body on another thread.
   *
   * <p>Note that transport-layer success (receiving a HTTP response code,
   * headers and body) does not necessarily indicate application-layer
   * success: {@code response} may still indicate an unhappy HTTP response
   * code like 404 or 500.
   */
  void onResponse(Response response) throws IOException;
}
