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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

/**
 * This holds methods used to race the cache with the network for a specific
 * channel. This interface is was designed with nsHttpChannel in mind, and it's
 * expected this will be the only class implementing it.
 */
[scriptable, builtinclass, uuid(4d963475-8b16-4c58-b804-8a23d49436c5)]
interface nsIRaceCacheWithNetwork : nsISupports
{

  /****************************************************************************
   * TEST ONLY: The following methods are for testing purposes only. Do not use
   * them to do anything important in your code.
   ****************************************************************************

  /**
   * Triggers network activity after given timeout. If timeout is 0, network
   * activity is triggered immediately. If the cache.asyncOpenURI callbacks
   * have already been called, the network activity may have already been triggered
   * or the content may have already been delivered from the cache, so this
   * operation will have no effect.
   *
   * @param timeout
   *        - the delay in milliseconds until the network will be triggered.
   */
  void test_triggerNetwork(in long timeout);

  /**
   * Normally a HTTP channel would immediately call AsyncOpenURI leading to the
   * cache storage to lookup the cache entry and return it. In order to
   * simmulate real life conditions where fetching a cache entry takes a long
   * time, we set a timer to delay the operation.
   * Can only be called on the main thread.
   *
   * @param timeout
   *        - the delay in milliseconds until the cache open will be triggered.
   */
  void test_delayCacheEntryOpeningBy(in long timeout);

  /**
   * Immediatelly triggers AsyncOpenURI if the timer hasn't fired.
   * Can only be called on the main thread.
   * This is only called in tests to reliably trigger the opening of the cache
   * entry.
   * @throws NS_ERROR_NOT_AVAILABLE if opening the cache wasn't delayed.
   */
  void test_triggerDelayedOpenCacheEntry();
};