chromium/components/offline_pages/core/background/offliner_policy.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_OFFLINER_POLICY_H_
#define COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_OFFLINER_POLICY_H_

namespace offline_pages {

// The max number of started tries is to guard against pages that make the
// background loader crash. It should be greater than or equal to the max
// number of completed tries.
constexpr int kMaxStartedTries = …;
// The number of max completed tries is based on Gin2G-poor testing showing that
// we often need about 4 tries with a 2 minute window, or 3 retries with a 3
// minute window. Also, we count one try now for foreground/disabled requests.
constexpr int kMaxCompletedTries = …;
// By the time we get to a week, the user has forgotten asking for a page.
constexpr int kRequestExpirationTimeInSeconds = …;

// Scheduled background processing time limits.
constexpr int kDozeModeBackgroundServiceWindowSeconds = …;
constexpr int kDefaultBackgroundProcessingTimeBudgetSeconds = …;
constexpr int kSinglePageTimeLimitWhenBackgroundScheduledSeconds = …;

// Immediate processing time limits.  Note: experiments on GIN-2g-poor show many
// page requests took 3 or 4 attempts in background scheduled mode with timeout
// of 2 minutes. So for immediate processing mode, give page requests just under
// 5 minutes, which was equal to the timeout limit in prerender. Then budget up
// to 3 of those requests in processing window.
// TODO(petewil): Consider if we want to up the immediate window to 8 minutes
// now that we are always using the background loader.
constexpr int kSinglePageTimeLimitForImmediateLoadSeconds = …;
constexpr int kImmediateLoadProcessingTimeBudgetSeconds = …;

// Policy for the Background Offlining system.  Some policy will belong to the
// RequestCoordinator, some to the RequestQueue, and some to the Offliner.
class OfflinerPolicy { … };
}  // namespace offline_pages

#endif  // COMPONENTS_OFFLINE_PAGES_CORE_BACKGROUND_OFFLINER_POLICY_H_